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SLi for two vcards... quick and dumb question that kept me up at night. - Page 2

post #11 of 14
Thread Starter 
Quote:
Originally Posted by EPiiKK View Post

Can you tell us which cards you exactly have?
It will give us more insight into your situation and better results thumb.gif
General rules of SLI and CF are listed above tho, you should be able to figure it out yourself. If not then just ask wink.gif

Wow, sorry... I just came back into this thread after a recent upgrade that was related.

The vcard is a MSI 560GTX Twin Frozr (1gig)

AMD you can crossfire cards from the same series.

So anything in 500 series is my only chance?

It seems to me that there are like 6 different "brands" of the same card.. Nividia, EVGA, MSI, and a few others I dont know.
What happens then?

The chances of me finding another 1 gig here exactly by Msi even though they are right here in Taipei is probably impossible... they get rid of "old" technology so fast over here from their offerings.
The lowest will be 2 gig... and probably 600 series. ( based on the latest flyer of offering I read in the computer area.)

of which you are saying this second card will just be limited to doing math for phys and not really load balancing? SLI is only for people with holes in their wallets I think.
But if I do find a 500 series I will dive on it, Maybe. I would love to know exactly how much stress psy-x (spelling) puts on multi or single vcards.
post #12 of 14
I read something in here about v-ram.
You can (at least, i know it was possible a while ago) use a gtx560 1gig card in SLI with a gtx560 2 gig card. The one with 2 gig wil just scale its memory down to the same amount of the one with the smaller ram pool.
Same happens with clock speed, memory speeds. The fastest card wil always match the slower card's speeds.

But with Nvidia you'll always need the same chip : gtx560 + gtx560, titan + titan, and so on.
With AMD its different. The series need to match : 7950 + 7950 is possible, 7950 + 7970, 6750 + 6770 and so on.

At least, it used to be like this, don't know if this has changed or not recently but i doubt it has.
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<| SkyWareZ |>
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Clevo P170EM
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post #13 of 14
It has not changed, you are spot on.
post #14 of 14
Quote:
Originally Posted by Yungbenny911 View Post

Nope, they will not run in SLI, they will only show up as two different cards, one primary card, and one secondary card that could be used as dedicated PhysX card.
Incorrect, you can use two matching cards with different amounts of vram just fine.

You will be limited to the lowest amount, just like you can run a factory OC card with a reference clocked card and they will just run at the slower speed.
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