K6-2 400, trying for 450

[Tracker]

Ok I have a 400mhz k6-2 trying to get 450mhz out of it. I have got a pretty large heatsink fan with thermal paste on it and a little cpu fan plowing right beside of it towards the cpu and motherboard. I have the volts at 2.3 that is all I can do unless I go to 2.8 (not happening). Right now the room temp is 65 degrees and it is running at 450 with the case on, had some troubles at start but now it is ok I think. I plan on leaving it running day and night for a while to get it broke in at this speed, sound good? Do you think that it is going to stablize itself out or it will never stay good at this speed.
I kinda like the new benchmarks at this speed.
WinTune : (400mhz:880MIPS, Floating Point 463MFLOPS) (450mhz:992MIPS, Floating Point 522MFLOPS)

[This message has been edited by Tracker (edited 10-02-99).]

[RobRich]

I've seen stranger things happen, but I doubt if you will ever see 450. Default for the cxt k6-2 is 2.4 volts. AMD specs say 2.3 to 2.5 normal, but for o/c'ing it usually 2.5 to 2.7. Have you checked what brand of m/b you have. Several have unlisted jumper settings for these voltages. Find out the brand and check their web site.

[Tracker]

I have an Acer board that I know all about the settings, but the thing I am wanting to know is does anyone think that overtime it will totally satbilize itself if it keeps running at this speed and voltage. It is running it right now and those benchmarks show the improvement in the chip. It has been running for around 2 hours now with no problems. Going to let it run all night and all day until I see problems. Does that sound like it will work.

[lost1]

In my experience, you'll probably have to up the voltage a bit to get 100% reliability, and 450MHz from a 400 is a fairly reasonable goal. My 450 has been running stable 24/7 at 500MHz for over 3 months now @ 2.7v. If you REALLY want to test reliability, download the 3D Mark 99 Pro benchmark program (free), put the demo into loop mode and let it run for several hours. If it doesn't crash due to a system problem, then you have a fairly stable machine.
Hope this helps. Good luck /forum/smile.gif

[Ed_S]

I've got K6/2-400 (retail boxed) running totally stable at 450, 2.3 volts with stock fan. Been this way since early May, no problems whatsoever. Will boot & attempt to load W95b at 500, but no go at this voltage.
Haven't tried more because I'm OK with it like this. I'm confident it'll do it with a little more power if I want to.

Stock voltage for the K6-2's 400 and under is 2.2v. The 450 and up use 2.4v.

You shouldn't need to exceed 2.4v to run at 450 reliably, there's no way I'd give it 2.8!!

Did you check Acer's site for undocumented settings? Many times they'll post new stuff left out of the manual because it wasn't needed when printed. Surely they have 2.4v listed to support the 450 by now!

My Soyo manual jumps from 2.2 to 2.8 also, but the website lists settings from 2.0 to 3.5 in .1 increments

[Tracker]

There are no hidden voltage settings on my motherboard according to Acer themselves. I was wondering with that cooling scheme will it keep it fairly cool at 2.8 (using a large heatsink and thermal paste, a small fan blowing on motherboard and cpu, and a large case fan) it doesn't really bother me that the chip eventually burn up, because they are so cheap now. How long would the chip last by the way if it was run at 2.8v, and runs 24/7 basically.

[This message has been edited by Tracker (edited 10-02-99).]

[mjb]

What voltage settings does your board have? I have a K6-2 350 that I have run as high as 2.9v and have yet to smoke it (thank goodness). Anyway, when you get up to those high temps you need to make sure you're keeping the rascal cool. Maybe popping the cap on it would help keep it cool? Good luck.

[Tracker]

How bad would it be to run the 400 at 450 with 2.8 volts with large heatsink and fan with thermal paste on chip, small cpu fan blowing on motherboard and chip, and large case fan blowing around in the case. Will there still be too much heat or will it be ok at that voltage.

[lost1]

If it's stable, I would run it at 2.8 w/big fan & sink. It may last forever or nuke itself tomorrow- but when you can get a new K62/450 for 50 bucks online, it becomes a somewhat moot point! /forum/wink.gif
Good luck!

[axedawg]

From what I've read the AMD K6-2 requires 2.3v to 2.5v?? I have my K6-2 400 o'cd to 450 on a PCChips M590 motherboard at a cool 2.2v. Overclocked at 5.5 x 83.3=458Mhz but it boots as 450Mhz. Using a $3.50 heatsink/fan combo for cooling. The processor stays at room temperature, using the old finger touch method. If I run on a 100Mhz bus speed at any clock rate I get invalid page faults, I don't think my SDRAM is fast enough. Anywho, there's my two cents...