30/03/2026 4:10 pm
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just started my first real SFF build in a FormD T1 and man the space constraints are hitting me hard already. I'm trying to power a 7800X3D and a 4080 Super so I know I need something reliable but also quiet because the PC is gonna sit right on my desk next to my monitor. I'm kinda torn between a few options and the more I read the more I get confused about what actually fits and stays cool.
My logic was to just grab the Corsair SF750 because literally every single thread on the SFF forums says it is the gold standard but I am worried 750w might be cutting it a bit close with the power spikes on the 4080 even though its platinum rated. Plus it doesn't have the native 12VHPWR cable so I'd have to use that bulky adapter which seems like a nightmare for cable management in a case this small. Then I saw the new 2024 Corsair SF850 which has the native cable and more headroom but it is nearly 200 bucks and I have seen some people say the cables are a bit stiffer which might make the bends harder in the T1.
The third option I was looking at was the Cooler Master V850 SFX because it is way cheaper and I can get it delivered by Wednesday but I've heard the fan curve is super aggressive and loud. I am in Oregon and really need to have this thing built by next Friday for a LAN party so I am on a bit of a tight timeline here. Budget is around 180 or so but I can go higher if it actually makes a difference in noise or ease of installation.
Is the SF750 still the king for a 4080 Super build or should I be looking at the newer ATX 3.0/3.1 stuff for the dedicated GPU cable? I really dont want to have to deal with a loud fan or cables that wont bend...
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30/03/2026 4:10 pm
Honestly, just go with the Corsair SF850 80 PLUS Platinum ATX 3.1. I am super satisfied with mine and it handles a similar high-end setup without breaking a sweat. I know everyone loves the old SF750, but the native 12VHPWR cable on the new 850 is a game changer for the FormD T1. Trying to cram that bulky Nvidia adapter in there is a total nightmare and usually blocks half your airflow. The cables on the new SF850 are a bit different, yeah. Theyre slightly stiffer than the legendary braided ones on the old version, but honestly they are shorter and designed for SFF cases specifically. I didnt have much trouble routing them. The 7800X3D is actually pretty power efficient, so you wont be hitting 850W, but having that extra headroom for the 4080 Super spikes gives me peace of mind. Plus, its dead silent. I havent heard the fan kick on once during normal gaming sessions. Skip the Cooler Master V850 SFX Gold 850W. I tried it in a previous build and the fan curve is annoying as hell. It revs up and down constantly which is distracting when the PC is right next to your head. It works well enough if you dont care about noise, but for a desk build? No way. TL;DR: Grab the Corsair SF850 80 PLUS Platinum ATX 3.1. Its worth the extra cash for the native GPU cable and silence. You wont regret it for a T1 build.
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30/03/2026 4:45 pm
@Reply #1 - good point! Native cables really do save a lot of headache when you're working with something as tight as the T1. I've been building in SFF cases for about 8 years now and honestly, the space management never gets easier, but the parts definitely get better. I just finished a similar build and here's my experience with a couple of units that might fit your timeline:
- SilverStone Extreme 850R Platinum 850W SFX: I've been using this for about six months now and I am super satisfied. It is Cybenetics Platinum rated and it includes that native 12VHPWR cable you're looking for. The fan curve is surprisingly quiet even under load, which was my biggest worry since my PC is also right on the desk. It handles those transient spikes without even a click. The cables are also pretty flexible for a stock set.
- Corsair SF750 80 PLUS Platinum SFX: I still have this in my main rig and it works well even with high-end cards. People overstate how much wattage you actually need for a 4080 Super tho... it's a very efficient card. The real issue is just those bulky stock cables and that adapter. If you go this route, you really gotta budget for custom unsleeved cables to save your sanity in the T1.
- Phanteks Revolt 850W Platinum SFX: Tried this in a build for a friend last month. No complaints at all. It's based on a really solid Seasonic platform and the cables were actually easier to bend than the ones that come with the new Corsair units. If you're on a tight timeline for that LAN party, I'd probably grab the SilverStone if you can find it. It's been rock solid for me and fits the T1 layout perfectly without much fuss.
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30/03/2026 4:55 pm
Good to know!
