No POST with GPU installed

[amyjean]

My new build will not POST when the GPU is plugged in (it will with the GPU seated but not plugged in, if that matters). I can get it to POST without the GPU, but I cannot get display input when my monitor is plugged into my mobo (via HDMI).

The CPU of my old build died, and to replace it, I had to get a new mobo and new RAM as well. Everything worked fine (minus the CPU, which had been on the fritz and randomly killing my computer for a while), but my computer randomly shut down the other night and I couldn't get it to turn back on--the power LED would flash once and the fans would move ever so slightly on the CPU, but that was it.

However, I cannot get the new build to POST. After testing to narrow the problem down (paperclip test and breadboarding, including going through the stickied list here), it became clear that the GPU was what wasn't working. With the GPU in, I get nothing: there's a flash of mobo lights, the fans nudge ever so slightly, and then everything dies. A friend suggested that the PCI-E cables on my PSU could be busted, so I bought a molex to PCI-E cable and tried that, but no dice.
So, I tried booting without the GPU installed. It does indeed boot and seems to POST (honestly, with no display and no mobo speaker, I can't truly tell, but it sounds like it's POSTed; the hard drives whir and such), but I can't anything to show up on my monitor. I'm not sure if I have a faulty mobo or if something else is going on, so any insight would be appreciated. Of course, I'd also like to be able to use my GPU!

My specs
CPU: AMD Ryzen 5 2600X
Motherboard: Gigabyte X470 Aorus Ultra Gaming
RAM: G.Skill Aegis DDR4 3000MHz CL16 Dual Channel 1.35V
CPU cooler: The one that came with the Ryzen
Video Card: nVidea GTX 960
Power Supply: 600w
Hard drive(s): SSD 250GB; HDD 1TB
Operating System: Windows 10
Case: Deepcool Tesseract SW Mid Tower
ANY other parts: an optical drive; some old thing that came with a Dell in like 2007

Thanks a lot in advance!

 

[jacobweaver800]

My new build will not POST when the GPU is plugged in (it will with the GPU seated but not plugged in, if that matters). I can get it to POST without the GPU, but I cannot get display input when my monitor is plugged into my mobo (via HDMI).

The CPU of my old build died, and to replace it, I had to get a new mobo and new RAM as well. Everything worked fine (minus the CPU, which had been on the fritz and randomly killing my computer for a while), but my computer randomly shut down the other night and I couldn't get it to turn back on--the power LED would flash once and the fans would move ever so slightly on the CPU, but that was it.

However, I cannot get the new build to POST. After testing to narrow the problem down (paperclip test and breadboarding, including going through the stickied list here), it became clear that the GPU was what wasn't working. With the GPU in, I get nothing: there's a flash of mobo lights, the fans nudge ever so slightly, and then everything dies. A friend suggested that the PCI-E cables on my PSU could be busted, so I bought a molex to PCI-E cable and tried that, but no dice.
So, I tried booting without the GPU installed. It does indeed boot and seems to POST (honestly, with no display and no mobo speaker, I can't truly tell, but it sounds like it's POSTed; the hard drives whir and such), but I can't anything to show up on my monitor. I'm not sure if I have a faulty mobo or if something else is going on, so any insight would be appreciated. Of course, I'd also like to be able to use my GPU!

My specs
CPU: AMD Ryzen 5 2600X
Motherboard: Gigabyte X470 Aorus Ultra Gaming
RAM: G.Skill Aegis DDR4 3000MHz CL16 Dual Channel 1.35V
CPU cooler: The one that came with the Ryzen
Video Card: nVidea GTX 960
Power Supply: 600w
Hard drive(s): SSD 250GB; HDD 1TB
Operating System: Windows 10
Case: Deepcool Tesseract SW Mid Tower
ANY other parts: an optical drive; some old thing that came with a Dell in like 2007

Thanks a lot in advance!

It sounds like an interesting problem, do you have another power supply to use? I think it may be your PSU not powerful enough to run your system with the GPU in, it is stated at 600w which is enough but depending on the brand it may be too crappy to work. What brand is the PSU your currently using you may have to replace it.

 

[amyjean]

It sounds like an interesting problem, do you have another power supply to use? I think it may be your PSU not powerful enough to run your system with the GPU in, it is stated at 600w which is enough but depending on the brand it may be too crappy to work. What brand is the PSU your currently using you may have to replace it.

Definitely interesting! Unfortunately, I do not have a spare one, and I do not remember the brand (I'd have to take it out again to check), but I can tell you for sure it isn't an especially reputable/good one. At this point I'd be willing to try picking up a new one. I am using it at 115V; I don't know if that actually matters.
Do you have any recommendations for a good PSU brand and recommended wattage? It's nighttime for me now, but I will try a new PSU tomorrow.

Thanks for your reply!

 

[jacobweaver800]

It sounds like an interesting problem, do you have another power supply to use? I think it may be your PSU not powerful enough to run your system with the GPU in, it is stated at 600w which is enough but depending on the brand it may be too crappy to work. What brand is the PSU your currently using you may have to replace it.

Definitely interesting! Unfortunately, I do not have a spare one, and I do not remember the brand (I'd have to take it out again to check), but I can tell you for sure it isn't an especially reputable/good one. At this point I'd be willing to try picking up a new one. I am using it at 115V; I don't know if that actually matters.
Do you have any recommendations for a good PSU brand and recommended wattage? It's nighttime for me now, but I will try a new PSU tomorrow.

Thanks for your reply!

If the PSU is off brand it could have fried your GPU too, never trust an off brand PSU since you can be looking at a fire hazard with most of them. I would recommend an EVGA Supernova 550w PSU, they are around 60-70 dollars but it will have plenty of power for your system and plenty of room to upgrade the GPU in the future as it is not close to the total power draw of your system as is. I expect your system to draw somewhere in the neighborhood of 400-450 watts from the wall under load so you should have plenty of upgrade room and that PSU should last you for years to come. I understand you can get away with a quality 450w but PSU's have an efficiency curve where it will be less efficient under high loads, so getting a PSU with plenty of headroom will allow the PSU to run under less load adding to the efficiency of it so it should draw less power from the wall since there is less energy being lost to heat dissipation.