EPYC 9755 vs Phenom II X2 B55

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Aggregate performance score

Phenom II X2 B55
2009
2 cores / 2 threads, 80 Watt
0.75
EPYC 9755
2024
128 cores / 256 threads, 500 Watt
23.21
+2995%

EPYC 9755 outperforms Phenom II X2 B55 by a whopping 2995% based on our aggregate benchmark results.

Primary details

Comparing processor market type (desktop or notebook), architecture, sales start time and price.

Place in the ranking2826267
Place by popularitynot in top-100not in top-100
Cost-effectiveness evaluation2.020.24
Market segmentDesktop processorServer
Power efficiency0.904.48
DesignerAMDAMD
ManufacturerGlobalFoundriesTSMC
Architecture codenameCallisto (2009−2010)Turin (2024)
Release date1 October 2009 (15 years ago)10 October 2024 (less than a year ago)
Launch price (MSRP)$48$12,984

Cost-effectiveness evaluation

Performance per price, higher is better.

Phenom II X2 B55 has 742% better value for money than EPYC 9755.

Performance to price scatter graph

Detailed specifications

Phenom II X2 B55 and EPYC 9755 basic parameters such as number of cores, number of threads, base frequency and turbo boost clock, lithography, cache size and multiplier lock state. These parameters indirectly say of CPU speed, though for more precise assessment you have to consider their test results.

Physical cores2 (Dual-core)128
Threads2256
Base clock speed3 GHz2.7 GHz
Boost clock speed3 GHz4.1 GHz
L1 cache128 KB (per core)80 KB (per core)
L2 cache512 KB (per core)1 MB (per core)
L3 cache6 MB (shared)512 MB (shared)
Chip lithography45 nm4 nm
Die size258 mm216x 70.6 mm2
Number of transistors758 million133,040 million
64 bit support++
Windows 11 compatibility-no data

Compatibility

Information on Phenom II X2 B55 and EPYC 9755 compatibility with other computer components: motherboard (look for socket type), power supply unit (look for power consumption) etc. Useful when planning a future computer configuration or upgrading an existing one. Note that power consumption of some processors can well exceed their nominal TDP, even without overclocking. Some can even double their declared thermals given that the motherboard allows to tune the CPU power parameters.

Number of CPUs in a configuration12
SocketAM3SP5
Power consumption (TDP)80 Watt500 Watt

Technologies and extensions

Technological solutions and additional instructions supported by Phenom II X2 B55 and EPYC 9755. You'll probably need this information if you require some particular technology.

AES-NI-+
AVX-+
Precision Boost 2no data+

Virtualization technologies

Virtual machine speed-up technologies supported by Phenom II X2 B55 and EPYC 9755 are enumerated here.

AMD-V++

Memory specs

Types, maximum amount and channel quantity of RAM supported by Phenom II X2 B55 and EPYC 9755. Depending on the motherboard, higher memory frequencies may be supported.

Supported memory typesDDR3DDR5

Graphics specifications

General parameters of integrated GPUs, if any.

Integrated graphics cardOn certain motherboards (Chipset feature)N/A

Peripherals

Specifications and connection of peripherals supported by Phenom II X2 B55 and EPYC 9755.

PCIe version2.05.0
PCI Express lanesno data128

Synthetic benchmark performance

Various benchmark results of the processors in comparison. Overall score is measured in points in 0-100 range, higher is better.


Combined synthetic benchmark score

This is our combined benchmark performance rating.

Phenom II X2 B55 0.75
EPYC 9755 23.21
+2995%

Passmark

Passmark CPU Mark is a widespread benchmark, consisting of 8 different types of workload, including integer and floating point math, extended instructions, compression, encryption and physics calculation. There is also one separate single-threaded scenario measuring single-core performance. Other than that, Passmark measures multi-core performance.

Phenom II X2 B55 1204
EPYC 9755 37319
+3000%

Gaming performance

Pros & cons summary


Performance score 0.75 23.21
Recency 1 October 2009 10 October 2024
Physical cores 2 128
Threads 2 256
Chip lithography 45 nm 4 nm
Power consumption (TDP) 80 Watt 500 Watt

Phenom II X2 B55 has 525% lower power consumption.

EPYC 9755, on the other hand, has a 2994.7% higher aggregate performance score, an age advantage of 15 years, 6300% more physical cores and 12700% more threads, and a 1025% more advanced lithography process.

The AMD EPYC 9755 is our recommended choice as it beats the AMD Phenom II X2 B55 in performance tests.

Note that Phenom II X2 B55 is a desktop processor while EPYC 9755 is a server/workstation one.

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AMD Phenom II X2 B55
Phenom II X2 B55
AMD EPYC 9755
EPYC 9755

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Community ratings

Here you can see how users rate the processors, as well as rate them yourself.


3.7 36 votes

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