AMD Stepping FAQ

[Dunadan]

Originally posted by EMU
Pop it in, and try it out... then you will know. We cannot test your CPU for you. It may be unlocked, although highly unlikely...

yes i know, but i don't have anything yet, only the cpu.

i want to be prepared when the other parts of my computer arrive.
you are saying that can be a posibility?
well, then its a matter of time, i think..
:ehhsad:

[tuffstuff]

I am thinking about upgradeing to an athlon xp 2200+

my question is if this processor is possibly locked or did AMD ever start locking this processor

[tredragon]

I have a Barton 2500+ stepping AQYFA 0345RPBW
Guess this is locked completely huh. FSB will be my only recourse I guess.

[scottws]

Originally posted by Micutzu
STEPPINGS

The Athlon XP Thoroughbred core and Barton processors have the multiplier unlocked from the factory , so any motherboard that has the option for multiplier setting cand adjust it . The processors under 2000+ have the 5X-12.5X range available , and the 2100+ and higher have the 13X-18.5X range available . The exceptions are XP2600+ / 333FSB and Barton 2500+ , wich have the 5X-12.5X range available . To toggle between ranges , you need to connect/cut the rightmost L3 bridge .

AMD started locking the multiplier on their CPUs after week 39; while some of the CPUs made during weeks 39-42 are still unlocked, all the ones from week 43 and later come multiplier locked.

I have an Athlon XP 2400+ and I can't change the multiplier. No matter what I change it to in BIOS, the system will not POST and I have to clear CMOS to get the 15x multiplier back. I must have one of those unfortunate locked ones, though I did order it from Newegg the very day it came available.

[ThatFunkyMunki]

how good would a SIXIB 1800+ be?i might buy one from wmcjhi

[switched_on]

i got an AGTIA palomino 2100, dont think its been listed yet here (at least i couldnt find it in a search heh)

[TRICKDADDY]

How do you know if you have a good stepping with alot of overclocking potential?

[tredragon]

Read. The unlocked steppings can be multiplier OC'd. The rest can only be FSB OC'd.

[TRICKDADDY]

I did read. my question was how one determines the OC headroom of a proc based on the stepping code. Just because a proc's multi is unlocked doesn't mean that a proc will oc really high.

[tredragon]

It's a process. So long as you have stability and temps are down, you push it until you find your comfort zone.

[_dangtx_]

but first burn it in at different intervals...like 1 day folding and priming at 200fsb,the second at 205 and so on :)

[pietaster]

My info on my 2600 barton


AQZFA0341UPMW

Is it locked?

[total begineer]

how much do the palominos go?
what is the most anyone could reach on air cooling and what were the temps?
what is the max FSB with 'em?

[realistix]

I have abrton 2800+ AQXEA 0318MPMW. What can you tell me about it. What is its full potential and is it unlocked from the factory. If not can it be unlocked. If so, How?
Thankyou

[_dangtx_]

week 41,lok
week 18,no lok watch ur temps with speedfan b4 o/c :)

not too familiar with pallys,was in intel hell back then :P

[Viet15philong]

Thanks for the info on the post

I have a mobile 2500+ IQXFA 0348 at 2.7ghz at 1.75v

[aubiecat]

I wish I understood all this, :<

[mistamista2000]

Was not sure if anyone had posted this CPU identifier program before. Gives you basic info. on your XP CPU when you input the steppings.

http://mp3.zonebg.com/cpu/cpu.php

[Oobi Doob]

i think i have a 2100+ ThoroughbredB and the label says the stepping is AIUHB 0250MPMW. is this cpu unlocked in anyway. i don't want to have to do the pencil trick :). i don't know what the other numbers mean.

[Skyfire]

I got my mobile 2500 from newegg today (ordered yesterday **** they are fast). Stepping is AXMH2500FQQ4C Y911445A40063 IQYHA0351MPMW.

Btw that lowyat site doesn't explain the "A4" in Y911445A40063. Anyone know what it means?

[dekleine]

Well mine: 2600+ stepping: AQZFA 0341UPMW (this one was not in your list)
Is it a locked one ?


Bye the way, the other codes on the label:
AXDA 2600DKV4D Y89 3877200499
What does this mean?

[conceptxp]

hmmm for some reason my company have these OEM xp2400 cpu in stocks

AXDA2400KV3C / AIUHB0245VPAW

is that (0245) year 2002, 45th weeks CP?U and is the CPU unlocked???
if yes should i buy 1??

[noobman]

um, models with the AQYHA are also locked i got a 3000 barton i forgot to look at the first 4 numbers on the third row which where 0351-03 2003(year made)-51 (week of production) Doh!!!!

[sdsu_ee_e36]

im just gonna ask..can some tell me about my processor

AXDA2800DKV4D..is it locked?

AQXEA0320UPAW or could be AQEA0320UDAW..hha cant tell from my writing

[mobius_13]

AMD 2400+ mobile IQYHA 0402MPM :D

[will_raymo2000]

My mates CPU is AXDA2400DKV3C 9797203929101 JIUHB 0341MPM is this unlocked?

thanks

[Tappits]

so what will/can i get out of my 2400+ AQXEA 0339 VPMW
and is it lockt as its not in the list
the date on the chip says 1999

[Axxe]

im just gonna ask..can some tell me about my processor

AXDA2800DKV4D..is it locked?

AQXEA0320UPAW or could be AQEA0320UDAW..hha cant tell from my writing

Unlocked, only week 20.

[Axxe]

My mates CPU is AXDA2400DKV3C 9797203929101 JIUHB 0341MPM is this unlocked?

thanks

Locked, week 41.

[Axxe]

so what will/can i get out of my 2400+ AQXEA 0339 VPMW
and is it lockt as its not in the list
the date on the chip says 1999

1999 = copyright date

The only way to find out whether or not your CPU is unlocked is to test it. Just because it's not on list doesn't make it automatically locked. Remember that the list isn't comprehensive, and is based on information given by forum members.

[Tappits]

Xp 2400, AXDC2400DKV3C - AQXEA 0339VPMW
Is un locket but I have broke it and cannot change the fsb :( :FAH:

[TDOGZZ]

i thought i read+wrote down the wrong stepping for my 0349 locked 2500 barton,then i noticed some mobiles have the IQYHA STEP i was gonna post in amd thread but figured here would be better.then i read 10 posts up^ Framalajord has the same step .rig in sig,ram is limiting me. it went(227*11)just under 2v ram divider6/5 ,forget the temps.never pushed anymore.

[OC_h3P]

Hi, I'm a newbie here. :)
I need to know about my "PQZFA 0349 MPMW"
I can't it find in everywhere. Is it a fake proccessor? (I dont think so, It's a box one). But its overclockability is so bad. Plz help me


I also have plan to buy a duron applebred proc.
What stepping is good and what stepping I shouldn't take. I really need this info, dont want to do mistake for the 2nd time. Plz help me choosing the applebred.

Sorry for my bad english

[4-n-zics]

Hi, I'm a newbie here. :)
I need to know about my "PQZFA 0349 MPMW"
I can't it find in everywhere. Is it a fake proccessor? (I dont think so, It's a box one). But its overclockability is so bad. Plz help me


I also have plan to buy a duron applebred proc.
What stepping is good and what stepping I shouldn't take. I really need this info, dont want to do mistake for the 2nd time. Plz help me choosing the applebred.

Sorry for my bad english
the PQZFA is a newer stepping, but yours is a week 49 and is locked..

[A-M-D]

i dont have a clue what my steppings are i have an AMD Athlon 2000+ XP with 128k L1 Cache and 512K L2 Cache its a Thorton chipset running @ 1667 somehow my thermal paste unlocked the L2 cache i am loathe to take the thermal paste off in case it re-******s my L2 Cache a program downloaded from AMD's site CPUINFO.exe shows a Family.Model.Step of 6.10.0

[chubster70]

just got an xp2500 barton. stepping code AQYHA 0414VPMW .

Can anyone tell me what these are like to overclock.... newbie here , so be gentle...

[4-n-zics]

just got an xp2500 barton. stepping code AQYHA 0414VPMW .

Can anyone tell me what these are like to overclock.... newbie here , so be gentle...
the only way to really know is to try it and see what you get.. different components (motherboards, RAM, etc.) overclock differently...

your 2500+ is locked (unless it is a Moblie 2500+.. if so, check the Mobile FAQ sticky and Mobile CPU overclock sticky) so the overclock will be limited to the FSB only.

[chubster70]

the only way to really know is to try it and see what you get.. different components (motherboards, RAM, etc.) overclock differently...

your 2500+ is locked (unless it is a Moblie 2500+.. if so, check the Mobile FAQ sticky and Mobile CPU overclock sticky) so the overclock will be limited to the FSB only.

Thanxs m8, managed to raise fsb to 182mhz = 2ghz and its pretty stable. cant raise the volts as its locked but i read in a mag about placing a piece of wire in two holes of the cpu slot (on the motherboard) which is supossed to unlock the cpu....ever heard of this working? -----regards chubster70

[4-n-zics]

post week 39 of 2003 CPUs cannot be unlocked by any means.. they are hard locked like Intel CPU. there might be a pin mod you can do to change the stock voltage, but I am not sure what that might be (or if there even is one)..

[Grimm]

Just picked up a Thoroughbred B 2400+ for $70 including the cheap MB.

AXDA2400DKV3C
Z399S24B41309
KIXJB0408VPMW


Athlon XP Processor Low-quality
Core Thoroughbred-B
CPU Model 8
Manufacturing Process 130 nm
Approximate Transistor Count 37.6 million
Approximate Die Size 84 sq. mm
Performance Rating 2400+
Working frequency 2000 MHz
Package Type OPGA
Operating Voltage 1.65 V
Max Die Temperature 85° C
L1 Cache Size 128 KB
L2 Cache Size 256 KB
Multiplier 15x
FSB Frequency 266 MHz
Stepping Code KIXJB
Manufacture Year 2004
Manufacture Week 08
Production Batch M
Batch Production Number 1309
Looks like it was worth about what I paid for it :rolleyes:

Does the "Low-Quality" mean it was near the edge of the die?

[4-n-zics]

you would have been better off with a Mobile 2400+

that one you just got is multiplier locked..

with a locked multiplier at 15 you are not going to be able to get a very high FSB..

[Grimm]

you would have been better off with a Mobile 2400+

that one you just got is multiplier locked..

with a locked multiplier at 15 you are not going to be able to get a very high FSB..
No argument there, but I was looking for cheap. I got a boxed cpu and MB for $70. I might try to bump it up a bit, but my main problem is going to be heat. Well, that and I am trying to save some money atm. So for $70 and some spare parts I have around a dead comp becomes a fair folding rig.

I mean I would like to bump it up, but that has to be secondary to actualy getting the box up and running. I suppose I could have blown the $250 for the 3Ghz P4 and MSI MB...

[4-n-zics]

you could have gotten a Mobile 2400+ for around the same price..

[Grimm]

you could have gotten a Mobile 2400+ for around the same price..
$77 at newegg.com and that is OEM, no hsf. So, $15 for the fan and another $40 minimum for hte motherboard = $132. This is no where near $70.

[4-n-zics]

I missed the part about "with cheap motherboard"....

[darnfool]

As I had no choice in what I was sent :) I'll just overclock as much as I can and post my results with my KX18D.

Here's what I got:

AXMH2400FQQ4C
AQYHA 0415UPMW

Thanks,
darnfool

[frootbooter]

As I had no choice in what I was sent :) I'll just overclock as much as I can and post my results with my KX18D.

Here's what I got:

AXMH2400FQQ4C
AQYHA 0415UPMW

Thanks,
darnfool

You know, everyone is all about how the A steppings suck, but mine OC's about as good as any of the I steppings I've seen (better than quite a few).

[Crispy]

I read this stepping stuff and i still dont get it how do i step and what dose it do??

[4-n-zics]

I read this stepping stuff and i still dont get it how do i step and what dose it do??
you don't do anything.. the stepping is a code on the CPU.. some steppings overclock better than others. they also give an indication of what CPU you have:

[Crispy]

K i get that. But what about when u open Wcpuid and it seas Stepping ID??

mine has a 0 but i have seen ppl have diffrent to that off what i have??