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AMD Phenom II X4 840T - HD840TWFK4DGR

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AMD Phenom II X4 840T specifications

General information
TypeCPU / Microprocessor
Market segmentDesktop
FamilyAMD Phenom II X4
Model number  ? 840T
CPU part number
  • HD840TWFK4DGR is an OEM/tray microprocessor
Stepping codesACBBE CB   CCBBE CB
Frequency  ? 2900 MHz
Turbo frequency3200 MHz
Bus speed  ? 2000 MHz (HyperTransport link)
Clock multiplier  ? 14.5
Package938-pin organic micro-PGA
SocketsSocket AM2+
Socket AM3
Weight1.3oz / 38.1g
Introduction date3rd quarter 2010
Architecture / Microarchitecture
Processor core  ? Zosma
Core stepping  ? PH-E0
Manufacturing process0.045 micron SOI
Die size346mm2
Data width64 bit
The number of cores4
The number of threads4
Floating Point UnitIntegrated
Level 1 cache size  ? 4 x 64 KB 2-way associative instruction caches
4 x 64 KB 2-way associative data caches
Level 2 cache size  ? 4 x 512 KB 16-way associative caches
Level 3 cache size6 MB shared cache
  • MMX instructions
  • 3DNow! technology
  • SSE / Streaming SIMD Extensions
  • SSE2 / Streaming SIMD Extensions 2
  • SSE3 / Streaming SIMD Extensions 3
  • SSE4a  ? 
  • ABM / Advanced Bit Manipulation  ? 
  • AMD64 / AMD 64-bit technology  ? 
  • AMD-V / AMD Virtualization technology
  • EVP / Enhanced Virus Protection  ? 
  • Turbo Core technology
Low power featuresCool'n'Quiet 3.0
Integrated peripherals / components
Integrated graphicsNone
Memory controller
  • The number of controllers: 1
    Memory channels: 2
    Channel width (bits): 72
    Supported memory: DDR2-1066, DDR3-1333
    DIMMs per channel: up to 2
    Maximum memory bandwidth (GB/s): 21.3
Other peripheralsHyperTransport 3.x technology
Electrical / Thermal parameters
Thermal Design Power  ? 95 Watt

Popular Phenom II X4 840T comparisons:

Detailed side-by-side comparison

For detailed comparision of the AMD 840T 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: 840T, HD840TWFK4DGR, AMD Phenom II X4 2.9GHz, Zosma Socket AM2+, Socket AM3


Q: Is it possible to upgrade my Phenom II X4 840T processor?
A: Probably yes. CPU compatibility is determined by your motherboard. Please check website for CPU support list for your board.

Phenom II X4 840T Overclocking

Sorry, overclocking information is not available at this time.

Related news stories

AMD Phenom II X4 840T unlocks to six-core
Nov 03, 2010: Phenom II X4 840T microprocessors were launched in the third quarter 2010, but so far they were available only in OEM systems from Hewlett-Packard, and no processors made it into retail stores. Last month a handful of 840T parts appeared on auction sites in Asia.

AMD Phenom II X4 840T and 960T CPUs are shipped in Hewlett-Packard PCs
Sep 28, 2010: It seems that all latest desktop AMD OEM microprocessors end up in Hewlett-Packard PCs. Just two days ago we learned about HP Pavilion Elite HPE-410f and HPE-460z desktop computers, now available in stores with Phenom II X6 1045T CPU. Earlier this year we reported on Sempron 180 processors, spotted in Compaq Presario CQ3211CX and three other PCs, Sempron 145 and Athlon II X2 220 CPUs in HP Compaq 6005 Pro computers, and there were a few others. This time we discovered that two new quad-core OEM microprocessors with model numbers 840T and 960T are shipped in HP Pavilion Elite HPE-400z series PC. The Phenom II 840T is also available in HP Pavilion Slimline s5660f computer.

Compare AMD 840T benchmark results with all tested CPUs from one of the following families:

To compare this Phenom II X4 CPU with any tested processor please proceed to

For additional benchmarks, comparing multi-threaded performance of this microprocessor with other Phenom II X4 CPUs and the fastest AMD and Intel x86 chips, please visit AMD Phenom II X4 840T benchmarks page.

AMD 840T Benchmarks

The graphs below show up to 10 microprocessors with approximately the same level of integer (CPU), floating-point (FPU), SIMD and memory performance. All processors were not overclocked, and were tested at a nominal frequency, with a stock heatsink and default BIOS settings. Click on the '?' mark next to each model name to see specifications of that model, and details of the test platform. To find out how the 840T compares to other CPUs in specific benchmarks or in aggregate milti-threading performance please see benchmark tools section on the right.

Benchmarked processor

CPU vendor string:AuthenticAMD
CPU name string:AMD Phenom(tm) II X4 840T Processor

Integer performance

Part number   Result
AMD Phenom II X4 B95  ? 
AMD A8-3850  ? 
Intel Core 2 Quad Q6600  ? 
AMD Athlon II X4 635 (rev. C3)  ? 
AMD Athlon II X4 635 (rev. C2)  ? 
AMD Phenom II X4 840T  ? 
AMD Athlon II X4 641  ? 
Intel Core 2 Quad Q8200  ? 
AMD Phenom II X4 925 (rev. C2)  ? 
AMD Athlon II X4 630 (rev. C3)  ? 
AMD Athlon II X4 630 (rev. C2)  ? 

Floating Point performance

Part number   Result
AMD Athlon II X4 640 (rev. E0)  ? 
Intel Core i5-2500S  ? 
AMD Phenom II X4 960T  ? 
Intel Core i5-680  ? 
AMD A8-3850  ? 
AMD Phenom II X4 840T  ? 
AMD Athlon II X4 635 (rev. C3)  ? 
AMD Athlon II X4 635 (rev. C2)  ? 
Intel Core i5-750  ? 
AMD FX-6350  ? 
AMD Athlon II X4 641  ? 

MMX / SSE / SSE2 performance

Part number   Result
AMD A10-5800K  ? 
AMD Athlon II X4 640 (rev. E0)  ? 
AMD A8-3850  ? 
AMD A10-6700  ? 
AMD Athlon X4 760K  ? 
AMD Phenom II X4 840T  ? 
Intel Core 2 Quad Q6700  ? 
AMD FX-4150 (125W)  ? 
AMD FX-4300  ? 
Intel Core i5-580M (PGA988)  ? 
Intel Core i5-2430M (PGA)  ? 

Memory-intensive program performance

Part number   Result
AMD A8-6500B  ? 
Intel Core i5-2410M (PGA)  ? 
AMD Athlon X4 750K  ? 
AMD A10-5700  ? 
AMD Phenom II X4 945 (95W, rev. C2)  ? 
AMD Phenom II X4 840T  ? 
AMD Phenom II X4 945 (125W)  ? 
AMD Phenom II X4 B95  ? 
AMD Phenom II X6 1035T  ? 
AMD Phenom II X4 925 (rev. C2)  ? 
AMD Phenom II X3 B75  ? 

CPU ID information for the Phenom II X4 840T

Our CPUID database contains 2 records for this microprocessor. See all submitted records.

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 Phenom II X4 840T CPU.

CPU Family:Phenom II X4
Model Number:840T
Frequency:800 MHz
Part number:
Stepping Code:
Submitted by:
General information
Processor name (BIOS):AMD Phenom(tm) II X4 840T Processor
Processor name (CWID):Phenom II(tm) X4 840T
Logical processors:4
Processor type:Original OEM Processor
Core stepping:PH-E0
CPUID signature:100FA0
Family:16 (010h)
Model:10 (0Ah)
Stepping: 0 (00h)

Cache: L1 data L1 instruction L2 L3
Size: 4 x 64 KB 4 x 64 KB 4 x 512 KB 6 MB
Associativity: 2-way set
2-way set
16-way set
48-way set
Line size: 64 bytes 64 bytes 64 bytes 64 bytes
Lines per tag: 1 1 1 1
Instruction set extensionsAdditional instructions
MMX Advanced Bit manipulation
AMD extensions to MMX CLFLUSH
Extensions to 3DNow! CMPXCHG16B
  SKINIT/STGI support
Major featuresOther features
On-chip Floating Point Unit 1 GB large page support
64-bit / Intel 64 100MHz multiplier control
NX bit/XD-bit 128-bit SSE instructions
Secure Virtual Machine (Virtualization) 36-bit page-size extensions
Turbo Core Advanced programmable interrupt controller
PowerNow! / Cool'n'Quiet Core multi-processing legacy mode
  Debugging extensions
  Extended APIC space
  FXSAVE/FXRSTOR optimizations
  Hardware P-state control
  Hardware thermal control
  Instruction based sampling
  LAHF/SAHF support in 64-bit mode
  LBR virtualization
  LOCK MOV CR0 means MOV CR8
  Machine check architecture
  Machine check exception
  Memory-type range registers
  Misaligned SSE mode
  Model-specific registers
  Nested page tables
  OS visible workaround
  Page attribute table
  Page global extension
  Page-size extensions (4MB pages)
  Physical address extensions
  SVM lock
  Software thermal control
  Support for NRIP save
  TSC rate is ensured to be invariant across all states
  Temperature sensor
  Time stamp counter
  Virtual 8086-mode enhancements
  Watchdog timer support

CPUs, related to AMD Phenom II X4 840T

Model Cores /
Frequency Turbo
TDP Features Price  
AMD Phenom II X4 family, Socket AM2+ / Socket AM3
   Phenom II X4 840T4 / 42.9 GHz3.2 GHz2 MB6 MB95WTBT  
   Phenom II X4 955 (125W, rev. C3)4 / 43.2 GHz 2 MB6 MB125WTBT >
   Phenom II X4 955 (95W, rev. C3, non-BE)4 / 43.2 GHz 2 MB6 MB95WTBT >
   Phenom II X4 B974 / 43.2 GHz 2 MB6 MB95WTBT >
   Phenom II X4 955 (125W, rev. C2, BE)4 / 43.2 GHz 2 MB6 MB125WTBT, Unlock >
   Phenom II X4 955 (125W, rev. C3, BE)4 / 43.2 GHz 2 MB6 MB125WTBT, Unlock >
   Phenom II X4 960T4 / 43 GHz3.4 GHz2 MB6 MB95WTBT, Unlock >
   Phenom II X4 B994 / 43.3 GHz 2 MB6 MB95WTBT >
   Phenom II X4 965 (125W, non-BE)4 / 43.4 GHz 2 MB6 MB125WTBT >
   Phenom II X4 965 (140W, BE)4 / 43.4 GHz 2 MB6 MB140WTBT, Unlock$81>
   Phenom II X4 965 (125W, BE)4 / 43.4 GHz 2 MB6 MB125WTBT, Unlock >
   Phenom II X4 970 (rev. C3)4 / 43.5 GHz 2 MB6 MB125WTBT, Unlock$142>
   Phenom II X4 970 (rev. E0)4 / 43.5 GHz 2 MB6 MB125WTBT, Unlock >
   Phenom II X4 9754 / 43.6 GHz 2 MB6 MB125WTBT, Unlock$153>
   Phenom II X4 9804 / 43.7 GHz 2 MB6 MB125WTBT, Unlock$163>
AMD Phenom II X4 family, K10 micro-architecture, Other sockets
   Phenom II X4 9204 / 42.8 GHz 2 MB6 MB140.8WTBT >
   Phenom II X4 9404 / 43 GHz 2 MB6 MB139.6WTBT, Unlock >
Other families, K10 micro-architecture, Socket AM2+ / Socket AM3
   Athlon II 170u1 / 12 GHz 1 MB 20WTBT >
   Athlon X2 5200+ (0.045 micron)2 / 22.3 GHz 1 MB 65WTBT >
   Sempron X2 1902 / 22.5 GHz 1 MB 45WTBT >
   Athlon II X2 2802 / 23.6 GHz 2 MB 65WTBT$49>
   Phenom II X2 570 BE2 / 23.5 GHz 1 MB6 MB80WTBT, Unlock >
   Phenom II X3 B773 / 33.2 GHz 1.5 MB6 MB95WTBT >
   Athlon II X3 4603 / 33.4 GHz 1.5 MB 95WTBT$69>
 • 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 Phenom II X4 840T
 • Click on the >  icon to compare any CPU in the table with the AMD Phenom II X4 840T (Javascript required).
 • The 'Price' column shows official AMD prices as of Apr 9, 2014. Prices for obsolete and tray-only processors are not provided.
 • List of related CPUs is not complete.
 • Features abbreviations:
TBT - Dynamic Acceleration / Turbo Boost
Unlock - Unlocked multiplier

Pictures (4)

2011-02-01 11:55:31
Posted by: gshv

Bottom view
Phenom II X4 840T CPU pictures
2011-02-01 11:57:41
Posted by: gshv

Top view. Processor's stepping code is ACBBE CB. The CPU was manufactured at the end of March 2010.
Phenom II X4 840T CPU pictures
2011-08-17 18:32:12
Posted by: gshv

CPU-z screenshot of AMD 840T processor
2012-06-25 00:01:33
Posted by: Gary Lefever

Phenom II X4 840T Zosma core part number HD840TWFK4DGR
Comments (5)

You're welcome to post suggestions, corrections, your own personal AMD Phenom II X4 840T review, or your experience with the microprocessor. Please do not ask upgrade and troubleshooting questions, and do not start discussions.

Turbo core for 840T ?

2010-10-20 20:07:32
Posted by: qt-babe

Heard that 840T got Turbo Core function also, might want to add it in as well =)

L3 cache

2011-03-02 17:56:55
Posted by: Reader

according to AMD the 840T has no L3 cache.

Response: Phenom II 840T (notice the "T" suffix) is different from Phenom II 840, and it does have L3 cache.


2011-04-23 05:32:28
Posted by: Bryst

Successfully unlocking 5th core.


2012-03-11 00:28:34
Posted by: marpet

also x4 840t unlocks to a 6 core and the cpuid is 1405t x6

much better than 925 & 955

2012-09-01 02:16:13
Posted by: marpy

got mine to overclock to 4.3 @ 1.45v and unlocked to 6 core at 1.47v. Much cheaper than all other Zosma cores (except for the 650t but i can never find them anywhere). Most of them however do not unlock successfully i have had 10 and only 1 of them unlock completely.

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