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Date: | Tue, 21 Jul 1998 13:50:40 +0200 |
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Hi PCBuilders,
I have a P166MMX system with a clone 430TX mobo, AMI BIOS,
3.2GB Quantum Fireball SE with UDMA and a Virge DX graphics
card, running Win95 OSR2 and FAT32. The system shipped with
16 MB FPM SIMMs.
One month ago I installed two 32MB SDRAM DIMMs and got rid of
the older SIMMs. The system booted up, memory tests ok and
everything was fine, but since then I experience random lockups
and/or resets or random weird MS blue screens referring to
invalid page address.
Now I think the memory upgrade is the most likely offender :)
But I am baffled by memory and system tests which report no
memory error: I also tried DOS 6.22 HIMEM.SYS which reported
no problem.
I can have DIMM replaced if they prove defective, but how is
possible memory fails without affecting sys tests ? It is
possible to test system memory in a more thorough way than
BIOS does without resorting to hardware probes ?
Other possible offenders could be:
- BIOS settings ? I did not change anything in BIOS after upgrade,
leaving memory options on Auto.
- DIMM voltage ? Mobo has a jumper referring to memory voltage
rating which, according to mobo doc, should be set to 3.3V
for SDRAM, I checked and it was already set on 3.3 V, so i left
it unchanged.
- Grounding ? I had to dismantle the mobo to gain access to DIMM
slots (talk about cheap PC clones) and maybe I got something
wrong in reassembling it.
I'd like to know if someone else experienced similar problems
after a RAM upgrade, and if there exists a utlility which really
tests all systems memory.
Thank you in advance for your help
*******************************************************
Gianluca Zanetti Breda Costruzione Ferroviarie
[log in to unmask] Via Ciliegiole 110b
tel +39 573 370581 51100 Pistoia (PT)
fax +39 573 370292 Italia
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