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AMD Athlon XP 1800+ - AX1800DMT3C

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AMD Athlon XP 1800+ specifications

General information
TypeCPU / Microprocessor
Market segmentDesktop
FamilyAMD Athlon XP
Model number  ? 1800+
CPU part numberAX1800DMT3C is an OEM/tray microprocessor
Frequency  ? 1800+ (rated)
1533 MHz (real)
Bus speed  ? 266 MHz
Clock multiplier  ? 11.5
Package453-pin organic PGA
1.95" x 1.95" (4.95 cm x 4.95 cm)
AMD Package number27111
SocketSocket A (Socket 462)
Introduction date9-Oct-01
Price at introduction$252
Architecture / Microarchitecture
Processor core  ? Palomino (Model 6)
Manufacturing process0.18 micron copper process
Die size129.26mm2 (total)
105.72mm2 (without L2 cache)
Data width32 bit
The number of cores1
The number of threads1
Floating Point UnitIntegrated
Level 1 cache size  ? 64 KB code
64 KB data
Level 2 cache size  ? Full-speed on-die 256 KB
  • MMX instructions
  • Extensions to MMX
  • 3DNow! technology
  • Extensions to 3DNow!
  • SSE / Streaming SIMD Extensions
Low power features
  • Halt state
  • Stop Grant states
  • Sleep state  ? 
  • Probe state
Integrated peripherals / components
Integrated graphicsNone
Electrical / Thermal parameters
V core  ? 1.75V
Minimum/Maximum operating temperature  ? 0°C - 90°C
Minimum/Typical/Maximum power dissipation2 Watt (Stop Grant mode) / 59.2 Watt / 66 Watt
Notes on AMD Athlon XP 1800+
  • Actual bus frequency is 133 MHz. Because the processor uses Double Data Rate bus the effective bus speed is 266 MHz.

Detailed side-by-side comparison

For detailed comparision of the AMD Athlon XP 1800+ and any other other chip from our CPU database type in a chip name and/or its partial specs:

You can specify any of the following: manufacturer name, family name, model number, part number, core name, socket name, operating frequency, bus speed, and the last level cache. Here are examples of searches: 1800+, AX1800DMT3C, AMD Athlon XP , Palomino (Model 6) Socket A (Socket 462)

Historical price chart

The chart below shows official prices of AMD Athlon XP 1700+, 1800+ and 1900+ processors:

Historical official prices of Athlon XP 1700+, 1800+ and 1900+ processors


Q: I have an AMD Athlon XP 1800+ microprocessor. Can I upgrade it?
A: Probably yes. Processor compatibility is determined by your motherboard. Please check resource for CPU support list for your board.

Athlon XP 1800+ Overclocking

Sorry, overclocking information is not available at this time.

CPU ID information for the Athlon XP 1800+

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Use our CPU identification tool to check features of your CPU.

NOTE: The CPU ID information below was taken from one CPU and may include features that are not present in all different steppings of the AMD Athlon XP 1800+ CPU.

CPU Family:Athlon XP
Model Number:1800+
Frequency:1540 MHz
Part number:
Stepping Code:AGOIA 0228RPFW
Comment:Palomino 27111
Submitted by:Neon
General information
Processor name (BIOS):AMD Athlon(tm) XP 1800+
Processor type:Original OEM Processor
Core stepping:A5
CPUID signature:662
Family: 6 (06h)
Model: 6 (06h)
Stepping: 2 (02h)

Cache: L1 data L1 instruction L2
Size: 64 KB 64 KB 256 KB
Associativity: 2-way set
2-way set
16-way set
Line size: 64 bytes 64 bytes 64 bytes
Lines per tag: 1 1 1
Instruction set extensionsAdditional instructions
AMD extensions to MMX CMPXCHG8B
Extensions to 3DNow! SYSCALL/SYSRET
Major featuresOther features
On-chip Floating Point Unit 36-bit page-size extensions
  Advanced programmable interrupt controller
  Debugging extensions
  Machine check architecture
  Machine check exception
  Memory-type range registers
  Model-specific registers
  Page attribute table
  Page global extension
  Page-size extensions (4MB pages)
  Physical address extensions
  Temperature sensor
  Time stamp counter
  Virtual 8086-mode enhancements

CPUs, related to AMD Athlon XP 1800+ (Palomino)

Model Frequency L2
AMD Athlon XP family, Socket 462
   Athlon XP 1800+ (Palomino)1.53 GHz256 KBSSE 
   Athlon XP 2800+ (LV, 1.65V)2.08 GHz512 KBSSE>
   Athlon XP 2800+ (333FSB, 512KB)2.08 GHz512 KBSSE>
   Athlon XP 2800+ (LV, 1.5V)2.08 GHz512 KBSSE>
   Athlon XP 3000+ (LV)2.1 GHz512 KBSSE>
   Athlon XP 3000+ (400FSB)2.1 GHz512 KBSSE>
   Athlon XP 2600+ (266FSB)2.13 GHz256 KBSSE>
   Athlon XP 2600+ (Thorton)2.13 GHz256 KBSSE>
   Athlon XP 2800+ (266FSB)2.13 GHz512 KBSSE>
   Athlon XP 2700+ (256KB)2.16 GHz256 KBSSE>
   Athlon XP 3100+2.2 GHz256 KBSSE>
   Athlon XP 3000+ (333FSB)2.16 GHz512 KBSSE>
   Athlon XP 3200+ (400FSB)2.2 GHz512 KBSSE>
   Athlon XP 2800+ (333FSB, 256KB)2.25 GHz256 KBSSE>
   Athlon XP 3200+ (333FSB)2.33 GHz512 KBSSE>
Other families, K7 micro-architecture, Socket 462
   Duron 1.4 GHz (DHD1400DLV1C)1.4 GHz64 KBSSE>
   Athlon 1.4 GHz (A1400AMS3B)1.4 GHz256 KBSSE>
   Athlon 1.4 GHz (A1400AMS3C)1.4 GHz256 KBSSE>
   Athlon 1600+1.4 GHz256 KBSSE>
   Duron 1.6 GHz (DHD1600DLV1C)1.6 GHz64 KBSSE>
   Duron 1.8 GHz (DHD1800DLV1C)1.8 GHz64 KBSSE>
   Sempron 2800+ (Thorton)2 GHz256 KBSSE>
   Sempron 3000+2 GHz512 KBSSE>
   Sempron 3300+2.2 GHz512 KBSSE>
 • Within each category, the CPUs are sorted from slower (at the top) to faster (at the bottom)
 • Background color of specs and features indicate whether they are better or worse than similar spec/feature of the Athlon XP 1800+ (Palomino)
 • Click on the >  icon to compare any CPU in the table with the AMD Athlon XP 1800+ (Palomino) (Javascript required).
 • List of related CPUs is not complete.
 • Features abbreviations:
SSE - SSE instructions

Pictures (14)

Green plastic

AMD Athlon XP 1800+ - AX1800DMT3C
2006-11-03 13:59:52
Posted by: thibbea

2007-01-12 10:32:47
Posted by: Piotrek

AMD Athlon XP 1800+ - AX1800DMT3C
2007-04-02 22:07:58
Posted by: Zeke_D

A piar of 'em, pick which one you want for the site!
another picture
2007-06-29 04:01:33
Posted by: UCFnet002

This is my good ol' XP 1800+ :-)
another picture
2007-08-12 20:27:02
Posted by: numyer

Used to run on my Epox 8KTA3+
retail box
2009-07-30 13:31:22
Posted by: Neon

featuring QuantiSpeed
retail box
My AthlonXP 1800+
2009-11-02 02:45:46
Posted by: MamBO

Code:AX1800DMT3C, Step Code:AGNGA
My AthlonXP 1800+
AX1800DMT3C ; Package #27111
2011-03-06 17:21:37
Posted by: Computer Guru; Adventure

Salvaged from a dead consumer-built system.
AX1800DMT3C ; Package #27111
2011-07-14 12:21:30
Posted by: JUAN CARLOS

2014-02-25 07:10:15
Posted by: pineapple face

2014-02-25 12:41:56
Posted by: bougui

2014-02-25 12:42:35
Posted by: bougui

2014-02-25 12:43:04
Posted by: bougui

Comments (10)

You're welcome to post suggestions, corrections, your own personal AMD Athlon XP 1800+ review, or your experience with the microprocessor. Please do not ask upgrade and troubleshooting questions, and do not start discussions.

Athlon XP 1800+

2006-11-03 13:02:04
Posted by: soeren

got this from a friend

Athlon XP 1800+


2006-11-22 11:32:58
Posted by: nemesis

stupid, thsi is not a AX1800DMT3C on your friends picture.

last picture

2007-01-11 17:44:44
Posted by: szejk

Last picture is invalid. This is not Palomino...


2007-08-14 06:40:38
Posted by: Ewout

One of the last(?) brown Palomino AthlonXP with AGKGA stepping. It is from week 48 2001.

It has a chipped upper right corner, but it still works perfectly, yet hot :)

latest brown Palomino

2007-10-16 10:17:06
Posted by: Cespuglio50

This could actually be the latest Palomino on brown suit. It is marked 12th week of 2002. Even with a hole in the upper left corner it still works at 1,150 GHz.

latest brown Palomino

latest brown Palomino

2007-10-17 12:21:08
Posted by: Cespuglio50.-

Hi it's me again. That mobo wasn't set up right. I just found the right settings and, despite of his hole on the upper left corner, now is working at his speed 1.533 MHz. Very sturdy CPU...

latest brown Palomino

Brown Palomino

2007-10-22 12:13:04
Posted by: RandomNameHere

I don't know if my CPU or my mobo is busted.
But I tried to increase the FSB to 133 from 100, it is supposed to run at 1.5ghz not 1.15ghz right?

Brown Palomino

Response: Yes, it should run at 133 MHz FSB


2008-12-15 04:51:22
Posted by: evil bastard

when clock is 100 it works on 1450, and on 133 is 1.93=2.0

Overclocked and stable

2009-12-22 23:51:16
Posted by: RG Fury

I've had the Athlon 1800 cpu in my computer for about 4 years now, and not having the funds to upgrade my entire system, I FINALLY decided to try out the overclock features on my Gigabyte GA-7VAX (KT400 series) motherboard.

I went from the original 1.53ghz to, with 100mhz x 18 (clocking at 1.84ghz) it is now registering as an Athlon XP 2200+
and stable for 1 week straight now

I would LOVE to see how far this cpu could be pushed, however, the multiplier does not go past 18x on this motherboard :/

Oh well, coupled with 2gb of DDR 400mhz ram and an ATI Sapphire 3850 HD 512mb AGP graphics card, I am able to play EVE online at medium graphics levels with 0 crashes and a smoooth framerate.

(the same as my buddies brand new $1500 setup with a duel core Intel 2.4ghz cpu)

Altogether, very impressed with this old cpu. Even with the overclock, and original cpu cooler, its only reading 8 degrees Celsius warmer than stock settings at max load.

I would recommend anyone still rocking the Athlon 1800 to try overclocking before dropping big money on a new system. Total system upgrades for me from memory express:

1gb Kingston DDR 400mhz ram = $35
Sapphire 3850 HD 512mb AGP vid card = $120
(AGP is a 'dead' technology now, you may need PCI, or PCI express card depending on your motherboard)
450w Corsair powersupply = $80
(450w minimum required to run new graphics card, I previously had 360w Thermaltake PS)

Total = $235
Comparable system now days, new, $600-800


2010-06-03 21:45:57
Posted by: AMD LOVERS

I use this processor for nearly 5 years, it run perfect. The only problem is regarding with heat, but never mind I upgrade original heat sink with powerful fan and it run cool- about 50 degree c.

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