Overclocked k6/2 300

[spickee]

I have managed to overclock my 300 to 333, got it to 350 but it got a little unstable, I haven't tried playing with the CPU voltage but at 333 it's fine anyone else got it faster without extra cooling.

[grandslammer]

Hi!
Is your 300 "originally" a 66mhz fsb, or 100? Reason I ask is that I got one some time ago that was a 66mhz chip. The guy who I got it from said he was running it at 412mhz (5.5 x 75mhz fsb) and it did so for me for a while, but I have no idea how long he had run it at that speed. Seems like he said it was for quite some time...

Do you have a temp monitor on your board/socket? Oh yeah, you might try using a software cooler program to help with temp control. You can find them on this web site, or I would be happy to send you a copy.

Since you said you're at 333, I'm "assuming" it's a 66mhz chip, which would be 5 x 66. I'd try 5.5 x 66 = 363, or 5 x 75 = 375. Mine was a 2.2 v core. Try 2.3 v and see if that'll run stable. This might work for you. If not, then try going to 2.4 v. This should work for you. But, you might want to stay away from 5.5 x 75, as this may have been the downfall of my (his) chip.

Good luck in all, and let me know how it goes, okay?

Mike P.

[This message has been edited by grandslammer (edited 10-18-99).]

[grandslammer]

Hi again!

If your chip was of the 100mhz variety, (especially if you have 100mhz ram!), you would see better performance with the 100mhz fsb speed! Make sure if you do have 100mhz ram, to have your m'board set to run your ram at fsb speed, not agp speed...

I would seriously try 3.5 or 4 x 100. I really feel that 350mhz w/100mhz fsb would give you better performance than 375mhz w/75mhz fsb...

Try the 3.5 x 100, upping the voltage by .1v at a time. You may well be surprised to see how big a difference a .1v can make in stability sometimes!

Then if that works well, (which it should...), use that for a few days, maybe a week if your will power can hold out that long! Then try going up to the 4 x 100 speed. Or, if your m'board supports it, try 4 x 95mhz fsb speed.

I have a magazine that came out the month the k6/2's came out. It said that they were designed to run optimally at 95 or 100mhz fsb.

I mean really, 4 x 95 = 380, right? That's not a bad deal for a 300mhz chip, huh?

Anyway. I've bent your ear long enough, e-mail me if you want that cooler software, and I'll send it to you. Let me know how it goes.

Mike P.

[This message has been edited by grandslammer (edited 10-18-99).]

[This message has been edited by grandslammer (edited 10-18-99).]

[spickee]

Many thanks Mike

My FSB was at 100 originally, I have taken it down to 75 by 4.5. I will give it a go at your suggested speeds, and let you know what happens.

Spickee

[spickee]

Well managed to get it up to 350 today, so far I'm stable, 3.5 x 100mhz at 2.2V, unfortunately next step is 2.5V I tried with that but things got very unstable very quickly. (I got scared can't afford to fry the chip this far into the month) When I last tried at 350 it died on me quite quickly, this time I'm ok, but I have been running at 337 for about 4 months. Maybe I've run it in now.

I don't think I'm brave enough to try 400 yet.

Something you might be able to help me with when I do a memory benchmark in Sandra, I get about 88, which is below a 200mmx. I have got 128Mb 8ns Sdram, what am I doing wrong. cpu is about 995.

Help with the memory?

Darryl

[alpha]

I'm pretty sure that the K6-2 333 runs on a 95mhz FSB x 3.5, NOT 66 x 5, so it would be much quicker on a 95mhz FSB. You might make 350mhz @2.4v but then again it may fry your chip (that was adisclaimer by the way). The settings page of my mainboard manual quotes 95mhz anyway (Chaintech CT-5AGM2).

[grandslammer]

Yeah, you have to throw in that gratuitous (?) disclaimer, because with o/cing, you never know. But, I have talked to LOTS of people who run their amd's anywhere from the orig. 2.2v, to 2.7, although it would seem that 2.5 would be enough to carry it as far as it will go, huh?

Good Luck In All...

Mike P.

[grandslammer]

Hi again...

So, from your last entry, I'm guessing that your motherboard jumps from 2.2 to 2.5 volts without anything in - between... Is this the case? I hate when that happens...

If you think about it, 2.5v is on .3v higher thatn 2.2.... That's less than a third of a volt.

How old is your chip? That is, how long have you been running it (at 300-333?)

You might want to go ahead and try your present (350?) setting for, say a week, and then, keeping the same SPEED, bump to the next voltage setting (2.5v?) Run that for a few days, maybe a week, then bump up to 4 x 100... I really think that would work. It might work now, but what the heck, burn it in at 350 - 2.5v for a week, the jump to 400. I think this'll work for you, and you'll have a 400mhz system.

As far as the ram, check in your bios and see how it handles ram >64mb. There should be two options, os2, or non-os2. Select the non-os2 setting.

I'll see what I can come up with about the ram and get back with you. If you want to, feel free to e-mail me with the link on the border of this post.

Good luck in all,

Mike P.

[This message has been edited by grandslammer (edited 10-20-1999).]

[bigc]

i have my k6-2 333 running at 380 for months very stable @2.7volts have read of people going as high as 3.3v!!!!! 2.5 wont hurt your chip.

[BP]

I've got a 300 K6-2 on a Tri-Gem Delhi-III mobo that was set at 66mhz.I tried 100x3.5 but it was'nt very stable and liked to crash during Unreal.Since I've got PC66 ram I thought that might be the trouble,so I set the FSB to 95x4 and it's been running great ever since.
Oh yea it's voltage is still 2.2-didn't have to touch that for 380

[spickee]

I now have a small problem my mobo says it will only go up to 350Mhz, it's a pcchips m577, would a bios update take care of this problem or not.

I have got the award flash program but am a little dubious about using it, will it work or kill the computer.

Still running comfortably at 350 3.5 x 100 fsb, with pc100 sdram.

Any leads on full version of sandra.

[Ricardo]

Hi spickee!
My MoBo is an M577 too and it have the voltages between 2.1 to 3.5 volts, below you find the sets of jumpers to achieve all voltages.
Voltages of motherboard M577
2.0V All Open
.1V C O O O
.2V O C O O
.3V C C O O
.4V O O C O
.5V C O C O
.6V O C C O
.7V C C C O
.8V O O O C
.9V C O O C
3.0V O C O C
.1V C C O C
.2V O O C C
.3V C O C C
.4V O C C C
.5V All Closed
I hope that could be usefull and let me tell you that my actual processor, K6-2/400, is running at 500(5x100) and 2.4 volts with no problems. Just take care with the temperature, I´m using two fans and a big heatsink with thermal paste.
Good luck and keep us informed.

P.S.:My anterior processor, K6-2/300, was run at 400(4x100)about a year with the normal voltage 2.2 volts and never gave me any. problem.

[Peter M]

Hi!

The M577 voltage table above is correct.

That board has bus frequencies up to 100 MHz, and three-jumper multiplier settings (which gives you 2.5x to 6.0x on newer K6-2 and -III, and 2.0x to 5.5x on older ones).

The latest BIOS, released 1999/03/06, does handle all speed grades of K6-2 and K6-III.

However, for the 2.4V types with their high power consumption, PC-Chips says M577 v3.0 or earlier are not suitable. v3.1 is. However, now that AMD has reduced power consumption by a third and went back to 2.2V, the older boards are back into the MHz race :-) Noone stops you from going 5.0x100 MHz at 2.2V or from doing stuff beyond specification.

Note also that all M577 do have a 95 MHz setting as well, so that 333 can be reached at 5.0x66, 4.0x83, and 3.5x95. Same for around 380 MHz. The higher frequency and lower multiplier always is the faster setting. At 95 and 100 MHz, if your DRAM isn't up to that, you can select to run the DRAM at 63/66 MHz and still have the CPU and mainboard cache at 95/100.

Hope that shed some light - Peter


[This message has been edited by Peter Missel (edited 10-27-1999).]