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[Official] AMD Radeon HD 7950/7970/7990 Owners Thread - Page 1205

post #12041 of 38704
Quote:
Originally Posted by SonDa5 View Post

HD7950 multicard scaling doesn't seem to work very well.
I thought CF scaling got better lately.......... Still not enough?
post #12042 of 38704
Quote:
Originally Posted by RandomK View Post

Other than the damn sleep bug I haven't had any issues at all. I've also found scaling to be excellent overall so I'm curious to know what problems you're having? I had two 5770s in crossfire once upon a time and believe me things have come a long way...

I ran HD5770 crossfire as well and HD5770 crossfire with the reference HD5770s worked great for me. I very noticeable performance increase.


HD7950 scaling is far from double performance... Right now looks like mabey 33% performance increase.
Edited by SonDa5 - 6/13/12 at 9:01pm
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post #12043 of 38704
Quote:
Originally Posted by Testier View Post

I thought CF scaling got better lately.......... Still not enough?

Far from enough. Lousy.


Single Card HD5770 on 3dMark11 4,572 marks.

http://hwbot.org/submission/2211261_sniperoz_3dmark11___performance_radeon_hd_5770_4572_marks

2xHD5770 on 3dMark11 7,277 marks.

http://hwbot.org/submission/2266857_poparamiro_3dmark11___performance_2x_radeon_hd_5770_7277_marks


About 59% improvement with 2 cards.



Single card HD7950 on 3dMark11 12,386 marks.

http://hwbot.org/submission/2286693_publicenemy_3dmark11___performance_radeon_hd_7950_12386_marks


2xHD7950 on 3dMark11 16,695 marks.

http://hwbot.org/submission/2277174_winnah9000_3dmark11___performance_2x_radeon_hd_7950_16695_marks

About 34% improvement with 2x cards.



HD5770 scaled much better. The new GTX 6XX cards scale way better than AMD HD7XXX cards.
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post #12044 of 38704
I dont think high end card scales that well and you are looking at 3d marks 11 score which includes CPU and etc. IMO
post #12045 of 38704
Quote:
Originally Posted by Testier View Post

I dont think high end card scales that well and you are looking at 3d marks 11 score which includes CPU and etc. IMO

Scaling is pretty good actually in real 3D based benching. And I concur about the mixed bench aspect of 3Dmark, it puts too much weight on other aspects.


1
375

2
375

3
375

4
375


I had some issues with the 4th card, Sapphire OC. It was a crappy overclocker at 1300mhz but am replacing it with a diff card at which point will try and raise that quad score some more.
Edited by tsm106 - 6/13/12 at 10:17pm
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post #12046 of 38704
Quote:
Originally Posted by tsm106 View Post

Scaling is pretty good actually in real 3D based benching. And I concur about the mixed bench aspect of 3Dmark, it puts too much weight on other aspects.


Comparing GTX 670 for SLI with 3dMArk11 and its easy to see much better scaling on the GTX 670 in multi card operation.
Edited by SonDa5 - 6/13/12 at 11:26pm
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post #12047 of 38704
Quote:
Originally Posted by SonDa5 View Post

Comparing GTX 670 for SLI with 3dMArk11 and its easy to see much better scaling on the GTX 670 in multi card operation.
The scores you posted..., the score with one card was score with tess off, and score wit two cards, was with tess on.
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post #12048 of 38704
Quote:
Originally Posted by sena View Post

The scores you posted..., the score with one card was score with tess off, and score wit two cards, was with tess on.

Still probably only going to add about 1000 points with tess off.


I see that crossfire does work well a few 3d applications like Heaven and that is good to see.

Hope AMD drivers improve. Would be nice to see Heaven like crossfire performance on everything.
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post #12049 of 38704

I get great scaling in BF3, very easy to tell when my crossfire hasn't enabled, night and day difference.

 

Here is my best 3dmarks11 score, I can overclock higher now and still cant get over the 19,000, guess that is down to the 12.6beta, think I might just roll back on the AMD drivers

 

http://3dmark.com/3dm11/3279379

3d11.JPG

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post #12050 of 38704
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Originally Posted by SonDa5 View Post

Still probably only going to add about 1000 points with tess off.
I see that crossfire does work well a few 3d applications like Heaven and that is good to see.
Hope AMD drivers improve. Would be nice to see Heaven like crossfire performance on everything.
Still you need to watch only GPU score, because that 2600k is starting to be bottleneck in main score with two HD 7950 even on 5.0 GHz.
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