I have a Sempron 64 2600+ CPU (1.6GHz, 200FSB) on an Asus K8N4-E Deluxe motherboard (nForce4).
I've been running it with DDR266 with no problems at 2.0GHz, 250FSB.
I bought some new DDR400 left settings at auto, detected as "DDR400", and it has trouble booting. I manage to get it to boot MEMTEST86 and there are memory errors galore.
So I slow the CPU back down to 1.6GHz, 200FSB, and now the memory tests out perfectly!
I speed the CPU back up to 250FSB, but slow the memory down to 166MHz. MEMTEST86 runs 6-passes and everything is fine, but WinXP crashes when I get into Word. If I drop the RAM down to 133, then everything is fine.
So now I start to think, maybe the BIOS settings says the memory is "133,166,200", but really it's just a ratio of the FSB. So maybe with FSB oc'd to 250, "200" is really 250, 166 is really 207, 133 is really 166? Using that theory, I dropped FSB down to 240, thinking that would make the 166 setting really 200. Everything seems fine now.
BUT, the AMDCPU utility says the memory bus is running at 166MHz - I don't know if that's calculated or comes from the BIOS. Anyway, it seems like the only explanation for why the RAM doesn't work, is if my theory about the RAM speed settings is true, that they're really just a ratio of FSB and not truly the speed it says.
Can anyone help shed some light on this? Also, what are the HT0 HT1 HT2 HT3 ratings in AMDCPU?
I've been running it with DDR266 with no problems at 2.0GHz, 250FSB.
I bought some new DDR400 left settings at auto, detected as "DDR400", and it has trouble booting. I manage to get it to boot MEMTEST86 and there are memory errors galore.
So I slow the CPU back down to 1.6GHz, 200FSB, and now the memory tests out perfectly!
I speed the CPU back up to 250FSB, but slow the memory down to 166MHz. MEMTEST86 runs 6-passes and everything is fine, but WinXP crashes when I get into Word. If I drop the RAM down to 133, then everything is fine.
So now I start to think, maybe the BIOS settings says the memory is "133,166,200", but really it's just a ratio of the FSB. So maybe with FSB oc'd to 250, "200" is really 250, 166 is really 207, 133 is really 166? Using that theory, I dropped FSB down to 240, thinking that would make the 166 setting really 200. Everything seems fine now.
BUT, the AMDCPU utility says the memory bus is running at 166MHz - I don't know if that's calculated or comes from the BIOS. Anyway, it seems like the only explanation for why the RAM doesn't work, is if my theory about the RAM speed settings is true, that they're really just a ratio of FSB and not truly the speed it says.
Can anyone help shed some light on this? Also, what are the HT0 HT1 HT2 HT3 ratings in AMDCPU?
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