Power supply thought experiment

**hannibal** · 12-13-11, 11:52 PM

Hi all,

I am thinking about a 6870x2 setup for a friend of mine, he wants physX as well and he already has a GTS450 so its not going to cost him anything to add it. He already has a 750W Silencer power supply that he has been using for years. So the question is with the GTS450 only working for PhysX games can the 750W psu handle this setup?

-H

**rush2049** · 12-14-11, 06:08 PM

What processor and is there going to be any overclocking at all?

I do not know how power hungry the 6870 cards are, but I know for my setup:
gtx590 (2x580's) : overclocked to 650mhz
gtx 275 for physx : stock
Phenom II x6 1055T : overclocked to 4ghz
6x hard drives

I was pushing near 1100 watts at the peaks of demand. On average I sat at 550 watts though.....

So take those stats how you will.

**RhysJD3** · 12-15-11, 05:28 PM

Can you do physx when running ATI main crossfire and using an nvidia card? Just curious.

**DJ Ms. White** · 12-15-11, 05:35 PM

Yes

**hannibal** · 12-15-11, 06:10 PM

Originally Posted by RhysJD3

Can you do physx when running ATI main crossfire and using an nvidia card? Just curious.

I do, which is why my friend asked me to build this system for him.

-H

**RhysJD3** · 12-15-11, 09:57 PM

I've got an nvidia 570 and 260 GTX for physx. I gave my other 260 GTX to a friend so he could play BF3. You guys have any recommendations for the cheapest yet fully capable nvidia card for physx? I'd like to give/sell him the second one so he can do SLI with them for better fps.

**RhysJD3** · 12-15-11, 10:03 PM

Sorry, getting this one off topic. I have a silencer 650 running:
Nvidia 570
Nvidia GTX 260
6 x 1 GB ram sticks
Intel 920 processor
2xRaptor 10,000 RPM drives
Optical drive
2x64 GB solid states...
5 case fans

I've had absolutely no issues with it or stability. PC Power and Cooling makes some quality PSU imo.

**hannibal** · 12-16-11, 12:09 AM

You can get a GTS 450 for about $100.

-H

**rush2049** · 12-16-11, 03:45 PM

for physx any more than a gtx 275 is a waste. Running the recent batman games (best use of physx I have seen) it never went over 75% utilization.

**HeavyG** · 12-17-11, 09:51 PM

I have a Sparkle GTS 450 single slot card that I use for PhysX. I paid a bit more as the single slot card is actually more than the regular dual slot cards. I also think the GTX 260 Razor editions make good PhysX cards, but good luck finding one. They are also single slot, which helps if you are already running an SLI/Crossfire system. Having the extra space is nice.