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Crossfire X problems...

Last response: in Graphics & Displays
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March 16, 2009 8:42:21 PM

Hi , my name is Sasha.

I have a strange problem with crossfire x
when i install the second one Sapphire 4870 X2
All of ( 4GPU`s and memmory blocks ) reduces there values to: GPU 507Mhz , Memmory 500Mhz.
When I restart the system they become normal , but when i play the game or benching the system and exit to Windows , they`re automaticaly reduces again to
( GPU 507Mhz , Memmory 500Mhz. ) What should I do , or its normal ?
Catalyst control center and Gpu-Z (last ver.) Shows that values before game or bench are 1st: GPU 507Mhz. Mem. 500Mhz.
2nd: GPU 750Mhz. Mem. 900Mhz.
3rd: GPU 750Mhz. Mem. 900Mhz.
4th: GPU 750Mhz. Mem. 900Mhz
and after the game or bench , when i exit to Windows All 4GPU`s reduced to: ( GPU 507Mhz , Memmory 500Mhz. ) All programs ( Gpu-Z , Catalyst control center or others are confirm that values been reduced, only restart helps ) :cry: 


Please if someone knows what to do help.

System Conf: Cpu: intel Qx9770.
Motherboard: Asus Rampage Extreme X48 ( Bios ver. 1003 ).
Memmory: Corsair 1600Mhz Cl7. 4x2Gb. total 8gb.
Video: Sapphire HD4870x2. X2
HDD: western digital velociraptor X4 in Raid.
PSU:Enermax Galaxy DX X.
Win Vista64 Service pack 1 (last build ). all drivers and ubdates are latest of course. :cry: 

More about : crossfire problems

March 16, 2009 9:15:06 PM

I have the same problem with just one 4870x2. I found that using Riva Tuner to manually set the speed of the graphics card to 750/900 will solve the problem. I believe this is a problem with the bios on the card because sapphire lowers the core and memory clock when idling but in my case they stay at 507/500, even if i overclock with the ATI catalyst they remain the same. So if you have that problem which it seems to me, use Riva Tuner to manually set the clock speeds and you should be good.
March 20, 2009 3:13:52 AM

dont worry. this is normal . you wouldnt want your engin running at 6000rpms while your sitting at a red light would you? your speeds are reduced because their not needed to run windows and it uses less electricity.
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March 20, 2009 3:22:48 AM

Correct. This is a power saving feature that ATI implemented. When not gaming the GPU downclocks and thus you save power and in the same time the noise of the fan cooling the card is substantionaly lower. Install GPU-Z and you can see that when not gaming the card is only using 23 A. When gaming and GPU is under load VDDC Current can go up to 53A but it usually stays in the mid 40s range.

Cheers
March 20, 2009 8:49:23 AM

This has been on graphic cards for years..I'm amazed people don't know that it's a actual feature yet O.o
March 20, 2009 9:46:41 AM

He is talking about it getting stuck. And yes from my experience HIS cards do it too, set it manually to the correct speed and you'll do great. Or you could try overclocking a bit, depends on how hot they are.
March 20, 2009 11:26:39 AM

The_Blood_Raven said:
He is talking about it getting stuck. And yes from my experience HIS cards do it too, set it manually to the correct speed and you'll do great. Or you could try overclocking a bit, depends on how hot they are.



I have an HIS card, and I've never had that problem.
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