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CPU Core Details

CPU Codename Deneb Brisbane
MoBo Socket Socket AM3 Socket AM2
Notebook CPU no no
Release Date 02 Jun 2009 01 Jun 2008
CPU Link GD Link GD Link
Approved

CPU Technical Specifications

{
CPU Cores 4 2
CPU Threads 4 2
Clock Speed 2.5 GHz 3.1 GHz
Turbo Frequency - -
System Bus - 1000 MHz
Max TDP 65 W 89 W
Lithography 45 nm 65 nm
Bit Width 64 Bit 64 Bit
Max Temperature 70°C 62°C
Virtualization Technology no no

CPU Cache and Memory

L1 Cache Size 64 KB 256 KB
L2 Cache Size 2048 KB 1024 KB
L3 Cache Size 6 MB -
Memory Types
Memory Channels 2 2
ECC Memory Support no no

CPU Graphics

Integrated Graphics no no
Base GPU Frequency - -
Max GPU Frequency - -
DirectX - -
Displays Supported - -

CPU Mini Review

Mini Review Phenom II X4 905e is an energy efficient processor based on the 45nm, K10 architecture. <br/> <br/> It offers 4 Physical Cores (4 Logical), clocked at 2.5GHz and 6MB of L3 Cache. <br/> Among its many features, <b>Virtualization</b> is activated and the clock multiplier is unlocked, meaning it can be overclocked easily. <br/> <br/> The processor DOES NOT integrate any graphics. and has a rated board TDP of 65W. <br/> <br/> It offers average performance. This means it will become a bottleneck in some demanding applications. Athlon 64 X2 Dual Core 6000+ is a middle-class Processor based on the 65nm K8 micro-architecture. <br/> <br/> It offers 2 Physical Cores (2 Logical), clocked at 3.1GHz and 2MB of L2 Cache. <br/> Among its many features, <b>Virtualization</b> is activated. <br/> <br/> The processor DOES NOT integrated any graphics. and has a rated board TDP of 89W. <br/> <br/> It offers average performance. It will therefore become a bottleneck in today's demanding games.

Gaming Performance Comparison

In terms of overall gaming performance, the AMD Phenom II X4 905e is massively better than the AMD Athlon 64 X2 Dual Core 6000+ when it comes to running the latest games. This also means it will be less likely to bottleneck more powerful GPUs, allowing them to achieve more of their gaming performance potential.

Both the Phenom II X4 905e and the Athlon 64 X2 Dual Core 6000+ were released at the same time, so are likely to be quite similar.

The 4 has 2 more cores than the Athlon 64 X2. { With 4 cores, the 4 is much less likely to struggle with the latest games, or bottleneck high-end graphics cards when running them.

The Phenom II X4 has 2 more threads than the Athlon 64 X2. Both CPUs have one thread per physical core.

Multiple threads are useful for improving the performance of multi-threaded applications. Additional cores and their accompanying thread will always be beneficial for multi-threaded applications. Hyperthreading will be beneficial for applications optimized for it, but it may slow others down. For games, the number of threads is largely irrelevant, as long as you have at least 2 cores (preferably 4), and hyperthreading can sometimes even hit performance.

More important for gaming than the number of cores and threads is the clock rate. Problematically, unless the two CPUs are from the same family, this can only serve as a general guide and nothing like an exact comparison, because the clock cycles per instruction (CPI) will vary so much.

The Phenom II X4 and Athlon 64 X2 are not from the same family of CPUs, so their clock speeds are by no means directly comparable. Bear in mind, then, that while the Athlon 64 X2 has a 0.6 GHz faster frequency, this is not always an indicator that it will be superior in performance, despite frequency being crucial when trying to avoid GPU bottlenecking. In this case, however, the difference is enough that it possibly indicates the superiority of the 4.

Aside from the clock rate, the next-most important CPU features for PC game performance are L2 and L3 cache size. Faster than RAM, the more cache available, the more data that can be stored for lightning-fast retrieval. L1 Cache is not usually an issue anymore for gaming, with most high-end CPUs eking out about the same L1 performance, and L2 is more important than L3 - but L3 is still important if you want to reach the highest levels of performance. Bear in mind that although it is better to have a larger cache, the larger it is, the higher the latency, so a balance has to be struck.

The <span class='gpu1Mention'>Phenom II X4</span> has a 1024 KB bigger L2 cache than the <span class='gpu2Mention'>Athlon 64 X2</span>, and although the Athlon 64 X2 does not appear to have an L3 cache, its larger L2 cache means that it wins out in this area.

The maximum Thermal Design Power is the power in Watts that the CPU will consume in the worst case scenario. The lithography is the semiconductor manufacturing technology being used to create the CPU - the smaller this is, the more transistors that can be fit into the CPU, and the closer the connections. For both the lithography and the TDP, it is the lower the better, because a lower number means a lower amount of power is necessary to run the CPU, and consequently a lower amount of heat is produced.