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AMD logo Athlon II X4 645
versus
AMD logo Phenom II X4 820

AMD Athlon II X4 645 logo AMD Phenom II X4 820 logo
General information Athlon II X4 645 Phenom II X4 820
Launched Q4 2010 Q4 2009
Used in Desktop Desktop
Factory AMD AMD
Socket AM3 AM3
Series Name AMD Athlon II X4 AMD Phenom II X4
Core Family Name Propus Deneb
Clock 3.1 GHz 0 % 2.8 GHz 9.7 %
Cores 4 0 % 4 0 %
Threads 4 0 % 4 0 %
Thermal Design Power (TDP) 95 W 0 % 95 W 0 %
Lithography 45 nm 0 % 45 nm 0 %
L1 Cache 4 × 64 kB Instruction
4 × 64 kB Data
4 × 64 kB Instruction
4 × 64 kB Data
L2 Cache 4 × 512 kB
4 × 512 kB
ECC Supported No No
Multithreading Supported No No
Performance Athlon II X4 645 Phenom II X4 820
Overall Score 35160 0 % 34161 2.8 %
Future Proof 21 % 0 % 15 % 28.6 %
Benchmark Score 1528 0 % 1362 10.9 %
Single Thread Score 1268.1 0 % 1115.6 12 %
Encrypting Data 3244.7 MB/s 0 % 2911.7 MB/s 10.3 %
Compressing Data 52.3 MB/s 0 % 45.4 MB/s 13.1 %
String objects sorting 6687.9 thousand/s 0 % 5911.1 thousand/s 11.6 %
Prime numbers generation 9 millions/s 18.2 % 11 millions/s 0 %
Mathemathic operations (integer) 7231.8 millions/s 0 % 6475 millions/s 10.5 %
Mathemathic operations (float) 5155.7 millions/s 0 % 4670.5 millions/s 9.4 %

Comparison of average FPS

Comparison of average FPS count by settings on resolution 1920 × 1080 (FHD (1080p)) for Athlon II X4 645, Phenom II X4 820.

Average frames per second Athlon II X4 645 Phenom II X4 820
Screen resolution: 1920 × 1080 pixels   Change
Ultra settings 58.9 FPS 55.9 FPS
High settings 94.2 FPS 89.5 FPS
Medium settings 117.7 FPS 111.8 FPS
Low settings 147.2 FPS 139.8 FPS
Difference 0 % 5 %

Grand Theft Auto V Frames per second

Comparison of FPS count by settings on resolution 1920 × 1080 (FHD (1080p)) in game 1920 × 1080 (FHD (1080p)) for Grand Theft Auto V.

Grand Theft Auto V Athlon II X4 645 Phenom II X4 820
Screen resolution: 1920 × 1080 pixels   Change
Ultra settings 112.2 FPS 110.5 FPS
High settings 179.5 FPS 176.7 FPS
Medium settings 224.4 FPS 220.9 FPS
Low settings 280.5 FPS 276.1 FPS
Difference 0 % 1.6 %
Configuration Settings
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Screen resolution Screen resolution image
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