Club3D HD7870 Royal King 2GB & Club3D HD 7870 JokerCard 2GB in Crossfire?

Hardware GPU
1

Hi folks, I got a Club3D HD7870 Royal King 2GB from a friend of mine, and was looking for a similar card to use in a crossfire configuration.

I found a Club3D HD 7870 JokerCard 2GB, used online.

Can these 2 cards function in a crossfire setup?
If yes, how well will they work together?

Any help is much appreciated :)

As far as i can see the Royal King card is the fastest, so this should be the primary card I guess.

The motherboard is this: http://www.asus.com/Motherboards/CROSSHAIR_IV_FORMULA/overview/

External links:

http://www.club-3d.com/index.php/news/message.en/items/radeon-hd-7870-jokercard-incredible-value.html

2

Yes.

The faster card will clock down to match the slower one.

It'll work just about as well as any other CF set up.

3

Not the case since the introduction of PowerTune in 2011. Crossfire cards operate on independent clock rates now.

1 Like
4

Thanks for the quick replies :)
So the two cards should be just fine?
Will the 2 different clock-speeds result in stuttering since the Poker King card is faster than the Joker card?
Or is the speed difference negligible?

5

I could have swore that my old 7970 downclocked when I crossfired it with a 7950. That was in 2012/2013. But maybe my memory is a bit hazy.

6

It should not have unless you did it manually. I can tell you with my 6900 quadfire setup, all cards can (and usually do) operate at different clockrates without issue.

7

I believe you. Perhaps I did clock them manually, or I just forgot what happened.

8

Nope you cannot crossfire these 2 particular cards.
Because they use a diffrent chip.

The 7870 is a pitcarn chip.
The 7870 joker card is a 7870Xt which is a Tahiti chip.

So nope its not possible.

9

Nope its not possible, see my post above.
The 7870XT is a totaly diffrent card then a normal 7870.
You can´t crossfire these 2 cards together.

10

Oh I didn't realize that was an XT.

11

Thanks for the info, I thought that AMD Crossfire was able to utilize different GPU's.
But they have to be the same chip? But the manufacturer can be different?

12

MisteryAngel is correct.

I have a 7870 XT which is a Hawaii Chip it can SLI (CFo) with-

7970
7950
7870 XT

Normal 7870 is a different chip.

Same GPU types can go together, ie, 7950, 7870 XT are binned or disabled 7970s.

13

Thats correct, but the 7870XT and 7870 are diffrent gpu´s.
7870XT is a shrinked down Tahiti chip.
7870 is pitcairn.