k6-III 450Mhz how much should i get

[demon-eater]

Hi im fixing a k6-III 450mhz for a friend and i wanted to give them more power how fast do you think i can out of this im gonna put a better hsf on it cause the one right now isn't even acceptable for me underclocked at 400mhz with the volt at 2.2 its running 51 idle i think.. i know bios temps are usually off but still i like to see thema t 40 or lower when at idle..

[WillysNut]

demon-eater, check out the CPU Database (http://overclockers.cssftware.com/cpudb/index.cfm) on the main page. That should give you a good idea of what people are using and the speeds they're achieving.

Looks like the 500-600MHz mark looks pretty do-able, of course depending on how good the cooling is and the general setup. Good luck. Sounds like your doing a good thing for your friend! :)

[eobard]

First I suggest checking the cpu data base for a good idea of what to expect. If you aren't going to put much effort into it then you should get 500 but probably not anything more. To get my K6II 450 to 560 I did this:
1) Increased the voltage to 2.5v
2) Removed the sink and the aluminum cap on top of the chip. Then I lapped the sink.
3) I lapped a copper coin on both sides and put generic thermal goop on both sides of the coin and then put it between the chip core and the aluminum heatsink.
4) I rounded my cables. That probably didn't help but it can't hurt and you never know, that little bit of extra air flow my just make the difference!
5) I put a duct on the side of the case to allow the cpu fan to draw cooler air directly from outside the case to the heatsink without recirculating air from within the case to cool the chip.

I don't have a temperature probe for my K6 but the duct trick gave me a 6c drop on my Duron so I suspect a similar benefit occured in my K6 too. You also might want to get a socket A sink, I'm going to get one for my system soon and I know others have gotten better results than me with socket A sinks on their systems.

Good luck.

[demon-eater]

yeah thats what i was going to do was get a socket A hsf for him... and yeah it won't post when i try for 500mhz on 2.4v ill try 2.5 but watch my heat at the same time.. thanks

[eobard]

My personal comfort level was 2.7v but everyone must decide for themselves. If you're working with a "+" chip remember they have a lower base voltage to start.

[samuknow]

I ran a K6 II 450 @ 558. (4.5x124) Did ok but needed 2.8v to start. Also ran HOT. Lots of HS and case cooling. Your lucky if you get 100 mhz OC out of it.


Good luck

[demon-eater]

i can't get it to do poop with the stock hsf... im gonna go buy a generic athlon hsf and then see if that helps