H81M-C no beeps/post with i7-4790?

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GeorgeDG

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Oct 18, 2014
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Hi, I've just bought an i7-4790 to upgrade from an i5-4570, when I've installed the new CPU, ther were no beeps or post to the display.

I've tried to take out the ram sticks to see if I get any errors, but nothing, the fans spin on both the GPU and CPU, but with without booting...

I have a CiT 500w PSU, 8GB DDR3 Ram and the Motherboard is an Asus H81M-C

Any ideas?
 
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GeorgeDG

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Oct 18, 2014
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The bios version I have is 3501 which is the latest. I've tried to flash the bios with that latest version but same thing... Maybe the CPU is faulty? I got it second hand btw... It also seems like it has the same power consumption as my old i5 so it shouldn't be a PSU power
 
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feelinfroggy777

feelinfroggy777

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Dec 13, 2016
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I would try booting it with integrated graphics. Take out the GPU and see if you can get it to boot. I don't know what GPU you have so I cant say what PSU requirements you need to meet. But 500 watts is plenty for the 4790 running on integrated graphics.

The issue very well could be your PSU though and not the CPU. I would get rid of that PSU as fast as I could. I suggest getting a EVGA, Seasonic, or Corsair. A faulty PSU can damage your components and I would hope that is not the case here.

Did you get different RAM or anything like that? The CPU was installed properly with no bent pins during installation?
 
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GeorgeDG

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Oct 18, 2014
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The GPU I have is a GTX 1050 Ti that doesn't require any pin connectors, I've tried on both the integrated and dedicated GPU, and still no output. The CPU was also installed corectly without any bent pins. As I said, I was running an i5 4570 and now a Pentium G3220 on the same motherboard and power supply, so either of those should be a problem, as both i5 and i7 use 85w from the PSU. Also, this is very weird, I took all the RAM sticks out and turned the computer on while on the i7, and there were no beeps at all...
 
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feelinfroggy777

feelinfroggy777

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Dec 13, 2016
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It maybe the chip. It is used so there could always be an issue with it. I have just found in my experience that when there is an issues, it is usually a mistake that I have made and not faulty equipment.

Have you put the Pentium back in and the PC boots? If that is the case, then it is probably a bad chip.
 
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GeorgeDG

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Oct 18, 2014
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Yes, I just used the same computer with the Pentium to reply to your posts, and I've played some games for a few hours, so everything works perfectly. I'll just go back to the shop and exchange the CPU. But if you still have any ideas I'll gladly take them

Thanks.
 
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