AMD Athlon XP “Thoroughbred” processors are simply made for overclocking and overclockers, as we now understand. Even though the first experiences with such CPUs were not considered as positive, now a lot of these processors may be overclocked pretty easily. As we know, most of the chips come with unlocked multipliers, while others work at lowered core voltage speeds what gives us excellent opportunities to overclock them after increasing Vcore to normal 1.6V and even have no problems with cooling. What we definitely were not aware of is that at least some lower-end AMD Athlon XP “Thoroughbred” processors with B0 core are remarked higher end-processors!
Our friends from a well-known OverClockers.ru web-site have found out that a site with a bloody name Bloodys.com offers its visitors this script for revealing all the information about Athlon XP CPU. Among all the technical data about the microprocessor, the script also tells you if your microprocessor was “downgraded” from a faster chip! Apparently, there are digits in the marking of AMD Athlon XP “Thorougbred” CPUs that describe the speed this particular CPU was designed to work at but was later “downgraded” or maybe even “upgraded” in certain cases. Take a look at the example of how the Athlon XP “Thoroughbred” processors are marked:

According to the source, the eights and nineth marks (these should be numbers, as shown below) in the second line of the sticker describes the initial speed the processor was designed for (RFBEXR2280073). If the initial model number is higher than the number you have, it means that your processor has been downgraded.
The owner of the web-site explains that “downgraded” in this case means that the CPU was not able to maintain full stability at the given rating with default voltage, so it was remarked to a lower model number. For example, 1700+ downgraded from 2400+ means that this CPU cannot work at 2400+ with core voltage 1.6V, but it can probably hit this and maybe even higher frequencies with voltage increase.
There are rumors that AMD re-stamped the markings of some high-speed CPUs to fulfill the huge demand for lower-speed ones (mostly 1700+ and 2100+), if this is your case, then the CPU should be able to work stable even at 2400+ with the default voltage. I think it firstly concerns AMD Athlon XP “Thoroughbred” processors with B0 stepping that have much higher overclocking potential compared to A0 chips.
The information is totally unofficial and therefore no one can guarantee that it is fully correct or true. At this point the data was collected by the author of the script as well as our friends over OverClockers.ru. It was revealed that even if the information is misleading, the processors worked fine at the “initial” speed with Vcore increase.
Comments currently:
28
Discussion started: 03/20/03 12:57:35 AM
Latest comment: 10/18/05 08:22:23 AM
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1.
Has any body tried the bloddys.com script ?... Does it give accurate Info?
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Posted by: Kyro

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Date: 03/20/03 12:57:35 AM]
2.
GREAT :-)
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Posted by: MUMINEK POLAND

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Date: 03/20/03 12:59:07 AM]
3.
this is not the first time things like this happen. remember the radeon 9500?
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Posted by: doomey

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Date: 03/20/03 02:07:18 AM]
4.
Bloddys.com script works bad. But info is fine :)
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Posted by: Tester

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Date: 03/20/03 10:39:15 AM]
5.
Well it doesn't work for my chip. It says I'm downgraded from a 2700+ to a 1700+ but I can't run 2700+ speeds at stock voltage. As a matter of fact it takes 2.0 volts to run that speed.
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Posted by: freeloader

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Date: 03/20/03 02:20:57 PM]
6.
Thats why i just bought myself a 1700+ JIUHB 0302 :)
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Posted by: mange

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Date: 03/20/03 02:21:39 PM]
7.
This is one of the reasons I stick to AMD CPU.
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Posted by: krairach

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Date: 03/20/03 07:41:20 PM]
8.
to freeloader
maybe ur cpu was originally made for 2700+ but it fails the QC and then downgraded to 1700+ :P
juz guessing :P
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Posted by: flow

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Date: 03/21/03 01:16:53 AM]
+ expand thread (3 answers)
- collapse thread
ok the source of that article was written by me after Chinese New Year, at a Malaysian local website's forum.
U can check here:
http://forum.isentral.com/index.php?s=3b46b4d7b04a261837af70 5575168ced&act=ST&f=5&t=179&st=0
I dun have any ideas about the bloody website script and other related articles about this downgrading issue (they posted those article/scripts about 1 month later than what I did), I pretty sure that those of the sites were copying info from my article.
But I don't bother about copyright issue..Just want to share info with you all.
U can add your comment there, TQ.
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Posted by: Austin

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Date: 03/21/03 09:37:47 AM]
well iam running a 1900+ and it runs at 1900+ speeds tho its a2nd gen XP CPU. i run it now on a soyo dragon ultra withthe bus left at 266. and PC2700 RAM at 333mhz like it should
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Posted by: Mike/Matrix_overload

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Date: 03/21/03 12:18:55 PM]
Thank you, Austin! This is a great info
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Posted by: Gavric

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Date: 03/21/03 04:57:39 PM]
9.
My numbers on cpu:
AXDA1700DUT3C 9808067280178 JIUHB0307SPAW
So if it's true, i have 2800 for cheap price.
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Posted by: Bazz

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Date: 03/21/03 04:00:46 PM]
10.
hi,
i have 1700+ and the script says it is downgraded 2500+, but the 2500+ doesn't exist... could anybode tell me what does it mean? thx
my numbers:
AXDA1700DLT3C 9233796250337 JIUHB0308SPMW
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Posted by: Kozel

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Date: 03/23/03 11:03:03 AM]
+ expand thread (4 answers)
- collapse thread
exist but t is based on barton core. and probably you bought your processor before AMD introdused this model. up to me this staff about the 8th and 9th digit is bullshit.
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Posted by: jonko

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Date: 03/23/03 10:51:14 PM]
I don't think so, i bought it a week ago and the manufacture week is 8!!! The manufacture year is 2003. Maybe I have a Barton... :-)
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Posted by: Kozel

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Date: 03/24/03 11:52:03 AM]
No, I bought it a week ago, the production date is 0803 - 8th week of 2003. Do I have a Barton core? :-) hope so...
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Posted by: Kozel

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Date: 03/24/03 11:57:06 AM]
sorry, f@#%^ hesitation.
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Posted by: Kozel

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Date: 03/24/03 11:59:40 AM]
11.
It worked for me!
i bought a 2100+ downgraded from a 2800+
mine is running at 2250Mhz right now :)
very happy.
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Posted by: Sage

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Date: 03/23/03 03:26:37 PM]
12.
i am not a proffesional but this article is rediculus! on the example mentioned obove i understood that the 8th and 9th digit 28 stand for atlon XP 2800+! if so can you tell me how such CPU can be produced in 1999? i thoght it (XP 2800+) came on the market in the begining of this year (2003) though they anounced it in octomber last year. What exactly do you mean these digits describe the initial speed the processor was designed for?
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Posted by: jonko

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Date: 03/23/03 10:45:27 PM]
13.
Wow. Great website guys, seesm I have a nice CPU sitting here.
1800+ downgraded from a 2600+ :-D
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Posted by: Thomas

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Date: 03/23/03 11:37:19 PM]
14.
cool...awesome...bad ass shit :)
this is what i got from bloodys
Core Thoroughbred-B
CPU Model 8
Performance Rating 2600+
Working frequency 2133 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 15.5x
FSB Frequency 266 MHz
Stepping Code AIUAB
Manufacture Year 2002
Manufacture Week 31
Production Batch A
Batch Production Number 0073
Downgraded from 2800+
is this shit it true than i have downgraded 1800+ ??
i don't believe that.
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Posted by: hasan

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Date: 03/25/03 05:07:34 AM]
15.
Just received 3-Athlon 1700 AXDA1700DUT3C
JIUHB0310 and they will all run at 200 fsb x 11 at default voltage on the
new Epox 8RDA+. The cpu benchmark on soft sandra 2003 is 8304 which
is faster than an Athlon 3000 or P4 3.06 ghz chip. I bought these out of Ca for $57.00 a piece. They ide at 39C with coolmaster copper heatsink. I will put on a thermalright copper heatsink and 60 cfm fan and try to hit 2.4 ghz.
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Posted by: Amd Rowlett

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Date: 03/27/03 08:47:09 PM]
16.
I understood, your point.
AMD is scoring towards Intel!!!
AMD FOREVER!!!
keep in touch.
Great news!!!
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Posted by: informan

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Date: 09/09/03 03:54:54 PM]
17.
I have an Athlon 2400 XP on a ECS K7S5A Mobo. 512 Mem, Win XP pro.
Problem is, I restart the system and it will not POST (no video).
I have to restart it about three times before it reboots.
I've replaced the board, CPU, Mem, P/S is 350w.
Any suggestions would be helpful
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Posted by: KF6EII

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Date: 10/23/03 09:18:14 PM]
18.
If this story/script is at all correct, it doesn't apply to my CPUs. They're 2400+ Thortons, maybe this info is only valid for T-breds?
Marking: AXDC2400DKV3C 108799S->A4
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Posted by: Seehund

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Date: 03/30/04 06:24:58 PM]
19.
Crap, my post was interpreted as HTML and got truncated. Anyway, my CPUs would really be "A400+" if this story was applicable to them.
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Posted by: Seehund

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Date: 03/30/04 06:27:02 PM]
20.
mira coño de tu madre esa mierda no sirve pa un coño mandale a hacerle overclock al coño e tu madre
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Posted by: jameshaker

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Date: 06/11/04 05:39:12 AM]