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July 19th, 2019 06:00
Dual GPU with T5600 Power Rail Question
I have a dual socket (populated) T5600 and I would like to hook up dual GPUs. I have the 1300W power supply connected, but it seems that the power rail (Dell's Power Supply extended card) cannot send enough power to the POWER_VGA1 8 pin connector to power dual GPUs. The GPUs have a max power consumption of 235W. I have tried two different methods to get this to work:
- Method 1:
- Power Rail -> 8 Pin to dual 6 pin adapter |-> 6 Pin to 8 pin adapter -> GPU1
- |-> 6 Pin to 8 pin adapter -> GPU2
- Method 2:
- Power Rail -> 8 Pin to dual 6 pin adapter |-> 6 Pin to 8 pin adapter -> GPU1
- Motherboard -> SATA -> SATA Power to 8 pin adapter -> GPU2
Neither method supplies power to both GPUs. Method 2 provides enough power to GPU1 but not GPU2. I have looked at the following posts which have not helped as much as I had hoped:
- Dell Precision T5600, T7600 and perhaps other Precision towers WRT 8pin and dual 8pin GPUs
- Dell Precision T5810 GPU Video Card Upgrade
I'm wondering if there is a way to get this to work that I haven't thought of. I'm thinking about:
- Power Rail -> 24 Pin adapter -> External Power Supply -> GPU2 (not sure if 24 pin adapter will work)
- Trying a different power rail from Dell
Any ideas how I might get this to work (unofficially)?
bmcowboy
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July 19th, 2019 09:00
Hi @boonedoggle ,
See if this post helps. The writer successfully power 2 GTX 1080 SC with a 825w PSU with the following connection:
Besides, make sure your dual GPU cards installed on PCIe slot 2 and 4. Only these 2 slots provide enough power for your GPUs.
boonedoggle
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July 26th, 2019 14:00
That is a great post and I didn't see it in my searches. Unfortunately, that was one of the options I had tried (Same power draw points as Method 1). I'm guessing that it worked for the GTX 1080 because they are 180W each and I am 235 W each. When both GPUs were going full force, the system would just shut down.
I ended up getting the following to work:
DELL-Cares
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November 29th, 2020 08:00
Please private message the system service tag so that we can review and assist you further.
DELL-Cares
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27.5K Posts
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November 29th, 2020 08:00
Hi,
Thanks for reaching out to us.
I’m Prashanth from the Dell Social Media team. Please allow me few minutes so that we'll quickly review the details and assist you further.
-Prashanth
MickKr
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November 29th, 2020 08:00
I know that it's a bit old thread but:
What Dell PSU do you have originally ?
I changed GTX 970 EVGA to Asus GTX 1080TI and mine T5610 dies on Passmark 3D test. So I use 2nd option power connection - PSU 8-pin and MOBO 2 x SATA connector to 8 pin. It helps, and today I swapped with someone PSU to 825W and it works form PSU to GPU with dual 8-pin splitter only.
I found that GPU is only a little bit faster than my old GTX 970 on PassMark - 7800 / 10500 pts.
So I moved 1080Ti to my son MOBO with i7-7700 4.5GHz CPU / DDR4-3200 and it clocks 16600 pts !
I don't have any idea how to make it faster. Maybe it's CPU clock speed ? Mine are CPU are 2x E5-2650 v2 2.6GHZ, I even start looking for E5-2687W v2 CPU which is 3.4 GHz to 4.0 GHz on turbo mode.
What you think about that ?