View Full Version : AMD k6-2 500 overclock question
Sushiman
10-30-01, 12:45 AM
Ok here is the setup before the problem
ASUS P5A MOBO
AMD 500 with the multiplier at 5.5
FSB at 120mHz
FSBxMULT = 660mHz
Ok guys maybe you can help (please!). I cant seem to go higher than above. The highest multiplier is 5.5 on the board, the highest i can set the FSB is 120.... My temps/cooling is fine (40idle, 47full load). Is there ANYWAY to go higher? Can i jump the FSB or Multiplier higher? I couldnt find anyway to do it.... Thanks in advance for the help!
Mark
If you're serious that you've actually hit 660mhz on a 500 chip then you've done great, of course every overclocker doesn't want great results, they want the absolute limit that their system can handle and then some. If you want more then set your multiple to 2.0, the K6-2/3 translate 2.0 into 6.0 so if your chip will hold then you'll get 720mhz.
Sushiman
10-30-01, 01:34 AM
Ok, Yeah im at 660 right now, I guess i wasnt really even looking at the 2x multiplier being 6... i merely looked at the end and only saw 5.5... i guess i think in a straight line. Ive had it at 660 for 2 weeks now without any problems. I really dont care if i fry the heck out of it, I figure as long as the temp stays low, the voltage as absolutely as low as possible, I wont fry the chip.
Thanks again for the info =)
Mark
*now about that that pesky 120 FSB limit??? any help there?*
The Coolest
10-30-01, 04:17 AM
That's a great overclock for that CPU!!!
My K6-III 400 barely hit 450 with a .3 Volts increase!
What is the Vcore you are running this chip?
Too much Vcore could kill the chip very quickly...
Sushiman
10-30-01, 07:04 PM
I believe my current vcore is at 2.6, (+0.3). Im pretty sure I could actually do it at 2.5, but there was an odd error that i wasnt sure about ... But I think it was OS related and not speed.
minoukat
10-30-01, 08:13 PM
Your OC is really great ! My K6-2 needs 2.7v VCORE to do 475 MHz, and it's a 450 !
What's the stepping code on this "super chip"?
SickBoy
10-30-01, 09:37 PM
Originally posted by eobard
What's the stepping code on this "super chip"?
No doubt.... I'm thoroughly impressed, 660 out of a K6-2 is amazing.
The FSB thing - the Asus is an ALi board, and I don't know about ALi S7 chipsets but the Via doesn't do much more than 105-110 MHz reliably. I don't think there's a /4 PCI divisor on them, so 133 and lowered multiplier is probably not an option.
Hope this helps, I imagine you're pretty happy about finding out about the multiplier trick.
SickBoy
Originally posted by SickBoy
No doubt.... I'm thoroughly impressed, 660 out of a K6-2 is amazing.
My question wasn't rhetorical, it was sincere. I'd like to know the stepping code for that chip. Mine's CTX and I get 600mhz (from 450 base) only at 2.8v+ and even then it isn't 100% stable.
Sushiman
10-31-01, 03:29 PM
Is there a way to check the stepping code without taking the fan off the processor and then removing all of the artic silver (which i so carefully put on to ensure maximum transfer). I'd be happy to tell you then.
Use this program, it'll say the stepping code on the first page.
Sushiman
11-01-01, 01:15 PM
Ok, I ran that program, It says
Stepping: C
Core Stepping: CXT
I hope this is what you were looking for, I'd post a pic of that program, but how do i add a photo to this text?
Mark
Originally posted by Sushiman
Ok, I ran that program, It says
Stepping: C
Core Stepping: CXT
I hope this is what you were looking for
That's it alright. I'm amazed. Same stepping as mine, one of the better ones but still, 660mhz! Is that a K6-2 or a K6-2+? There is a difference. What's your voltage and have you tried the 2.0 multiple yet?
Sushiman
11-01-01, 02:43 PM
Well I fried the chip trying to go for the 6.0x multiplier... Oh well, I'll go pick up another chip and try again, maybe i can actually start with a 550 this time.
The old settings:
Stock 500 K62@660
Vcore - 2.8
Oftest - On (raises VIO 10%)
Default VIO - 3.3 (3.63)
Multiplier - 5.5
FSB - 120mHz
To blow up the chip and make the room smell like burnt dust:
Vcore - 3.0
Oftest - On
Default VIO - 3.8 (4.1) - Is that burnt AMD i smell?!
Multiplier 6.0
FSB - 120mHz
Originally posted by Sushiman
Well I fried the chip trying to go for the 6.0x multiplier... Oh well, I'll go pick up another chip and try again, maybe i can actually start with a 550 this time.
The old settings:
Stock 500 K62@660
Vcore - 2.8
Oftest - On (raises VIO 10%)
Default VIO - 3.3
Multiplier - 5.5
FSB - 120mHz
To blow up the chip and make the room smell like burnt dust:
Vcore - 3.0
Oftest - On
Default VIO - 3.8
Multiplier 6.0
FSB - 120mHz
Ahh crap! That's not good, sorry on that one. :( With a VIO of 3.8 I'm not surprised though. I don't think it was the core 3.0v. Mine's been at 3.1 for brief periods and 2.9 for half a week once, mind you I've got ultra-air cooling going on. (The fans are mounted outside the case due to lack of room, much air flow!) I suggest try the same chip underclocked. Some people have cracked their socket A's cores and found that the chips still work fine but only at lower speeds. Obviously this isn't the same situation but I'd at least check it out before buying a new chip. As for replacements I suggest you get a K6-2+ if you can. Their newer design had several advantages BUT they have a lower voltage base so you can't go up to 3.0v!!! Of course a low end Duron costs almost the same price and it's soooooo much better but then you'd need a new board & heat sink.
Sushiman
11-01-01, 03:40 PM
What's bizarre ... even when i was at 660... If i went above the vcore to 2.9, 3.0, 3.1.... It wouldnt boot, no matter if i had the oftest on or off.... only at 2.8 ... And i have some crazy cooling going in that case also. 2x105mm fans, (intake and exhaust) Completely pressurized (no air leakage). Although the temp's sometimes did get a little crazy 50C. It was unfortunate that the chip blew out, Im not sure if i want to buy another mobo and chip at the moment. Of course online i get the k62 for like 40 bucks... but at duron and mobo will be a lot more than that ... Do you know where i can get a k62+, do you think it will overclock to 660 also if i get a 550 chip?
Originally posted by Sushiman
What's bizarre ... even when i was at 660... If i went above the vcore to 2.9, 3.0, 3.1.... It wouldnt boot, no matter if i had the oftest on or off.... only at 2.8 ... And i have some crazy cooling going in that case also. 2x105mm fans, (intake and exhaust) Completely pressurized (no air leakage). Although the temp's sometimes did get a little crazy 50C. It was unfortunate that the chip blew out, Im not sure if i want to buy another mobo and chip at the moment. Of course online i get the k62 for like 40 bucks... but at duron and mobo will be a lot more than that ... Do you know where i can get a k62+, do you think it will overclock to 660 also if i get a 550 chip?
I'm not even sure where to get a K6-2 regular anymore, they're that rare. If you do want to get a + chip you'll need to check if your board can run a + chip, many can't. Mine will but only if I upgrade the bios to an "unofficial upgrade". You can check here (http://bbs.pcstats.com/amdzone/) for more info, they've got a section just for K6 chips with lots of people to bounce ideas and questions off.
Sushiman
11-01-01, 07:38 PM
Well it seems to be that even if i get a plus chip... i wouldnt really be able to overclock all that great. I didnt see anybody who said they did better than 575 really. Now... here is the thing... will the on chip 128k (500mhz) with the k62+ chip be better than a overclocked regular k62 (500->650)? Or instead of spending 33 bucks on a new k6-2.... should i just get a duron and mobo for 40 bucks more?
Originally posted by Sushiman
Well it seems to be that even if i get a plus chip... i wouldnt really be able to overclock all that great. I didnt see anybody who said they did better than 575 really. Now... here is the thing... will the on chip 128k (500mhz) with the k62+ chip be better than a overclocked regular k62 (500->650)? Or instead of spending 33 bucks on a new k6-2.... should i just get a duron and mobo for 40 bucks more?
My choice in that situation would be to get a Duron, they overclock very well, and fix the K6 system. That's what I'd do (that's what I have, check my sig) but everyone has to make their own choice. It's your money (or in the very least not mine). I would have both because Duron's are sooooo cheap now (but you'd need enough guts for a whole machine) and K6-2's are close enough to modern to still be productive machines in the general scope.
As for limits to overclocking a K6-2+ you've got to realize that that limitation applies to all K6-2's and 3's, I still have no idea how the h311 you managed to get yours up to 660mhz! You'll probably have lowered limits regardless of wether you get a plus chip or the non-plus one, even from a base of 550mhz.
Sushiman
11-02-01, 12:42 AM
I tell you, honestly, it took a very very long time sitting in front of my computer working up to 660, I sat down one saturday a few weeks ago after i learned you could change the FSB.... (for some reason I did that on my Intel machines, but wasnt thinking i could do it on the AMD, heh) So i had the multiplier up at 5.5 already. But it took me about 6 1/2 + hours straight to figure it out. Pulling jumpers over and over and over... switching voltages... switching FSB and multipliers .... i was shooting for 660 since i knew that was the highest i could get (or so i thought until the 6.0x multiplier). I didnt want to stop short of the top, but I had a list of probably 50 combinations of voltages, multipliers, and FSB settings that worked and didnt worked. I finally reached the 660 mark though ... which i said earlier that it was strange because it would run on a lower voltage than some of the other settings... But it worked! So i guess that is the key to it here.... lots and lots of stinkin time. But i'm sure most of you know that out there... Anyway, I think i'll go with that 1000mhz duron, now i wonder if that will smoke my 866mHz@1.18gHz Pentium?? :)
If you are going for a Duron 1G, then why not spent $10 more and get a Tbird? I know what its like you think, well only this much to get this, then only a few more $ to get a little better, then pretty soon all the few more $ add up, but the Tbird will be faster, more cache, and will OC higher. My 1G Tbird is currently at 1245 and I know I can go higher sence my load temps are are 41*C, but this is just a suggestion, its your money.
Sushiman
11-02-01, 01:10 AM
Will this still work with the k7s5a motherboard? Or should i spend another 10 bucks more for that also =P .... But seriously though. I have some extremely aggessive cooling in one case ... and i'm sure i can keep whatever it is down cool, And if you read above, I dont stop overclocking until absolutely possible! Whoops forgot to add.... can this mobo support both ddr and sdram at the same time? Or is that a stupid thing to do and really i shouldnt even be saying it blah blah blah ... speed differances? yes/no?
Ya the k7s5a will support the Tbird, but you can only run eather DDR or SDRAM, not both at once. That seems pretty cool to me because you can use the ram you already have and then later if you want to upgrade to DDR you can. Wow, I was just looking at the CPU database and there are no entries for the Duron 1G, but the Tbird has gotten up to 1700!! The best I saw with just air cooling was 1600. I guess I need to start playing with my processor again.
vBulletin® v3.8.7, Copyright ©2000-2012, vBulletin Solutions, Inc.