Here's a weird one that has been plaguing my system -- challenge time!
Posted on 2003-03-21
I have seen this alluded to before by doing a Google search, but no solutions found yet.
System specs: ASUS P4PE MB, P4 2.533 Ghz CPU, 533 Mhz FSB
RAM -- 1024 MB SDRAM PC2700 (two 512 sticks)Kingston
Video -- ATI 9700 Pro
PSU -- Antec TruPower 430W
I get an intermittent error before POST. Hard drives spin, CDROM and DVDROM spin, lights go on. Monitor fails to go on. No beeps at all from mobo. No sound at all. If left alone, all other devices spin happily but do nothing. Monitor powers up but blinks on test screen.
Sometimes pressing reset button works. Sometimes cold reboot is necessary. Most (not all of the time), at reboot a message pops up:
"during the last boot up your system hung for improper frequency
combination. Your system is now working in safe mode. To optimise system
performance and reliability make sure the frequency combination conforms to
the specifications of your CPU, DIMM and other connected devices"
I change nothing in BIOS, reboot, and it works fine. Weird. Intermittent only.
Relevant BIOS settings: CPU speed manual(setting manually seemed to make this less common)
CPU frequency multiple 19x
CPU external frequency 133
Memory frequency 333
Attempts: swapping RAM with different speeds (not brands, all were kingston), new PSU, new video card (was Ti4600, like the 9700 much better), and testing with CPU and RAM torture tests. Max CPU temps I have noted ever (if it matters at boot up) is 62 degrees during a torture test. Usually runs at 50 degrees while gaming etc.
Any ideas? at this point it is so intermittent it is not causing problems per se, and not getting more frequent....I would like to know what the hell is going on :)