Acer Predator g3-605 Just upgraded my CPU and now I get black screen on booting

Jamesgreen193

Hi,

I recently bought an i7 4790k for my aged Acer Predator g3-605 and I thought it should be compatible since it has the right socket. I replaced my old CPU (i5 4440) with the new one. However, when I try and boot up the pc I get a black screen. The pc turns on and lights up but there is no signal whatsoever to the monitor. I did not update my bios before upgrading the CPU, is this what I should have done? Is there a way to recover this situation?

Many thanks,

James

[Edited the thread to add model name to the title]

billsey

I would have expected it to work, but the same as an i7-4790 without the K because the BIOS wouldn't have K support. The TDP is higher on the K model, but not by much, so there shouldn't be a lot of extra cooling needed. You should be able to just drop the old CPU back in to get back to where you were. It's possible the new CPU is a bad one, or you didn't get the GPU fully seated when you replaced it…

Jamesgreen193

Hi Billsey,

It could have been dodgy, but I didn't take out the GPU for the upgrade so it can't be the gpu. Unless I have to take the GPU out?

I put my old one back in afterwards and it works just fine.

So I have gone and got an i7-4770k (pre Haswell refresh) and tried that. My logic was that this one wouldn't require a bios update to work. I popped it in and instead of just a black screen and no startup, I got one long beep and a black screen and no startup. Could it be that this one is faulty? Or the i7 4770k is incompatible too?

After this I reinstalled the i5 4440 and it boots fine, so I can't have messed anything up like damaged pins or ram out of slot.

It seems strange that whatever CPU I throw at it doesn't work. The common denominator would be that both are k variants so maybe the k variants are incompatible with the motherboard? However I know from userbenchmark.com that people have put the i7 4790k and i7 4770k in the predator g3-605 with success.

Cheers for the advice,

James

billsey

The K processors are special and their extra features aren't supported in the BIOS, but I would expect them to work, just without the extra stuff like overclocking support. The i7-4770 should certainly work, and it's not all that much slower than the i7-4790. They shipped units with the i7-4770: