300A locks up after windows98 boot screen

[acts837]

I bought some paste today. Fixed up my 300A and put back in my Abit BH6. Booted up fine under normal settings. I then rebooted, went into my BIOS, changed FSB to 100, disabled error, and tried several times with different voltages (2, 2.1, 2.2). Every time I get past the post, past win98 splash screen, and then BAM! locks up with a black screen and my mouse cursor. Anyone seen this before.

[wild_andy_c]

Yah - in it's current state the chip will not do 100Mhz FSB. This is the way all chips crashed up til cC0 when they started to do different things instead.

More voltage, more cooling, more conservative memory settings, better thermal interface between cpu die and heatsink - these are the factors that you really need to look at.

Andrew Cotterill

[Phil]

have you set the agp divider to 2/3? if that isn't the problem then I guess your current cooling isn't good enough, some good thermal compound and maybe lapping the heatsink flat and the chip down to the copper layer will do it

[acts837]

Thanks Phil. Setting the AGP divider by 2/3 did it. Booted right up! Another question. When I had put my PIII 550 Katmai @ 100FSB in this Abit BH6 the video card worked great. Then with the 300A @ 450 (100 FSB) it wouldn't boot? Another thing. I downloaded MBM5 and it doesn't tell me my temp? Do I need to add a thermostat to my BH6 somehow?

[Phil]

thats because the board autodetects the fsb of the 550 as 100 and sets it up accordingly, i.e. with a 66mhz agp bus, where as with the 300 you are setting it manually so need to set the divider as well, you an force the board to detect it as a 100mhz fsb chip by covering pin b21 but this isn't necessary only if you reset your bios often and forget to change all the settings back, and as for the temp as far as I know some bh6's don't support reading the cpu's temp only the motherboard (I have a friend with one that doesn't any way) unless you buy one of those senfu sensor things you are just gonna have to settle for not knowing