Limit GPU power consumption

[Dereek69]

A friend of mine got a 750ti. But since he have a 250w power supply and a q9400, i don't think it's enough. So i was asking if you know a way to limit the power consumption of the GPU.

[Bad 💀 Motha]

250-300 watt PSU is all u should need for 750 / 750 Ti
If there are going to be PSU issues (like not being enough) u can just test this by putting a full load on your CPU/GPU and see if the system has issues; like random hard resets occurring becaues of high loads for example.

Run Prime95 + FurMark at the same time to stress both CPU & GPU at same time. If it survives for 10-15 mins; then u should be good to go.

[76561198259023373]

He only has 180w max on the 12volt rail, which includes the CPU.

That means he is looking at 65-75w graphics cards.

[Andrius227]

Publicado originalmente por Dereek69:

Can't he get some sort of gt730/740 and be OK?

The thing is, gt730 or gt740 use almost the same amount of power as the gtx750ti.

GTX750ti needs 300w psu
Gt730 needs 300w psu
Gt740 needs 400w psu

Your friend just needs to upgrade his psu, they are quite cheap. Also gt730 would be more than 3x slower and would be terrible for gaming. Just not worth it. He should keep the gtx750ti, then save up a few bucks and buy a new psu so he can use that card.

[76561198259023373]

I've looked it up and the GeForce GTX 750 Ti is only a 60 watt card, so it should work with 180 watts max on the 12 volt rail.

Leaving 120 watts for the CPU and other components.

It'll cut it close, but it 'should' work.

[Alexalmighty]

Publicado originalmente por Joey Joe Jo:

I've looked it up and the GeForce GTX 750 Ti is only a 60 watt card, so it should work with 180 watts max on the 12 volt rail.

Leaving 120 watts for the CPU and other components.

It'll cut it close, but it 'should' work.

i really dont think so he doesnt have enough power

[Dereek69]

Using PSU calculator a q9600+750ti the result is about 13a on the 12v rail, can i trust it? Because if it's true it should work. Another thing, if i run the stress test could something get damaged?

[Alexalmighty]

Publicado originalmente por Dereek69:

Using PSU calculator a q9600+750ti the result is about 13a on the 12v rail, can i trust it? Because if it's true it should work. Another thing, if i run the stress test could something get damaged?

normally the system will shut itself down to stop any damages but i really dont think that psu will give enough watts they are never 100% efficient

[˜lokkandload˜™]

If it's Dell and a SFF model, like a mini or desktop model, then their power supplies are not universal in nature, and next to impossible to upgrade. The 750ti, would be the highest powered card I can even think his system might even support. The GT 730 or 740 is a huge drop in performance from a 750Ti, but may be all he can use.

[˜lokkandload˜™]

In that case chose DDR bandwidth over total VRAM. a 1 GB GDDR5 card is more powerful than a GDDR3 2 GB card....plain and simple.

[upcoast]

Just a suggestion, if cash is that strapped maybe hit the recycle depots and scrounge up a 400w to 500w psu on the cheap or free if the case is atx compliant.

[Dereek69]

Publicado originalmente por upcoast:

Just a suggestion, if cash is that strapped maybe hit the recycle depots and scrounge up a 400w to 500w psu on the cheap or free if the case is atx compliant.

That's a great idea. Does it have to be a good power supply or also a crappy 400w power supply can support that system?

[Meurock460]

Publicado originalmente por Dereek69:

Publicado originalmente por upcoast:

Just a suggestion, if cash is that strapped maybe hit the recycle depots and scrounge up a 400w to 500w psu on the cheap or free if the case is atx compliant.

That's a great idea. Does it have to be a good power supply or also a crappy 400w power supply can support that system?

Doesn't need to be the greatest, but don't go for the worst one you can find either. Also, you don't want anything ancient either with no sata connections.

Your best chances at recycling depots is to go through old OEM PCs and look for something like a Delta or FSP power supply. Those were semi decent as far as OEM power supplies go.

300w (higher if you can find one) should be enough.

[Bad 💀 Motha]

If u have to go the cheap priced route, even a Corsair CX-430 would be more than enough; CX 430 or 500 watt PSUs are both under $50 range. Sometimes found for as little as 20-30 $ depending on the site/store.

Don't buy some generic no-name crap. Corsair CX series are fine for lesser demanding hardware, like what your friend has. And good enough to still be able to use GPUs like GTX 960 and such without issue.

[upcoast]

Fortron aka FSP also makes Sparkle 400pn which was a good oem in its' day , the basic evga, seasonic, antec, xfx and the good enough ones just do some research and keep an eye on the +12 amps the simple formula is amp x 12 = watts.

[76561198259023373]

voltage x amps = watts (basically).

Voltage on the 12v rail is 12 (obviously, but there are other lines from the PSU. 3.3v, 5.0v, etc.).