- Joined
- Feb 18, 2002
Barton is better than > Thoroughbred B is better than > Thoroughbred A is better than > Palomino.
Make sure your mobo's official web site supports the CPU core before upgrading.
All DMT3C are Palomino's.
Example code: AXDA2100DUT3C AIUHB 0248MPMW
0248 stands for 2002 week 48
T-Bred A's have a stepping code which ends in "A": xxxA are T-Bred A's
T-Bred B's have a stepping code which ends in "B": xxxB are T-Bred B's (like the example code AIUHB above)
That's why the last letter of the stepping code is important.
DLT3C or DUT3C is not enough as it can be one or the other for some of them:
1600+: DLT3C T-Bred A; | DLT3C & DUT3C T-Bred B (rarely seen)
1700+: DLT3C T-Bred A; | DLT3C & DUT3C T-Bred B
1800+: DLT3C T-Bred A; | DLT3C & DUT3C T-Bred B
1900+: DLT3C T-Bred A; | DLT3C & DUT3C T-Bred B
2000+: DKT3C T-Bred A; | DUT3C could be either a T-Bred A or T-Bred B
The only way to distinguish between the two is by the stepping code last letter (A or B).
except if the second letter of the code is Q -- then it's a Thorton.
2100+: DUT3C could be either a T-Bred A or T-Bred B
The only way to distinguish between the two is by the stepping code last letter (A or B).
2200+: DKV3C T-Bred A; | DUV3C T-Bred B
except if the second letter of the code is Q -- then it's a Thorton.
2300+: There are no 2300+ (!) Some companies marketed 2400+'s as 2300+'s
2400+: All 2400+s are T-Bred B's (no A's). DKV3C and DUT3C are both T-Bred B's
except if the second letter of the code is Q -- then it's a Thorton.
2500+ All 2500+s are Bartons. Second letter of the code is Q
2600+
DKV3C [133] x 16 = 2133 MHz T-Bred B, Last letter of the code is B or
DKV3D [166] x 12.5 = 2083 MHz T-Bred B, Last letter of the code is B
except if the second letter of the code is Q -- then it's a DKV3D Thorton. or
DKV4D [166] x 11.5 = 1917 MHz Barton, Second letter of the code is Q
2700+ are all DKV3D Thoroughbred B's (No A's, no Bartons).
2800+ DKV4D [166] x 12.5 Barton with second letter of the code being Q or
DKV3D [166] x 13.5 T-Bred B with last letter of the code being B (rarely seen).
http://www.c627627.com/AMD/AthlonXP/
http://members.cox.net/alpha_03/installation.htm
3000+ DKV4D [166] x 13 Barton or
DKV4E [200] x 10.5 Barton
3200+ DKV4D [166] x 14 Barton or
DKV4E [200] x 11 Barton
Athlon64:
ADA3000AEP4AP
ADA3200AEP5AP
ADA3400AEP5AP
6 = 2MB cache
5 = 1MB cache
4 = 512KB cache
3 = 256KB cache
==================================================
EDIT: Unlike the above posted info, the following is controverisal as no one except AMD knows for sure what the second part of the CPU marking stands for.
EDIT EDIT: Again:
THE FOLLOWING INFORMATION IS FOR REFERENCE ONLY.
There are more and more examples contradiciting these initial, possibly wrong opinions.
For example: AIUHB 0248MPMW
See where it says >>MPMW<< after the AIUHB stepping,
MPMW
- The first letter is inconclusive.
- All Athlon XP's have a P as their second letter.
- Those with lower third letters (closer to A) do better than those with higher ones (closer to Z), this is considered to indicate wafer integrity. EDIT: Once again, there are many examples of the third letter 'A' CPUs not being good overclockers making this a very controversial theory.
- Every AMD ever ends in a W. EDIT: Turns out they end in W or have no fourth letter.
If you doubt the validity of the significance of the third letter, consider Gautam's reasoning:
Make sure your mobo's official web site supports the CPU core before upgrading.
All DMT3C are Palomino's.
Example code: AXDA2100DUT3C AIUHB 0248MPMW
0248 stands for 2002 week 48
T-Bred A's have a stepping code which ends in "A": xxxA are T-Bred A's
T-Bred B's have a stepping code which ends in "B": xxxB are T-Bred B's (like the example code AIUHB above)
That's why the last letter of the stepping code is important.
DLT3C or DUT3C is not enough as it can be one or the other for some of them:
1600+: DLT3C T-Bred A; | DLT3C & DUT3C T-Bred B (rarely seen)
1700+: DLT3C T-Bred A; | DLT3C & DUT3C T-Bred B
1800+: DLT3C T-Bred A; | DLT3C & DUT3C T-Bred B
1900+: DLT3C T-Bred A; | DLT3C & DUT3C T-Bred B
2000+: DKT3C T-Bred A; | DUT3C could be either a T-Bred A or T-Bred B
The only way to distinguish between the two is by the stepping code last letter (A or B).
except if the second letter of the code is Q -- then it's a Thorton.
2100+: DUT3C could be either a T-Bred A or T-Bred B
The only way to distinguish between the two is by the stepping code last letter (A or B).
2200+: DKV3C T-Bred A; | DUV3C T-Bred B
except if the second letter of the code is Q -- then it's a Thorton.
2300+: There are no 2300+ (!) Some companies marketed 2400+'s as 2300+'s
2400+: All 2400+s are T-Bred B's (no A's). DKV3C and DUT3C are both T-Bred B's
except if the second letter of the code is Q -- then it's a Thorton.
2500+ All 2500+s are Bartons. Second letter of the code is Q
2600+
DKV3C [133] x 16 = 2133 MHz T-Bred B, Last letter of the code is B or
DKV3D [166] x 12.5 = 2083 MHz T-Bred B, Last letter of the code is B
except if the second letter of the code is Q -- then it's a DKV3D Thorton. or
DKV4D [166] x 11.5 = 1917 MHz Barton, Second letter of the code is Q
2700+ are all DKV3D Thoroughbred B's (No A's, no Bartons).
2800+ DKV4D [166] x 12.5 Barton with second letter of the code being Q or
DKV3D [166] x 13.5 T-Bred B with last letter of the code being B (rarely seen).
http://www.c627627.com/AMD/AthlonXP/
http://members.cox.net/alpha_03/installation.htm
3000+ DKV4D [166] x 13 Barton or
DKV4E [200] x 10.5 Barton
3200+ DKV4D [166] x 14 Barton or
DKV4E [200] x 11 Barton
Athlon64:
ADA3000AEP4AP
ADA3200AEP5AP
ADA3400AEP5AP
6 = 2MB cache
5 = 1MB cache
4 = 512KB cache
3 = 256KB cache
==================================================
EDIT: Unlike the above posted info, the following is controverisal as no one except AMD knows for sure what the second part of the CPU marking stands for.
EDIT EDIT: Again:
THE FOLLOWING INFORMATION IS FOR REFERENCE ONLY.
There are more and more examples contradiciting these initial, possibly wrong opinions.
For example: AIUHB 0248MPMW
See where it says >>MPMW<< after the AIUHB stepping,
MPMW
- The first letter is inconclusive.
- All Athlon XP's have a P as their second letter.
- Those with lower third letters (closer to A) do better than those with higher ones (closer to Z), this is considered to indicate wafer integrity. EDIT: Once again, there are many examples of the third letter 'A' CPUs not being good overclockers making this a very controversial theory.
- Every AMD ever ends in a W. EDIT: Turns out they end in W or have no fourth letter.
If you doubt the validity of the significance of the third letter, consider Gautam's reasoning:
Gautam: said:Austin was where I first got this info from, btw. What first gave me a heads up about the third letter being significant were the GameVe DLT3C's. Unlike the ones from Excal and SVC, these were nothing spectacular at all. They did about as well, if not worse as a DUT3C, maxing out at 2.2-2.3 on air, 200mhz or more below the DLT3C's. The only thing that looked odd in their stepping codes were the third letter- TPXW. I have seen TPMW's, and they do just as well as any other DLT3C. But these X's were clearly worse. There was a huge thread on amdmb.com about them, and all of them did rather poorly in comparison to other DLT3C's.
One of the best Barton steppings was the AQUCA XPAW. Most that you see these days are AQXCA XPMW's, and they do not seem to do as well. IF you look on the Vr-zone lists of the best overclockers of both Bartons and T-Breds, the front pages are dominated by processors of several stock speeds, but almost all having their third letter as A's, B's and C's. I'll do some more searching, but for now that's the best I've got.
Basically, I've been hunting down the 4 letter codes, and I can't draw any conclusions about any of the letters in it from own findings except for the third letters. TPMW's, UPMW's, VPMW's, WPMW's and XPMW's all perform the same, but an XPAW's seem to be better than XPMW's within the same processor type. All 1700+'s are xPMW's, so we can't say anything for sure about them, but within Barton 2500+'s, xPAW's appear to be better than xPMW's. The difference between A and M appears to be negligible at most, though, but the difference between an M and an S or X is rather large.
Last edited: