Question Can I have my graphics card run off a separate power supply?

[SuicuneSol]

Can I plug in a separate power supply into a graphics card only and have it work out fine?

For context, my graphics card is displaying no signal on my monitor. Trying to determine whether my power supply is dead by plugging in a different power supply from another PC. But I don't want to completely remove my power supply from the other PC since that would open a can of worms. Was just hoping to stick the power cable from the PSU of one computer into a graphics card of another computer. For testing. And hoping that would not be a bad idea.

 

[Wolfshadw]

No. You cannot run just a graphics card from a separate power supply. You'll have to open that can of worms to test your components.

-Wolf sends

 

[Dj0gany]

Can I plug in a separate power supply into a graphics card only and have it work out fine?

For context, my graphics card is displaying no signal on my monitor. Trying to determine whether my power supply is dead by plugging in a different power supply from another PC. But I don't want to completely remove my power supply from the other PC since that would open a can of worms. Was just hoping to stick the power cable from the PSU of one computer into a graphics card of another computer. For testing. And hoping that would not be a bad idea.

If you dont want to fry something,dont do it.
It is best to use just one powersupply.
What are your pc specs,including psu.
Maybe we can help you pick one

 

[SuicuneSol]

Well okay, here are the specs.

Case: Corsair Obsidian Series 250D Mini tower
OS: Windows 7 Professional
Processor: Intel Core i5 4570 CPU @3.20 GHz
Motherboard: MSI Computer Corp. Z87I AC
Power: Corsair Builder Series CX 600 watt
Liquid Cooling: Corsair Hydro Series Cooling H75 Performance Liquid CPU Cooler
Thermal Compound: Arctic Silver 5
Memory: 8GB
GPU: MSI NVIDIA GeForce GTX 770 (Twin Frozr)

The 600 watt has served me well since 2014. I think another 600 watt replacement would work out juuust fine.

I'll rip out the other computer's PSU tomorrow...

 

[Wolfshadw]

Test 1 - Remove the graphics card from your current system and just try to boot up using the on-board graphics of your CPU. If it doesn't boot, it's likely the power supply or the motherboard.
Test 2 - Move the graphics card from the current computer to the computer with the power supply you were going to test with. It that system boots up with your graphics card installed, then the issue is likely the power supply in your current system.
Test 3 - Reinstall the graphics card into your current system. Replace your current power supply with the power supply from your other computer. If the system boots, it's pretty certain the issue is with your current (CX600) power supply.

-Wolf sends

 

[Dokkea]

Its most likely RAM check if RAM is in firm you have hear that clickly sound.

I had problem if its not ram its cable problem.

All of above is not a problem than its monitor.

 

[SuicuneSol]

Test 1 - Remove the graphics card from your current system and just try to boot up using the on-board graphics of your CPU. If it doesn't boot, it's likely the power supply or the motherboard.
Test 2 - Move the graphics card from the current computer to the computer with the power supply you were going to test with. It that system boots up with your graphics card installed, then the issue is likely the power supply in your current system.
Test 3 - Reinstall the graphics card into your current system. Replace your current power supply with the power supply from your other computer. If the system boots, it's pretty certain the issue is with your current (CX600) power supply.

-Wolf sends

Have already done Test 1 and Test 2. Want to clarify that the PCs "boot". Fans are whirring and lights are flashing. The only anomaly is that the monitor displays "no signal". (And the monitor itself is definitely good since I'm using it right now.)

Test 1 result was: computer boots fine without the graphics card. I'm using it to type right now.
Test 2 result was: The test PC, when installed with the graphics card of the current computer, displayed "NO-SIGNAL" when booted. This clearly indicated the graphics card was the problem.
But I did yet another test. I moved the brand-new graphics card (RTX 2070 Super) from the test PC to the current PC to see if that would help. But it did not! Despite having a brand-new graphics card, the current PC still displayed "no-signal". This is why I'm so mystified. Unless both the graphics card and power supply went bad at exactly the same time...

So Test 3 is the only one left, and I will do that tomorrow.~

 

[Wolfshadw]

I would agree with your assessment in that both the graphics card and power supply failed at the same time. Please let us know the results of test 3.

-Wolf sends

 

[USAFRet]

Power: Corsair Builder Series CX 600 watt

Yeah, that CX600 needs to be replaced. It was one of the crappier ones from Corsair.
I had one...it died, and killed a motherboard as it went out.

 

[SuicuneSol]

Hey so, I had to wait a couple days for the new PSU to arrive. I installed it into the machine. Turned it on. Booted up fine... without the graphics card.

Then I put the graphics card in, both the old one and the new one on two separate tests. Both of them displayed "no signal". In other words, switching out both the power supply and graphics card with new components fixed nothing.

Now I'm really and truly stuck. I don't know what to do or what to say. Is it possible that my newer graphics card and motherboard aren't compatible? Is there such a thing? At the very least I should get a signal. This sucks.

 

[USAFRet]

And you have the monitor connected to the GPU?

 

[SuicuneSol]

And you have the monitor connected to the GPU?

I had the monitor connected to the GPU and the motherboard on separate boots. It doesn't matter where the HDMI cable is plugged in. There is no signal.