NeedaComputer

I'm confused about readings I'm getting about memory amount and speed. I have 4x1GB DDR2-800 set to (4-4-4-12-2T; 2.1V)

Memtest+86 shows:
3327M 3000MB/s
RAM: 442 MHz (CPU/5)(DDR 884)/CAS: 4-4-4-12/DDR-2 (128 bit)

CPU-z shows:
368 MHz (CPU/6)

I have set my timings in accordance with EPP#1 settings in CPU-z SPD tab (4-4-4-12-22-2T). These are the settings Corsair recommends.

I ran Memtest for 2 1/4 hrs, 1 pass, 72% on 2nd with no errors. But I cannot run XP Pro for more than 2-5 hrs without a random reboot.

The system runs fine when all bios settings are set to auto (JEDEC#2 5-5-5-18-22) But it will set 22 to 23 instead.

I know I'm rambling but I'm hoping someone can see what's going on here and maybe point me in the right direction.

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AMD Athlon64 3500+ Orleans
MSI K9N Neo (MS-7260 - nForce 550)
Corsair XMS2-DHX DDR2 800mhz (4x1GB)(4-4-4-12-2T)
MSI GeForce 6600 - 256MB 128bit
XClio 450BL
WD Caviar SE16 - 250GB 16MB 7200RPM 3GB/s
WD Caviar SE16 - 500GB 16MB 7200RPM 3GB/s