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AMD Phenom II X2 521 - HDX521OCK23GM

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AMD Phenom II X2 521 specifications

General information
TypeCPU / Microprocessor
Market segmentDesktop
FamilyAMD Phenom II X2
Model number  ? 521
CPU part number
  • HDX521OCK23GM is an OEM/tray microprocessor
Stepping codeWAEKC AE
Frequency  ? 3500 MHz
Bus speed  ? 667 MHz Memory controller
One 2000 MHz 16-bit HyperTransport link
Clock multiplier  ? 17.5
Package938-pin organic micro-PGA
SocketsSocket AM2+
Socket AM3
Weight1.4oz / 39.1g
Introduction date2nd quarter 2011
Architecture / Microarchitecture
Processor core  ? Regor
Core stepping  ? DA-C3
Manufacturing process0.045 micron SOI
Die size258mm2
Data width64 bit
The number of cores2
The number of threads2
Floating Point UnitIntegrated
Level 1 cache size  ? 2 x 64 KB instruction caches
2 x 64 KB data caches
Level 2 cache size  ? 2 x 1 MB caches
Level 3 cache sizeNone
  • 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  ? 
Low power features
  • Cool'n'Quiet 3.0
  • CoolCore Technology  ? 
  • Dual Dynamic Power Management  ? 
  • Core C1 and C1E states
  • Package S0, S1, S3, S4 and S5 states
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 technology
Electrical / Thermal parameters
Thermal Design Power  ? 65 Watt

Detailed side-by-side comparison

For detailed comparision of the AMD Phenom II X2 521 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: HDX521OCK23GM, AMD Phenom II X2 3.5GHz, Regor Socket AM2+, Socket AM3


Q: I have an AMD Phenom II X2 521 microprocessor. Is it possible to upgrade it?
A: Probably yes. CPU compatibility is determined by your motherboard. Please check website for CPU support list for your board.

Phenom II X2 521 Overclocking

Sorry, overclocking information is not available at this time.

Related news stories

AMD Phenom II X2 521: yet another re-branded Athlon II CPU
Jun 17, 2011: In January, AMD released two Phenom II microprocessors, that were in fact top of the line Athlon II models, re-branded as Phenoms. One of them, Phenom II 840, was announced at the beginning of January, and that CPU had exactly the same specifications as never released quad-core Athlon II 650. Another Phenom II part, OEM-only dual-core 511, was sighted in HP Pavilion Slimline s5700 desktop PC. The specs of this processor were identical to Athlon II X2 270, that was not launched at that time. In the past couple of weeks, we acquired new Phenom II chip with part number HDX521OCK23GM. In the meantime, our site visitor "dnlbntl" discovered new Phenom II 521 model in HP Pavilion p7z desktop desktop PC, and commented on it on our Athlon II 275 CPU page.

Compare AMD Phenom II X2 521 benchmark results with all tested CPUs from one of the following families:

To compare this Phenom II X2 CPU with any tested processor please proceed to

For additional benchmarks, comparing multi-threaded performance of this microprocessor with other Phenom II X2 CPUs and the fastest AMD and Intel x86 chips, please visit AMD Phenom II X2 521 benchmarks page.

AMD Phenom II X2 521 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 Phenom II X2 521 compares to other CPUs in specific benchmarks or in aggregate milti-threading performance please see benchmark tools section on the right.

Benchmarked processor

CPU ID:100F63
CPU vendor string:AuthenticAMD
CPU name string:AMD Phenom(tm) II X2 521 Processor

Integer performance

Part number   Result
Intel Core i3-520  ? 
AMD Phenom II X3 705e  ? 
AMD Athlon II X3 415e  ? 
Intel Core i3-2100T  ? 
AMD Phenom II X3 700e  ? 
AMD Phenom II X2 521  ? 
AMD Athlon II X3 405e (rev. C2)  ? 
AMD Athlon II X3 405e (rev. C3)  ? 
AMD Athlon II X2 270  ? 
AMD Phenom II X2 511  ? 
AMD Athlon II X3 400e  ? 

Floating Point performance

Part number   Result
AMD Athlon II X3 420e  ? 
AMD Phenom II X3 710  ? 
AMD Athlon II X3 415e  ? 
AMD Phenom II X3 705e  ? 
AMD Phenom II X3 700e  ? 
AMD Phenom II X2 521  ? 
AMD Athlon II X3 405e (rev. C3)  ? 
AMD Athlon II X3 405e (rev. C2)  ? 
AMD Athlon II X2 270  ? 
AMD Phenom II X2 511  ? 
AMD Athlon II X3 400e  ? 

MMX / SSE / SSE2 performance

Part number   Result
AMD Athlon II X3 2.7 GHz ZD271117K3216  ? 
AMD Athlon II X3 425  ? 
AMD Phenom II X3 710  ? 
AMD Athlon II X3 2.6 GHz ZD260121K3216  ? 
AMD Athlon II X3 420e  ? 
AMD Phenom II X2 521  ? 
AMD Phenom II X3 705e  ? 
AMD Athlon II X3 415e  ? 
AMD Athlon II X2 270  ? 
AMD Phenom II X2 511  ? 
AMD Phenom II X3 700e  ? 

Memory-intensive program performance

Part number   Result
AMD Athlon II X3 460  ? 
AMD Athlon II X3 455  ? 
AMD Athlon II X4 630 (rev. C3)  ? 
AMD Athlon II X4 630 (rev. C2)  ? 
AMD Athlon II X3 450  ? 
AMD Phenom II X2 521  ? 
AMD Athlon II X3 445  ? 
AMD Athlon II X2 270  ? 
AMD Athlon II X3 440 (rev. C3)  ? 
AMD Athlon II X3 440 (rev. C2)  ? 
AMD Phenom II X2 511  ? 

CPU ID information for the Phenom II X2 521

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 X2 521 CPU.

CPU Family:Phenom II X2
Model Number:521
Frequency:3492 MHz
Part number:
Stepping Code:WAEKC AE 1102GPM
Submitted by:CPU-World
General information
Processor name (BIOS):AMD Phenom(tm) II X2 521 Processor
Logical processors:2
Processor type:Original OEM Processor
Core stepping:DA-C3
CPUID signature:100F63
Family:16 (010h)
Model: 6 (06h)
Stepping: 3 (03h)

Cache: L1 data L1 instruction L2
Size: 2 x 64 KB 2 x 64 KB 2 x 1 MB
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
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
PowerNow! / Cool'n'Quiet Advanced programmable interrupt controller
  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 X2 521

Model Cores /
Frequency L2
TDP Features Price  
AMD Phenom II X2 family, Socket AM2+ / Socket AM3
   Phenom II X2 B532 / 22.8 GHz1 MB6 MB80W >
   Phenom II X2 545 (rev. C2)2 / 23 GHz1 MB6 MB94.3W >
   Phenom II X2 545 (rev. C3)2 / 23 GHz1 MB6 MB80W >
   Phenom II X2 B552 / 23 GHz1 MB6 MB80W >
   Phenom II X2 550 (rev. C3)2 / 23.1 GHz1 MB6 MB80W >
   Phenom II X2 550 BE (rev. C2)2 / 23.1 GHz1 MB6 MB94WUnlock >
   Phenom II X2 B572 / 23.2 GHz1 MB6 MB80W >
   Phenom II X2 555 BE (rev. C3)2 / 23.2 GHz1 MB6 MB80WUnlock$84>
   Phenom II X2 5112 / 23.4 GHz2 MB 65W >
   Phenom II X2 560 BE2 / 23.3 GHz1 MB6 MB80WUnlock$89>
   Phenom II X2 5212 / 23.5 GHz2 MB 65W  
   Phenom II X2 B592 / 23.4 GHz1 MB6 MB80W >
   Phenom II X2 565 BE2 / 23.4 GHz1 MB6 MB80WUnlock$101>
   Phenom II X2 B602 / 23.5 GHz1 MB6 MB80W >
   Phenom II X2 570 BE2 / 23.5 GHz1 MB6 MB80WUnlock >
Other families, K10 micro-architecture, Socket AM2+ / Socket AM3
   Athlon II 170u1 / 12 GHz1 MB 20W >
   Sempron 1501 / 12.9 GHz1 MB 45W >
   Athlon X2 5200+ (0.045 micron)2 / 22.3 GHz1 MB 65W >
   Sempron X2 1902 / 22.5 GHz1 MB 45W >
   Athlon II X2 2802 / 23.6 GHz2 MB 65W$49>
   Phenom II X3 B773 / 33.2 GHz1.5 MB6 MB95W >
   Athlon II X3 4603 / 33.4 GHz1.5 MB 95W$69>
   Athlon II X4 6504 / 43.2 GHz2 MB 95W >
   Phenom II X4 9804 / 43.7 GHz2 MB6 MB125WUnlock$163>
 • 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 X2 521
 • Click on the >  icon to compare any CPU in the table with the AMD Phenom II X2 521 (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:
Unlock - Unlocked multiplier

Pictures (3)

2011-07-12 13:43:19
Posted by: gshv

CPU-Z screenshot
2011-09-03 15:31:53
Posted by: gshv

Bottom view
Phenom II X2 521 CPU pictures
2011-09-03 15:33:05
Posted by: gshv

Top view. Stepping code is WAEKC AE. The processor was manufactured in the first half of January 2011.
Phenom II X2 521 CPU pictures
Comments (0)

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