[FIXED] P4C800E + 2.6C persistently locks up in MemTest

[Leo V]

EDIT: Fixed by Yourself's advice - disabled Legacy USB support in the BIOS. Please take note for the future!

I am building a new rig using Asus P4C800E-deluxe with retail P4/2.6C, and cannot get even a single pass of MemTest86 (ver3.0 booting from CD) to complete without locking up.

The CPU is NOT even overclocked. I have reinstalled the CPU and diligently reapplied AS5 (the CPU doesn't even reach 45C). I have tried different memory (OCZ 3700 pair and Corsair 2x3500C2) and tried both using primary and secondary matched DIMM slots. I have tried two quality 300W PSUs (Seasonic and Antec). I have tried 2 different videocards from ATI and NVIDIA. To be sure, I have no other devices connected except the CD-ROM drive with bootable MemTest CD.

I have installed Asus's latest BIOS, and changed a bunch of BIOS settings (higher mem/CPU voltage, disabling features, etc).

Nothing seems to help, or has ANY effects whatsoever on MemTest's behavior - it reports no errors, but locks up randomly within 10-15 minutes.

The only things in common are the mobo and CPU. Any suggestions? Did anyone had similar MemTest lockups? Help!

Much thanks,
Leo

 

[RanDum72]

What speeds/timings are you running the memory?

 

[Leo V]

I've tried as conservative as it gets - 266mhz at cas 3448 and 2.5-337. At this point I'm seriously doubting that the memory has anything to do with it. I am starting to sustect the mobo (or even CPU) may just be defective...

I'll swap in a P4/1.6A later tonight and report what happens..

 

[Adul]

 

[wicktron]

Yeah. Maybe your board is just bum.

 

[Yourself]

Turn off legacy USB in your bios and you should be good to go.



Self

 

[Leo V]

Originally posted by: Yourself
Turn off legacy USB in your bios and you should be good to go.

Self

You must be a magician, because my problems magically disappeared after following your advice. For real. I owe you my deepest gratitude for the troubles you saved.

PS: Given your nickname, am I to say that I solved my problems Myself? Anyway, I was about to RMA the mobo, so major thanks for helping me out!

 

[Leo V]

Now cooking stable at 3.033ghz (default VCore) with 466mem @ 2.5-3-3-6-4 @2.65V, PAT/Turbo mode enabled. (I'm using 1GB OCZ 3700 Gold pair like Anand's review - it works as Anand suggested.

Going above 242fsb (3146mhz) required raising VCore, so I'm afraid my CPU cannot go much higher than 3.2ghz range. I prefer to stick with 3.033 @1.525Vcore using 1:1 aggressive memory. More results to follow later in sep thread on CPU forum...