Computer Won't Post

[Ne0]

Situation: Computer was working perfectly fine, wanted to do a cpu swap. Upgraded from E4300 to Q6600, press power button and computer shuts off after a second or two.

I've built a dozen computers and this is the first time this happened to me. Decided to upgrade to Quad Core. Received the Q6600 today so I decided to install it... I set my Bios to set default settings and cleared CMOS. I removed the heatsink and E4300, applied arctic silver 5 on the Q6600, put the heatsink on, plugged in the cpu fan connector and now the computer won't post. I have a Gigabyte P35-DS3R Motherboard (with F10 Bios which supports Q6600). So I'm thinking that there might be a short somewhere or maybe it's the case power switch.

So I remove the motherboard and only leave cpu, ram (4 sticks of 1GB PC6400 DDR2 - I remove all but one stick), video card in on non conductive surface (wood board). I turn it on with a flat head screwdriver on the 2 power sw jumper pins... and the same thing happens. So I remove the Q6600 and put the E4300 back and still the same thing. When I remove the 4pin 12v next by the cpu, it stays on (all fans moving) but no video is displayed. I swapped out the video card 8800GT with a 8600GT I had lying around, same thing. I swapped out the Ram and put 1 stick in each slot, same thing. Everything else was working fine so I'm thinking it's either the power supply or the motherboard (the only two parts where I don't have a spare to test). Anyone have any ideas? Thanks.

 

[robisbell]

which motherboard revision is it? there's 3 revisions.

 

[Ne0]

Originally posted by: robisbell
which motherboard revision is it? there's 3 revisions.

I got it a week or two after it was released so revision 1.0

 

[robisbell]

need to actually look and not assume which revision. thanks.

 

[Ne0]

Originally posted by: robisbell
need to actually look and not assume which revision. thanks.

I'm not assuming, it is revision 1.0 (anyways how is this supposed to help?) I looked at the differences between the three (1.0, 2.0, 2.1) and all 3 are basically the same - don't see what you're trying to get at?

 

[robisbell]

well, that's why you asked for help, since you're to close to the issue to accurately see the problem.
I'll need the exact make and model of the ram.

 

[robisbell]

network hiccup, see above.

 

[Ne0]

I'm positive it's not the ram. G.Skill F2-6400CL5D-2GNQ PC2 6400 DDR2 (worked great for over 1 year, I have 4 sticks of this)
I also tried: OCZ2RPR8002GK PC2 6400 DDR2, and Patriot PSD22G6672 DDR2 PC2 5300

Anyways, I'm off to the store to buy a new power supply & motherboard (need one for a cheap rig anyways).

 

[robisbell]

okay, see some issues.

1. there's no such thing as F2-6400CL5D-2GNQ, you may have F2-6400CL5D-2GBNQ, might be others with similar series that are not compatible. unfortunately, gskill has not documentation on their memory specs, having to use other sites to make a educated guess.

2. which stepping was the Q6600?

3. the OCZ does not support the timing that the motherboard requires, the board accepts these from OCZ:
OCZ2G800R22GK, OCZ2N1066SR2GK.

the CPU may have been wrong stepping for the board and caused damage, always read the documentation the CPU, and motherboard manufacturers provide before you start putting parts together.

 

[Ne0]

If it was the wrong stepping (it's SLACR G0) it should've worked when I put my E4300 back in. Anyways turned out to be the motherboard. New Power Supply Installed on old P35-DS3R (same thing happening). Old Power Supply Installed on new EP35-DS3L board (perfect).