Hello there.
I just upgraded my MOBO (or kinda) from an old one with socket LGA775 to a brand-new one with LGA1050 (Gigabyte H81M-S2PV), I was planning to use my old 500W PSU as I have a GTX550Ti and only one optical disc drive, so, 500W should be enough afaik and besides being somewhat old chronologically, the PSU is quite new in terms of usage, plus it's a quality one.
The new MOBO have an 8-pin (2x4) power input for the CPU and my PSU have only a 4-pin connector, that's not a problem afaik as my processor is low-end and I don't plan to overclock, however, for my surprise, the MOBO didn't turn on, so, I removed all the stuff and left only one memory module and the processor, still no-go, it was quite clear to me that the problem was related to the power, as the fans were only spinning a little and the speaker only beeping a half-beep.
I decided to test the MOBO with a newer 200W PSU, also only with a 4-pin connector for the CPU, and for my surprise, it worked, and the older PSU works perfectly with the older MOBO, I never thought a PSU could be incompatible with a MOBO but it seems what's happening.
Of course I'm not going to install my VGA on a 200W PSU, but I can't understand what's wrong, all this thing just doesn't make sense to me, my guess is that by using an 4-to-8-pin adapter the thing would work, but it's just a guess, as if the (cheapo) 200W PSU worked perfectly, I don't understand why a quality 500W one wouldn't work if the connectors are exactly the same and I'm not aware of anything that could go wrong between the PSU and the MOBO because afaik there's no 'data' or any information between them other than basic switching.
Any ideas on what could be wrong? I've checked for short circuits on the MOBO, the CPU fan cable, short circuit on the reset pins, disassembled the PSU to visually inspect for unusual stuff (capacitors, etc.). My conclusion is that somehow the PSU is incompatible with the MOBO.
Any help is appreciated. Thanks in advance.
I just upgraded my MOBO (or kinda) from an old one with socket LGA775 to a brand-new one with LGA1050 (Gigabyte H81M-S2PV), I was planning to use my old 500W PSU as I have a GTX550Ti and only one optical disc drive, so, 500W should be enough afaik and besides being somewhat old chronologically, the PSU is quite new in terms of usage, plus it's a quality one.
The new MOBO have an 8-pin (2x4) power input for the CPU and my PSU have only a 4-pin connector, that's not a problem afaik as my processor is low-end and I don't plan to overclock, however, for my surprise, the MOBO didn't turn on, so, I removed all the stuff and left only one memory module and the processor, still no-go, it was quite clear to me that the problem was related to the power, as the fans were only spinning a little and the speaker only beeping a half-beep.
I decided to test the MOBO with a newer 200W PSU, also only with a 4-pin connector for the CPU, and for my surprise, it worked, and the older PSU works perfectly with the older MOBO, I never thought a PSU could be incompatible with a MOBO but it seems what's happening.
Of course I'm not going to install my VGA on a 200W PSU, but I can't understand what's wrong, all this thing just doesn't make sense to me, my guess is that by using an 4-to-8-pin adapter the thing would work, but it's just a guess, as if the (cheapo) 200W PSU worked perfectly, I don't understand why a quality 500W one wouldn't work if the connectors are exactly the same and I'm not aware of anything that could go wrong between the PSU and the MOBO because afaik there's no 'data' or any information between them other than basic switching.
Any ideas on what could be wrong? I've checked for short circuits on the MOBO, the CPU fan cable, short circuit on the reset pins, disassembled the PSU to visually inspect for unusual stuff (capacitors, etc.). My conclusion is that somehow the PSU is incompatible with the MOBO.
Any help is appreciated. Thanks in advance.
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