Craig110 Posted September 29, 2022 Report Share Posted September 29, 2022 I'm replacing a Dell OEM power supply with a TOUGHPOWER PF1 750w (Platinum) so that I can eventually add a decent-sized GPU to the system. I ordered one from Amazon and tried it a few days ago. (Note, I'm a computer enthusiast and professional for over 4 decades now, so swapping power supplies is something I've done many times in the past.) Keeping the new video card out of the picture - I am a firm believer in changing just one thing at a time when possible - only two connectors are needed; an 8-pin main power and a 4-pin auxiliary power. (The mainboard has a connector that sends power to the disks and DVD.) Simple: Take out the old PS, prep the new cables, insert new PS, plug cables into mainboard, confirm the cables are secure on all ends, plug into outlet, switch to "1" and hit the boot button. Nothing. Hmmm, ok, double-checked everything and all the connections are good, the correct half of the separated 8-pin connector is being used in the 4-pin slot, everything is oriented correctly and the cables are secure. Try to boot again. Nothing. I swapped what I could to see if a cable was having problems: Swapped the power cable, confirmed I was using the same outlet as before, and swapped which of the CPU power cables was acting as the main connector. No change. I figured that something was amiss with the PS itself and so sent it back and ordered a replacement. Oh, and of course my old PS powered up the system immediately upon being installed. The replacement came in today and I just went through the process of installing it. Hit the boot button and the system did nothing. (Oops, started to think that the one I sent back wasn't broken after all.) Thinking it was detecting a fault somewhere, I unplugged everything (memory, power line to disk, fans, etc) one at a time to isolate the problem. Nothing. I added a Kill-A-Watt meter to the power line and confirmed that yes, the PS was drawing a few watts of power. Put the old PS back in and the system is up and happy. The mainboard is a Dell 0C27VV A03. Any known issues trying to power this with a PF1 750w? Any suggestions on what I should do next? Thank you. Craig Quote Link to comment Share on other sites More sharing options...
TT Lily Posted October 4, 2022 Report Share Posted October 4, 2022 Hello @Craig110, Thank you for your message and we are sorry to hear that. Here are some suggestions for you: - Please must install our cable on PF1 because all pin definition of power cable are not same in different supplier. - If the system is still not working, please find your purchaser to test PSU. - We offer 10 years warranty. Hope this information helps! Quote Link to comment Share on other sites More sharing options...
horusfalcon Posted January 28 Report Share Posted January 28 (edited) Hi, Craig, Let me guess: your Dell is something in the Optiplex sereies, maybe a 780? I just connected up an 8-pin EPS power cable from my brand-new ToughPower GF1 750W to my Precision 3620's 8-pin power and 4-pin CPU (a bit of a stretch on the cables...) and PCIe Power to the installed GPU. It did nothing. My suspicion is that,without the 24-pin ATX cable plugged into the PSU there is something holding it out (not enough load, or a sense line for the power switch on the case which is only tied to that 24-pin cable. I have seen elsewhere that a 24-pin to 8-pin EPS12V adapter is needed to make this work, and I have such an adapter coming. I do have a new GPU in the card cage, an Nvidia RTX 3060, and I did also plug in a GPU cable with the proper 8-pin connector for it. It's late. Tomorrow, I start by disconnecting the GPU power and removing it from the card cage. If it powers up at that point, Bob's my uncle. I might also bench test the supply with my PSU tester and see what's up with it. It sounds like you and I are chewing some of the same ground, so maybe, between both of us, we can find the answer here. Edited January 29 by horusfalcon correct GPU model no. (typo) Quote Link to comment Share on other sites More sharing options...
horusfalcon Posted February 6 Report Share Posted February 6 (edited) Hi. It's been a while, but the part I was waiting for finally came in. What I ordered was: https://www.newegg.com/p/2MV-00KA-00002 It works as advertised. To be clear, this is an interposing connector between the 24-pin power coming from the PSU via a transformer board to the 8-pin EPS12V socket on the mainboard. My daughter's Dell Precision 3620 is alive and well after this adapter was connected. If Thermaltake offers a similar part, I failed to find it. I'm still not sure why the 24-pin cable was required for my GF1 750 to start, but there it is. Edited February 6 by horusfalcon braino - 24 pins vs 40... Quote Link to comment Share on other sites More sharing options...
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