Originally posted by: mackintire
When you run Memtest+
If all or some the memtests seem to randomly fail you may have a power supply issue.
Run test (2) and then (4) 20 passes If it fails you have a Northbridge/CPU issue
Run test (3) 20 passes If this test alone fails you have a L2 cache access problem. Sometime it shows up as a motherboard issue.
Run test (5) overnight IF this test fails you have a standard memory timing issue.
Run test (7) overnight If this test fails and the others pass you have a refresh memory timing issue. Usually fixed by a BIOS update, or by not overclocking.
If this all passes you do not have a memory subsystem issue.
Install Windows XP on the machine, Run Orthos, configure blend to use all the memory in the machine. Run this for 12 hours.
If this fails and all of Memtest passes you have a CPU issue or a POWER supply issue.
If all the above passes then you have either a motherboard I/O controller issue, bad cable or bad hard drive.