Phenom II X4 955

Details and Benchmarks for AMD Phenom II X4 955

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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 955 based on all benchmark results gathered. Look at this like a meta score, you will find more specific workload ratings below.

4,411 Rank: 1384
Rank Name Score Visual
1380 Core i7-2640M 4,415
+0.1%
1381 Xeon E5530 4,413
+0%
1382 Core i7-2677M 4,412
+0%
1383 Core i5-2435M 4,412
+0%
1384 Phenom II X4 955 4,411
1385 Core i7-3689Y 4,411
+0%
1386 Core i7-2670QM 4,410
+-0%
1387 Core i5-661 4,409
+-0%
1388 Pentium Silver N6000 4,409
+-0%
1389 Phenom II X4 B40 4,408
-0.1%

View full ranking →

Multicore Score

Multicore performance score for Phenom II X4 955 based on multi-threaded benchmark results.

4,374 Rank: 1521
Rank Name Score Visual
1517 Xeon E5472 4,375
+0%
1518 A10-9620P 4,375
+0%
1519 Celeron G1820T 4,375
+0%
1520 Phenom II X3 B75 4,375
+0%
1521 Phenom II X4 955 4,374
1522 Celeron G530 4,374
+0%
1523 A9-9400 4,374
+0%
1524 Core i5-4200Y 4,374
+0%
1525 Celeron J3455 4,373
+-0%
1526 Pentium G3220 4,373
+-0%

View full ranking →

Singlecore Score

Single-core performance score for Phenom II X4 955 based on single-threaded benchmark results.

4,435 Rank: 1352
Rank Name Score Visual
1348 A10-7860K 4,439
+0.1%
1349 Pentium 4415U 4,439
+0.1%
1350 Core i7-2677M 4,435
+0%
1351 Xeon X3440 4,435
+0%
1352 Phenom II X4 955 4,435
1353 Athlon X4 860K 4,435
+0%
1354 Intel Core i7-640M 4,433
+-0%
1355 A10-7800 4,432
-0.1%
1356 A8-5600K 4,432
-0.1%
1357 Core i7-2670QM 4,431
-0.1%

View full ranking →

Workload Scores

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

Number Crunching

Aggregated score for Phenom II X4 955 based on integer math, floating point math, and prime number computation benchmarks.

4,541 Rank: 1222
Rank Name Score Visual
1218 Core i3-6100TE 4,541
+0%
1219 Core i3-7130U 4,541
+0%
1220 Core i5-5257U 4,541
+0%
1221 Pentium G3420 4,541
+0%
1222 Phenom II X4 955 4,541
1223 FX-9800P 4,541
+0%
1224 Xeon E3-1220L v2 4,541
+0%
1225 Celeron G5900 4,541
+0%
1226 Athlon Silver 3050U 4,541
+0%
1227 Core i5-6200U 4,540
+-0%

View full ranking →

Data Processing

Aggregated score for Phenom II X4 955 based on data encryption, data compression, and string sorting benchmarks.

4,543 Rank: 1087
Rank Name Score Visual
1083 Core i3-4340 4,543
+0%
1084 A10-6790K 4,543
+0%
1085 A8-7670K 4,543
+0%
1086 Athlon II X4 555 4,543
+0%
1087 Phenom II X4 955 4,543
1088 Xeon X5460 4,543
+0%
1089 Athlon X4 840 4,543
+0%
1090 Pentium Gold G5420T 4,542
+-0%
1091 Core i5-7267U 4,542
+-0%
1092 Core i3-8145U 4,542
+-0%

View full ranking →

Physics & Compute

Aggregated score for Phenom II X4 955 based on physics simulation and extended instruction set (SSE/AVX) benchmarks.

4,516 Rank: 1291
Rank Name Score Visual
1287 Core i3-4030U 4,517
+0%
1288 Pentium Silver J5040 4,517
+0%
1289 Core i7-2637M 4,516
+0%
1290 Athlon II X4 555 4,516
+0%
1291 Phenom II X4 955 4,516
1292 Xeon E5430 4,516
+0%
1293 Core M-5Y51 4,516
+0%
1294 A8-5500B 4,516
+0%
1295 Core i7-2677M 4,515
+-0%
1296 Pentium G3260 4,515
+-0%

View full ranking →

Phenom II X4 955 Details

The AMD Phenom II X4 955, launched in April 2009, represents a significant step in AMD's desktop processor lineup from the late 2000s, built on the Deneb microarchitecture and designed for Socket AM3. While long outdated by modern standards, it was once a high-performance quad-core option aimed at enthusiasts and power users seeking multi-threaded performance without the need for discrete graphics. As of March 2026, the processor is over 17 years old, placing it firmly in the category of legacy hardware, but its benchmark data still provides a useful historical perspective on CPU evolution.

The Phenom II X4 955 operates at a base frequency of 2.9 GHz, with a turbo frequency of 3.3 GHz, and features 4 cores with 2 threads, indicating it does not support simultaneous multithreading. It is manufactured on a 45 nm process node and contains 758 million transistors, with a die area of 258 mm². The processor is packaged in a µPGA form factor and uses a 5 GT/s bus speed, with a PCIe Gen 2 interface supporting up to 16 lanes. Its TDP is rated at 125 W, which was high for its time and necessitated robust cooling solutions.

Cache architecture includes 0.122 MiB of L1 cache, 0.488 MiB of L2 cache, and a substantial 5.722 MiB of L3 cache, a notable advantage over many contemporary processors. Memory support includes dual-channel DDR3-1333 with a maximum capacity of 32 GB and a bandwidth of 21.3 GB/s. The processor supports ECC memory, a feature typically reserved for server and workstation environments, highlighting its intended use in more demanding applications.

Despite lacking integrated graphics, the Phenom II X4 955 leverages chipset-level support for graphics on certain motherboards, particularly those with integrated GPU capabilities. It supports a wide range of instruction sets, including SSE, SSE2, SSE3, SSE4.1, SSE4.2, AVX2, AES-NI, and AMD-V, ensuring compatibility with a broad spectrum of software and virtualization tasks.

In benchmark testing, the Phenom II X4 955 achieves an overall score of 4411, placing it at #1384 among 2060 processors. Its single-core score of 4435 ranks it at #1350, while its multicore score of 4374 lands it at #1521. These results place it behind modern mainstream processors such as the Core i5-3210M and ahead of older models like the Pentium G3220. While the single-core performance is relatively competitive for its era, the multicore performance lags behind many modern mid-range CPUs.

In conclusion, the Phenom II X4 955 is best suited for legacy systems, retro computing, or educational use cases where understanding historical architecture is valuable. Its performance, while impressive in 2009, is now significantly outpaced by current-generation processors, particularly in single-threaded and power-efficient workloads. For modern desktop use, it is no longer a viable option, but it remains a notable example of AMD's efforts to deliver high-core-count CPUs during the early multi-core era.
Frequently Compared

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AMD Phenom II X4 955

Main Specifications

Designer: AMD
Name: Phenom II X4 955
Model Number: G1850
Cores: 2
Threads: 2
Base Frequency: 2900 MHz
Clock Multiplier: 16x (locked)
Core Name: Deneb
Socket: FCLGA1150
Package: µPGA
Target Segment: Desktop
Max CPUs: 1
TDP: 53 W

Cache Specifications

L1 Cache: 124.928 KiB
L2 Cache: 0.488 MiB
L3 Cache: 5.722 MiB

Memory Specifications

Supported Memory Type: DDR3-1333, DDR3L-1333 @ 1.5V
Memory Channels: 2
Maximum Memory: 0 GB
Maximum Bandwidth: 21.3 GB/s
ECC Support: Yes

PCI-Express Specifications

PCIe Revision: Up to 3.0
PCIe Lanes: 16
PCIe Configuration: Up to 1x16, 2x8, 1x8+2x4

Integrated Graphics

GPU: HD Graphics
GPU Designer: Intel
GPU Max Frequency: 1050 MHz

Physical Specifications

Process: 22 nm
Die Area: 258 mm²
Transistor Count: 0.00 billion
Word Size: 64-bit

CPU Features

MMX SSE SSE2 SSE3 SSE4.1 SSE4.2 AVX2 ABM AES x86-64 HT EIST TXT vPro VT-x VT-d EPT Secure Key SMEP SIPP IPT SSE4a AMD-V TSX Flex Memory FMA 3DNow!
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