My K3 400 at 450 is now running at 2.6 volt's!

[sunofwolf]

Okay just look at AMD spec on k3400 . Volt max is 2.6 absolute , any higher long term and damage will occur, from amd cd . Case temp Max is 65C! I am within limit's , overclock is successful , so there!LOL! The wolf has spokened! wintune.com has my posted specs under sun of wolf , This is not easy to do , at first it wouldn't go to 450 till i hit 2.7! Now backed down safely, chip should run prefectly. The chip spec actually look better at 2.6 then 2.7! Did go to windows at 2.5 but didn't run right! So I am leaving chip at the highest AMD setting that the chip was made to run at 2.6!

[TidalWave]

Yeah, I have a K6-3 400 too. It runs at 5.5 X 83 =458 MHz with 2.6 volts. "rock solid" Temp = 39C, try to get is to 500 as soon I have my Peltier.


Mike.

[TidalWave]

Oh, forgot to mention:

I ran my K6 III 400 (2,4v core) for 24h @ 2,9 volt at default speed (400 MHz) to burn it in. I didn't notice any difference in overclockability afterwards, though.

But it survived my stupid torture! hehehe

Mike.

[Dputiger]

After you run that chip at 2.6 for a while, try dropping to 2.5 again. Basically, you're burning in the chip. You're goal should be to lower the voltage as much as possible while keeping the machine stable.

Every point lower that you can stabilize it is a point closer to the rated speed--which means better for the chip. In theory, you might even get it back down to 2.4, though I doubt it. 2.5 is a good goal though.

[sunofwolf]

The chip is playing tricks on me. The 2.6 produced some windows problems. It took 2.7 volt's to make 450 work and stable. I am chicken out put it back at 400 and 2.4 volts. worried that it may blow , i need my computer to much and like this chip so back it goes for a while! Going to see if my promise card works, so its better at stock right now. My try 428 because it will be a safe speed! Oh well for now , I have to think about what to do! dont forget some one just cooked their chip ,!

[Win_98]

sunofwold take off the cover and feel how hot your heatsink is, usually extreme heat mean that you have overclock it too much more then it can take. it a wise thing to do and ya save yourself from burned cpu. http://sysopt.earthweb.com/forum/smile.gif a 50 mhz overclocking is usually much hotter then a 23-33mhz overclocking so know ya limit. especially in the summer overclocking can be a problem.

[sunofwolf]

Running at 428 and 2.5 volt's. within amd safety limits for this chip; even though a weak overclock it seems to run good, i think i got bugs out, chip never ran over 46case C. It is rated at 65C , so i have no reason to worry, getting HP cd burner and printer soon, the thing i dont like is a win protection wiping out my temp memory if i have a lot of work on computer i could lose the info cd burner will be used to back up everthing from now on ,i really need it.

[cpucook]

sunofwolf,

The K6-3 chips are FAR better than the K6-2. I would not want to burn that k6-3, since it is a great chip. My friend has a k6-3 400, and it has lower benchmarks than my 550 did, but for running intense 3-D games, the k6-3 400 easily does what my k6-2 550 did.

If you want your cpu to last for years, keep it under 2.5v. The L2 cache on your cpu is 400Mhz, and it will burn the L2 cache if you push it much over that.

P.S. notice how I talk about my k6-2 550 in past-tense? Thats because it died at 2.5v :-)

cpucook

[Win_98]

i think it had more to do with that extra 50mhz or that the 550 is very hot at 600mhz well maybe both but it not the voltage alone. http://sysopt.earthweb.com/forum/smile.gif you are somewhat right as it will run more stable with just enought voltage for the amount of overclocking you are doing. hey sonofwolf your default voltage is 2.2 right? try 2.4 and it should be enought to keep it stable...
i had mine set at that when doing an extra 33mhz so give it a try. the lower voltage is a better for your cpu. cpucook I couldnt get my 550 to run at 600 without going higher then 2.5v hmm even tried 2.8 voltage and wasn't stable I got bold and hit it with 3.0 the thing just crashes oh boy it was only a few more sec before this thing was toasted http://sysopt.earthweb.com/forum/frown.gif I pulled the plug guess Im just lucky huh?
you not going to believe this but the k6-2 550 is only a 582mhz core at 2.4V. 2.3v is just enought for 570mhz.

[sunofwolf]

the k3400 runs between 2.3 and 2.5 , this is factory setting limits, so its very diferent then a k2 . Also it has two times the transistors, ! I think they stopped production because amd wanted to get more money out of you. why no k3550? my guess its only a little slower then the althon 550.

[Dputiger]

Actually, the K6-3 was very hard to make. When these chips were shipping (about two years ago) their on-die cache ran at full speed. Problem was, it was very difficult to get adequate RAM yields at that speed.

And no, not even the K6-3 500 performs as well as the Athlon 500. The Athlon had a superior FPU, more cache, and I believe a greater associativity as well.

[Win_98]

k6-2+ with 128 level 2 cache is just as good as a celeron if not better with onboard cache... unfortunately for us who no longer need it what am I to do with my k6-2 550? throw it in the trashcan if I am to buy a another k6-2+ with little performance differences.

[sunofwolf]

Use your old computer for a back up; these trouble boxs always break down! I here the new chips are very easly broken, more sp , also can mean , more things that can go wrong, thats why i am in no rush to get a new computer, let other people fix the bugs, then i will maybe switch/ I am interested in a k3+500, but only if it works with just putting in that 7 spot. otherwise i will just get the next big chip.

[Navin]

sunofwolf,
I had my K6-3 400 up to 450mhz running on 2.6 volts, and it ran completely stable in all apps and games.

I backed it down after I read that 2.6 was max voltage for the chip. I then ran it at 2.5 volts, 95/428. This ran stable for me as well. I finally said heck with it, and went back down to stock 2.4 and 100/400. I agree with Dputiger - try to keep the voltage below 2.6 - otherwise you'll burn your nice, rare K6-3 400 up sooner than you want too. http://sysopt.earthweb.com/forum/smile.gif

[sunofwolf]

I am going back to 400 and 2.4 volts , just got a new HP printer and HP cd burner, this is the most stuff ,i have bought from any one, they are top rated products , i have to go printing now lol. i dont want computer problems they will cost me dough. the computer is now at 2.5 volts and 428 but a problem in win pops up once in a while, dont know where it comes from but could be due to the chip sp at 428!

[thai]

i have a k6-3 400@500(5x100) stable at 2.3v.

i tried running the chip at this spec w/ a heatsink but "w/o" a fan. Prime95 would stop running when temperature indicated by my motherboard monitor reach 46c.

when set at the same speed but voltage set up to 2.4, prime95 runs successfully above 53C before i stop letting the temp get any higher.

i leave it at 2.3 because my cpu temp only reach 42c max. this is in a hot cali summer days with prime 95 running for 2 days straight -- w/o stopping or crashing.

my case temp sometime does reach 46c though, but my cpu temp is always 4-5c cooler than case temp because i have a venting system that has the outside air/room air blowing straight into the cpu heat sink. you guys should try this method. you dont have to use as many fans and everything is just so much quieter.

thai

[lowcpuuser]

K3-400 rare...glad that is the one I chose when I built my new computer.


btw...running at specs and has never given me any problems, which is the way I like it.

[etsd311]

i'm one of the few lucky peeps that got a K6-3 400(2.4v).
i'm running it at 450(2.5v) right now.
stable as hell. no problems what-so-ever.

i'll be getting myself a Duron in the near future. =]

[werd]

hum. . yall aint doing something right. . .got my K6-III 450(AHX 2.4v) to 523 95x5.5 2.8v. backed it down to 504 112x4.5 2.6-2.7v, I like the 112mhz FSB better. besides got a FOP-32++ on this thing to keep it cool. . .that AAVID POS could bairly handle 475.

besides I still do performance burn-ins at 83x2.5 and 2.8v and I can still cook a PIII500 http://sysopt.earthweb.com/forum/smile.gif I have a proggy that I run that is by far the most processor intensive I have seen. . .even beats out looping Q3 or UT. and it is even coded for the K6 CTX core and can also hit the mmx extensions and also the on-die L2, if anyone wants it e-mail me, will share.

I normaly run it at 2.6v at 504. I even run it at 2.7v sometimes, but my instability is from the chipset overheating.

[sunofwolf]

It's really the motherboard that will let you overclock the k3 400, I am sure any k3 400 can do 450 for a long time, the safe limit on this chip is 2.6 volts. I am running the k3 400 at 428 or is it 429? At 2.5 volt's, No problems at this sp on a late model DFI with 66controler's. I dont think its worth the risk , for any more speed. I am going the run the hell out of this chip now. To me , if the computer is unstable the sp isn't worth it, how can you really use it ? If the computer keeps bugging you?