> ## Content Index > Fetch the complete content index at: https://ataricave.com/llms.txt > Use this file to discover other available public pages before exploring further. # Best SFX Power Supply for Engineers and SFF Builds - URL: https://ataricave.com/best-sfx-power-supply-engineers/ - Published: 2026-09-07T06:44:04.000Z - Updated: 2026-09-07T09:49:16.000Z - Description: Six SFX and SFX-L units compared on wattage, warranty, ATX 3.1 compliance and cable loadout, with picks matched to the build you're actually planning. - Author: Lamar Calhoun - Tags: Computers & Networking, #PC Building, Power Supplies The best SFX power supply for engineers is the **Lian Li SP750 V2 Gold**, a 750W ATX 3.1 unit that fits a 3.94 x 4.92 x 2.5 in footprint and ships with a native 12V-2x6 connector and a 10-year warranty. If you want more headroom and RGB visibility for a showcase workstation, the **ASUS ROG Loki SFX-L 750W Platinum** is the better call, provided your case accepts the longer SFX-L depth. In this guide 1. [Best SFX power supply for engineers at a glance](#best-sfx-power-supply-for-engineers-at-a-glance) 2. [How I narrowed six SFX units down for engineer builds](#how-i-narrowed-six-sfx-units-down-for-engineer-builds) 3. [What actually decides an SFX power supply?](#what-actually-decides-an-sfx-power-supply) 4. [1\. Lian Li SP750 V2 Gold 750W — Best overall](#1-lian-li-sp750-v2-gold-750w-%E2%80%94-best-overall) 5. [2\. ASUS ROG Loki SFX-L 750W Platinum — Best premium](#2-asus-rog-loki-sfx-l-750w-platinum-%E2%80%94-best-premium) 6. [3\. Super Flower Combat SFX FG 850W — Best warranty](#3-super-flower-combat-sfx-fg-850w-%E2%80%94-best-warranty) 7. [4\. GAMEMAX GS-850G 850W — Most versatile](#4-gamemax-gs-850g-850w-%E2%80%94-most-versatile) 8. [5\. GOLDEN FIELD 550W SFX — Best for families](#5-golden-field-550w-sfx-%E2%80%94-best-for-families) 9. [6\. Apevia SFX-AP500W — Best budget pick](#6-apevia-sfx-ap500w-%E2%80%94-best-budget-pick) 10. [SFX vs SFX-L: does the extra 30mm matter?](#sfx-vs-sfx-l-does-the-extra-30mm-matter) 11. [Does the engineer angle hold up here?](#does-the-engineer-angle-hold-up-here) 12. [Cables, connectors and the 12V-2x6 question](#cables-connectors-and-the-12v-2x6-question) 13. [What to check before you click buy](#what-to-check-before-you-click-buy) 14. [The verdict](#the-verdict) 15. [FAQ](#faq) ## Best SFX power supply for engineers at a glance | Pick | Wattage | ATX standard | Warranty | Price | | ---------------------------------------------------------------------------------------------------------- | ------------ | ------------ | -------------------------- | -------------------------------------------------------------------- | | **Best overall**[Lian Li SP750 V2 Gold](https://www.amazon.com/dp/B0FJD8RSBH?tag=ataricave-20) | 750W | ATX 3.1 | 10 years | [Check Price](https://www.amazon.com/dp/B0FJD8RSBH?tag=ataricave-20) | | **Best premium**[ASUS ROG Loki SFX-L 750W Platinum](https://www.amazon.com/dp/B0BZFQZR81?tag=ataricave-20) | 750W (SFX-L) | ATX 3.0 | 10 years core, 3 years RGB | [Check Price](https://www.amazon.com/dp/B0BZFQZR81?tag=ataricave-20) | | **Best warranty**[Super Flower Combat SFX FG 850W](https://www.amazon.com/dp/B0GKD4BV4S?tag=ataricave-20) | 850W | ATX 3.1 | 10 years | [Check Price](https://www.amazon.com/dp/B0GKD4BV4S?tag=ataricave-20) | | **Most versatile**[GAMEMAX GS-850G 850W](https://www.amazon.com/dp/B0DCJNP1K1?tag=ataricave-20) | 850W | ATX 3.0 | Not listed | [Check Price](https://www.amazon.com/dp/B0DCJNP1K1?tag=ataricave-20) | | **Best for families**[GOLDEN FIELD 550W SFX](https://www.amazon.com/dp/B0FVM4JFCB?tag=ataricave-20) | 550W | ATX 3.1 | Listing claim: 10 years | [Check Price](https://www.amazon.com/dp/B0FVM4JFCB?tag=ataricave-20) | | **Best budget pick**[Apevia SFX-AP500W](https://www.amazon.com/dp/B08R5NN4FJ?tag=ataricave-20) | 500W | Not stated | 1 year | [Check Price](https://www.amazon.com/dp/B08R5NN4FJ?tag=ataricave-20) | ## How I narrowed six SFX units down for engineer builds Three cuts got applied before anything reached this shortlist. First cut: form factor. Every unit here fits an SFX bay or, in the ROG Loki's case, an SFX-L bay that most modern ITX cases support with a spec check. Second cut: any listing without a published wattage or dimensions was dropped. A small form factor build lives and dies by the millimetre, so a PSU that hides those numbers gets no room on the bench. Third cut: I dropped units where the connector loadout looked incomplete for a workstation, which meant needing at least a PCIe path capable of supporting a modern GPU plus the CPU 8-pin or 4+4. What survived is a mixed bag on purpose. Wattage runs from 500W up to 850W. Efficiency ratings run from Gold up to Platinum. Two units are ATX 3.1 with native 12V-2x6, two are ATX 3.0 with 12VHPWR, and the cheapest doesn't state a standard at all. That range is the point: engineers building compact machines make very different calls depending on GPU choice, thermal budget and whether the case sits in an office or a lab. **Set composition worth noting.** Four of the six carry a 10-year warranty term in the listing. Only one, the ROG Loki, is SFX-L rather than pure SFX. Only three list weight, which matters if you're mounting vertically or shipping a system. ## What actually decides an SFX power supply? Most SFX guides open with wattage. Wattage is a floor, not a decider. Once you're above the sustained draw of your CPU and GPU with sensible headroom, going higher earns you almost nothing on a compact rig. Here is what actually decides it, in order: 1. **Physical fit.** SFX is 100 x 125 x 63.5mm. SFX-L pushes the length to around 130mm. Some ITX cases refuse SFX-L. Check the case spec before the PSU spec. 2. **Connector loadout for your specific GPU.** A Gen 5 card wants a 12V-2x6 pathway. An older card wants two 8-pin PCIe. The wrong loadout means adapters, and adapters in a cramped case are a heat and cable-management problem. 3. **Fan behaviour.** Every unit in this set claims a fluid dynamic bearing fan or a PWM curve. What matters is the size: a 92mm fan on the Lian Li and Super Flower runs faster to move the same air as the 120mm fan on the SFX-L ROG Loki. 4. **Warranty term.** Four of these six list a 10-year warranty. That's the honest signal of how long the maker expects the capacitors and fan to hold, and it's a bigger comfort in a headless rig than any single efficiency figure. **Efficiency certification is a tiebreaker, not a headline.** 80 Plus Gold, Platinum and Cybenetics Gold all describe useful ranges, but the delta on a 300W sustained load in a compact office rig is measured in single-digit watts. Fit and connectors matter more. ## 1\. Lian Li SP750 V2 Gold 750W — Best overall **A 2025 ATX 3.1 refresh that lands the right compromise between wattage, connector loadout and warranty for a compact engineer's workstation.** [![Lian Li SP750 V2 Gold in white with modular cables — shows the compact SFX footprint that fits ITX cases](https://m.media-amazon.com/images/I/31K3ga0+TmL._SL500_.jpg)](https://www.amazon.com/dp/B0FJD8RSBH?tag=ataricave-20) **Best for:** a compact workstation running a Gen 5 GPU in a tight ITX case **Skip it if:** your case only accepts standard SFX depth and colour doesn't matter, or you want black hardware Within this set, the SP750 V2 is the only pure SFX unit that combines a native 12V-2x6 connector, ATX 3.1 certification and a 10-year warranty at the 750W tier. That's a specific slot to fill, and it matches what an engineer typically wants: a compact chassis that pairs with a current-generation GPU without adapter shenanigans. The 3.94 x 4.92 x 2.5 in body is standard SFX, so case compatibility is broad. Weight is 3.92 lb, which is on the heavier side of the set and suggests the transformer and heatsinking aren't cut back. Lian Li says the 92mm FDB fan handles the thermal load quietly, and the listing calls out an upgraded 5VSB rail on this V2 revision. The two-tone 12V-2x6 cable is a small but useful engineering touch: it gives you a visual cue that the connector is fully seated, which matters in a case where you can barely see the plug once the GPU is in. The trade-off is price position. This is the second-most expensive pick here, and it's white, which won't suit every case build. **Pros:** - ATX 3.1 with a native 12V-2x6 cable in the box - Standard SFX 3.94 x 4.92 x 2.5 in footprint - 10-year warranty from the listing - 92mm FDB fan for quieter idle - Two-tone cable for connector alignment **Cons:** - Premium price position in this set - Only listed in white - 750W caps your GPU headroom for future top-tier cards [Check Price on Amazon](https://www.amazon.com/dp/B0FJD8RSBH?tag=ataricave-20) ## 2\. ASUS ROG Loki SFX-L 750W Platinum — Best premium **An SFX-L unit that trades depth for a 120mm ARGB fan and Aura Sync ecosystem integration.** [![ASUS ROG Loki SFX-L 750W with 120mm ARGB fan — shows why SFX-L cases need the extra clearance](https://m.media-amazon.com/images/I/41oPTZVM3UL._SL500_.jpg)](https://www.amazon.com/dp/B0BZFQZR81?tag=ataricave-20) **Best for:** a showcase SFF build where lighting, cooling headroom and brand ecosystem matter **Skip it if:** your case is strict SFX or you dislike RGB in a work machine The Loki is the only SFX-L unit here, and that's the fact that decides whether it's a candidate. Its 2.5 x 4.9 x 4.9 in body is longer than the 3.94-inch depth of the Lian Li and Super Flower, which some ITX cases won't accept. Check your case's PSU compatibility list first. Once it fits, the payoff is real: a 120mm PWM fan runs slower than a 92mm fan at the same airflow, and ASUS claims Lambda A certified noise levels below 25 dB. 80 Plus Platinum certification means it operates at up to 92% efficiency by the listing, which cuts heat production in a case that already struggles with airflow. ATX 3.0 rather than 3.1 puts it a half-step behind the Lian Li on paper, but the bundled 16-pin cable still pipes up to 600W to a Gen 5 GPU. The 4 lb weight is the heaviest in the set. Warranty splits: 10 years on the core, 3 years on the RGB LEDs, which is honest labelling for a lit product. Against the Lian Li, this unit costs more, needs a compatible case and adds RGB you may not want in a workstation. **Pros:** - 120mm ARGB fan, quieter than 92mm rivals at load - 80 Plus Platinum certification - 16-pin PCIe cable supporting up to 600W - Aura Sync integration for ASUS boards - 10-year core warranty **Cons:** - SFX-L depth won't fit strict SFX cases - Most expensive pick in the set - RGB is not universally wanted in a work rig - ATX 3.0 rather than the newer 3.1 [Check Price on Amazon](https://www.amazon.com/dp/B0BZFQZR81?tag=ataricave-20) ## 3\. Super Flower Combat SFX FG 850W — Best warranty **An 850W ATX 3.1 SFX unit with a Cybenetics Gold rating and a 10-year warranty from a brand known for OEM PSU work.** [![Super Flower Combat SFX FG 850W in black with ribbon cables — shows the ribbon-cable modular design](https://m.media-amazon.com/images/I/41pg77lL2FL._SL500_.jpg)](https://www.amazon.com/dp/B0GKD4BV4S?tag=ataricave-20) **Best for:** a headless render node or lab rig you plan to leave running for years **Skip it if:** you want a proven track record rather than a 2026 release Super Flower makes power supplies that end up rebadged under other brands, so seeing the name on the box in an SFX form is uncommon and welcome. This one runs 850W in a 2.5 x 3.93 x 4.92 in body, which is standard SFX depth, and it lists a 10-year warranty. Super Flower calls out Cybenetics Gold rather than 80 Plus Gold, which is a stricter real-world measurement that includes noise and low-load efficiency. The all-ribbon modular cabling is easier to route in a tight case than braided sleeves. It's ATX 3.1 with PCIe 5.1 ready, and it lists modern standby compatibility, which matters if the rig sleeps and wakes for scheduled tasks. Weight is 3.7 lb. The release date on the listing is 2026, so this is a very new product with less field data than the older Lian Li and ASUS units. For a lab machine, the warranty term is what to lean on. For a machine you can't afford to have offline, waiting six months for reviews to settle is a defensible move. The trade-off is exactly that novelty: this is a new SKU, and you're trusting the maker's reputation more than long-term user feedback. **Pros:** - ATX 3.1 with PCIe 5.1 support - Cybenetics Gold, a stricter test protocol - 10-year warranty on a fresh SKU - All-ribbon modular cables - 850W headroom in an SFX body **Cons:** - 2026 release means limited third-party data - No weight advantage over the Lian Li despite lower efficiency tier - Priced above the Lian Li on paper [Check Price on Amazon](https://www.amazon.com/dp/B0GKD4BV4S?tag=ataricave-20) ## 4\. GAMEMAX GS-850G 850W — Most versatile **850W and a full-modular design at a mid-range price, with the older ATX 3.0 spec and a 12VHPWR connector for current GPUs.** [![GAMEMAX GS-850G 850W SFX in black with fully modular cabling — shows the 12VHPWR pathway for a Gen 5 GPU](https://m.media-amazon.com/images/I/41rMk3AzTAL._SL500_.jpg)](https://www.amazon.com/dp/B0DCJNP1K1?tag=ataricave-20) **Best for:** a mid-priced 850W build with a hungry current-gen GPU **Skip it if:** you need ATX 3.1 compliance or a published warranty term GAMEMAX's proposition here is uncomplicated. You get 850W, 80 Plus Gold certification, a 12VHPWR 16-pin connector rated for up to 600W by the listing, and a full-modular layout in a standard SFX shell. GAMEMAX describes an APFC plus LLC plus DC-DC topology, which is the modern approach for holding tight voltage regulation under transient loads. Japanese 105°C capacitors are called out on the main rails. Protection coverage in the listing spans OVP, UVP, OPP, SCP, OCP and OTP, which is the standard set you'd want on a workstation PSU. Where it lags is spec disclosure. The listing does not publish weight, dimensions or a warranty term, which is unusual for a Gold-tier SFX unit and unhelpful when you're planning a build. It's also ATX 3.0 rather than 3.1, which is a minor gap in practice: 3.1 tightened transient response and standby power figures rather than reinventing the standard, so 3.0 remains fine for the vast majority of current GPUs. Against the Lian Li and Super Flower, this pick trades documentation and the newer standard for extra wattage at a lower price position. **Pros:** - 850W in a standard SFX shell - Native 12VHPWR up to 600W - 80 Plus Gold with modern APFC plus LLC topology - Full protection suite in the listing **Cons:** - No published warranty term - No published weight or dimensions in the listing - ATX 3.0 rather than 3.1 - Least documented of the six on core figures [Check Price on Amazon](https://www.amazon.com/dp/B0DCJNP1K1?tag=ataricave-20) ## 5\. GOLDEN FIELD 550W SFX — Best for families **A 550W Platinum-rated SFX unit at the entry price band, aimed at compact shared-use builds that don't need 750W or more.** [![GOLDEN FIELD 550W SFX in black with modular cables — shows the ultra-compact 100mm width for tight ITX cases](https://m.media-amazon.com/images/I/41JZg+toevL._SL500_.jpg)](https://www.amazon.com/dp/B0FVM4JFCB?tag=ataricave-20) **Best for:** a shared home PC or a kid's first SFF build under 550W **Skip it if:** you need the native 12V-2x6 cable in the box At 550W, this is the second-cheapest pick here, and it aims squarely at builds that don't need to feed a top-tier GPU. GOLDEN FIELD claims 80 Plus Platinum efficiency with up to 93% at 50% load on 115V, 100% Japanese capacitors on the primary and a pure copper transformer. Dimensions are 2.52 x 4.92 x 3.94 in, standard SFX. Weight is 1.87 lb, the lightest in this set by a wide margin, which reflects the smaller power stage rather than any corner-cutting on its face. Two important caveats sit inside the listing. The 550W model has a native 12V-2x6 connector on the PSU side but doesn't ship with the 12V-2x6 cable in the box, so if you want to run a Gen 5 GPU on it you'll need to buy that cable separately. The listing also mentions a 10-year warranty. That's a manufacturer claim rather than a widely observed track record on this specific SKU, so treat it as a promise to hold the maker to rather than a settled fact. This works well for a family desktop or a first SFF build where the graphics workload stays modest. For a workstation GPU, step up to 750W or higher. **Pros:** - 80 Plus Platinum claim at up to 93% efficiency - Standard SFX 2.52 x 4.92 x 3.94 in body - 1.87 lb, lightest in the set - ATX 3.1 with native connector **Cons:** - 550W caps GPU choice - 12V-2x6 cable not in the box on this model - Warranty term is a listing claim on a newer brand - No 750W option in the same family listed here [Check Price on Amazon](https://www.amazon.com/dp/B0FVM4JFCB?tag=ataricave-20) ## 6\. Apevia SFX-AP500W — Best budget pick **A 500W non-modular SFX unit for low-draw ITX systems where the priority is fitting the bay for the least money.** [![Apevia SFX-AP500W in black with fixed cabling — shows the older SFX layout for low-power office builds](https://m.media-amazon.com/images/I/41wL4kzuu9L._SL500_.jpg)](https://www.amazon.com/dp/B08R5NN4FJ?tag=ataricave-20) **Best for:** an office ITX box, a NAS or a low-power secondary machine **Skip it if:** the system pulls more than about 350W sustained The Apevia is the cheapest of the six and the simplest. Dimensions are 2.5 x 4.92 x 3.94 in, standard SFX. The connector list from the listing covers a 20+4 pin main, an 8-pin (4+4) CPU, one 6/8-pin PCIe, three SATA and two Molex, which is enough for a modest ITX build with a low-power discrete GPU or an APU. The 8-pin CPU splits into 4+4 for older boards. Two sellers list it, which is worth noting: this is a 2021-vintage design that has been on the market long enough to have real user history. The reality check: this is not a workstation PSU. There is no ATX 3.1 or 3.0 certification stated. There is no 12VHPWR or 12V-2x6 connector. The warranty is 1 year, versus 10 years on the other four picks that publish a term. It's here because for a NAS, a small office PC or a secondary machine that never sees a hungry GPU, none of those omissions matter and the price position does. Against the rest of the set, this pick loses on warranty, on modern connector support and on efficiency certification. It wins on fit for a build that doesn't need any of those things. **Pros:** - Cheapest of the six - Standard SFX dimensions - Complete connector set for low-power builds - Two sellers list it, older proven design **Cons:** - No published efficiency certification - 1-year warranty vs 10 years elsewhere - No 12V-2x6 or 12VHPWR pathway - Not suitable for a workstation GPU [Check Price on Amazon](https://www.amazon.com/dp/B08R5NN4FJ?tag=ataricave-20) ## SFX vs SFX-L: does the extra 30mm matter? Only one unit in this set, the ASUS ROG Loki, is SFX-L. Everything else is standard SFX. The difference is 30mm of length, which the Loki uses to fit a 120mm fan instead of a 92mm one. For an engineer's rig, the practical effects are three: - **Case compatibility.** Some ITX cases only accept 100 x 125 x 63.5mm SFX. Check the manufacturer's PSU list before you assume. - **Fan noise at load.** A 120mm fan can move the same air as a 92mm fan at lower RPM. If the workstation runs sustained loads for hours, that's audible. - **Cable clearance behind the PSU.** SFX-L eats into the space where cables loop back. Ribbon cables help, but a strict SFX case will feel tighter with SFX-L. If the case supports SFX-L and lighting is on the table, the Loki earns its position. If the case is pure SFX or you're not sure, stay with the Lian Li SP750 V2 or the Super Flower Combat. ## Does the engineer angle hold up here? Straight answer: partially. None of these six SFX units is marketed specifically to engineers. Amazon's search returned SFF power supplies broadly, so the "for engineers" qualifier isn't something the products themselves claim to satisfy. That said, three attributes matter more for engineering workloads than for general gaming, and this shortlist handles them: 1. **Long warranty terms.** Four of the six list 10 years. For a machine that runs unattended overnight renders, simulations or CI builds, the warranty is the honest measure of expected life. 2. **Tight voltage regulation on transient loads.** ATX 3.0 and 3.1 both address transient spike behaviour. Four of the six comply with one or the other. 3. **Full modular cabling.** Every unit here except the Apevia is fully modular, which matters when you're routing cables around thermal probes, extra storage or a capture card. If your workload leans toward long unattended runs, weight the warranty and the ATX standard heavily. If it leans toward burst compute plus a hungry GPU, weight the wattage and the connector loadout. ## Cables, connectors and the 12V-2x6 question The connector story on modern SFX units is where builds go sideways. Two units here have native 12V-2x6 connectors on the PSU: the Lian Li SP750 V2 and the GOLDEN FIELD 550W. The Lian Li ships with the cable. The GOLDEN FIELD 550W does not, per its listing. That's a hidden cost if you plan to run a Gen 5 GPU on the smaller unit. The GAMEMAX ships with a 12VHPWR 16-pin, which is the older connector spec and works with current GPUs. The ROG Loki ships with a 16-pin PCIe cable rated to 600W. The Super Flower is ATX 3.1 with PCIe 5.1 support. The Apevia does not offer a 12-pin path at all, only a single 6/8-pin PCIe. **The short rule:** if your GPU has a 16-pin power input, buy a PSU that ships with the matching cable in the box. Do not rely on adapters in an SFX case where cable bend radius is already a fight. ## What to check before you click buy Ten minutes of preparation prevents an hour of unboxing regret. Before you order, check: - The case's PSU compatibility list, specifically whether it accepts SFX-L or only pure SFX - Your GPU's power input: 8-pin, 12VHPWR, or 12V-2x6 - Whether the PSU listing ships the matching cable, or expects you to buy one - The CPU power connector on your motherboard: 8-pin, 4+4, or dual 8-pin - Sustained system draw at your typical workload, not peak, so you can size wattage sensibly - Whether your workflow needs modern standby wake support If any of those answers is "not sure", pause and check the manuals rather than assuming. SFX builds punish assumptions harder than full-tower builds do because there's less room to route around a wrong cable. ## The verdict The **Lian Li SP750 V2 Gold 750W** is the pick for most engineers building a compact workstation. It combines ATX 3.1, a native 12V-2x6 cable in the box, standard SFX 3.94-inch depth and a 10-year warranty. That's the shortest path to a rig that runs a Gen 5 GPU, fits any modern ITX case and won't need replacing in three years. Two conditions flip it. First, if your case supports SFX-L and you want the quietest run at sustained load, the **ASUS ROG Loki SFX-L 750W Platinum** brings a 120mm ARGB fan, 80 Plus Platinum certification and Aura Sync integration for ASUS-based builds. Second, if you're building an 850W rig and you want the newest ATX 3.1 spec at a lower price position than the Loki, the **Super Flower Combat SFX FG 850W** is the call, with a Cybenetics Gold rating and the same 10-year warranty. For anything under 550W of expected draw, the GOLDEN FIELD saves money without giving up the Platinum efficiency tier. For a NAS or a low-draw secondary, the Apevia does the fitting-in job for the least outlay. ## FAQ ### Is 750W enough for an engineer's SFF workstation? Is 750W enough depends on the GPU. A current mid-range Gen 5 card and a modern 8-core CPU sit comfortably within 750W with headroom for storage and USB peripherals. If you're running a top-tier 400W-class GPU alongside a 200W-class CPU, step up to 850W with the Super Flower Combat or the GAMEMAX GS-850G. Wattage above what your rig actually pulls earns you nothing. ### What's the difference between ATX 3.0 and ATX 3.1? The difference between ATX 3.0 and 3.1 is mostly refinement rather than reinvention. ATX 3.1 tightens transient response requirements, adjusts standby power specs, and formalises the 12V-2x6 connector. Both handle Gen 5 GPUs. On this list, the Lian Li, Super Flower and GOLDEN FIELD are ATX 3.1\. The ASUS ROG Loki and GAMEMAX are ATX 3.0\. For most builds today, either is fine. ### Lian Li SP750 V2 vs ASUS ROG Loki: which for a workstation? Lian Li SP750 V2 vs ROG Loki comes down to case type. The Lian Li is standard SFX at 3.94-inch depth and fits any modern ITX case. The Loki is SFX-L at 4.9-inch depth and needs a case that accepts the longer body. If your case takes SFX-L and you want a 120mm fan for lower noise at sustained load, the Loki wins. Otherwise the Lian Li is the safer pick. ### Do I need a native 12V-2x6 cable for a Gen 5 GPU? Do I need a native 12V-2x6 cable in most cases, yes. Gen 5 GPUs use either 12VHPWR or 12V-2x6, and running through adapters in an SFX case creates cable bend problems and adds a failure point. The Lian Li SP750 V2 ships with the cable. The GOLDEN FIELD 550W lists a native connector on the PSU but does not include the cable, per its listing. ### Is an SFX power supply worth it over a standard ATX unit? An SFX power supply is worth it when the case demands it. If you're building in an ITX or SFF case, SFX or SFX-L is the only option. In a mid-tower ATX case, a standard ATX PSU costs less for the same wattage and cools more easily. The compactness of SFX carries a price premium and a smaller fan. Pay it when the chassis requires it, not before. If you've read this far, you've already done the harder part: matching the PSU to the case, the GPU and the workload rather than chasing wattage for its own sake. Start with the Lian Li SP750 V2 Gold if your build fits the pattern of a Gen 5 GPU in a standard SFX case. Verify your case's SFX-L compatibility before considering the ROG Loki, and check the connector loadout against your GPU one more time before you order. A 10-year warranty makes the Lian Li a defensible default for a machine you plan to keep running for the long haul. *Last updated: September 11, 2026\. Product availability re-checked.* *This page contains affiliate links. As an Amazon Associate we earn from qualifying purchases, at no extra cost to you.*