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5th GPU not showing up for work
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Topic: 5th GPU not showing up for work (Read 2219 times)
BigJim
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5th GPU not showing up for work
May 30, 2013, 09:38:40 AM
Last edit: May 30, 2013, 10:49:07 AM by BigJim
#1
Motherboard is MSI Z77A-GD65 GAMING.
Windows 7 enterprise.
Five 7850's.
5th card does not show up in GPU-Z.
What is the basic advice in this situation?
laris2
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Re: 5th GPU not showing up
May 30, 2013, 09:58:26 AM
#2
Quote from: BigJim on May 30, 2013, 09:38:40 AM
Motherboard is MSI Z77A-GD65 GAMING.
Windows 7 enterprise.
Five 7850's.
5th card does not show up in GPU-Z.
What is the basic advice in this situation?
Hi,
That could be windows not seeing the 5th gpu.
I did hear it is a windows issue that it's only able to see 4 gpus. Try seeing amount of devices on linux? (Little bits of speculation here)
TEST
operaficionado
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Re: 5th GPU not showing up
May 30, 2013, 10:17:26 AM
#3
Quote from: BigJim on May 30, 2013, 09:38:40 AM
Motherboard is MSI Z77A-GD65 GAMING.
Windows 7 enterprise.
Five 7850's.
5th card does not show up in GPU-Z.
What is the basic advice in this situation?
Hey, I am setting up my first rig on Ubuntu and I haven't been able to fit 5 GPUs on my motherboard, but 4 works perfectly
maybe you should give Ubuntu a shot and see if it works for you.
BigJim
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Re: 5th GPU not showing up
May 30, 2013, 10:20:11 AM
#4
I have heard, disable some devices in BIOS. That is pretty easy I will try that.
Some claim that Windows 7 can handle 5 GPU. Change to Windows 8 or Linux would take a while.
I guess I can also try different slots for the 1x adapters. This motherboard has 4 1x slots and 3 16x. I do have an ivy bridge cpu so in theory even 7 GPU is possible.
BigJim
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Re: 5th GPU not showing up
May 30, 2013, 10:36:12 AM
Last edit: May 30, 2013, 10:47:48 AM by BigJim
#5
Disabled 1 or 2 peripherals in the BIOS. Not much available. And no change. Still only 4 GPUs. According to GPU-Z. And the device manager has one Unknown Device.
Forum thread has people saying Windows 7 can do 5 GPU or more.
https://bitcointalk.org/index.php?topic=103244.20
https://bitcointalk.org/index.php?topic=188334.0
Sure ain't working for me though. Might depend on the AMD driver version?
Found this. May try w8. That might give me 5. Or even 6 with additional tweak.
https://bitcointalk.org/index.php?topic=215987.0
dimke_yu
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Re: 5th GPU not showing up for work
May 30, 2013, 11:31:27 AM
#6
Well you need to try out with different types of extenders. Every motherboard has its own settings. Also I recommend you to try to set up a Linux miner as it is far more stable and easier to work with. I only use windows for testing max clocks and bios flashing.
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BigJim
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Re: 5th GPU not showing up for work
May 30, 2013, 12:10:35 PM
#7
All 5 cards are 7850. Well, some are 1GB and some are 2GB. And some are different brands. But I can get any 3 of them to work. All are on 1x to 16x extenders.
Which linux distro? Are there any that "just work". That support more recent motherboards. And can easily get the AMD drivers.
dimke_yu
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Re: 5th GPU not showing up for work
May 30, 2013, 12:24:57 PM
#8
Well as for linux part there are number of distros that work well, only all-in-one solution is BAMT but I do not like it as it is live version. I use CentOS on 16GB usb flashdisk with minimal install options. From there you need to download all dependencies drivers and stuff install then configure it. If you have some linux knowledge and experience it should not be problem to make it work.
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BigJim
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Re: 5th GPU not showing up for work
May 30, 2013, 12:44:03 PM
#9
Here, BAMT is discussed. Looks like I can try it off a USB stick without yet stepping on my w7 install.
https://forum.litecoin.net/index.php?topic=2924.0
dimke_yu
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Re: 5th GPU not showing up for work
May 30, 2013, 01:28:30 PM
#10
Yes that is correct. Try it out.
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lbr
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Re: 5th GPU not showing up
May 30, 2013, 01:43:43 PM
#11
Quote from: BigJim on May 30, 2013, 10:36:12 AM
And the device manager has one Unknown Device.
Maybe it is ur 'lost' GPU? ; )
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