• Crossfire with 2 different video cards (same series)?
    15 replies, posted
I am going to buy a ATI HD 5770 graphics card. I was wondering if you could crossfire it with a lower end (not the same) card, say like a Radeon HD 4670, for example. I have googled this but I do not get a straight forward answer.
As long as the first and second numbers are the same, they can work. You can XFire a 5750 and a 5770, or a 5770 and a 5770. A 4670 would not work. The only except to this rule is 5870 and 5970.
Okay thanks.
No Problem.
I'm pretty sure you need the same amount of VRAM on each card, otherwise it disables a certain amount of the VRAM to match the lowest amount.
Oh wow, I didn't know that. Thanks for explaining that, anikilol.
Also, both cards will be set to match their clocks, i.e. the faster card will work slower to match the worse card.
I have a question. If the graphics card is the same but from different manufacturers. For example, can a Asus ATI Radeon 4870 1GB crossfire with a Sapphire ATI Radeon 4870 1GB?
[QUOTE=Nexor;20212474]I have a question. If the graphics card is the same but from different manufacturers. For example, can a Asus ATI Radeon 4870 1GB crossfire with a Sapphire ATI Radeon 4870 1GB?[/QUOTE] Yeah, you can Just make sure the clock speeds are the same, or it'll revert to the slower one.
OP You can crossfire 2 different cards but I do not think you can crossfire 2 different manufacturing types so I do not think a 4670 would work with a 5000 series card.
What about Nvidia SLI? could i put a 8800GT and a 8500Gt in SLI?
[QUOTE=Themage;20219094]What about Nvidia SLI? could i put a 8800GT and a 8500Gt in SLI?[/QUOTE] The situation is completely different with nvidia.
For Nvidia, they have to be the SAME EXACT CARD, not sure about brand.
[QUOTE=anikilol;20220130]For Nvidia, they have to be the SAME EXACT CARD, not sure about brand.[/QUOTE] No, it doesn't have to be the same brand. One of my systems has both a PNY 8600GT and an EVGA 8600GT in them.
For NV. it doesn't have to be the same brand, but the card configuration must be the same. Different manufactures may set the clock speed differently, make sure you check that as well.
[QUOTE=anikilol;20220130]For Nvidia, they have to be the SAME EXACT CARD, not sure about brand.[/QUOTE] Unless you feel like wasting a day flashing card bios over each card so it thinks they are the same, its how some people managed to SLI a 9800 with a 8800 (a fp member runs this rig) and a 7300 with a 8600 (college tutors backup rig, runs like shit apparently). Pointless but possible. Crossfire is better than SLI anyway.
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