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Upgraded CPU. Now my computer won't boot

James7777

Junior Member
Sep 5, 2017
1
0
1
So first I'll post specs
MOBO- MSI z97 pcmate
Old processor- i5-4460
New processor i7-4790k
Ram 4x4 ddr3 g.skill
GPU MSI gtx 980
1 Trion 128gb SSD
1 TB HD
600wt power supply
Cpu Ian cooled by a custom water cooling loop

So my computer has been running fine for a long time now but I decided to upgrade to a better CPU. After I carefully removed the old CPU cleaned all thermal paste on waterblock and applied new paste to the CPU I put it into the motherboard tried to start it and all the lights come on my graphics card fans spin my water pump pumps water through the loop but nothing happens no bios nothing no signal at all. Everything is securely installed. But no signal from the new CPU. Help
 

StinkyPinky

Diamond Member
Jul 6, 2002
6,596
522
126
You tried resetting the bios? Should be a clear cmos jumper (or button) somewhere.
 

LTC8K6

Lifer
Mar 10, 2004
28,520
1,573
126
Have you put the old processor back in yet to see if that still works?
 

SlowSpyder

Lifer
Jan 12, 2005
17,305
998
126
I've had to reset the bios for CPU upgrades, especially if I had custom settings. As someone said, pulling the CMOS battery and trying again wouldn't hurt.
 
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Engineer

Elite Member
Oct 9, 1999
39,234
699
126
Do you happen to know what BIOS version (latest?) that you have installed? I looked through the BIOS list and have noted several updates related to CPU Microcode. Worth taking a look at outside of hardware damage, of course.
 

XavierMace

Diamond Member
Apr 20, 2013
4,307
449
126
According to the compatibility chart, the 4790K needs BIOS v42 to work. If you're running the original BIOS, that's likely your problem.
 

crashtech

Diamond Member
Jan 4, 2013
9,866
1,655
126
Z97 boards should have come ready for Haswell Refresh out of the box. That's why they were released. I guess I ought to look at the chart...
 

LTC8K6

Lifer
Mar 10, 2004
28,520
1,573
126
Yeah, there was a couple month delay before the Devil's Canyon Haswell refresh chips were released.
Both the 4460 and 4790K are Haswell refresh chips, but a couple months apart.
 

kyubi

Senior member
Feb 11, 2008
544
33
91
Hopefully not a bad chip. Same thing happend to a buddy but once he put the original CPU in there it was fine. No bent pins. Try the original CPU and let us know
 

RichUK

Lifer
Feb 14, 2005
10,318
672
126
I've only skimmed this, but did you upgrade to the latest BIOS using the original cpu before installing the new one?
 
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