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"Richard Lucking" <lists@×××××××.org> posted |
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01f501c68ce6$91c80790$d800a8c0@×××.cxm, excerpted below, on Sun, 11 Jun |
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2006 00:35:33 +0100: |
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> Thanks for the suggestion. They are 4 matching 1GB sticks from Crucial. It's |
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> worked perfectly today with any 2 of them - just not when I fit all 4. |
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> |
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> It didn't work *at all* when I first put in 4GB, I had to recompile the |
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> kernel with IOMMU options - now it works, just not under "load". |
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That sounds very much like... |
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I don't remember exactly what it's called and it may be slightly different |
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in your bios anyway, but... |
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Under the memory timings options, here, it's only visible if I toggle to |
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manual and get the individual settings... |
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There's a setting command length or command size or some such, IIRC, with |
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what should be only two settings, 1T and 2T. If you have all memory slots |
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full, it must be 2T, otherwise 1T works fine and is faster. |
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It sounds like either automatic isn't getting it right, or you had it set |
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for 1T previously and haven't reset it for 2T. |
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If that doesn't do it and you have the option, try declocking your memory |
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a bit. I had some generic RAM before my last upgrade that was rated |
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PC3200, that would randomly lockup at that. As you, memtest86 was |
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100% clean, and the lockups were usually under load. When I first got |
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the memory at the same time I got the board but from a different supplier), |
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the BIOS didn't have a memory clock limit option, but a BIOS upgrade added |
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it. PC3200 is 200MHz clock DDR, so 400MHz memory. When I clock-limited it |
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to 183MHz DDR (366MHz, comparable to PC3000), it was solid as a rock. No |
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more instabilities, even with tighter than either memory-default or |
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BIOS-default timings. |
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Something else that /might/ be it, altho here the IOMMU and AGPGART |
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wouldn't work /at/ /all/, as in the thing would lockup after loading the |
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kernel but before loading init if I had it on and either of the above |
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enabled, it wasn't a random problem at all... the BIOS AGP fast-write. |
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(I've no idea at all if this applies to PCI-E.) With it disabled, both |
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the above worked as they should. |
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-- |
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Duncan - List replies preferred. No HTML msgs. |
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"Every nonfree program has a lord, a master -- |
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and if you use the program, he is your master." Richard Stallman |
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-- |
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