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Is this a faulty CPU?

debs3759

debs3759

debs3759

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7 Nov 2010
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193
I posted this in the motherboard section (and on other forums) but have so far not had an answer (except at asusrog forums, but not a helpful one yet).

I just installed a new CPU (2700K) in my Maximus IV Gene-Z, and can't get it to POST. I'm getting POST code 45 on the LEDs, which the manual says is an "OEM post memory intialization code". That means nothing to me. The only change is a new CPU.

I'm getting no display output from the GPU (an HD6770). I've removed and reseated the GPU, and done the same with all cables. I tried booting with all the SATA drives disconnected. I reseated the memory, and even tried the ram I had swapped out a couple of days ago.

Does anyone know what this code actually means? Or how I can fix it?

__________

Since the initial post, I have managed to get ROG COnnect set up on another computer, and used that to test what was happening. The results are:

Motherboad LEDs: 0E (Microcode not found)
ROG Poster Code: DD45
ROG Poster String: Detect Memory

Setting the board back to normal mode (ie ROG connect switch back in the off poition) I still get code 45.

The only part I know that has microcode is the CPU, and also the CPU is where the memory controller resides. So I am thinking I got the first faulty 2700K that I have heard of. Is anyone able to give me info that eithers confirms or denies what I suspect, or offer a suggestion that might work?
 
It's a firly new build - I actually built it about 2 weeks ago with a 2600K, but decided I want a 2700K instead so replaced it. The 2600K has been sold and shipped already, I couldn't pay for the 2700K without first selling the 2600K.

BIOS revision is 0902. According to the ASUS website it is supposed to be compatible, and someone on another forum has already told me they have a 2700K working in the Maximus IV Gene-Z.
 
Thats the latest BIOS so should run the cpu fine, daft question have tried a CMOS reset and only try one memory module.

Also remove the cpu and check for any bent pins on the motherboard.
 
The pins are fine, and I have tried 3 differnt pairs of memory modules, but I haven't tried just one. I'll try that, but don't understand how that would help (if it does boot with just one, does that mean the board is faulty?)
 
Just re-read the opening post and realised you have tried different memory.

Only thing i can suggest is trying the cpu in another motherboard or another cpu in yours, i would be surprised if its a faulty cpu.
 
Unfortunately, the 2600K that was working fine in it yesterday has been sold and shipped, so I can't retest the board with that. And I don't know anyone who has a computer this new - most people I know who have computers have systems as old or older than the one I am replacing, which is a few years old. And I haven't got s pare board myself either. So I have no way to test either :(

It just seems strange to me that a board that worked yesterday with the 2600K won't work today with an untested 2700K. But, not knowing much about POST codes I don't know if the board is trying to tell me something simple.
 
I have contacted a local PC repair shop, who have said they can test the CPU in another board and the board with another CPU to confirm which is faulty, and they will only charge around £20. As that's so much cheaper than RMAing the wrong part I'm going to take the system in to them before I use an RMA, then I can be sure which I need to send in for repair or replacement.

I have an RMA number for the CPU (thanks OCUK), but am beginning to think it is the MB that has a fault (for a number of reasons), so getting them both tested locally could save me a few ££ from sending the wrong part back for RMA :)

I'm not feeling so frustrated about it now I've had a chance to sleep on it :)
 
Thank you sedmonds. I didn't see that thread when I was searching their site last night.

Whenever anyone has suggested trying just a single module, I have assumed that would only cater for the possibility of faulty ram, and nobody corrected me when I said that. I have now tested all 4 slots with a single 4GB module, and with ram in slots A1 or B1 it boots, with it in A2 oir B2 it doesn't. So I now have 8 GB single channel, and will contact ASUS support as soon as possible.

I am so glad I can report the OCUK 2700K I bought is not faulty as I originally suspected :) Not happy about the mobo, but at least that is relatively cheap to replace with something "adequate" while I go through ASUS RMA process :)
 
The board is older thana the build. It was one of the first parts I bought, 31 days ago.

I've been doing some testing (and will have the motherbroard and processor tested locally tomorrow or Monday, so I can be sure which is faulty).

I so hope it is the motherboard that has developed a fault.

With 8 GB RAM in single-channel mode, I have it clcocked to 4.6 GHz with a Vcc of 1.28V, and it passed 5 runs of Intel Burn Text at Very High setting. I don't want it to be the integrated memory controller that's faulty, I might be able to get 4.8+ GHz on aircooling!



Gonna pray that the shop can test it tomorrrow :)
 
Update foranyone who has been waiting to hear it.

I received a new motherboard (another Maximus IV Gene-Z) today, and the OCUK OEM 2700K works perfectly in it, with all the memory slots being properly recognised. So I can now confirm that the processor is good and the board is faulty and going back to ASUS.

Thank you to those of you who offered help trying to troubleshoot it.
 
Good news hopefully you can enjoy your system, always a pain fault finding, had issues with my system couple of years ago with memory.
 
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