AMD Phenom II X2 521

Benchmarks for the AMD Phenom II X2 521 can be found below. Release dates, price and performance comparisons are also listed when available. This is made using thousands of PerformanceTest benchmark results and is updated daily.

The first graph shows the relative performance of the CPU compared to the 10 other common (single) CPUs in terms of PassMark CPU Mark.
The 2nd graph shows the value for money, in terms of the CPUMark per dollar.
The pricing history data shows the price for a single Processor. For multiple Processors, multiply the price shown by the number of CPUs.

Is the AMD Phenom II X2 521 Good for Gaming?

This is a fairly old CPU that is no longer competitive with newer CPUs. [More ...]

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AMD Phenom II X2 521

Description:

Class: Desktop

Socket: AM2+/AM3

Clockspeed: 3.5 GHz

Cores: 2 Threads: 2

Typical TDP: 65 W

Cache per CPU Package:
L1 Instruction Cache: 2 x 64 KB
L1 Data Cache: 2 x 64 KB
L2 Cache: 2 x 1024 KB

Other names: AMD Phenom(tm) II X2 521 Processor

CPU First Seen on Charts: Q2 2011

CPUmark/$Price: NA

Overall Rank:
3685th fastest in multithreading out of 5150 CPUs
2615th fastest in single threading out of 5150 CPUs
1111th fastest in out of 1449 Desktop CPUs

Last Price Change: NA

Average CPU Mark rating

Multithread Rating

1374

Single Thread Rating

1409

^%
Samples: 40*
*Margin for error: Low

PerformanceTest V9
CPU Mark: 2,055
Thread: 1,141

^%Single thread rating may be higher than the overall rating, thread performance is just one component of the CPU Mark.

CPU Test Suite Average Results for AMD Phenom II X2 521

Integer Math	4,263 MOps/Sec
Floating Point Math	3,085 MOps/Sec
Find Prime Numbers	6 Million Primes/Sec
Random String Sorting	3,975 Thousand Strings/Sec
Data Encryption	389.6 MBytes/Sec
Data Compression	31,574 KBytes/Sec
Physics	116 Frames/Sec
Extended Instructions	693 Million Matrices/Sec
Single Thread	1,409 MOps/Sec

From submitted results to PerformanceTest V10 as of 17th of June 2025.

CPU Mark Distribution for AMD Phenom II X2 521

Submitted Baseline Distribution Graph as of 10th of June 2025

Not Enough Data from Current Version of PerformanceTest to Create Distribution Graph.

From submitted results since PerformanceTest V10 as of 10th of June 2025.

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CPU Mark Relative to Top 10 Common Desktop CPUs
As of 17th of June 2025 - Higher results represent better performance
Processor	Average CPU Mark
Intel Core i9-13900K		58,660
Intel Core i9-12900K		41,299
AMD Ryzen 9 5900X		39,018
Apple M1 Max 10 Core 3200 MHz		22,151
AMD Ryzen 5 5600X		21,861
Intel Core i5-12400F		19,484
Intel Core i9-9900K @ 3.60GHz		18,165
AMD Ryzen 5 3600		17,705
Apple M2 8 Core 3500 MHz		15,650
Apple M1 8 Core 3200 MHz		14,145
AMD Phenom II X2 521		1,374

CPU Value (CPU Mark / $Price )
As of 17th of June 2025 - Higher results represent better value
Processor	CPU Mark / $Price
AMD Ryzen 5 3600		227.01
Intel Core i5-12400F		186.45
AMD Ryzen 5 5600X		168.81
AMD Ryzen 9 5900X		156.70
Intel Core i9-12900K		136.18
Intel Core i9-13900K		129.68
Intel Core i9-9900K @ 3.60GHz		50.46
AMD Phenom II X2 521		NA
Apple M1 8 Core 3200 MHz		NA
Apple M2 8 Core 3500 MHz		NA
Apple M1 Max 10 Core 3200 MHz		NA

Single Thread Rating
As of 17th of June 2025 - Higher results represent better performance
Processor	Average Thread Rating
Intel Core i9-13900K		4,610
Intel Core i9-12900K		4,138
Apple M2 8 Core 3500 MHz		3,900
Apple M1 Max 10 Core 3200 MHz		3,837
Apple M1 8 Core 3200 MHz		3,680
Intel Core i5-12400F		3,477
AMD Ryzen 9 5900X		3,469
AMD Ryzen 5 5600X		3,364
Intel Core i9-9900K @ 3.60GHz		2,921
AMD Ryzen 5 3600		2,563
AMD Phenom II X2 521		1,409

Last 3 Baselines for AMD Phenom II X2 521
Most recent listed first
Baseline	CPU Mark
BL1961703 - Dec 03 2023		1472
BL1679036 - Nov 25 2022		1466
BL1379739 - Mar 08 2021		1367

Additional baselines can be obtained using Windows version of PerformanceTest's Manage Baselines feature.

Popular comparisons for AMD Phenom II X2 521
As of 17th of June 2025 - Higher results represent better performance
Processor	Average CPU Mark
AMD Phenom II X2 521		1,374
Intel Pentium G620 @ 2.60GHz vs AMD Phenom II X2 521		1,226 (-10.8%)
Intel Pentium G860 @ 3.00GHz vs AMD Phenom II X2 521		1,491 (+8.5%)
Intel Pentium G850 @ 2.90GHz vs AMD Phenom II X2 521		1,479 (+7.6%)
Intel Pentium G630 @ 2.70GHz vs AMD Phenom II X2 521		1,352 (-1.6%)
AMD Athlon II X2 270 vs AMD Phenom II X2 521		1,325 (-3.6%)
Intel Pentium G840 @ 2.80GHz vs AMD Phenom II X2 521		1,321 (-3.9%)
Intel Celeron G540 @ 2.50GHz vs AMD Phenom II X2 521		1,163 (-15.3%)
Intel Celeron G530 @ 2.40GHz vs AMD Phenom II X2 521		1,136 (-17.3%)
AMD A4-3400 APU vs AMD Phenom II X2 521		1,089 (-20.7%)
Intel Pentium E5700 @ 3.00GHz vs AMD Phenom II X2 521		1,088 (-20.8%)
Intel Pentium G2020 @ 2.90GHz vs AMD Phenom II X2 521		1,699 (+23.6%)
AMD Phenom II X2 565 vs AMD Phenom II X2 521		1,442 (+4.9%)

Is the AMD Phenom II X2 521 Good for Gaming?
As of 17th of June 2025 - Higher results represent better performance
Processor	Relative Gaming Score
AMD Ryzen 9 9900X3D		12,483
AMD Ryzen 7 9800X3D		12,152
AMD Ryzen 9 9950X3D		11,302
AMD Ryzen 9 7900X3D		10,842
Intel Core Ultra 9 285K		10,587
AMD Ryzen 5 7600X3D		10,485
AMD Ryzen 7 7800X3D		10,277
AMD Ryzen 9 7950X3D		9,805
AMD Ryzen 9 9955HX3D		9,768
Intel Core Ultra 5 245K		9,656
Intel Core Ultra 7 265K		9,521
Intel Core Ultra 9 285		9,493
AMD Phenom II X2 521		298

CPU Benchmarks

CPU Benchmarks

AMD Phenom II X2 521

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CPU Test Suite Average Results for AMD Phenom II X2 521

CPU Mark Distribution for AMD Phenom II X2 521