Dear all who replied,
On Sunday 19 February 2006 19:53, Rikard Johnels wrote:
Even memtest sometimes fail detecting Tried using the 2's independent? Install om A and swap it for B and reinstall? (Didn't really understand if you had...) Are they the same types? Or is it mixed manufacturers/models? Some MB's are very particular on the flavor of the sticks
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It is extremely unlikely that the memory is fine and that two completely different motherboards are exhibiting identical symptoms -- even if they're using the same chipset.
One possible scenario:
Mixing and matching sticks from different manufacturers on high end machines like this is asking for trouble. Even when the specs "match" one brand can test and run OK, then the other brand can test and run OK, but both installed can generate a disparate "blend" of noise in the memory bus that confuses the surrounding logic. Each stick has a distinctive noise 'signature' and you want those signatures match... to be synchronized with each other... as closely as possible.
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Assuming that all of the ram has passed memtest (and it seems that it has), I think I'd look at the bios on the main board - I know in the past there have been situations where unusual hardware configs were just plain not tested for by bios manufacturers, although there was no real reason why they shouldn't work. Manufacturer and version of the rom? Is there a newer version that you can flash and try?
Thanks for all the suggestions, although I am not sure they will help. To clarify the memory situation. The memory is two sets of matched Dual Channel DDR from Rosewill. In other words, I purchased two sets of identical memory. Two sticks of 1 GB memory (2 GB) were packaged together and certified as Dual Channel DDR, with a lifetime warranty. I purchased two such packages for a total of 4 GB. Let's call the packages A and B. Package A passes Memtest whether it is in DIMM 1 &2, or DIMM 3 &4. Package B passes Memtest whether it is in DIMM 1 &2, or DIMM 3 &4. Since I couldn't install with 4 GB, I installed with package A in DIMM 1 & 2. I ahve not tried installing with just 2 GB in DIMM 3 &4, but it did pass Memtest in those slots. The motherboard, an Eox 9NPA Ultra, nforce4 chipset, came with a BIOS dated 6/29/05. The latest BIOS on the web site is dated 12/9/05, and I flashed the BIOS with that version. The motherboard thus has the latest BIOS available. The specs for the motherboard indicate that if all 4 DIMM slots are populated, then the memory must run at 166 Mz as opposed to 200 Mz. The board seems to recognize this as the POST says "128 bit Dual channel DDR at 166 Mz" When only two DIMMs are used the POST screen says "128 bit dual channel DDR at 200 Mz. I suppose I would like to know if anyone has successfully installed SuSE on a system with 4 GB and an Athlon 64. I see that the Opteron CPU is available now in Socket 939, not just Socket 940. Would that help? Is there a difference in the onboard memory controller between the Opetron Socket 939 and the Athlon 64 socket 939? Mike -- Michael A. Coan Woodlawn Foundation 524 North Avenue, Suite 203 New Rochelle, NY 10801-3410 Tel 914-632-3778 Fax 914-632-5502