HELP Urgently need stepping codes

Ottoman

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Joined

May 21, 2001

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Bahrain

• Nov 29, 2001

• #1

I may have stumbled upon a Freak of nature here....


I bought a Slot A classic athlon yesterday...

instead of have the usual stepping K7650 (my old one)

it is a AO750.... i did buy a 750, but AO?? i've only seen K7
week 33

and it has 256 kb full speed L2 cache... where as my other had 512kb half speed cache....
I thought they only came in 1/2 1/3 and 2/5

and i've gotten some insane results.. I'm talking 38% overclock using air.... and thermal paste not even ASII!!

I dunno what I got but I need help!!! I looked all over for a Classic athlon stepping code d-base or guide... got nothing

I had a huge post that went into detail, but the forum went retarded when I tried to post and I lost it... I'll tell u later

but i hit 1053 mhz!!! 9x117@ 2 volts

 

Last edited: Nov 29, 2001

flounder43

Senior Lawyer-clocker

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Sep 20, 2001

Location

Minneapolis

• Nov 29, 2001

• #2

Here are what the codes mean, for reference...

 

OP

Ottoman

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May 21, 2001

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Bahrain

• Nov 29, 2001

• Thread Starter
• #3

sorry champ..

that's for a socket A duron...

I'm talking a SLOT A 'classic' athlon..

the long ones, that look like celerons... but in a black case...
came out in 99-2000

 

Thelemac

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Mar 15, 2001

• Nov 29, 2001

• #4

It may be a slot A, but it's not a classic. That's a Thunderbird (you can tell by the cache).

 

OP

Ottoman

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May 21, 2001

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Bahrain

• Nov 29, 2001

• Thread Starter
• #5

well that's some good news...

is that what AO means?

cuz the stepping has changed from Slot to Socket..

I can't decipher most the code... I had once found a page on it, but no longer

wonder why they halfed the cache size?

 

]-[itman

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Sep 24, 2001

Location

Arizona

• Nov 29, 2001

• #6

the AO750 means you have an Athlon(A) 750mhz processer(0750) the 0 goes with the 750 as a placeholder for the higher chips that reach a ghz. The way you tell a classic Athlon from the newer Thunderbirds is the cache size.

 

flounder43

Senior Lawyer-clocker

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Sep 20, 2001

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Minneapolis

• Nov 29, 2001

• #7

Ottoman said:

sorry champ..

that's for a socket A duron...

I'm talking a SLOT A 'classic' athlon..

the long ones, that look like celerons... but in a black case...
came out in 99-2000

Click to expand...

Although the pic is of a socket A, I think the codes work for the slot kind as well...

 

Über~PhLuBB

Jedi Knight Senior

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May 9, 2001

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Portland, OR

• Nov 29, 2001

• #8

Thelemac said:

It may be a slot A, but it's not a classic. That's a Thunderbird (you can tell by the cache).

Click to expand...

How much cache do classics have vs TBirds? I'd like to find out what mine is too, I removed the case for a GFD that I never bought, so cache is the only way I can tell.

 

OP

Ottoman

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May 21, 2001

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Bahrain

• Nov 29, 2001

• Thread Starter
• #9

the classics have 512kb @ 1/2 , 2/5, 1/3 speed,

I had a 650 w/ 512kb @1/2...

now I got a tbird w/256kb @ full...


wonder if the only difference between the socket A tbird and Slot A tbird is the On-die cache...

 

OP

Ottoman

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Bahrain

• Nov 29, 2001

• Thread Starter
• #10

flounder43 said:

Although the pic is of a socket A, I think the codes work for the slot kind as well...

Click to expand...

well then help me decipher

old:
AMD-K7650MTR51B A
21000150024

new:
AMD-A0750MPR24B A
210033528921


I think the old one is 2000 week 01 (0001)
and new is 2000 week 33 (0033)

 

flounder43

Senior Lawyer-clocker

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Minneapolis

• Nov 29, 2001

• #11

Ottoman said:

well then help me decipher

old:
AMD-K7650MTR51B A
21000150024

new:
AMD-A0750MPR24B A
210033528921


I think the old one is 2000 week 01 (0001)
and new is 2000 week 33 (0033)

Click to expand...

Here, I think I can help with the new one:

A0750[speed 750MHz]M[Card Module]P[Vcore 1.7V]R[Case Temp 70C]2[cache128]4[?]B[200 MHz System Bus]A[?]

and so on, it is a little diff, but the codes seem to make sense.

 

OP

Ottoman

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Bahrain

• Nov 29, 2001

• Thread Starter
• #12

hmmm...

except I have 256 kb cache..

 

flounder43

Senior Lawyer-clocker

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Minneapolis

• Nov 29, 2001

• #13

I found this on the net, codes for the classic Athlon slot a:



Other Numbers and Letters
M : slot package
T : 1.03V - 2.05V operating voltage
R : 70C max case temperature
5 : 512Kb L2 cache
2 : 2/5 L2 cache divisor
B : 200MHz FSB
A : 0.18um core

Those seem to match yours, except the cache, which runs at 1/2 on a 650, instead of 2/5.

 

Last edited: Nov 29, 2001

Thelemac

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• Nov 29, 2001

• #14

They halved the size because they moved it on die...so that they could make it faster. They wanted to keep the die size down, though. So twice the speed should work just as well at half size (by the obvious reasoning there. Might be somthing else, though)

 

OP

Ottoman

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Bahrain

• Nov 29, 2001

• Thread Starter
• #15

so you're saying my slot A tbird is the same as a socket A 750 tbird? except mine is stamped on a bigger PCB and runs cooler but it's the same chip???

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