Phenom II X4 820

Details and Benchmarks for AMD Phenom II X4 820

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Benchmark Results

Combined benchmark scores based on multiple data points, giving a quick overview of this processor's performance.

Overall Score

Overall score for Phenom II X4 820 based on all benchmark results gathered. Look at this like a meta score, you will find more specific workload ratings below.

4,220 Rank: 1643
Rank Name Score Visual
1639 Core 2 Quad Q8400 4,223
+0.1%
1640 Core 2 Duo T9300 4,222
+0%
1641 Pentium G6950 4,221
+0%
1642 Core 2 Duo P9500 4,221
+0%
1643 Phenom II X4 820 4,220
1644 Phenom II X4 920 4,218
+-0%
1645 Core 2 Duo E7300 4,218
+-0%
1646 Core 2 Duo P9600 4,218
+-0%
1647 A6-9200 4,218
+-0%
1648 Core i5-450M 4,218
+-0%

View full ranking →

Multicore Score

Multicore performance score for Phenom II X4 820 based on multi-threaded benchmark results.

4,413 Rank: 1429
Rank Name Score Visual
1425 A10-5700 4,414
+0%
1426 A8 PRO-7600B 4,414
+0%
1427 Core m3-6Y30 4,413
+0%
1428 A8-7500 4,413
+0%
1429 Phenom II X4 820 4,413
1430 Core i3-7100U 4,411
+-0%
1431 Xeon E5450 4,410
-0.1%
1432 A8-3850 4,410
-0.1%
1433 A8-3530MX 4,410
-0.1%
1434 Phenom II N930 4,410
-0.1%

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Singlecore Score

Single-core performance score for Phenom II X4 820 based on single-threaded benchmark results.

4,092 Rank: 1684
Rank Name Score Visual
1680 Core 2 Duo E6850 4,102
+0.2%
1681 Celeron E3400 4,101
+0.2%
1682 Celeron E3300 4,095
+0.1%
1683 Pentium B950 4,092
+0%
1684 Phenom II X4 820 4,092
1685 Phenom II X4 910e 4,090
+-0%
1686 Core i5-430M 4,090
+-0%
1687 Core 2 Duo E8400 4,089
-0.1%
1688 Phenom II P960 4,086
-0.1%
1689 Phenom II P940 4,086
-0.1%

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Workload Scores

Performance scores grouped by workload type, normalized and aggregated from multiple raw benchmark results.

Number Crunching

Aggregated score for Phenom II X4 820 based on integer math, floating point math, and prime number computation benchmarks.

4,525 Rank: 1349
Rank Name Score Visual
1345 Phenom II X4 830 4,525
+0%
1346 Core i5-3427U 4,525
+0%
1347 A8-3820 4,525
+0%
1348 Phenom II X4 900e 4,525
+0%
1349 Phenom II X4 820 4,525
1350 Athlon II X4 645 4,524
+-0%
1351 Pentium 5405U 4,524
+-0%
1352 Pentium 4417U 4,524
+-0%
1353 Pentium 4415U 4,524
+-0%
1354 Core i3-3120M 4,524
+-0%

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Data Processing

Aggregated score for Phenom II X4 820 based on data encryption, data compression, and string sorting benchmarks.

4,522 Rank: 1203
Rank Name Score Visual
1199 Core i5-6360U 4,522
+0%
1200 Core i5-6300U 4,522
+0%
1201 Core i5-4300M 4,522
+0%
1202 Core i5-750 4,522
+0%
1203 Phenom II X4 820 4,522
1204 Pentium N6415 4,522
+0%
1205 Core i3-6100TE 4,521
+-0%
1206 Core i3-3220 4,521
+-0%
1207 Phenom II X4 910e 4,521
+-0%
1208 Core i5-670 4,521
+-0%

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Physics & Compute

Aggregated score for Phenom II X4 820 based on physics simulation and extended instruction set (SSE/AVX) benchmarks.

4,502 Rank: 1397
Rank Name Score Visual
1393 Athlon II X4 635 4,502
+0%
1394 A10-5750M 4,502
+0%
1395 A8-7200P 4,502
+0%
1396 A10-5757M 4,502
+0%
1397 Phenom II X4 820 4,502
1398 Core i5-4210Y 4,501
+-0%
1399 Core i5-4202Y 4,501
+-0%
1400 Pentium G3220T 4,501
+-0%
1401 Core i3-550 4,501
+-0%
1402 Core i3-2312M 4,500
+-0%

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Phenom II X4 820 Details

As of March 2026, the AMD Phenom II X4 820 remains a relic of the late 2000s, having been released in September 2009. While it once represented a strong mid-to-high-end desktop offering, its performance today places it far behind modern processors. With an overall score of 4220, the Phenom II X4 820 ranks #1643 out of 2060 processors in the benchmark database, highlighting its obsolescence in the current market. It sits just ahead of the Core i5-450M and the Core 2 Duo P9600, both of which are also long out of production, but trails significantly behind even budget-oriented modern CPUs like the A6-9200 and Core i3-7100U.

The processor is built on AMD's Deneb microarchitecture, fabricated on a 45 nm process by GlobalFoundries, and features four cores operating at a base frequency of 2.8 GHz. It includes 4 MB of L3 cache, 0.488 MiB of L2 cache, and 0.122 MiB of L1 cache, with support for dual-channel DDR3 memory at up to 1333 MT/s. The chip operates at a TDP of 95 W, which was considered high for its time and requires robust cooling solutions, especially under sustained loads. It uses the Socket AM3 interface and supports ECC memory, a feature beneficial in server and workstation environments, although the CPU itself is not marketed for such use.

Despite lacking integrated graphics, the Phenom II X4 820 can support graphics functionality through certain chipsets that include onboard GPU capabilities. It supports a range of technologies including SSE2, SSE3, SSE4a, and AMD-V for hardware virtualization, along with 3DNow! and Advanced Bit Manipulation instructions. However, it does not support simultaneous multithreading, meaning each core handles only one thread, limiting its efficiency in multithreaded applications.

In single-core performance, the Phenom II X4 820 scores 4092, placing it #1683 in the rankings. This indicates that while it was competitive for its era, it falls behind modern processors that benefit from architectural advancements and higher clock speeds. Its multicore score of 4413 ranks it #1427, showing that its four-core design still provides some advantage in multithreaded workloads compared to many older dual-core CPUs, though it is outpaced by contemporary quad- and hexa-core processors.

When compared to the top-tier processors of 2026, such as the Ryzen Threadripper PRO 9995WX with a score over 9,000, the Phenom II X4 820 appears as a historical artifact. It may still find niche use in legacy systems, retro builds, or educational environments where understanding older hardware is valuable. However, for any modern computing task—whether productivity, gaming, or content creation—it is no longer competitive and should be considered obsolete.
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AMD Phenom II X4 820

Main Specifications

Designer: AMD
Name: Phenom II X4 820
Cores: 4
Threads: 4
Base Frequency: 2800 MHz
Clock Multiplier: 14x (locked)
Core Name: Deneb
Socket: Socket AM3
Package: µPGA
Target Segment: Desktop
TDP: 95 W

Cache Specifications

L1 Cache: 124.928 KiB
L2 Cache: 0.488 MiB
L3 Cache: 3.815 MiB

Memory Specifications

Supported Memory Type: DDR3

Physical Specifications

Process: 45 nm
Die Area: 258 mm²
Transistor Count: 0.00 billion
Manufacturer: GlobalFoundries

CPU Features

MMX SSE SSE2 SSE3 ABM SSE4a AMD-V 3DNow!
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