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Topic: 6970 question (Read 1021 times)

sr. member
Activity: 322
Merit: 250
June 09, 2011, 09:53:57 PM
#7
isn't 6970 single GPU??? 6990 is dual GPU

Yes, but you can run multiple cards on one motherboard... lol
legendary
Activity: 1806
Merit: 1003
June 09, 2011, 09:27:02 PM
#6
isn't 6970 single GPU??? 6990 is dual GPU
sr. member
Activity: 322
Merit: 250
June 09, 2011, 09:18:28 PM
#5
WRONG!
You can only use 4 GPU's for 3d rendering as that is all current drivers allow for.

BUT!

As like F@H, cryptology can be done with multiple GPU's, as it uses its cores NOT the GPU itself as a collective.

Technically true the FAH clients lets up to 8 GPUs run but there is software mod or something. What happens when you try to load 5+ GPUs in Windows 7 with pocblm it doesn't load drivers for any card after the 4th GPU and when you assign device=4+ it doesn't recognized it. Core-wise I'm not so sure if Windows recognizes dual-GPU cards as 2 GPUs or 1 GPU. This is from personal experience with 5x5870 so other people might have had better luck.

Again, I said that in theory. Honestly, you will run into scaling problems. When you run <3 GPU's on a single computer, you are losing performance.
2x the same GPU does NOT equal 2x the performance
sr. member
Activity: 304
Merit: 250
Do your part for Bitcoin!
June 09, 2011, 09:15:40 PM
#4
WRONG!
You can only use 4 GPU's for 3d rendering as that is all current drivers allow for.

BUT!

As like F@H, cryptology can be done with multiple GPU's, as it uses its cores NOT the GPU itself as a collective.

Technically true the FAH clients lets up to 8 GPUs run but there is software mod or something. What happens when you try to load 5+ GPUs in Windows 7 with pocblm it doesn't load drivers for any card after the 4th GPU and when you assign device=4+ it doesn't recognized it. Core-wise I'm not so sure if Windows recognizes dual-GPU cards as 2 GPUs or 1 GPU. This is from personal experience with 5x5870 so other people might have had better luck.
sr. member
Activity: 322
Merit: 250
June 09, 2011, 09:05:45 PM
#3
WRONG!
You can only use 4 GPU's for 3d rendering as that is all current drivers allow for.

BUT!

As like F@H, cryptology can be done with multiple GPU's, as it uses its cores NOT the GPU itself as a collective.
sr. member
Activity: 304
Merit: 250
Do your part for Bitcoin!
June 09, 2011, 09:00:29 PM
#2
Some people have managed it but its kind of arbitrary. If your staying with Windows 7 a good rule of thumb is unless you know your motherboard can explicitly support it and you have the time or the experience modding conf files. 4 is probably the max GPU for Windows 7.
newbie
Activity: 40
Merit: 0
June 09, 2011, 08:49:31 PM
#1
Can i put 3 or more HD 6970 on windows 7. As i understand 6970 has to GPU each and Windows only allow 4 GPUs to run. Correct me if im wrong.

Or should i get HD 5870 instead
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