K6-2 500 & FIC503+

[speed01]

Why can't I get my k6-2 over 500? Is there some kind of special trick to this that I'm not aware of?? I've tried upping the fsb but it won't boot, I tried increasing the clock multiplier and it won't boot. Am I missing something here?

 

[Pederv]

What revision is your 503+? The revision is in the corner by the last ISA slot. Do you have the latest bios for your board? I was able to put a K6-2-550MHz on a 503+ REV 1.1A, but the bios would only recognize it as a 533MHz, even with the latest "offical" bios from FIC.

 

[speed01]

It's a rev 1.2a with the JE439 bios. As far as I know, it's the most recent version. I figured I could get it at least to 550 (hopefully better) but no luck so far, just errors upon boot (if it makes it that far). I'm also running 256m pc133 SDRAM so I doubt it's a memory issue.

 

[speed01]

Uhhhh.......anybody??? I've tried 5x112, 5x124, 5.5x100, nothing seems to work. Could the cas2 SDRAM setting be causing this somehow?

 

[Poof]

It could be that it needs a bit more voltage to boot, if that option is available in your FIC. Also did you think about some better cooling?

For the hell of it, a little more than a year ago, I actually tried a 5.5 x 100 on my K6-2/500 (on a Compaq mobo even), and it booted just fine. Problem was that when it started running SETI, it seg faulted (the OS was Linux). I switched it back to 5 x 100 and never got chance to putz around with it. I now have 2 OC'd, home-built systems (P3 & Duron) and know alot more about OCing then I did then (eg., I know now that the retail HS/fan I have on the K6-2 doesn't have thermal grease, etc.)...

 

[speed01]

I tried bumping the voltage in .1 increments up to 2.5 but still no go. Should I go higher? How high can I go before smoking the cpu? I don't think it needs more cooling, I've got a Thermalloy socket 370 heat sink and fan on it with a second 3in case fan blowing across it and the case is open. Right now the hs is barely above room temperature. Would the fact that I'm using a PCI video card have any affect on things?

 

[cbuchach]

I am running a 503+ now with a K6-2 550 at 550 with the JE439 BIOS you mentioned. I have it set to 5.5 * 100 using pretty basic default settings. I also am using generic pc100 ram. The board is revision 1.2a and does not have the special sticker that is supposed to be required to run at 550. I do run the processor .1 volts over its rated just to add a bit of stability, and I use an alpha heatsink.

 

[tpetre4322]

on my third system, i have a soyo 5eam+ and k62500, its got a golden orb on it, itried to up it just to see what it would do,it wouldnt go 550 even with 2.6 volts, so i said screw it its my sons system, so i didnt want him yellin at me all the time, my computers messed up, so i just run it stock, i think the k62s were just getting to the top of what they can do.now my daughters computer has k63+ 450 with ga5ax, havent played with it to much, but 550 booted right up at stock vcore, and it hasnt crashed once, it has a fop32 on it, i would up fsb and try higher bus, and mhz, but she wont let me touch it, she says everytime i mess with her computer it screws up, shes probably right, those k63+ overclock really well if you can get your hands on one, and your motherboard supports it, hers just sees it as a k63, but it benches and runs real well.

 

[Dan]

speed01: At 500MHz you're already close to the upper limits of your chip anyway. If you can't get 550MHz (10*5.5) then you may be able to get 522MHz.

Assuming you used thermal compound and have a good HSF, try this:

--> set your external bus frequency to 95MHz (CLK1, down; CLK2, up; CLK3 down).

--> set your CPU to bus frequency ratio to 5.5 (FREQ1, down; FREQ2, up; FREQ3 up).

That will get you 95*5.5 = 522.3MHz.

Then you'll at least have "bragging rights." Run a few benchmarks though and you'll quickly realize that you were better off at 100*5 = 500MHz.

 

[Pederv]

Dan an tpetre4322 both have points. The regular K6-2's and K6-3's were at thier limits. I've tried to get 3 different K6-2-550MHz systems to 600MHz no luck on any of them. The K6+'s are another story, but can you find one?