AMD Athlon II X4 638 - AD638XOJZ43GX / AD638XOJGXBOX

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AMD Athlon II X4 638 specifications

General information
Type	CPU / Microprocessor
Market segment	Desktop
Family	AMD Athlon II X4
Model number ?	638
CPU part numbers	AD638XOJZ43GX is an OEM/tray microprocessor AD638XOJGXBOX is a boxed microprocessor
Frequency ?	2700 MHz
Package	905-pin lidded micro-PGA package
Socket	Socket FM1
Size	1.57" x 1.57" / 4cm x 4cm
Introduction date	February 2012

Architecture / Microarchitecture
Microarchitecture	K10
Platform	Lynx
Processor core ?	Llano
Core stepping ?	B0
CPUID	300F10
Manufacturing process	0.032 micron
Data width	64 bit
The number of cores	4
The number of threads	4
Floating Point Unit	Integrated
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 1 MB 16-way associative cache
Multiprocessing	Uniprocessor
Features	MMX instructions Extensions to MMX 3DNow! technology Extensions to 3DNow! SSE / Streaming SIMD Extensions SSE2 / Streaming SIMD Extensions 2 SSE3 / Streaming SIMD Extensions 3 SSE4a ? AMD64 / AMD 64-bit technology ? AMD-V / AMD Virtualization technology EVP / Enhanced Virus Protection ?
Low power features	PowerNow!

Integrated peripherals / components
Memory controller	The number of controllers: 1 Memory channels: 2 Supported memory: DDR3-1866
Other peripherals	PCI Express 2.0

Electrical / Thermal parameters
Maximum operating temperature ?	70.1°C
Thermal Design Power ?	65 Watt

CPUs, related to AMD Athlon II X4 638

Model Cores /
Threads Freq. L2
cache TDP Features Price

AMD Athlon II X4 family, Socket FM1

   Athlon II X4 631 4 / 4 2.6 GHz 4 MB 100 Watt $65

   Athlon II X4 631 (65W) 4 / 4 2.6 GHz 4 MB 65 Watt

   Athlon II X4 638 4 / 4 2.7 GHz 4 MB 65 Watt

   Athlon II X4 641 4 / 4 2.8 GHz 4 MB 100 Watt $65

   Athlon II X4 651 4 / 4 3 GHz 4 MB 100 Watt $76

   Athlon II X4 651K 4 / 4 3 GHz 4 MB 100 Watt Unlock

AMD Athlon II X4 family, K10 micro-architecture, Other sockets

   Athlon II X4 630 (rev. C2) 4 / 4 2.8 GHz 2 MB 95 Watt

   Athlon II X4 630 (rev. C3) 4 / 4 2.8 GHz 2 MB 95 Watt

   Athlon II X4 635 (rev. C2) 4 / 4 2.9 GHz 2 MB 95 Watt

   Athlon II X4 635 (rev. C3) 4 / 4 2.9 GHz 2 MB 95 Watt

   Athlon II X4 640 4 / 4 3 GHz 2 MB 95 Watt $67

   Athlon II X4 640 (rev. E0) 4 / 4 3 GHz 2 MB 95 Watt

   Athlon II X4 645 4 / 4 3.1 GHz 2 MB 95 Watt $77

   Athlon II X4 650 4 / 4 3.2 GHz 2 MB 95 Watt

Other families, K10 micro-architecture, Socket FM1

   E2-3200 2 / 2 2.4 GHz 1 MB 65 Watt

   Sempron X2 198 2 / 2 2.5 GHz 1 MB 65 Watt

   A4-3400 (HX) 2 / 2 2.7 GHz 1 MB 65 Watt $40

   A4-3400 2 / 2 2.7 GHz 1 MB 65 Watt $40

   A4-3420 2 / 2 2.8 GHz 1 MB 65 Watt

   Athlon II X2 221 2 / 2 2.8 GHz 1 MB 65 Watt

   A6-3650 4 / 4 2.6 GHz 4 MB 100 Watt $77

   A6-3670K 4 / 4 2.7 GHz 4 MB 100 Watt Unlock $77

   A8-3850 4 / 4 2.9 GHz 4 MB 100 Watt $87

   A8-3870K 4 / 4 3 GHz 4 MB 100 Watt Unlock $91

• Highlighted numbers and features indicate whether specific processor performs better or worse than Athlon II X4 638

• Within each category, the CPUs are sorted from slower (at the top) to faster (at the bottom)

• The 'Price' column shows official AMD prices as of Apr 29, 2013. Prices for obsolete and tray-only processors are not provided.

• List of related CPUs is not complete.

• Features abbreviations:

Unlock - Unlocked multiplier

FAQ

Q: Is it possible to upgrade my Athlon II X4 638 CPU?

A: Probably yes. Processor compatibility is determined by your motherboard. Please see CPU-Upgrade.com website for CPU support list for your board.

AMD Athlon II X4 638 Overclocking

Sorry, overclocking information is not available at this time.

Pictures (0)

News

AMD drops prices of Athlon II and A-Series processors

Nov 06, 2012: Last month DigiTimes reported on upcoming price reductions of older generation of AMD APUs. According to their sources, AMD was going to reduce prices of socket FM1 processors by as much as 35%. Yesterday AMD updated their official price list, and posted new prices of A-Series microprocessors, however the cuts were not as big as expected.

AMD quietly introduces two Athlon II X4 CPUs

Feb 08, 2012: With the launch of "Llano" microprocessors in the middle of last year, it seemed like AMD was going to retire their older Athlon II and Sempron brands, that are commonly associated with mid-class and budget K10-based processors. Despite of introduction of new "A-Series" and other "-Series" families, the company continued to use "Athlon II" and "Sempron" names for "Llano" products, that didn't have on-chip GPU. The first Athlon II branded Llano model for socket FM1, quad-core 631 with 2.6 GHz frequency, was launched last summer. It was followed by Athlon II 651 in November. Yesterday AMD added another two Athlon II CPUs to AMD product database.

CPU ID

CPUID Tools

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Last modified: 14 May 2013