5770 Crossfire with 6770?

No can do, my friend. Not possible. Sorry.

Yes you can. The 6770 is just a rebranded 5770.

Edit: Proof. Start with card one being the 6770. You could even CF it with a 5750...

http://sites.amd.com/PublishingImages/Public/Graphic_Il...

not possible crossfire possible with two identical same models however their series are different.

really, can you show any pictures.

Not according to the crossfire chart anyway http://sites.amd.com/PublishingImages/Public/Graphic_Il...

CrossFire can be implemented with varying-GPU cards of the same generation (this is in contrast to Nvidia's SLI, which generally only works if all cards have the same GPU). This allows buyers who have varying budgets over time to purchase different cards and still get the benefits of increased performance. With the latest generation cards, they will only crossfire with other cards in their sub series. For example, GPU in the same series can be crossfired with each other. So a 5800 series GPU (e.g. a 5830) can run together with another 5800 series GPU (e.g. 5870). However GPU's not in the same hundred series cannot be crossfired successfully. (e.g. a 5770 cannot run with a 5870)

see - http://en.wikipedia.org/wiki/AMD_CrossFireX - for more information

If anyone bothered to read my reply, the 6770 is a 5770. AMD didn't need to release an updated card due to Nvidia not coming out with anything to challenge it. The 6750 is also just a 5750. Rebranding, just like the 9800GT being an 8800GT.

We understand it is a re-branded 5770... but unless you have PROOF that they can crossfire; I'm not going to tell this guy it's possible... then when he buys one and attempts it, it fails.... you can... I won't. Maybe it will work... maybe.

I stand corrected! Thanks for the enlightenment!!

And there is the proof.... thank you. Now we can tell him it is possible... Enjoy!

I did read your reply, and that is my understanding also, but what I wanted to check. It is interesting on the chart that both you and robjordy linked to, and as you mentioned in your post. That going by that chart if you start with the 6770 card it says you can crossfire it with a 5770, but if you start with the 5770 it does not say that you can crossfire it with the 6770. A goof on AMDs part?

I edited my first post with the proof. Click the link. See that blob of yellow in the upper right? That's AMD saying the 6770 can CF with the 5770 or 5750 as well as the 6770 and 6750.

Edit:



Not sure. It might be for this to work you need the 6770 in the card 1 slot. In which case the graph is correct. Or they felt like not duplicating the info...

Huh ? Wtf, didn't see that  

1+ for 4745454b

I check the web from anandtech forums, http://atforums.mobi/msg.php?threadid=2172478&catid=8&r...

you have to put the 6770 in 1st card slot.

That's why he's the addict   , still learning myself . . .

It works quite well if you copy the bios from the 6770 and over write the bios to the 5770. This will turn the 5770 into a 6770. We did this on 2 refrence model cards. Both cards with the cooler removed looked the same.

I used these instructions as a guide.
https://forums.ebuyer.com/showthread.php?63594-Flashing...

No, not a goof. The 6770 has to be card 1 because it is aware of the 5770. The 5770 can't be card 1 because it is not aware of the 6770.

Wow, cards that are aware, heavy stuff.

No, serious, why is that anyway ?

Think of it as backward compatibility vice forward compatibility. Make sense now? One is easy to do, the other nearly impossible.

Ah, yeah, chrystal. Thank you.

That would make things rather more complicated for no conceivable gain. I'm not against BIOS flashing since I've done it many times to my 5850s, but I just don't see the point in this case.

It was the only way we could get cross fire to work. It also unlocked the HDMI 4.1 or whatever the 6770 offers.

I guess the only advantage would be the driver would see the two cards as completely the same. In this case both cards were the same manufacturer, and both were refrence boards.

In practice, flashing another bios on your card is not really a good idea, but it was fun.

Hmm, interesting. Well, if it works it works!

so i can bridge a 6770 flex edition and a reg 6770 then

Yes. Not an issue.