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Wierd Asus a7n266 VM boot problem. works w/100 fsb but not 133

S

sample

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Someone please help me before i trash my board (Asus a7n266 VM). I can get the system up and running when i set the jumper switches for fsb 100 but when i change it to a fsb 133 the comp crashes right after the bios loads up and it does its standard check of hardware. It just freezes. If i try to enter bios, its good for a second but then the bios locks up again

I using a XP1700 retail that works fine on my AK31 and 256 of kingston ddr ram that also works on my ak31, everthing else is unplugged.

the verision of the bios is 1004

Thanx, any help will be greatly appreciated.

sample
 
What's the specs of the whole system, and especially the power supply brand/model? Also, are you aware that the jumpers are depicted upside down in the manual (although I hear they're inserting a correction leaflet now)?
 
Well i'm running on w/ 350 antec (forget which model) ps and well there notthing else plugged in except for the ram and cpu. and yeah i'm aware of the switched jumpers. The speeds are confirmed but bios right before it freezes/ =🙂disgust:😀:|
 
Ok, good deal... name-brand PSU, name-brand RAM... hmm, could your heatsink be reversed? Although that would typically cause C.O.P. to shut the board down completely, as if you'd pulled the plug out of the wall. There's a good heatsink-installation guide here that I refer people to a lot if it sounds like the heatsink could be reversed.

Also, if you have any Crucial PC2100 laying around, you might try that instead. Ours use Crucial and I haven't had any problems with it. You might try clearing the CMOS with a paper clip if nothing else is helping.
 
Ugh no crucial but i have 3 sticks for kingston that all work with my ak31 (2100-2700) and they all dont work. Reset the cmos, doesnt do jack. The funny thing is it works when i set the fsb 100 by the jumpers and then its solid as a rock. but freezes up in 3-5 secs on fsb 133. wierd eh?
 
Odd. And the CPU still works normally on the AK31. 😕

Just to confirm, you've got both jumpers capping the pins on the left, correct? That would be 133/133 RAM/CPU. If you felt like experimenting, you could try setting the memory to 100 and the CPU to 133 and see if it would even POST that way, or vice versa. Sorry I don't have any other great ideas 🙁
 
yeah i tried all that... =( thanx alot mech... you think it could be a heating issue? i mean does an xp run hotter on 100 FSB vs 133FSB... I just flashed the bios and still no go.. again thanx for the time.. =(
 
the retail xp fan... which is the one i used on ak31. yikes.. on 100 fsb the temps read 55c. but that shouldnt make a fsb 133 unstable and a fsb100 stable?
 
And you're positive it's on in the correct orientation? Typical idle temps in the BIOS are 40-42C at the 133MHz bus speed with the retail heatsink/fan unit on our 1800+'s. If installed correctly, the end of the clip with the screwdriver-tip receptacle will be at the top side, facing the PSU, exactly where it's sooooo hard to get a screwdriver to 😛

If the unit is reversed, the heatsink will not be able to land flat on the CPU core, causing a guaranteed overheat situation.
 
yeah i'm positive i but the hs in right.. just triple checked it. hmmm.... but i do agree with you that its a really high temp... hmmm... so do u get a increase in temp w/ 100 to 133 increase?
 
Originally posted by: sample
yeah i'm positive i but the hs in right.. just triple checked it. hmmm.... but i do agree with you that its a really high temp... hmmm... so do u get a increase in temp w/ 100 to 133 increase?
Click to expand...
Yeah, because the CPU runs proportionately faster and the heat production goes up that much.

The thermal patch on the CPU is a one-shot deal, it melts to fit when the system is first started, and if you take off the heatsink after that, then it's best to scrape off the pad completely and start using thermal grease (good quality stuff and not the chintzy stuff like Radio Shack sells these days). That could contribute to an overheat situation, if it needs something to bridge the gap between core and heatsink.

I also forgot to take the plastic slip off of a retail AMD thermal pad once 😱 Did you take that plastic cover slip off of yours?
 
yeah i used artic sliver w/ it... but it looks like the heatsink is a little loose for some strange reason. maybe i bent the clip... booo... anyways i think you are right. Its a heat issue. hopefully at least. thanx will post if it I get it to post

 
Aha, I think you're onto it. If the clip isn't exerting enough pressure to compress the corner cushions on the CPU, then it won't make good firm contact with the CPU core. Maybe boost up its strength a bit, or try a different one if you have one.
 
YEAH!!! Hey thanx alot mech. It was like you said. heat=bad. I tried a spare clip i had around and the temps dropped 15c and booted up fine at 133. Thanx for helping this noob... =)

sample!!
 
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