can i crossfire a HD 4870 and a 4650?

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hofuldig

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#1 hofuldig
Member since 2004 • 5126 Posts
and how do you think the performance would increase? do the cards keep there individial clocks or will the fastest card downclock itself?
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Its_That_Guy

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#2 Its_That_Guy
Member since 2008 • 40 Posts
Nope. You can't crossfire 2 different cards. they have to be the same cards in all areas. Plus, those 2 graphics cards have dual GPUs, if I'm not mistaken, I believe that the 4870, is already crossfired with it's 2 GPUs.
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kunggustaf

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#3 kunggustaf
Member since 2005 • 883 Posts

Nope. You can't crossfire 2 different cards. they have to be the same cards in all areas. Plus, those 2 graphics cards have dual GPUs, if I'm not mistaken, I believe that the 4870, is already crossfired with it's 2 GPUs.Its_That_Guy

I thought Crossfire could be used between different cards while SLi could not. Am I wrong?:?

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hofuldig

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#4 hofuldig
Member since 2004 • 5126 Posts
Nope. You can't crossfire 2 different cards. they have to be the same cards in all areas. Plus, those 2 graphics cards have dual GPUs, if I'm not mistaken, I believe that the 4870, is already crossfired with it's 2 GPUs.Its_That_Guy
ur thinking Nvidias SLI
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hofuldig

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#5 hofuldig
Member since 2004 • 5126 Posts

[QUOTE="Its_That_Guy"]Nope. You can't crossfire 2 different cards. they have to be the same cards in all areas. Plus, those 2 graphics cards have dual GPUs, if I'm not mistaken, I believe that the 4870, is already crossfired with it's 2 GPUs.kunggustaf

I thought Crossfire could be used between different cards while SLi could not. Am I wrong?:?

well i know for SLI you gotta have the same 2 cards. but iv heard that from crossfire you can use 2 different cards at once. thats what i wanna try to make sure my Crossfire board has both lanes 16x by 16x
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stolmie1

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#6 stolmie1
Member since 2008 • 25 Posts

I belive the 4870 would downclock to 4650 best keep with the 4870 sell the 4650 and save for another 4870.

i would also recomend oc your 4870 using ati overdrive auto-tune.

just clocked my saphire 4870 to 840/1045

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hofuldig

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#7 hofuldig
Member since 2004 • 5126 Posts

I belive the 4870 would downclock to 4650 best keep with the 4870 sell the 4650 and save for another 4870.

i would also recomend oc your 4870 using ati overdrive auto-tune.

just clocked my saphire 4870 to 840/1045

stolmie1
well the 4650 is in another computer of min so no need to sell it. really it was just going to be a test (that i think im gonna do sience it seems no one really knows) And also i do have my 4870 overclocked to 850 GPU and 1000 memory
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Athonline

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#8 Athonline
Member since 2005 • 530 Posts
http://game.amd.com/us-en/content/images/crossfirex/CF_combo_chart_Nov08.jpg yes you can, but don't think it would give you perfomance increase
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Its_That_Guy

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#9 Its_That_Guy
Member since 2008 • 40 Posts

[QUOTE="Its_That_Guy"]Nope. You can't crossfire 2 different cards. they have to be the same cards in all areas. Plus, those 2 graphics cards have dual GPUs, if I'm not mistaken, I believe that the 4870, is already crossfired with it's 2 GPUs.hofuldig
ur thinking Nvidias SLI

I read on the ATi website, about ATi Crossfire, that you can only cross 2 of the same graphics/video cards.

Plus, I'm not a fan of Nividia. ATi is my card.