Why do you think the Mpower will do it while the gd-65 won't? They have the same PCIe layout.
EDIT: Could you also post your GPU settings and if you know it power consumption numbers? I have some of those same cards and love them. I run mine on low voltage, roughly .969-.99x and they put out 630 kh/s each at 950/1500.
Topic: Finally got 7x 7970 and 7x 7950 cards running on one motherboard! - page 2. (Read 12209 times)
August 31, 2013, 11:50:39 AM
August 31, 2013, 11:45:16 AM
@Bitweasil: Which GPU's are you using in your racks, that they are able to keep acceptable temps while spaced so tight?
We're mostly using reference design 7970s/7990s at this point. That development box was interesting in that we gained significant cooling by removing the shrouds from the GPUs and cooling them with case airflow alone - the shrouds/fans were hurting more than helping.
The airflow in the case is absurd - the newer ones have two full rows of very high power fans shoving air through the PCI section.
The bulk of our builds are reference 7990s at this point, which have no problems as there are only 4 in the system at a time (this gives us space to put an infiniband card in without losing any GPU space as we had to do with 7970s).
August 31, 2013, 11:34:10 AM
@Bitweasil: Which GPU's are you using in your racks, that they are able to keep acceptable temps while spaced so tight?
August 31, 2013, 10:53:21 AM
I could have told you that. :p
I sell systems loaded with 8x 7970 or 4x 7990 for password cracking use, but you wouldn't want to pay their prices - they're enterprise grade rackable systems with a warranty and typically onsite setup of the cluster as we're doing infiniband interconnects for Virtual OpenCL (VCL) clustering.
It's difficult getting 7 or 8 cards reliably working in systems. It's even more difficult when you have to make them rack mountable.
That's one of our development systems.
I sell systems loaded with 8x 7970 or 4x 7990 for password cracking use, but you wouldn't want to pay their prices - they're enterprise grade rackable systems with a warranty and typically onsite setup of the cluster as we're doing infiniband interconnects for Virtual OpenCL (VCL) clustering.
It's difficult getting 7 or 8 cards reliably working in systems. It's even more difficult when you have to make them rack mountable.
That's one of our development systems.
August 31, 2013, 09:27:47 AM
Hey guys,
I know a lot of you have given up on running 7x 79xx series cards because it's a huge pain in the ass. Well, I've found the right hardware combo to make it happen!
All cards are normally pegged at 740KH/s, but they're a little slower on this pool for some reason.
Rig hardware:
Ivy Bridge i3 or Pentium
MSI Z77 MPower
7x Sapphire Dual-X 7970
Seasonic 1000w Platinum + Seasonic X760w
Software:
Windows 8 x64
Techpowerup's 13.1 drivers
I have another rig running 7x GB WF3 7950s with an MSI Big Bang Xpower X58. I also have an MSI Z77-GD65 running another 6x 7970s which I'm going to try a 7th card on when I get a chance, but I don't think that board is going to work with 7 cards.
TLDR: 7 cards is possible!
I know a lot of you have given up on running 7x 79xx series cards because it's a huge pain in the ass. Well, I've found the right hardware combo to make it happen!
All cards are normally pegged at 740KH/s, but they're a little slower on this pool for some reason.
Rig hardware:
Ivy Bridge i3 or Pentium
MSI Z77 MPower
7x Sapphire Dual-X 7970
Seasonic 1000w Platinum + Seasonic X760w
Software:
Windows 8 x64
Techpowerup's 13.1 drivers
I have another rig running 7x GB WF3 7950s with an MSI Big Bang Xpower X58. I also have an MSI Z77-GD65 running another 6x 7970s which I'm going to try a 7th card on when I get a chance, but I don't think that board is going to work with 7 cards.
TLDR: 7 cards is possible!
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