Bad PSU choice?

[Niku-Sama]

alright i needed to swap out the tiny evga SFX sized 450w PSU in the system i'm using now for the new video card on the way and i was driving my self insane with research so i decided to just pick one from a brand i know something about.

I ordered this:

750W Gold Power Supply | Fully Modular

This PSU delivers 750 watts of reliable power without sacrificing affordability and offers ideal power for most gaming needs

nzxt.com

i made sure to get model PA-7G1BB-US because i read something about the previous 2020 model it had some noise issues, i didnt read too far into it.
but i ordered on amazon so i should be able to return or cancel the order if it was a mistake. it was an impulsive order before i could ask on here...

i always have a hard time picking PSUs

 

[EarthDog]

Not sure who the oem is on those. I'm sure the quality is no worse than OK. I would have went with 850W though, especially if it's just an 'ok' quality power supply.

Edit: reviews show it as plenty capable... so that's good. I ran a 12900k and 3090ti on a 750w without issue, but upgraded to make sure. So far, the 4090 and 12900k hasn't peaked over the 528W the 3090ti did... so there's that.

 

[Niku-Sama]

well it wont matter because i am cancelling the order. when i put it in it said it would be delivered by next friday. now its telling me Nov 4th
this **** always happens when i finally make a damn decision

 

[Woomack]

Lian-Li 850W SFX PCIe 5.0 is great. Corsair SF750 750W Plat. (or any other PSU from the SF series) is highly recommended too, but I don't think they have PCIe 5.0 version. It's hard to get low-quality SFX Gold/Platinum PSU. In the worst case, the fan will make some noise under high PSU load, but most Gold or Platinum PSUs won't spin the fan up to 40% load.
For a longer time, I've been using FSP 850W Dagger Pro 80+ Gold, and I have had no problems (in some reviews, there are comments it's louder than competitive units, but I haven't heard that). I also have Montech Century Mini 750W 80+ Gold which I'm using for 7950X/RX6800XT tests. Let's say not a popular brand, and most of its products are average, but this PSU seems pretty good. I guess the OEM for this unit is the same as Enermax, but I could be wrong. Enermax PSUs are good too, but I don't think they refreshed their SFX series in the last 2 years.
I literally replaced all ATX PSUs at home with SFX.

 

[Niku-Sama]

oh it doesent have to be SFX any more, i needed the space in an old case but i've since changed, i'm using the adapter to the ATX mount in the current case now. still small so would need modular.
i just need something to be in by next week and i cant count on newegg to do that any more and amazon is flakey chancing their dates after order so i think i am stuck with Worst Buy now.

at least their prices follow market trends now

edit:
well this might work out, one of the corsair i was looking at (RM750) just dropped $30 to $99 and its in stock locally and places i'm headed this weekend for the retro gaming expo.

@EarthDog , I get what your saying about going 850W but this system is technically a secondary one. i'm just using it everyday because of room restraints. Right now its a R5 2600, GTX 1660 Super, 16 GB rams and 2 m.2 drives. I'll be running the 3070 ti i got on ebay in it once it arrives but when my living situation changes its going in the big system to replace the 2070 with noctuas zip tied to it

 

[Zerileous]

It looks like a 3070 Ti can pull about 300W stock, some OC boards up to 360W. The 2600 should pull maybe 130W on the high end. You could always use a PSU calculator but seems like 750W would be enough with a high quality PSU. Lower quality I would bump the wattage. Could probably even get away with 650w if you're not overclocking. You can use the calculator here for a more precise estimate of power use https://outervision.com/power-supply-calculator

RM 750 would be a great choice imho.

 

[EarthDog]

I think his new video card, the end game, is an RTX 4090. 650W is fine with a 3070Ti, but not the 4090.

 

[Zerileous]

There's been a lot of back and forth about the new power adapter knowing whether the card can draw 450W or 600W based on whether it has 3 or 4 8-pins attached, but I've also heard that it doesn't actually reach the power limit because of voltage. Should buyers planning to overclock "budget" 600W for the card, or is 450W-500W adequate?

Either way I would see a high quality 850W as the bare minimum.

 

[EarthDog]

Well, the 4090s are rated around 450W. The watercooled suprim liquid x is 480W. It requires a 600W pcie 5.0 connector. The 3090ti suprim x was also 480W...it came with a 450W connector.

I would plan for use based on the specs of the card, not what the connector is rated for. I can tell you, for MY situation (2560x1440, ultra, 165 FPS limit the card didn't peak over 325W. I'm sure without a limiter or higher resolutions you'll get all 450/480w out of the card. The 4090 suprim x has 10% power limit adjustment so max would be around 530W.... but yeah, it's be tough to reach that on air...

For the last month or so, I've had a kill a watt that saves mins/peaks and so far, that system with 3090ti and now a 4090, peaked at 528W (titanim-class 850W seasonic psu).

 

[Niku-Sama]

OK i am back from my convention weekend! i got all sorts of things/pictures to share and i thought i'd start here

It looks like a 3070 Ti can pull about 300W stock, some OC boards up to 360W. The 2600 should pull maybe 130W on the high end. You could always use a PSU calculator but seems like 750W would be enough with a high quality PSU. Lower quality I would bump the wattage. Could probably even get away with 650w if you're not overclocking. You can use the calculator here for a more precise estimate of power use https://outervision.com/power-supply-calculator

RM 750 would be a great choice imho.

ok thats what i ultimately wound up doing, on my way out of town friday i snagged the only RM750 left at worst buy, its in the system currently. surprisingly much quieter than the evga 450gm that was in there.

I think his new video card, the end game, is an RTX 4090. 650W is fine with a 3070Ti, but not the 4090.

well i was going to go 4080 how ever with all their BS and back and forth, plus the cancellations on 4xxx and supposed new additions to 3xxx i think i'm just going to stay away from nvidia until they come back down to earth. the 3070ti should suit my little system for a while, i'm still going to try and get my hands on an intel card and i think i'll wait and see what RDNA2 brings along.

if they can compete RDNA2 could really take advantage of what ever the hell nvidia is doing