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Crossfire different branded 5770?

Saxon

Saxon

Saxon

Associate
Joined
10 Jan 2007
Posts
134
Hi,

Am I right in thinking it will be fine to crossfire the following cards?

VTX ATI Radeon HD 5770

And

Asus ATI Radeon HD 5770 CuCore?

Cheers
 
Doesn't matter if they are both reference or not providing they are from the same series, any 5 series cards will crossfire. You could even do 5870 with 5770 if you wanted. :)

Back in the day when the 3 series cards were about I had 3870 and 3850 which for some reason gave me better scaling than 2x3870 that I had later on.
 
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Nice, thanks all.

Would there be a major difference between a 5770 / 5750 Crossfire compared to a 5770 / 5770 crossfire?
 
VinceB1 said:
Doesn't matter if they are both reference or not providing they are from the same series, any 5 series cards will crossfire. You could even do 5870 with 5770 if you wanted. :)

Back in the day when the 3 series cards were about I had 3870 and 3850 which for some reason gave me better scaling than 2x3870 that I had later on.
Click to expand...

You can't do a 5870 and 5770.
They have to be the same Sub series 57XX/57XX 58XX/58XX.

My point to the reference thing came with a retort to the clocks, if one is clocked a little higher etc by default, there's been notice of complications.
 
Going by my old 3870&3850 to 3870&3870 you would be hard pushed to see any real differences. In fact there were several times when the combination of 50&70 did better than the 2x3870.

I couldn't begin to explain why, but would say that as a general rule of thumb stick with 2 cards with the same core, that way they can run at the same clocks with the same shaders count etc. This way you are likely to have less problems.
 
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Martini1991 said:
You can't do a 5870 and 5770.
They have to be the same Sub series 57XX/57XX 58XX/58XX.

My point to the reference thing came with a retort to the clocks, if one is clocked a little higher etc by default, there's been notice of complications.
Click to expand...

I have a feeling that it is possible to put 58 with 57 but is an unsupported configuration. ATI's site says it wouldn't work but a quick google says it may well work.

Spose this is one I would have to try myself.
 
Martini1991 said:
It would be pointless.
The 5870 would be cut to a 5770. It'd be a 5770 crossfire.
Click to expand...

You sure? I thought crossfire now kept the original clocks on both cards and doesn't down-clock the faster. SLI I know does down-clock.

EDIT: Had a look on the net about this, and it seems that lots of people are talking **** about something they know nothing about as usual, and there's lots of misinformation out there.

It was my belief that as of the 5xxx series cards (and maybe some cards before this), that hybrid crossfire would work if the cards have different frequencies, and also that if the cards are the same model (regular crossfire) the frequencies of each card would be preserved, but workload would be different between a stock and overclocked model.

Can anyone categorically confirm what really happens here?
 
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Crossfire using different cards within the same series works without downclocking the faster card to the speed of the slower card. So you can crossfire any 58xx series cards (5830,5850, 5870 and 5970) or and 57xx series cards (5750 and 5770). This review clearly shows the step up in performance when going from crossfire 5750's to 5750+5770 and finally crossfire 5770. If the faster card was downclocked the 5750+5770 setup would perform identically to the crossfire 5750 setup but it doesn't, instead it sits in the middle of the other more usual configurations.

http://www.xbitlabs.com/articles/video/display/asus_eah5770-powercolor_pcs_hd5750.html
 
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alexhull24 said:
You sure? I thought crossfire now kept the original clocks on both cards and doesn't down-clock the faster. SLI I know does down-clock.

EDIT: Had a look on the net about this, and it seems that lots of people are talking **** about something they know nothing about as usual, and there's lots of misinformation out there.

It was my belief that as of the 5xxx series cards (and maybe some cards before this), that hybrid crossfire would work if the cards have different frequencies, and also that if the cards are the same model (regular crossfire) the frequencies of each card would be preserved, but workload would be different between a stock and overclocked model.

Can anyone categorically confirm what really happens here?
Click to expand...

I never said they downclock.
But you'll lose the shaders.

But you can't crossfire a 5870 and 5770 to begin with, I'm saying if you could, you'd lose the shaders.
 
JeffyB said:
Crossfire using different cards within the same series works without downclocking the faster card to the speed of the slower card. So you can crossfire any 58xx series cards (5830,5850, 5870 and 5970) or and 57xx series cards (5750 and 5770). This review clearly shows the step up in performance when going from crossfire 5750's to 5750+5770 and finally crossfire 5770. If the faster card was downclocked the 5750+5770 setup would perform identically to the crossfire 5750 setup but it doesn't, instead it sits in the middle of the other more usual configurations.

http://www.xbitlabs.com/articles/video/display/asus_eah5770-powercolor_pcs_hd5750.html
Click to expand...

Thanks that clears it up.

Martini1991 said:
I never said they downclock.
But you'll lose the shaders.

But you can't crossfire a 5870 and 5770 to begin with, I'm saying if you could, you'd lose the shaders.
Click to expand...

Yep, you can't mix those (I think ATI have a chart for this on their site), I get what you were saying now.
 
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