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memtest failed on Phenom 1090T on M4A89GTD PRO/USB3 with KNX1600C8D3K2/4GX

post #1 of 3
Thread Starter 
Hi, please help me understant a problem with my PC.

I have confiuration:
CPU: AMD Phenom II 1090T 3.2Mhz (nominal mode);
MB: Asus M4A89GTD PRO/USB3 (w/o overclocking);
RAM: Kingston KHX1600C8D3K2/4GX (4x2G, total 8GB, all banks filled);
VIDEO CARD: onboard;
HDD: Seagate green 2Tb;
OOD: 1xDVD-CDRW, 1-DVDRW;
FANS: 3x80mm;
PSU: Cooler Master RS-450ACLY (450W) (also tried Chieeftec APS-500S).

First of all when my system can't resumed after long time being in hibernate (Win7), and only resumed after reset pressing I decide to check first of all HDD and RAM.
Checking of HDD done with no problem. Then I launched memtest86+ v4.20 for each RAM kit (2x2GB) in each bank (firstly in A and then in B) for long period of time - 24h.
Continuous tests passed with no errors. When I set both RAM kits in all banks, memtest has not passed. Error 1 usually at the size 6912.9 MB (good ffffffff bad fffffff7f) when test run for a long time.
Time when error appears depend of BIOS version. For latest BIOS 3029 test failed after 20-30 minutes, for previous version 2301 it failed after 11 hours,
for oldest version 1606 it failes usually later - after 19 hours. I confused what is wrong with PC components. Is it problem in MOBO,
CPU or memory modules (but they passes tests separately even for 24 hour). In BIOS I only had set timings 8-8-8-24 (according to Kingston specification) and DRAM frequency to 1600 Mhz,
with voltage - 1.65v (also to specification values).

P.S. For timings 9-9-9-24 (all auto in BIOS) memtest passed even for long time - 24 hours as minimum.
Sincerelly grateful for helping.
post #2 of 3
Hey man

Ok, I'm personally going to put it down to the fact that you have all the banks populated. Basically if you were to have 2x4gb instead of 4x2gb it would put less stress on your memory controller, ergo not causing it to error.

The only thing I could really say is either replace the memory with an 8gb kit or drop the timings down to 9-9-9-24. It's really the same theory which is on the i7/i5 processors, if you have 8gb of memory you'll get a 4ghz OC, if you have 16Gb of memory you might only get 3.8ghz. It's because of the stress on the IMC.

Comps
post #3 of 3
Thread Starter 
The only strange thing is that the my Phenom II 1090T (whic have IMC) is working in nominal mode, w/o oveclocking. Maybe this is because my mobo or CPU is broken?
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