Last post by hen6e - February 12, 2018, 10:05:35 pm
Thank you Roy. I think the 6-pin fan's pinout is connecting 6.5.1 together as groung, other pins are like generic 4-pin fan. Because of Chinese Spring Festival I can't test it in about 10 days. We can communicate with each other with a instant messaging software. As for power supply I want to use a server psu DPS-800GBA so I don't want to use that adapter although that seller is close to me. Thank you for your pinout again. Here is a photo of the orignal fan from Taobao.
maybe you can point a "non techy" in the right direction? I'd really appreciate it.
I have an HP Z800 of which I want to upgrade the graphics card to one, or possibly later two, GTX 1080Ti or GTX1080. The cards draw 250watt each and require two 8pin power connectors each. Clearly to much for the 850watt psu inside the machine.
I was thinking of upgrading to HP's internal 1250watt psu, but it has a number of drawbacks. -very expensive 503€ -Not enough & not the right connectors -Not a good reputation in terms of reliability -More heat builtup inside the machine +Lives inside the box
So I plan to add an external 600watt ATX power supply for the graphics cards. The rest (motherboard & Co) will continue to run over the internal HP psu. Result:
+Enough reliable power (2x 300watt) +Correct number and correct type of power connectors (4x 8Pin) +65€ only -External box (it "lives" under the table so i do not mind at all.). -Needs ATX "power good signal to work"
Here is my question. I need to branch off the "power good" signal to sent it to the ATX connector of the external psu. All adapters I have seen so far only allow either an ATX Y or plug into the HP power supply connector which would than be occupied by it. Still, I need this plug to be fully functionally attached to the motherboard.
Can you tell me please, if I could connect the two "power good" pins of the ATX (14 green & 15 black) on the external PSU to two pins on the memory power supply cable of the Z800? Which two pins on the HP cable should/could I use in this case? I think the easiest would be to simply solder two cables to the HP cable and attach them to an ATX connector which plugs into the external psu.
Once this ATX connection is made I would connect the two cards to the external PSU and leave the external psu in standby. When the Z800 gets switched on, the "power good" signal goes to the external psu, switches it on and supplies power to the two graphic cards. Would that work?
Last question. Do you think the 850Watt HP internal PSU would have enough power for a processor upgrade from dual X5650 to dual X5690 remaining if the graphics cards are not attached to it? I have the dual X5650 version right now. Do i need to upgrade cooling then?
Thank you for the pinout you are right, I have checked it with the cables of the original power supply. For the 18 pin connector I cannot find out the pinout on this way, but I think it is the same like for older version z620 z820. It is possible to by adapter for low price (company adaptere).
The next problem is the cpu fan, 6 pin ! My fan has only 4 pin.
Last post by hen6e - January 30, 2018, 11:20:46 pm
I just bought this board a few days ago.By measuring the impedance of pins from the connector , I guess the pinout is as shown in the attachment.But I cannot confirm that.So, your measurement will be the final result. Finally, Can you share the pinout of 24pin-to-18pin adaptor?