I thought my PSU was at fault, but after buying a new PSU, the same fault is happening.
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Using my old PSU:
Radeon HD7850 without 6-pin PSU power = PC not beeping, turning on and off repeatedly, no monitor output. I don't think the Radeon HD7850 (2GB) can work when the 6-pin PSU is not plugged in?
The above card with 6-pin PSU power = worked once, then didn't work, did the above - PC not beeping, turning on and off repeatedly, no monitor output.
nVidia 7800GT with 6-pin = the PC shuts off almost straight away without booting, no monitor output.
nVidia 7800GT without 6-pin = Worked fine. Maybe it was a fluke because this combination does not work on a new PSU.
Cheap graphics card (HD5450) that has no 6-pin requirement = worked.
No graphics card in at all = works.
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Using a new PSU:
nVidia 7800GT with and without 6-pin = PC doesn't boot, or beep, it shuts off in less than 20 seconds.
The cheap HD5450 wasn't tested on the new PSU because I already knew the 7800GT didn't work with or without the 6-pin.
No graphics card in at all = works.
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Perhaps the newer PSU has better safety features and isn't letting the PC boot with the 7800GT plugged into the PCIE slot? On the old PSU, that combination did work - what didn't work was if I plugged the 6-pin into the 7800GT. This is why I replaced the PSU, but the same thing is still happening.
Since the 7800GT worked fine in the PCIE slot - but only on the old PSU - I thought that ruled out the PCIE slot on the motherboard being at fault. Now with a new PSU, the PC won't boot with either the Radeon HD7850 (+6-pin) or the old nVidia 7800GT (+6 pin or without it).
Just before I got the fault, I was hammering my system playing Mirrors Edge 2 and the new Hitman on it, both games pushed it to the max, especially Mirrors Edge 2 that played fine for a while, then after a week or whatever I could never get it to run smooth, whereas before that it did run smooth, so it seems that it suddenly not running as smooth was a sign that something was on it's way out.
All I can think this is now, is the PCIE slot on the motherboard, but for some reason with my old PSU it boots with the 7800GT in and no 6-pin, whereas on a new PSU that combination won't boot.
Is this at a point now where it can only be a faulty PCIE slot on the motherboard?
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Using my old PSU:
Radeon HD7850 without 6-pin PSU power = PC not beeping, turning on and off repeatedly, no monitor output. I don't think the Radeon HD7850 (2GB) can work when the 6-pin PSU is not plugged in?
The above card with 6-pin PSU power = worked once, then didn't work, did the above - PC not beeping, turning on and off repeatedly, no monitor output.
nVidia 7800GT with 6-pin = the PC shuts off almost straight away without booting, no monitor output.
nVidia 7800GT without 6-pin = Worked fine. Maybe it was a fluke because this combination does not work on a new PSU.
Cheap graphics card (HD5450) that has no 6-pin requirement = worked.
No graphics card in at all = works.
----------------------------------------------------------------------------------------------
Using a new PSU:
nVidia 7800GT with and without 6-pin = PC doesn't boot, or beep, it shuts off in less than 20 seconds.
The cheap HD5450 wasn't tested on the new PSU because I already knew the 7800GT didn't work with or without the 6-pin.
No graphics card in at all = works.
----------------------------------------------------------------------------------------------
Perhaps the newer PSU has better safety features and isn't letting the PC boot with the 7800GT plugged into the PCIE slot? On the old PSU, that combination did work - what didn't work was if I plugged the 6-pin into the 7800GT. This is why I replaced the PSU, but the same thing is still happening.
Since the 7800GT worked fine in the PCIE slot - but only on the old PSU - I thought that ruled out the PCIE slot on the motherboard being at fault. Now with a new PSU, the PC won't boot with either the Radeon HD7850 (+6-pin) or the old nVidia 7800GT (+6 pin or without it).
Just before I got the fault, I was hammering my system playing Mirrors Edge 2 and the new Hitman on it, both games pushed it to the max, especially Mirrors Edge 2 that played fine for a while, then after a week or whatever I could never get it to run smooth, whereas before that it did run smooth, so it seems that it suddenly not running as smooth was a sign that something was on it's way out.
All I can think this is now, is the PCIE slot on the motherboard, but for some reason with my old PSU it boots with the 7800GT in and no 6-pin, whereas on a new PSU that combination won't boot.
Is this at a point now where it can only be a faulty PCIE slot on the motherboard?
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