AMD K6 II 500 clocking????

[blubomber]

I had a K6-2 450, 2.2v version, that i got up to 500. I only had to raise the voltage up to 2.3 and it was rock stable. But, when i tried to get up to 550, it would post but then crash in windows. I even had my voltage up to 2.8 i think with no luck. So, you will probably have to get your voltage up to 2.3 or 2.4 to get it to run at 550 stable. Does your mobo support higher than 100FSB? If it does, try increasing that to get that extra megahertz or so.
As for why you BIOS does not recognize your CPU correctly, i dont know. What mobo and BIOS version are you using?

[JCB]

Those things will overclock 50-100 mhz's, but begrudgingly. With proper cooling you can raise the core voltage, but 2.7V is what we call, "The DANGERZONE."

You have a nice little workhorse there. Don't fry it by looking for too much out of it.

[samwichse]

If you can get it to run stable at 550 and increased voltage, if you set the multiplier to 2X, your AMD chip will automatically read that as 6X, so you can potentially overclock to 600mhz if you can get it out of your chip.

[Dr..Andreas]

So guys with my multiplier at 5.5x and the voltage at 2.3-2.4v it should work... even with normal fan and heatsink???

What about leaving the voltage where it is 2.2v and just raise the multiplier wouldn't that do???

And finally does voltage increase = increase in temperature???

Please all help welcome... Thanks VVVMuch

ps. my mobo is a PCchips M577... anything good or bad about it???

[Ricardo]

Well Dr, my old system was a K6-2/500 running at 600 in one M577 PCCHIPS MoBo. It was stable and runs ok for more than a year. The voltage applied was 2.5 Volts but with a bigger heatsink(lapped)and many coolers inside the case to keep the temperature lower as possible. I just changed this system by my actual(PIII600E running at 900Mhz in an Asus MoBo)because I´m addicted to combat flight simulators games, and as you well know they suck every Mhz of speed from your cpu. Due to the poor math processor in the K6´s series my path to achieve higher frame rates was to change for a more powerful processor(PIII)and overclock it to a it´s maximum.
Keep in mind that you can squeeze more power from your K6 but you must keep this processor as cool as possible, don´t be affraid to use a big heatsink and many coolers as you can put inside your case. Finally, beware with high voltages, operate K6 higher than 2.6 volts without extreme cooling is shorten its life fastly.
About the MoBo M577, no bad words about, I was very happy with it but forget the in board audio, get an SB Live or something, was my case!

Good luck http://www.sysopt.com/forum/wink.gif

[Dr..Andreas]

Anyone... I upgraded my old Cyrix with the AMD K6 II 500... even though I flashed my BIOS I still cannot get it to show 500 on boot (400 instead). Anyway SisSandra, HotCPU and other testers show that it runs at 500 so no harm done.

But the question is can I get it up to 550, as my mobo supports max of 5.5x multiplier and it is already at 100FSB... voltage should it stay at 2.2 or get to 2.3 where normally the 550 runs...

other secrets welcome!!!!!

Note that at x5.5 mutliplier at 2.2v (tried once) the motherboard read 522MHz but the system was not stable enough showing after 30mins user.exe error...

Any safer!! solution or trick welcome

Thanks in advance!

[This message has been edited by Dr..Andreas (edited 06-11-2001).]

[Dr..Andreas]

So guys for the final confirmation...

Multiplier to 5.5x @100FBS and voltage up to 2.3-2.4V right!!! is extra cooling required for themoment???(brands for heatsink+fan that I should go for???)

Also what is better... x5.5 @95FBS=522Mhz at 2.2V or x5.5 @100FBS=550Mhz at 2.3-2.4V???

Just give me an answer to that and I promise to stop bothering you anymore...

I really appreciated your ideas and advice...

Thanks for your time everyone...

[blubomber]

Try using the 100fsb and 5.5x setting to get 550MHz. Try the 2.3v setting first to see if it will run stable, if not increse in .1v intervals but do not go over 2.5v. I had my K6-2 450@500 with out a new heatsink and fan. My temps did not go up that much running at 2.3v compared to 2.2v.

If you want to overclock by increasing the fsb or the multiplyer settings, you will have to also increase the voltage to the cpu to get it to run stable at the higher speeds. With the higher voltage you get higher temps. Just something you cant get around so just make sure you have good case cooling. Leave your case open if you have to so that you dont burn up the CPU. Have fun and good luck.

[kanchu_deep]

Hi,
Unfortunately Dr..Andreas, from my experience the K6-2 does not overclock so well. I have the same one, but it never went for anything more than 525(5x105), even at upto 2.7V and soon it stopped working at that too! I believe that AMD had already pushed them on the edge to get the maximum performance. Anyway, BOL
Kanchu

[Ballastboss]

The 0.25-micron K6-2 didn't have much headroom left to oc,if any.The 0.18-micron K6-2 that I seen or read about all do 100mhz or more.Thats not great but not all that bad either.

[big_block_buick]

my old k6-2 500 wouldnt hold stable at 550, even with 2.4v..it locked up loading games. finally after getting a bad sector on my brand new hard drive, i gave up and stuck with stability...till i got my k62+475, and just my bad luck i cant even keep it at 550 with max volts applied...so i'll wait and try again in about 6 months..

[shadow]

Hey BBB, sorry to hear it wouldnt run at 550 stable, I figured all the 2+'s would do it easily.

As for the k6-2's, I couldnt get stability anywhere beyond 500 on my K6-2/500.
My K6-3+/450 is another story...loves to run cool & stable at 600/2.1v (33% over) and thats not at all uncommon for these SS7 high performers, they leave the old K6-2's in the dust real fast. Too bad they're so scarce and expensive.

I'm starting to think that the 450 - 500 - 550 in the 3+ line may be all the same. Just judging from that magical 600 number achieved by so many with normal cooling on any of those speeds of cpu's.

[This message has been edited by shadow (edited 06-12-2001).]

[Ballastboss]

BBB(455?)
Sound like you may have a heat issuse going on there.
What are you using for a HSF?? Did you use a thermal compound?? I would think your k62+475 would have no issues @570mhz [6X95mhz]. AMD is not very receptive to oc'ng the FSB. Does it post @600mhz?

[This message has been edited by Ballastboss (edited 06-13-2001).]

[SilverSurpher]

I have a K6-2 500 rocksolid @fsb105MHz (525MHz) with standard cooling.
I hadn't any luck beyond 525, so keep 525 and be satisfied...
if you want more buy an thunderbird.

Cu Silver

[LemonHead]

wlel i have a K6-2 500 CXT and it runs fine @550, 2.4v

I will try for 600 after i complete black and white, or back-up my titan, as the last time i tried 600 windows didn't load and the next time i loaded up (at 550) windows kindly loaded and earlier version of the registry meaning i lost my titan. Ah well, my current one: Smegger is great so i reeeeeeeeeally don't wanna lost 'im OH HE SO CUUUTE!!!

[Dr..Andreas]

Guys I tried it with the case off and for over 2hours I was running stably at 550 using 2.3v.
Now I am thinking to add a front side fan to keep the case cool(just under the floppty and the HDD)...

but the question is???

Blow In or blow Out???

Actually I ll' try both but can anyone suggest one way or the other and why???

Everybody Thanks VVV.much. You have benn of great help aready.

[big_block_buick]

hey Shadow, yeah i get errors and lockups starting games, or shortly after gameplay starts @ 550mhz..so it's at 500..

Ballastboss, monitor wont even turn on at 600, and general protection errors at 570.heat doesnt seem to be the culprit..i have a big generic hs&f, with silver applied.

i've recently upgraded to win2k and it's been about a month since i tried last..maybe we'll see if it will go this weekend.. http://www.sysopt.com/forum/smile.gif

[Ricardo]

Hey Dr. Andreas, put this fan to suck fresh air into the case, this is because the fan at the power supply blow hot air out of the case. In this way you will get a fresh air circulation inside the case helping to keep the temperature inside more comfortable to the cpu and peripherals.

Good Luck http://www.sysopt.com/forum/wink.gif

[Dr..Andreas]

News for my AMD K6 II now @ 550!

Guys thanks a lot for your help... I needed the most.

So in detail: I run my AMD at 550MHz but with some small arrangements. An 80mm CoolerMaster fan has been added at the front of the case and my standard CPU cooler and heatsink has been upgraded to a socket A/socket 370 (and socket 7 as well!!! it fits trust me)Evercool one. Note that thermal paste is more or less vital. Voltage applied to the CPU=2.3v and runs smoothly true! Also to finish this article my processor's temperature is kept funny enough at 37 degrees centigrade and my case temp. steadily at 31.7 degrees. What's the most I can ask from it than that.

I am happy enough with my system's performance and maybe (MAYBE!!!) I 'll experiment later on with getting it up to 600!

That's an AMD K6 II at 500 CPU not (+) or anything else. People with K6 II+ my find it easier to overclock theirs but even the old! one will do the job a little bit more carefully.

Potential AMD K6's overclockers feel free to E-mail me or reply to this string.

To all of you at the other end of this line thanks again for your advices.

Take care...

[JCB]

That's a good clock at 2.3v. and running cool. The next step is in setting the multiplier to 2x. 2x=6x to a K6. Just watch the temps as you raise the core voltage. Mine ran at 2.7v stable and cool in the winter. But, summer heat and humidity kicked me back to 550 every year. It depends on ambient temps also.

Keep it cool,

[RobUK]

I think the K6/2's are very good o/c's. My 450 CXT (2.2v version) will do 550 @ 2.3v (100 x 5.5) and it is completely stable.
This is also with a standard H/f combo. Maybee its one of those miss labled cpu's i dunno but it works very well.

RobUK