Question Running rx 9070xt on 650watt psu??

[simo311]

As the title says, what if I try to run a rx 9070 xt on a 650watt psu? What would happen?
I have a ryzen 5 9600x which only draws 88watt peak, will be still too much? I guess so...
What If I undervolt the gpu to fit more properly the psu max wattage?
I've read of people undervolting the card to ~25% and still getting excellent performance out of it with only 2/3% loss...
Can you confirm it or is it better to buy a new psu right away and not even worth to try?
Thanks a lot!

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System: Windows 11
CPU: AMD Ryzen 5 9600x
Memory: CORSAIR VENGEANCE DDR5 32GB (2x16GB) DDR5 6000MHz
Disk: Samsung 980 500 GB SDD + x2 Seagate BarraCuda 2000 GB HDD
Display Adapter: AMD Radeon RX 5700 XT 50th Anniversary (8.00GB)
Motherboard: Gigabyte B650 EAGLE AX
Power Supply: Corsair TX650M Serie TX-M

 

[ak47jar3d]

Its 360w load at maximum. You cpu is very efficient. Go for it.

Edit: That wattage is based on my own 9070 xt hellhound.

 

[simo311]

Its 360w load at maximum. You cpu is very efficient. Go for it.

Edit: That wattage is based on my own 9070 xt hellhound.

The card I wanted to buy is a rx 9070 xt asrock steel legend, does it draw more watt or?
Also, why I read online that it is really not raccomanded to do? 360 w max seems ok with a 650w psu...

 

[VizzieTheViz]

A higher wattage psu is usually recommended for two reasons:

1. Spikes in power draw that are temporarily quite high and (and I guess this is the most important one)

2. there are a lot of crap psu’s out there that will die if they need to work too hard for too long so AMD recommends higher wattage psu’s than strictly necessary so that people with a crappy psu at least have some headroom.

Your corsair psu is a pretty solid psu, I’d expect it to be able to handle a 9070xt, especially if you under volt it a little.

 

[simo311]

A higher wattage psu is usually recommended for two reasons:

1. Spikes in power draw that are temporarily quite high and (and I guess this is the most important one)

2. there are a lot of crap psu’s out there that will die if they need to work too hard for too long so AMD recommends higher wattage psu’s than strictly necessary so that people with a crappy psu at least have some headroom.

Your corsair psu is a pretty solid psu, I’d expect it to be able to handle a 9070xt, especially if you under volt it a little.

I would eventually change it to an 750 watt, maybe in few months from now, I've found pretty good 750 PSU for less than 100€
How much should I undervolt the gpu to be sure nothing bad will happens? 25%?

 

[SyCoREAPER]

I would eventually change it to an 750 watt, maybe in few months from now, I've found pretty good 750 PSU for less than 100€
How much should I undervolt the gpu to be sure nothing bad will happens? 25%?

Just don't be cheap. "Pretty Good" and "less than 100€" for a PSU rarely if ever part of the same sentence. Remember you get what you pay for, cheap PSUs make sacrifices somewhere which could make your entire PC be the sacrifice in turn.

Undervolting is a bandaid for insufficient or passable power supplies. Undervolting is meant to extend the life, reduce heat or reduce power consumption for power bill reason (or all of the above). Not to protect from power spikes. Let alone you're relying on software to control the power flow. A blip or lockup from the system and then problems.

Post the PSU you're looking at and people can give some feedback. I can't confirm this but for example Microcenter told me Corsair is what they see returned or warrantied most. It doesn't mean it's bad, just what they see most failures on. That also might not be everyone's experience.

TLDR; Don't be cheap. Get a proper power supply or be ok with that you could eventually damage components.

 

[simo311]

Just don't be cheap. "Pretty Good" and "less than 100€" for a PSU rarely if ever part of the same sentence. Remember you get what you pay for, cheap PSUs make sacrifices somewhere which could make your entire PC be the sacrifice in turn.

Undervolting is a bandaid for insufficient or passable power supplies. Undervolting is meant to extend the life, reduce heat or reduce power consumption for power bill reason (or all of the above). Not to protect from power spikes. Let alone you're relying on software to control the power flow. A blip or lockup from the system and then problems.

Post the PSU you're looking at and people can give some feedback. I can't confirm this but for example Microcenter told me Corsair is what they see returned or warrantied most. It doesn't mean it's bad, just what they see most failures on. That also might not be everyone's experience.

TLDR; Don't be cheap. Get a proper power supply or be ok with that you could eventually damage components.

Ok ty, but overall do you raccomend me to try running a Rx 9070xt with 650w PSU with my current configuration (even if it's only for some months before I'll buy a new PSU) or it is too risky and not even worth trying?

 

[SyCoREAPER]

Besides your specs listed you have to consider things like if you have an AIO, number of fans, LEDs, any accessory cards, peripherals, etc.. you'd really need to look up exactly everything you have and add it up.

The things above seem miniscule but add up very quickly. At 304w for the GPU (recommended is 700w PSU) and not knowing everything else in your case calculated out, personally I would get the GPU if that's the one you want/have, try and contain your excitement until you get a higher wattage PSU.

With power requirements constantly going up, 1000w is really what I recommend but you should be ok with the 750w you want to buy, provided it's a good brand and you don't upgrade often.

So no, personally I would not risk it. Even if it mathematically comes out ok, that's assuming your current PSU's age/hours, is 100% working at factory spec, no issues now or while running it until the new one.
Not worth the risk IMO. Others may see it differently which is their right but too many unknowns.

 

[ak47jar3d]

The card I wanted to buy is a rx 9070 xt asrock steel legend, does it draw more watt or?
Also, why I read online that it is really not raccomanded to do? 360 w max seems ok with a 650w psu...

It will be similar as amd power limits the card. So 360 is the arbitrary limit.

 

[Third-Eye]

The card may run on the 650watt PSU, but the transient power spikes from the card may push it above the PSUs over current protection and cause it to shut off the system.

750-850 watt would be a better starting point, but if you really want to run the card before getting a new PSU, you might possibly need to decrease the cards power draw through lower power limits, undervolting, and underclocking.

 

[Hardergamer]

My build: 9800x3d, 9070 xt, MSI x870e, 3x MVMe drives, AIO 360, 11x 120mm RGB fans, and is powered by a 2023 (Black, light Grey label. NOT Orange) TX650m, Total system usage at the wall is 380w while gaming at 4k, and uses just under 400w with transient spikes of 442w max in 2 weeks of benching and gaming, this is CPU/GPU max core benching with AIDA64, Prim95 (small) etc, both the CPU and GPU have a negative 20 set, CPU set in the bios curve optimizer, and the GPU in Adrenaline, (GPU power board stock at 0, but lowering this with bring GPU power down to 220w, making total PC usage around 300w while gaming), But before -20 uv. my system was using 10-20w more max.

Also, I'm an electrical engineer and use my Fluke multimeters/oscilloscope (Fluke 190-504 gen 3) for all testing, along with a Victron Smart shunt (all logged) As I generate and store my own power and sell to others.

Corsair has a 2x transient rating on this PSU, so 1300w (1.3KW) for spikes, this is why I know it's safe.
This has been tested in this group, which is why this PSU is a top-rated one, as long as it doesn't have an orange label, or is older than 4/5 years.

If you are really concerned buy a simple plug-in wall-power-meter/monitor, a good one like a "WATTMAN" or any good rated one on Amazon costs just £10-20, as you really don't need to worry about transient spikes of 400%+ as if they happen you have much bigger problems.

Ps, I don't recommend using an oscilloscope without a good understanding of mains voltages.

 

[simo311]

My build: 9800x3d, 9070 xt, MSI x870e, 3x MVMe drives, AIO 360, 11x 120mm RGB fans, and is powered by a 2023 (Black, light Grey label. NOT Orange) TX650m, Total system usage at the wall is 380w while gaming at 4k, and uses just under 400w with transient spikes of 442w max in 2 weeks of benching and gaming, this is CPU/GPU max core benching with AIDA64, Prim95 (small) etc, both the CPU and GPU have a negative 20 set, CPU set in the bios curve optimizer, and the GPU in Adrenaline, (GPU power board stock at 0, but lowering this with bring GPU power down to 220w, making total PC usage around 300w while gaming), But before -20 uv. my system was using 10-20w more max.

Also, I'm an electrical engineer and use my Fluke multimeters/oscilloscope (Fluke 190-504 gen 3) for all testing, along with a Victron Smart shunt (all logged) As I generate and store my own power and sell to others.

Corsair has a 2x transient rating on this PSU, so 1300w (1.3KW) for spikes, this is why I know it's safe.
This has been tested in this group, which is why this PSU is a top-rated one, as long as it doesn't have an orange label, or is older than 4/5 years.

If you are really concerned buy a simple plug-in wall-power-meter/monitor, a good one like a "WATTMAN" or any good rated one on Amazon costs just £10-20, as you really don't need to worry about transient spikes of 400%+ as if they happen you have much bigger problems.

Ps, I don't recommend using an oscilloscope without a good understanding of mains voltages.

yes it has Black, light Grey label, not the Orange one, but i bought it in may 2020, so its kinda, old?
so i should lower the gpu draw to 220w? how much will it affect performance?
p.s. as of now im playing in 1080p but ill might switch to 2k eventually, does it affect the power draw?

 

[ohio_buckeye]

Some say it will run, and it may, personally I’d consider upgrading the psu as soon as you are able. I personally always like to have some headroom.