AMD® Phenom™ II X6 1055T
The AMD Phenom II X6 1055T is a desktop processor released on April 27, 2010. It has 6 cores and 6 threads, a base clock of 2.80 GHz, a maximum boost of 3.30 GHz, 6 MB of L3 cache, a 125 W TDP and the AM3 socket.
Overview
SummaryThe AMD Phenom II X6 1055T is a desktop processor with 6 cores and 6 threads. It launched in Apr 2010. Clocks run from 2.8 GHz base to 3.3 GHz boost. A 6-MB L3 cache backs the cores (1.6 MB per core). It uses the AM3 socket. Rated TDP is 125 W.
Performance
12 metricsThe AMD Phenom II X6 1055T scores 1,323 in single-core performance and 3,401 in multi-core performance (PassMark CPU Mark ratings). From those two ratings Feex computes 2,121 for overall performance, 4,063 for productivity performance, 4,252 for creator performance, 3,380 for engineering performance and 4,819 for gaming performance. Its multi-core throughput works out to 567 per core, 567 per thread and 27 per watt. Its computed efficiency index is 190. Its performance index is 26, so its overall performance is 74% below the Intel Core i5-12400 (index 100). Each bar shows the score as a share of a reference ceiling, which is the larger of the 99th-percentile score across the Feex CPU database and a fixed baseline.
How these scores are computed
Single-core and multi-core performance are PassMark CPU Mark single-thread and multi-thread ratings. Every other figure on this page's performance section is computed by Feex from those two ratings plus core count, thread count and TDP, so it is a derived value and not a separate benchmark run.
- Overall performance is the geometric mean of the two ratings: the square root of single-core times multi-core.
- Productivity performance is 0.65 times multi-core plus 1.4 times single-core.
- Creator performance is 0.55 times multi-core plus 1.8 times single-core.
- Engineering performance is multi-core times the smaller of 1.4 and (0.9 plus cores divided by 64).
- Gaming performance is 3 times single-core plus 0.25 times multi-core.
- Performance per core, per thread and per watt divide the multi-core rating by physical cores, logical threads and TDP in watts.
- The efficiency index is the square root of single-core times multi-core, divided by the square root of TDP.
- The performance index is overall performance divided by the overall performance of the Intel Core i5-12400 (8,069), times 100.
Workload Benchmarks
8 workloadsScores for individual PassMark CPU Mark test categories. Higher is better. These are measured test scores, not computed from the single-core and multi-core ratings.
In the individual workload tests the AMD Phenom II X6 1055T scores 10,293 in integer math, 7,470 in floating-point math, 75,050 in compression, 915 in cryptography, 260 in physics simulation, 1,810 in vector SIMD, 18 in the prime sieve and 9,347 in sorting. Higher is better. Compared with the Intel Core i5-12400, it is 83% below in integer math, 84% below in floating-point math, 67% below in compression, 92% below in cryptography, 76% below in physics simulation, 88% below in vector SIMD, 73% below in the prime sieve and 59% below in sorting. Each bar shows the score as a share of that workload's reference ceiling, the larger of the 99th-percentile score across CPUs with a recorded value and a fixed baseline.
Core Configuration
7 specsThe AMD Phenom II X6 1055T has 6 physical cores and runs 6 logical threads. It does not use a hybrid performance and efficiency core layout. It does not support simultaneous multithreading, so its thread count equals its core count. It runs at a base clock of 2.80 GHz and boosts up to 3.30 GHz.
Architecture & Generation
4 specsThe AMD Phenom II X6 1055T is a desktop processor and belongs to the AMD Phenom family. It launched in Apr 2010.
Cache
6 specsThe AMD Phenom II X6 1055T has 768 KB of L1 cache, 3 MB of L2 cache and 6 MB of L3 cache. That adds up to about 9.8 MB of cache, or 1.63 MB per core. Each core has 512 KB of private L2 cache.
Cache Hierarchy
3 levelsThe AMD Phenom II X6 1055T has a 3-level cache hierarchy: L1 at 768 KB, L2 at 3 MB and L3 at 6 MB. L3 is the largest level and makes up about 62% of the cache listed here.
Platform & Compatibility
1 specThe AMD Phenom II X6 1055T uses the AM3 socket.
Power & Thermals
1 specThe AMD Phenom II X6 1055T has a rated TDP of 125 W.
Platform Capabilities
6 supported, 1 not supportedInstruction sets, security, virtualization, AI acceleration and OS readiness. Features are listed as supported, explicitly not supported, or not recorded; a feature that is not recorded is not the same as unsupported.
Instruction Sets
6 supportedSecurity and Reliability
0 supportedVirtualization
0 supportedOS Compatibility
0 supportedThe AMD Phenom II X6 1055T supports 64-bit (x86-64), ABM, SSE, SSE2, SSE3 and MMX among its instruction set features. Feex has no record for AES-NI, AVX-512, AVX2, AVX, AVX-VNNI and CET, which is different from being unsupported.
Feex has no record for AMD SEV, AMD SME, Control-flow Enforcement (CET), Execute Disable (NX), Memory Encryption and SMAP, which is different from being unsupported.
Feex has no record for AMD SVM, AMD-V (Hardware Virtualization), NPT / RVI, IOMMU and Second-Level Address Translation, which is different from being unsupported.
Feex records these as not true for the AMD Phenom II X6 1055T: Windows 11 eligible.
Naming & Aliases
3 specsReal-world compute in the Feex fleet
No machines yetNo Feex fleet machines with the AMD Phenom II X6 1055T have reported compute telemetry yet, so real-world compute for this processor is not recorded.
Data Coverage
40% recordedFeex has recorded 40% of the specifications it tracks for the AMD Phenom II X6 1055T. Values Feex does not hold are shown as "Not recorded" rather than estimated.
Not recorded: Core Configuration: Efficiency Cores, All-Core Boost and Unlocked Multiplier. Architecture & Generation: Codename, ISA Family and Market Status. Cache: L4 Cache. Memory Support: Max Memory, Memory Channels, Memory Bandwidth, Memory Types, DDR5 Support, DDR4 Support, LPDDR Support, ECC Memory and Max Memory Speed. Graphics: Integrated Graphics, Graphics Model, Graphics Base Clock, Graphics Max Clock, Execution Units, Display Outputs and Max Video Memory. Platform & Compatibility: Package, Package Size and PCIe Lanes. Power & Thermals: Base Power, Maximum Turbo Power, Configurable TDP (Min), Configurable TDP (Max), Max Junction Temperature and Tcase. Physical & Manufacturing: Transistor Count, Die Size, Die Count, Foundry and Launch Price. Naming & Aliases: SKU, Model Number, Processor Number and Part Number.
Common questions
7 answeredHow many cores and threads does the AMD Phenom II X6 1055T have?
The AMD Phenom II X6 1055T has 6 cores and 6 threads.
What socket does the AMD Phenom II X6 1055T use?
The AMD Phenom II X6 1055T uses the AM3 socket.
How fast does the AMD Phenom II X6 1055T run?
The AMD Phenom II X6 1055T can boost up to 3.3 GHz, with a 2.8 GHz base clock.
What is the TDP of the AMD Phenom II X6 1055T?
The AMD Phenom II X6 1055T has a TDP of 125 W.
How does the AMD Phenom II X6 1055T perform?
In the Feex normalized performance dataset, the AMD Phenom II X6 1055T scores 3,401 multi-core and 1,323 single-core.
How much cache does the AMD Phenom II X6 1055T have?
The AMD Phenom II X6 1055T has 768 KB of L1 cache, 3072 KB of L2 cache and 6 MB of L3 cache.
How does the AMD Phenom II X6 1055T compare with the Intel Core i5-12400?
The AMD Phenom II X6 1055T has a computed performance index of 26, which is 74% below the Intel Core i5-12400 (index 100). The index is derived from the single-core and multi-core ratings.