AMD Athlon II X4 645 vs AMD Athlon X4 940

Table of Contents

Physical Specifications

Socket AMD Socket AM3 AMD Socket AM4
Process size 45 nm 28 nm
Transistors 300 million 1,178 million
Die size 169 mm² 246 mm²
Package µPGA µPGA
tCaseMax 74°C

Performance

Frequency 3.1 GHz 3.2 GHz
Turbo clock up to 3.6 GHz
Base clock 200 MHz 100 MHz
Multiplier 15.5x 32.0x
Multiplier unlocked No Yes
Voltage 1.4 V 1.475 V
TDP 95 W 65 W

Architecture Details

Vertical Segment Desktop Desktop
Production status End-of-life Active
Release date Sep 21st, 2010 Jul 27th, 2017
Codename Propus Bristol Ridge
Generation Athlon II X4 Athlon
Part ADX645WFK42GMADX645WFGMBOX AD940XAGM44AB
Memory support DDR3 Dual-channel DDR4 Dual-channel
ECC memory No No
PCI Express Gen 2

Cores

Total Cores 4 4
Total Threads 4 4
SMP # CPUs 1 1
Integrated graphics

Cache

Cache L1 128K (per core) 128K (per core)
Cache L2 512K (per core) 512K (per core)

Features & Technologies

3DNow! Yes Yes
AES Yes
AMD-V Yes Yes
AMD64 Yes Yes
AVX Yes
AVX2 Yes
BMI1 Yes
BMI2 Yes
EVP Yes
F16C Yes
FMA3 Yes
FMA4 Yes
MMX Yes Yes
NX bit Yes
SSE Yes Yes
SSE2 Yes Yes
SSE3 Yes Yes
SSE4 Yes
SSE4.1 Yes
SSE4.2 Yes
SSE4A Yes Yes
TBM Yes
Turbo Core Yes
XOP Yes

Notes

Notes This processor comes with an unlocked base clock multiplier, allowing users to set the multiplier value higher than shipped value, to facilitate better overclocking.

Compare

Sysrqmts browser extension icon
Stop overpaying for PC games!
See cheapest prices in Steam store with our browser extension.