8KHA+ problem

[WinXP]

Just recieved a new 8KHA+ an having reboot problems even with 8KHAL00 bios. When it trys to resart it goes straight to ff. Tried reset button an nothing happens.(no reboot) Have to use power button an hold it in till it shuts off. Hit power button again, it may resart or not an have to got thru same procedure to shut down. It may take a couple time but it will resart. This at default not overclocked. (133 fsb) Have tried 3 different bios's an same situation. Not quite as easy as 8K7A+ was to install an use, but sure it can be fixed just need a little help. I am back to the beta bios now.

400watt antec +5v-5.11 +12v 12.28

[EPoX Tech]

Could you check to see if this problem is still apparent when powering the board on top of a book outside of the case using a short across terminals to power the board.

This can prove if the case or front panel connectors are an issue in this instance.

Please note that the 5v rail meausrement of 5.11v may not be of any relevance. 5v rail importance is related to current strength and current stability - not just voltage level.

[WinXP]

I believe the problem is a heat issue on mobo. I noticed last night if I shutdown an left off for a few minutes , it would boot fine. This morning when powering up no problem an restart 4 times no problem. But after 30 minutes it will not reboot without going to ff an not restarting. Shut down for a few minutes an will boot ok , just can't do a restart. I am water cooling so there are no fans blowing on mobo, will put some fans blowing on mobo today an see if problem disappears.

[Paul.K]

Give us some information regarding your CPU and motherboard temperatures at load and idle states?????


Paul.K

PS It does sound like a temperature related problem. Do you have your waterblock properly installed on top of your CPU....

[WinXP]

There is a black chip at upper left hand corner of motherboard. It is about a 1" long an 3/8" wide. Has cs5301 marked on it. I measured temp of it with a digital probe an temp was 73c. I have put a 60 mm ys tech fan blowing on it an now not having any reboot issues. So far running 175fsb. Cooling this chip has stoped my not rebooting problem so far. Been running for an hour now an will restart every time before after 15 minutes it would not restart. Have not remeasure temp of chip yet.

[WinXP]

Well this is one crazy mobo. My reboot problems are gone, everytime I do a restart. It boots up fine even from bios. It will max the fsb options at 210fsb an run an reboot fine at 210fsb.

I disconnected the fan blowing on the cs5301 chip an rebooting problems started all over again at default speed. Now have it reconnected an blowing on cs5301 an reboots fine. This chip get to hot an maybe the rebooting problems I have read about.

http://www.geocities.com/winxp/Bench...?1008300052759

[Wa11y]

Does the manual tell you what the chip is for?

[Paul.K]

Hi WinXP,

Now the chip in question is the voltage regulator chip (CS5301). Yes this chip does run hot after a while, however your temperature reading of 72C is way to hot. There is only one explanation for this, have you performed the Vcore mod on this chip. The extra current from the Vcore mod to pin 2 could be the cause of the extra heat you are encountering. I would also recommend placing a small heatsink (e.g modified ramsink) onto this chip and then have the fan blowing onto the heatsink. Also WinXP what is your temperatures of your CPU and mainboard from your hardware monitoring software....


Paul.K

[WinXP]

I have performed no vcore mod on this mobo, I just recieved it yesterday afternoon an installed an loaded win 2000. My vcore max in mbm5 is 1.89v.

Mobo temp 35c idle 41c load
Mainboard 32c
amibent 28c