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6870 + GTS250 + 585 PSU ? (PhysX)

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November 25, 2010 7:51:24 AM

Ok so I'm buying a Gigabyte GA-EP45-DS3R Crossfire mobo soon and wanted to play around with PhysX purely for the fun of it.

Here's my PC spec:
Q6600 @ 2.93GHz
Gigabyte GA-EP45-DS3R Crossfire Mobo (soon to be anyways)
4Gb DDR2 @ 966Mhz
2x 500Gb HDD's
Gigabyte ATI HD6870 1GB
PhysX - Asus GTS250 DK 1GB
Gigabyte 585W PSU - GE-P585A-C2

Question - Is that PSU enough? I hear a lot that for crossfire setup's you need at least a 600W PSU. So not sure if the 585W will service.

Thanks
November 25, 2010 8:42:38 AM

I have a couple of 2x4pin molex to 1x6 pin pci-e converters. Just want to know if the Watt will service.

[Edit] Thanks for the link, didnt click on it at first. Im going through it atm.
Related resources
November 25, 2010 9:30:06 AM

Ok so by the looks for things with the Calculator this is definitely not going to work. Thanks very much for the link Cromedome. Seems ill have to upgrade my PSU to 700+

Although if i setup the Calc to my current setup it recommends a 637Watt (Minimum) which is a tad bit over exaggerated in my opinion.
November 25, 2010 1:11:06 PM

I'm running a i7 950 @3.7 GHZ, 6 GB mem, 5 HDDs, an optical drive, 3 case fans, and dual 5850's (@890/1220) on a Seasonic 650 watt P.S.

According to my 600 watt UPS I've not drawn over 480 watts yet during any part of Vantage.

Just my 2 cents.
November 25, 2010 1:58:33 PM

firebird said:
I'm running a i7 950 @3.7 GHZ, 6 GB mem, 5 HDDs, an optical drive, 3 case fans, and dual 5850's (@890/1220) on a Seasonic 650 watt P.S.

According to my 600 watt UPS I've not drawn over 480 watts yet during any part of Vantage.

Just my 2 cents.

That is impressive!

I think what ill do is when i get the motherboard ill do a little test run on my 585W PSU. Pop up a couple of heavy duty benchmark programs, play a PhysX game and see what happens. i know there's the slight chance i might just blow up my PC but i guess we will soon find out. If it restarts or goes blank ill just remove the PhysX card and let it be. Realistically the only time i should be stressing the PSU is while I'm playing a PhysX game that's utilizing the extra card.
a b U Graphics card
November 25, 2010 2:15:42 PM

Lian said:

Gigabyte 585W PSU - GE-P585A-C2

Question - Is that PSU enough? I hear a lot that for crossfire setup's you need at least a 600W PSU. So not sure if the 585W will service.

It might suffice, but it's not a 585w unit, it's an over-rated, lower quality 500w unit.
November 25, 2010 4:45:55 PM

delluser1 said:
It might suffice, but it's not a 585w unit, it's an over-rated, lower quality 500w unit.

How so?

This is absolutely no help to me at all if i don't know where you got this from.... Especially if i want to make an informative decision on my next PSU if it is indeed a 500wat PSU.
a b U Graphics card
November 25, 2010 5:05:34 PM

Gigabyte's low end units are "peak" rated, not continuous.
November 25, 2010 9:02:36 PM

Ok so from what I've read in local reviews you are very much correct on the Gigabyte PSU. Some even mention its a 460watt in actual fact. And there's no $%&$ing way I'm buying a new 700+ watt PSU for the same price as my new (second hand) mobo.... And i really don't think a 460watt will run my PC with the PhysX setup. Even if it does that is very much pushing it to the limits.

So was thinking of getting an additional 300Watt PSU for super cheap (if not free from a friend with a old PC lying around) and sticking the GTS250 solely on that? My PC isn't out in the open so not like anyone will even see it. I know its not the perfect setup but that should work right?

I'm very much a budget PC guy as PC's components are close to double the price they are sold for in US. Really cant afford a 700Watt.
a b U Graphics card
November 25, 2010 9:39:22 PM

You joke you might blow up your pc, but thats ok, then you want to make a informative decision. lol
You can't run 3 video cards on a questionable psu. That has only 1 6 pin connector.
Molex chains especially on cheapo psu's might effect power to your hard drives, or cause other problems. You don't want to do all that branchin/extensions to power 2 extra video cards. -
edit NM,
Your not planning on running 2 6870's are you. Just 2 video cards ?
Maybe 2 cards, but not 3.
November 25, 2010 9:44:09 PM

haha yes indeed, just planning to pop in my GTS250 for PhysX on a separate PSU so it will be completely independent on power.
!