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[Snippezkiller]

My friend asked me this question and i think its a good question,
Since i use 2 the same cards for crossfire i cant tell,

But he asks if he puts in a for instance 7750 with a 7850, What would happen to the performance,
Since the 7750 is a slower card with a less bitt interface.

[jppk1]

He cannot. Only cards with the same chip can be crossfired, f. e. a 7750 and a 7770.

Spoiler:

If he does two different cards in CF, make the "first" card the most powerful one in case something cannot utilize both GPUs.

[Draconbane]

Snippezkiller, on 23 December 2012 - 02:19 PM, said:

My friend asked me this question and i think its a good question,
Since i use 2 the same cards for crossfire i cant tell,

But he asks if he puts in a for instance 7750 with a 7850, What would happen to the performance,
Since the 7750 is a slower card with a less bitt interface.

Now that is something that I always wondered.

[Snippezkiller]

jppk1, on 23 December 2012 - 02:25 PM, said:

He cannot. Only cards with the same chip can be crossfired, f. e. a 7750 and a 7770.

Spoiler:

If he does two different cards in CF, make the "first" card the most powerful one in case something cannot utilize both GPUs.

For instance the cards have the same chips but one is slower what will happen?

[jppk1]

Snippezkiller, on 23 December 2012 - 02:29 PM, said:

For instance the cards have the same chips but one is slower what will happen?

Basically the same things that would happen with two same cards, but the performance increase and micro-stuttering are slightly different.

[Snippezkiller]

Ke thanks for the information, Which cards are able to run crossfire with his single HD7850

[jppk1]

Snippezkiller, on 23 December 2012 - 02:36 PM, said:

Ke thanks for the information, Which cards are able to run crossfire with his single HD7850

HD 7850s and HD 7870s, like in the chart I linked.

[Snippezkiller]

Not working for me

[cam51037]

Snippezkiller, on 23 December 2012 - 02:55 PM, said:

Not working for me

Like he said, it has to be from the same family.

Ex. a 7800 card can ONLY crossfire with another 7800 card. Same with 6900 series, 5800 series, and so on.