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#1 strifus

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Posted 04 February 2012 - 03:57 PM

Just wondering something. I am considering an upgrade in the next few months. I was also considering SLI. I was wondering if it is possible to SLI dissimilar GPUs (eg, a 580 with a 570). its a newb question but its something i have never considered before till now because i bought a 570 about 6 months ago. Thanks in advance.
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#2 belal wow

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Posted 04 February 2012 - 10:53 PM

not possible SLI only works with same GPU but you can have a 580 a main card and 570 as physics card just an idea.
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#3 unco_tomato

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Posted 05 February 2012 - 12:42 AM

That is a massive waste of money. Buying a dedicated GPU for PhysX is a huge waste of money as it is a dead in the water project.

You can pair dissimilar GPUs of the same family under CorrsFire (AMD). For example, a 7970 and 7950 can be paired. Though a 7870 and 7970 cannot be paired.
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#4 TheSingularity

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Posted 05 February 2012 - 06:39 PM

That is a massive waste of money. Buying a dedicated GPU for PhysX is a huge waste of money as it is a dead in the water project.

You can pair dissimilar GPUs of the same family under CorrsFire (AMD). For example, a 7970 and 7950 can be paired. Though a 7870 and 7970 cannot be paired.


Thats interesting but I'm making an educated guess a 5870 wouldn't work with either the 7950 or 7970, unless you have the Hydra(Hydra? Or something like that was an article a while back in PCPP about it being developed in Israel and recently noticed on some motherboards the fact it had it added) chip in your motherboard, which I don't.
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#5 mattyamdfanboi

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Posted 05 February 2012 - 10:32 PM

it wouldnt work at all.. whether u had hydra or not. the architects r just too different.. thats why cant pair them other say 6950 and a 6850.. different GPUs different languages different everything.. they just cant talk atleast thats how i saw it
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#6 TheSingularity

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Posted 07 February 2012 - 03:17 PM

it wouldnt work at all.. whether u had hydra or not. the architects r just too different.. thats why cant pair them other say 6950 and a 6850.. different GPUs different languages different everything.. they just cant talk


atleast thats how i saw it


The original Hydra chip was supposed to make using even an Nvidia chip with an AMD chip possible. So it would have worked but from what I understand of it now it wouldn't.
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#7 unco_tomato

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Posted 07 February 2012 - 04:04 PM

Hydra could possibly work, but it's a pain in the arse really (some recent chips are better than the old ones though).

You need to pair the "hundred" numbers together for CFX. Example: 6950 and 6970 can be paired as they are both 6900's. 6850 and 6870 can be paired, as they are both 6800's.

5870 cannot pair with a 6870, (without a Hydra chip) as they are different generations. So you need to match the generation (the first number in the name sequence) with a matching "hundred" number in order to CrossFire.

Nvidia on the other hand require matching GPUs.
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#8 lemaster22

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Posted 20 February 2012 - 05:33 PM

just go a single card much easier whats wrong with the 570 unless you run stupendous resolutions

#9 Morgoth

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Posted 20 February 2012 - 07:39 PM

just go a single card
much easier
whats wrong with the 570
unless you run stupendous resolutions


Or ever want any form of antialiasing
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#10 nesquick

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Posted 20 February 2012 - 09:38 PM

If its the next few months wait and see what nvidia brings to the table, even if its nothing great HD7970 prices will have come down alot and you could just grab one of those.
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#11 gazman2k3

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Posted 29 February 2012 - 12:56 AM

yeah I remember when I had a gtx 480 card I grabbed a gtx 260 card and used it as a dedicated physx card,in the end I sold the 260 as it was a total waist of money,no real gains at all,sometimes for some reason my benchmarks were lower when using the 260 for physx.
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