AMD Phenom II X4 X940 BE

The AMD Phenom II Black Edition Quad-Core X940 or Phenom II X4 X940 BE is the fastest version of the Phenom II X4 for laptops (in Q1 2011) and features an unlocked multiplier for easy overclocking. With 45W TDP the AMD CPU needs as much power as the Core i7 quad cores but due to the missing level 3 cache and Turbo Boost, the performance should be worse. Compared to the desktop CPUs, the mobile Phenom II X4 is similar to a Athlon II X4 and produced in 45nm SOI.

The performance of the 100MHz slower predecessor Phenom II X920 differs from benchmark to benchmark. If only one core is used, the AMD quad core processor is only on par with a slow 2 GHz Core 2 Duo (e.g. Cinebench R10 Single). The old single threaded SuperPi benchmark is traditionally for AMD even worst on a level of a 1.4 GHz Core 2 Duo. However, if all four cores are used, the performance scores are in regions of the fast dual cores Core i5-540M to i7-640M (Cinebench R10 Multi, wPrieme 2, CB 11.5). The slowest Core i7 quad core (720QM) is still in every benchmark faster than the AMD CPU.

The Phenom II includes an integrated memory controller for DDR3 (max. 1333) main memory. It supports MMX, 3DNow!, SSE, SSE2, SSE3, SSE4A.

SeriesAMD Phenom II X4
Clock Rate2400 MHz
Front Side Bus3600 MHz
Level 1 Cache256 KB
Level 2 Cache2048 KB
Number of Cores / Threads4 / 4
Max. Power Consumption (TDP = Thermal Design Power)45 Watt
Manufacturing Technology45 nm
Featuresintegrated DDR3-1333 memory controller, HyperTransport 3.0, Enhanced Virus Protection, AMD64, SSE4A, unlocked multiplier
64 Bit64 Bit support
Hardware VirtualizationAMD-V
Announcement Date01/01/2011
Product Link (external)AMD Phenom II X4 X940 BE


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Other CPUs of the series AMD Phenom II X4

» AMD Phenom II X4 X940 BE
   2.4 GHz / 2 MB
» AMD Phenom II X4 X920 BE
   2.3 GHz / 2 MB
» AMD Phenom II X4 N970
   2.2 GHz / 2 MB
» AMD Phenom II X4 N950
   2.1 GHz / 2 MB
» AMD Phenom II X4 N930
   2 GHz / 2 MB
» AMD Phenom II X4 P960
   1.8 GHz / 2 MB
» AMD Phenom II X4 P940
   1.7 GHz / 2 MB
» AMD Phenom II X4 P920
   1.6 GHz / 2 MB

Surrounding CPUs

- Intel Core i5 430M
   2.26 GHz / 0.5 MB + 3 MB
- AMD A-Series A10-5750M
   2.5 GHz / 4 MB
- AMD A-Series A10-5757M
   2.5 GHz / 4 MB
- Intel Core i7 2637M
   1.7 GHz / 0.5 MB + 4 MB
- AMD Phenom II X2 X640 BE
   3.2 GHz / 2 MB
» AMD Phenom II X4 X940 BE
   2.4 GHz / 2 MB
+ Intel Core i7 2657M
   1.6 GHz / 512 KB + 4096 KB
+ Intel Core i7 3689Y
   1.5 GHz / 512 KB + 4096 KB
+ Intel Pentium 2020M
   2.4 GHz / 512 KB + 2048 KB
+ AMD Phenom II X2 X620 BE
   3.1 GHz / 2048 KB
+ Intel Core i3 4158U
   2 GHz / 512 KB + 3072 KB
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> Notebook / Laptop Reviews and News > Benchmarks / Tech > Notebook Processors > AMD Phenom II X4 X940 BE Notebook Processor
Klaus Hinum (Update: 2017-09- 5)