high overclocking

[catcorpse]

why is it when I overclock my 1.33 chip anyhigher than 1590, the hard drive "dissapears". the machine will post, and to the deal, but it won't find the hard drive. I can get to dos and find my cd-rom, so is it a setting in my computer? I have an Iwill kk266 plus, gxp 75 30 gig, win 98 SE, 512 megs of OCZ performance, yada yada I have had it post into 1700!!!! but I can't get it to see the hard drive. Any help would be much apreciated.

[miller]

I think thats just a bug in the Iwill board, I had a similar expierence with my Iwill and have yet to find a fix for it besides loosing a few more mhz. :(

[catcorpse]

do you think that if I use an add on raid card that I could pass the barrier that I have found with the Iwill? I know I should be happy, but I am not ;)

[miller]

An add on RAID card might be able to fix the problem but first what FSB and multiplier settings are you using? If your using a high FSB that might by why the hd dissappears, so you could just raise the multiplier and use a little bit lower FSB to fix the problem.

[lurch63]

yeah i'd go with what miller said, if the hard drive buss speed goes too far out of spec you could run into timing problems, heck with anything, but if the cpu wants to go put it up heck 12.5*133 is 1662.5mhz which is pretty nice and there is no extra strain on any of your periphs, but the add on raid controller would be nice , heck even an add on ata100 controller might clean it up if you don't got the cash for a raid, but i'd go for the raid, and since built in raid controllers and add-ons are all on the pci bus as long as you put it in a slot that doesn't have a shared irq you shouldn't see much of a speed difference from the built in, i haven't confirmed this , but it makes sense in theory, so good luck, lurch

[catcorpse]

the highest on the FSB is 159, and I have used up to a 12, and it seems to be a 1600 barrier, I have tried a low FSB and high multi, but that also seems to hit a wall. I have not upped the Vcore any, not yet atleast. I know that there is also one more switch that I can throw on the mobo to provide more power, and I havn't thrown the jumper yet. I might just have to try it.

[miller]

Definitly use more voltage to the cpu thats what will probely fix your problem and let you past 1600mhz... :eek:

[AmStoned]

Hmm... You know, it could be the IBM HD. Used to do RAID with my KT7R board with a pair of GXP75s, and whenever I take the FSB up, I'll get the broken strip or no system disk message. But like miller said, it could also be the Iwill board. Have you thought about trying another board?

[catcorpse]

hhhmmmm another board, but what to get? I don't have acess to another board around here, all I have is 2 iwills, unless I could fit the chip on my slot FIC mobo:lol: I am going to try and juice it right now.

[catcorpse]

I tried these combo's with V-core at 1.85 and the I/o voltage upped 10%
133x11.5 1.53 didn't see HD
139x160-1.6 didn't see HD
150x10.5 1.57
158 X 10 ran, locked up after a few minutes
160x9.5 1.52 ran, but everything ran in slow motion
140x11.5 didn't see HD

I did more, but you get the picture. It would post and go upto where it tried to load the win 98 drivers. Then it would tell me it didn't see the dick and to load the system disk in the cd-rom/a drive. Higher multiplyers for some reason didn't work this time around. Right now I am at 10x140 running ud all night long, but that sucks.

[AmStoned]

Weeeeeak.... Okay, have you tried another brand of HD? Boot with no sound card, no NIC, just video and HD.

[catcorpse]

Western Digital 40 gig, but I did have my Netgear nic (onboard sound).

mabey this setup just isn't good enough. I will have to try something different.