Hello, I made some tests to understand the rail configuration on my PSUs : Dell 685 and 1300 W. The sticker on the top lists 5 and 10 rails respectively. Both PSUs work like a charm in my T7810 workstation. The distribution board I have to power my T7810 cannot use all the rails provided by the 1300 W PSU. In that way, the 685 W PSU is preferable for my configuration. For example, the T7600 workstation may fully use the 1300 W PSU. I have a distribution board for it. In both distribution boards, the rails are connected to the pins identified A1 to A32 and some from B1 to B32. At least 18 lines in B are connected to the ground. Power is mainly provided by A lines. A lines are grouped to power the connectors on the distribution board. In the T7810 distribution board, for example, the P1 connector uses 2 set of lines : 5 pins for the ground ans 3 pins connected to A9-11 lines. A9-11 lines seems to form an independent power source dedicated to feed a video card. This distribution board does not use A12-14 and A29-32 power sets. However they are used on the T7600 distribution board to feed a video card and one of the CPUs. From the T7810 distribution board, I see 7 power sets but the 685 W PSU has only 5 rails. From the T7600 distribution board, I see 10 power sets and 1300 W PSU has 10 rails. I do not know what is the exact relation between a rail and a power set. If A12-14 and A29-32 power sets are matching 2 rails, I would expect to get 2 x 12V x 18 A = 432 W. I plugged a Tesla k80 card using extra wires soldered on A12-14 and A29-32 and mounted in a 8-pin EPS plug that fits in this device. Precisely A12-14 pins connect pins 7 and 8, and A25-28 pins connect pins 5 and 6 on the Tesla board ([URL] On the Tesla side, the EPS connector requires 225 W. I hypothetized that A12-14 plus A25-28 may feed 432 W. Result with the 1300 W PSU. When the Tesla card is seated in a 16X PCIe slot without plugging my extra EPS plug, the T7810 starts normally (of course, in that way, I cannot use the card). When I plug this extra cable, the PSU seems to continuously restart (nothing appears on the screen, I cannot reach the BIOS and no beep is emitted). Note : "Memory Map IO above 4GB" is set in the BIOS. Despite of the fact this result is frustrating after so much effort, I wonder if someone may bring any information or point any error that may help me to reach my goal to have the Tesla k80 card powered correctly. Thank you for your help.
Hello, This unit, as described in title, offers two 10-pin CPU power connections. I want to plug devices requiring peak power up to 360W from a CPU connection (not PCIe power connection). Is there any reason I will not get this power from the CPU connection? Thank you for your help.
T7810 with 1300W power supply