ASUS P7P55D Hard Freezes - Any Ideas?

Hello all. Thanks in advance for taking a look at my problem and sharing your thoughts.

I recently built a new system with the following components:

Intel Core i7 860 CPU 2.8GHz
ASUS P7P55D PRO LGA 1156 Intel P55 ATX Intel Motherboard
G.SKILL 8GB (4 x 2GB) low voltage 240-Pin DDR3 SDRAM DDR3 1333 (PC3 10666)
Thermaltake Purepower W0100RU 500W ATX 12V 2.0 Power Supply

I reused a couple of SATA HDDs and an IDE DVD-RW drive. All of this is housed in a very well-ventilated Thermaltake V9 case.

I have been running Windows 7 32-bit RC and switched to Windows 7 64-bit this week.

I started with all BIOS settings at the defaults / auto settings initially, except for RAM timing, which I had to set manually. The PC would crash frequently after being on for about an hour or two, going to a BSOD with the message “a clock interrupt was not received on a secondary processor.” Sometimes it would just lock up, with the action on screen hard freezing unless I reset the computer.

I tested all RAM in another PC and via DOS-based Memtest86. All passed with flying colors.

I then read on some overclocking site the “clock interrupt” error, at least for a Lynnfield processor, could be due to insufficient Vcore, or CPU voltage.

For Lynnfield, the max is apparently 1.40V, so I upped my Vcore in that direction, which seemed to stop the “clock interrupt” error. I was still getting hard freezes after an hour or two, so I did some additional research. I found some posts online that suggested raising what Asus calls “IMC voltage,” or integrated memory controller voltage. This is apparently what they call the DRAM controller that is now integrated into the Lynnfield chip. I upped that gradually to 1.35V but am still getting hard freezes.

I am really getting frustrated with this process and hope that someone else has experienced this problem and has some ideas. The PC passes OCCT, Linpack, and Prime95 just fine, but simply leaving it on, running Media Player or a web browser seems to be enough to result in a hard freeze.

All ideas for getting the system stable are appreciated! Not looking to overclock, just to stop the freezes.

David

Hello from Finland,

(I´m using PS3 now, because my PC is nuts. I installed ubuntu. This Linux on Playstation is nice and works great)

I got samekind of problem.

I just byed these parts;

Intel Core i7 860 CPU 2.8GHz with Hyper 212 Plus (idle ~30c)
ASUS P7P55D (not PRO) LGA 1156 Intel P55 ATX Intel Motherboard
A-Data 4GB kit DDR3 1333MHz+ Extreme Edition (AD31333EOO2GMU2)
Corsair HX650W ATX2.2 Power Supply, 80+

3 days of hard testing, all the time freezes sometimes and suddenly restarts.
System run usually under 10 minutes and something happens, but few times it was on close 1 hour. Strange.
Safe mode with Networking works, no freeze or suddenly restarts yet.
I Think the problem is MOBO, but tomorrow i'm going to local pc-store and they can test my memory.
I have tested my memory with Windows Memory Test Tool, no errors
Memtest86, latest(v3.5) burned on disc. Option with single core system or something like that, test starts but in few seconds whole system restart(?). Other option, multicore system, freezes immidiadely(?). Last option, run older version(v.3.4) works fine. I run test over and no errors(it takes about 1 hour).

I flash BIOS in latest 0711 ,if i remember correct numbers. Not help.

Sorry about my english.

All test with Windows 7 64-bit.(this OS can be installed)
I try to install Vista, but it won´t install, it freeze everytime in same place. Middle of the process.

Sometimes my keyboard stop posting in "start windows normally/safe mode screen" (only reset will help)

Two time windows have make black screens and after that it tells me that it has lost nvidia or something of the gpu, but it is recovered.

This is kind weird, dunno what to do. Buy other MOBO?

Sorry i don´t have solution, but i wish i can get. More testing. I will post here future what happens.

All temps are OK.

A-data has lifetime warranty. I visit in the pc-store and they tested my memory kit, they was faulty.
The store give me brand new A-data memory kit. I came home, installed dimms and everything works fine now! (so far )

My problem was MEM.

I hope you can get your system stable too.

System works now great, no problems. I run 3DMark06, everything ok. With old mem 3DMark freezes at Canyon Flight. Computer has been on many hours now.

Maybe your problem is memory too, can you test with another dimms?

Thats for sure, W7 don´t like old parts. In my opinion, i won´t even install W7 if i have 1 year or older parts.
Are you going to buy new W7 supported WLAN card? Is this old card it on your system now?