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Cannot get NF7 stable - please help

M

Mark R

Diamond Member
After a lot of argument with my brother over what PCs to build, I'm now stuck with 3 PCs based on NF7 Rev 1.2 motherboards.

The problem is, is that all 3 fail stability tests (prime95 and memtest).

Specifications:
Abit NF7 Rev 1.2
AMD Athlon XP 2500+
Twinmos PC2700 CL2.5 512 MB (1 off)
Supportive components as required (all of adequate quality and correctly installed)

BIOS settings (fail-safe/optimal) make no difference. Underclocking the CPU, FSB or memory speed makes no difference.

The errors in Memtest are totally random, and do not always occurr - sometimes memtest will run for 6 hours without error. Other times it will find dozens of errors in the first pass. On average however, it is 1 error per pass (usually in test 6). There appears to be nothing in the errors that would locate the fault to either a specific chip or range of memory locations.

Prime95 will run for various amounts of time - approx 1 hour on average, but varying from 5 mins, to 10 hours.

I've swapped the RAM between the computers with no difference as far as I can tell. I've even tried an old (known fully working) Thunderbird 1000 MHz, also with no difference.

It seems unlikely that the fault is in the CPUs - so I'm now stuck. Where do I go from here? Buy some uber-RAM and see what happens? Dump the boards on e-bay and get some MSI boards?
 
Tried checking the abit forums see if someone else had the same problem but forums are down. At the amdmb forums someone had a rev 2.0 that ran better with the memory
set aggresive. amdmb thread
 
Anyone got any ideas? The guys at amdmb have no idea.

This is really starting to bug me - I really don't want to throw more money at the problem, I've already spent well over $2k for these systems.

My retailer is going to think I'm having a laugh if I try to RMA 3 motherboards, especially as it is only in-depth testing that reveals the problem.

Guess I need to find someone who can loan me some RAM.
 
I've now tried one motherboard with different RAM (Crucial) which is on the recommended list. Again, no difference.

This seems to be hard evidence that all 3 motherboards are, in fact, defective. Speaks volumes for Abit's quality control.
 
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