Overclock by fsb question

[JCB]

You can't push the Tyan 1598 past 100fsb. You have to use the multiplier. If it didn't hit at 5x100 @ 2/7v. I'd say that you're out of luck. You could try lapping the cap or pooping it off to get the temps down, and try again.

[krusty the klown]

Scotter is our local resident K6 Overclo><or Guru.

You may find some useful tips on his site here: http://www.comppwizz.com/

[Bruneaux]

That thing should do at least 500. You have to set the multiplier to 5x to get there. Did you forget something?

[Bovon]

Okedoke, and thanks for the input. I kinda figured the Tyan wouldn't do over 100 mhz fsb, but some will...and the jumpers are not documented in the manual.

Yup, I did the 5 X 100 bit, and got it to 500 mhz ok...and on a drive I had that I use to test boards with that already has Win98 loaded...it did fine at 2.7 Vcore...seemed stable, but then I started in with the new hard drive, fdisked, formatted and started loading Windows. I hit so many snags that I finally gave up and returned it to 4.5 X 100, and its purring like a kitten ever sence. So, I wouldn't put it back after that, and I think probably 2.8 or 9 might make it stable enough, but I am not gonna go buy a better HSF to do that with, with K6-2 500s at $29 bucks now, and coming down...I would just get a new cpu first.

[Bovon]

JCB, how do you know that the Tyan cannot be pushed beyond 100 mhz fsb?...has it been tried to your knowledge?.

I see at least 2 jumper settings that are not listed in the manual as used. This was the same with my FIC 503+, except when I bought it, there was a loose page attendum that noted the extra jumpers that were not on the page in the book.

If you, or somebody knows that these extra jumper settings will not create a higher fsb, good enough...but, they just might work.

Here is what is listed in the manual:

There are three...3 pin blocks.
-----------JP4----JP5--------JP6
60 mhz = 2 to 3, 2 to 3 and 2 to 3
66 mhz = 1 to 2, 2 to 3 and 2 to 3
75 mhz = 1 to 2, 1 to 2 and 2 to 3
83 mhz = 1 to 2, 2 to 3 and 1 to 2
95 mhz = 2 to 3, 1 to 2 and 1 to 2
100 mhz= 1 to 2, 1 to 2 and 1 to 2

This leaves 2 possibles:

-----------JP4-----JP5--------JP6
Unk mhz = 2 to 3, 1 to 2 and 2 to 3
Unk mhz = 2 to 3, 2 to 3 and 1 to 2

[This message has been edited by Bovon (edited 07-10-2001).]

[Bovon]

I have a K6-2 450 on a Tyan S1598. I tried to O/C to 500 by Vcore, but stopped at 2.7 volts. The reason for that is, the machine is for my daughter in another state, and I do not have a HD sink to put on it for the increased heat from higher Vcore.

If I O/C by fsb (and I am not certain at this point if the Tyan will go over 100 fsb, its not documented in the manual) do I still need to raise Vcore?..

I have not tried any O/C by fsb, and don't recall reading anything about that concerning Vcore voltage.

Thoughts?