- Aug 25, 2001
- 56,587
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Well, I started getting some IRQL_LESS_THAN_OR_EQUAL BSODs and some application errors on my HTPC, so I started investigating. Prime95 SmallFFTs ran overnight without errors. But Memtest86+ 4.10 showed some errors immediately.
The strange thing is, M86+ said that my RAM was running at 575Mhz. Way out of spec. I have the the RAM speed set to 800Mhz in the BIOS, with "manual" setting. BIOS displays "DCT0=800Mhz" when booting.
Oh yeah, the rig is a Foxconn A7GM-S 780G mobo, with a BE-2400 CPU. Overclocked to 250FSB, so 2.875Ghz, with an 11.5 multi. Now, I know that the memory ratios for AM2 chips with half-multis are wierd. I remember reading a chart showing the effects on AT's web site, and to make a long story short, the RAM speeds are slightly underclocked with a half-multi, compared to what you would get with a full multi and that RAM divisor.
So, I managed to set my RAM speed downward to 667 in the BIOS, and now M86+ displays the RAM speed as 479Mhz, and this time, no errors. But upon booting WinXP SP3, and running a relatively recent copy of CPU-Z, it says that my RAM is running at 410Mhz.
So which util is right, and which one is buggy?
RAM is 2x1GB Crucial Ballistix Tracers, which have an EPP profile in the SPD for DDR2-1000 5-5-5-15 @ 2.0v, so they can definately handle the speed, once I adjusted it to something below DDR2-1000.
The strange thing is, M86+ said that my RAM was running at 575Mhz. Way out of spec. I have the the RAM speed set to 800Mhz in the BIOS, with "manual" setting. BIOS displays "DCT0=800Mhz" when booting.
Oh yeah, the rig is a Foxconn A7GM-S 780G mobo, with a BE-2400 CPU. Overclocked to 250FSB, so 2.875Ghz, with an 11.5 multi. Now, I know that the memory ratios for AM2 chips with half-multis are wierd. I remember reading a chart showing the effects on AT's web site, and to make a long story short, the RAM speeds are slightly underclocked with a half-multi, compared to what you would get with a full multi and that RAM divisor.
So, I managed to set my RAM speed downward to 667 in the BIOS, and now M86+ displays the RAM speed as 479Mhz, and this time, no errors. But upon booting WinXP SP3, and running a relatively recent copy of CPU-Z, it says that my RAM is running at 410Mhz.
So which util is right, and which one is buggy?
RAM is 2x1GB Crucial Ballistix Tracers, which have an EPP profile in the SPD for DDR2-1000 5-5-5-15 @ 2.0v, so they can definately handle the speed, once I adjusted it to something below DDR2-1000.
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