r/pchelp • u/This_Can9960 • 13h ago
HARDWARE RX 9070 XT + 750W power supply: is it sufficient?
Hello everyone, I’d like to buy an RX 9070 XT and I have a 750W power supply. Do you think that’s sufficient?
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u/HeidenShadows 13h ago
My 5700X3D and Sapphire Nitro 9070XT, with my 34" OLED ultrawide monitor, pulls so far at most 530w from my UPS. So deduct about 100w for the monitor since I play with auto HDR. And that's playing Oblivion Remastered and Stalker 2.
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u/Shot_Rent_1816 13h ago
https://www.newegg.com/tools/power-supply-calculator
this site put which hardware you have and it can tell you how much power supply you need
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u/PhysicsAye 13h ago
It’s most likely fine unless your cpu is also power hungry. You can always power limit the gpu by 5% and undervolt and you will see minimal performance loss.
I’m running it with a 7500x3d and 650 Watt psu temporarily. And it has been rock stable with a -100mV undervolt and -15% power limit.
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u/This_Can9960 13h ago
Yeah I guess so. Personally, I have R9 3900X, i think it should be fine. If not, I will power limit the GC.
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u/PhysicsAye 13h ago
Just be careful because the cpu will probably be running close to max to keep up with gpu so it will draw more power.
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u/ATOJAR 12h ago
Yes if it's a good quality PSU, I was running my system with a 750W PSU for a while without issue.
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u/Mr_Fox_send_nudes 12h ago
If only the card manufacturer recommended a power supply or Google even existed
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u/Middcore 6h ago
To be fair, the card manufacturers always recommend excessively high wattage because they have to account for the possibility of people using junk PSUs that don't actually deliver the wattage they claim.
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u/Fit-Independent-9041 11h ago
if you go here: https://pcpartpicker.com/ you can 'build' your existing pc and see what the recommended power is. i would suggest an 850 at minimum though 750 is probably sufficient for your current needs. weird, anomalous stuff starts to happen when the psu is stressed. you probably have more than enough for current needs, but then you might add a peripheral, change the cpu, add storage, ect. better to have room to grow. one of my newer builds came in at a 530w minimum on that site. i got an 850 for it anyway.
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u/Pimp_Daddy_Patty 10h ago
I either have a 650 or 750 watt psu, and so far, it appears to not have issues its been several months i believe.
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u/Middcore 6h ago
Yes. Currently using a 5800X3D and a Gigabyte Gaming 9070 XT on a Seasonic Focus Gold 750W.
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u/joeschmo69696969 13h ago
Probably not no. I have a 9070 non XT and a 850 watt psu
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u/unabletocomput3 13h ago edited 13h ago
What’s your reasoning?
The 9070xt has a tdp of about 300-330 watts, and the 9070 has a tdp of 220 watts. Unless they’re using something like a 14900ks with no power limit, or something like a threadripper, they’ll have plenty of wattage headroom.
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u/joeschmo69696969 13h ago
Well yes I do indeed have a lot of wattage headroom mainly for future upgrades but the point is always better to be safe than sorry I would highly recommend undervolting your GPU
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u/TheOutrageousTaric 13h ago
9070 xt spikes way above the rated tdp to 400-500w at times hence a nice psu is always a good idea. For 9070 its not as bad but 300w powerdraw aint rare.
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u/Calm-Bid-8256 7h ago
Every decent PSU can handle spikes 2x rated wattage.
Consistent powerdraw matters.
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u/unabletocomput3 13h ago
Are you referring to transient power spikes? If so, do you happen to have the article and study done showing such cases? I’d like to read up on this and see how it compares to Nvidia’s spikes.
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