Is it me? (503+)

[flash4master]

i have a fic 503+ with a k6-2 300 and 128mb pc100 ram. my problem is that using the manual or online jumper settings i cannot o/c it. the only time it will even post is if it is at stock speed (4.5*66), it wont even post at 3*100. whats up with that?
*edit*-wrong mult.

[This message has been edited by flash4master (edited 12-02-2000).]

[wildbuffalo]

Did you bump up the voltage? Also try first with 75 fsb (4x75) Another quick question, is this cpu for 66 or 100 fsb? cause' with 4x66 it will boot as 264 and not 300. It will need 4.5x66 to boot as 300.

wild

[flash4master]

it is a 66fsb chip, i just got the mult. wrong. i have seen other cpu's of the same type running at stock voltage at small o/c's. even if it were a voltage issue, it would still at least post.
Fic 503+ (pcb 1.1a)
amd k6-2 300
2 64mb PC100
Riva 128 4meg AGP

[wildbuffalo]

You are right that some CPUs would oc some what at even the stock volts, but K6-2 are really bad chips and do not oc very well, infact some won't even post for a small increase cause' they are already running at their limit as it is at the stock speed. Try oncreasing the voltageby 0.1-0.2 volts from the stock along with 3x100 setting. If it still won't post or run stable then you are stuck with a chip which is already at its limit. GOOD LUCK

Wild

[RobRich]

K6-2 are really bad chips and do not oc very well

Kind of a broad generalization there, isn't it? I've o/c'd many K6-2 chips to 100+ MHz past their factory specs. The latest K6-2+ 450's are commonly reaching 600+ with just good cooling.

Flash4master, I hate to say it, but most of the original 300's do not o/c very well. The best I was ever able to get most 300's was 333 MHz. Since you have a 66 MHz part, you may have even more trouble.

Since you have a good Socket7 moatherboard, have you thought about a potential processor upgrade? The latest K6-2+ 450's are becoming quite price competitive, and are excellent chips for moderate overclocking.

Good Luck,
Robert Richmond

[This message has been edited by RobRich (edited 12-02-2000).]

[flash4master]

ok, at first i thought it was a 66fsb chip... now im not so sure what it is. the markings on the cap are as follows:

AMD-K6(tm)-2
AMD-K6-2/300AFR
2.2V CORE/3.3 I/O
A 9828GPDW

and the chip is from Malay.

*edit*- yes i have considered upgrading the processor. i was going to consider getting a newer one for it as a gift for Christmas

[This message has been edited by flash4master (edited 12-02-2000).]

[wildbuffalo]

I never said anything about "K6-2+" or "K6-3+", but the "K6-2". I am myself using K6-3+ 450 oced to 616 (5.5x112). But I also have K6-3 (non +) 350 which I could push to only 400 at the limit of its voltage range, and used to have K6-2 300 (100 fsb) which would only go upto 333 (5x66) (which infact was worse performing due to reduced fsb).

wild

[BFlurie]

Flash4, do you have Sandra, or some other good CPU identifier? Yours may be like mine -- a later "CXT" version of the K6-2 -- employing some of the K6-3 stuff (but not the on-chip L2 cache). The site: http://www.lostcircuits.com/cpu/amd380/

has some good info. And yes, the 300 can indeed be a newer, CXT version. I run it at 366, and had it up to at least 413, but some software wouldn't work well.


[This message has been edited by BFlurie (edited 12-02-2000).]

[flash4master]

Im in the process of reinstalling everything (i managed to corrupt the hdd), so i will put on sandra tomarrow. im going to reinstall everything with it set to 112*3 and see how it works out. if indeed it works and it was a 66MHz chip, there should be noticible speed gains, right?

[BFlurie]

Found these two excerpts:

According to whether a given chip runs stable at the clockspeed specified (+ca. 10%) it will be labeled as 400, 380 or 366 MHz at which point there will be further tests to determine the bus threshold of the core. If the signal is not clean at 100 MHz, the core will be labeled as AFR/66, meaning that this CPU will be sold as a 66 MHz bus speed version only.

********************************************
The mechanisms are available starting with newer K6-2 CPUs of frequencies 300 MHz and above. Don't tell me that the features are K6-2 400-specific. My CPU is K6-2 300 and it is XT core. To check if CPU is a new version, look at the number printed in gold on the upper side of ceramic substrate. 26050 means old core, anything different than that (like 26351) - new core. Anyway MXK6OPT will check for CPU model before trying to optimize anything.

********************************************
You may have to up the processor voltage to get it to run o/ced. Mine runs @ 2.5V -- that's the max I would ever use. It's life is probably being shortened now, but it's cooled well.




[This message has been edited by BFlurie (edited 12-02-2000).]

[flash4master]

its the 26050 one...printed on the ceramic on the edge next to the cap

[BFlurie]

Then it's not CXT core -- but that means nothing concerning o/cing. It also seems like it's not a 66 (should run @ 100 FSB)according to the above.