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Gaming Performance Comparison

Recommended System Requirements
Game Phenom II X4 B65 Phenom II X6 1045T
Red Dead Redemption 2 90% 70%
Cyberpunk 2077 61% 45%
Doom Eternal 56% 40%
Call of Duty: Modern Warfare 41% 26%
Dragon Ball Z Kakarot 43% 28%
Halo: Reach 22% 30%
Microsoft Flight Simulator 106% 85%
Star Wars: Jedi - Fallen Order 109% 88%
Grand Theft Auto VI 158% 131%
Need For Speed Heat 60% 44%

In terms of overall gaming performance, the AMD Phenom II X6 1045T is noticeably better than the AMD Phenom II X4 B65 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.

The Phenom II X4 was released less than a year after the Phenom II X6, and so they are likely to have similar levels of support, and similarly optimized performance when running the latest games.

Both CPUs exhibit very powerful performance, so it probably isn't worth upgrading from one to the other, as both are capable of running even the most demanding games at the highest settings (assuming they are accompanied by equivalently powerful GPUs).

The Phenom II X6 has 2 more cores than the Phenom II X4. 6 cores is probably excessive if you mean to just run the latest games, as games are not yet able to harness this many cores. The cores in the Phenom II X4 is more than enough for gaming purposes.

The Phenom II X6 has 2 more threads than the Phenom II X4. 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 Phenom II X6 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 Phenom II X4 has a 0.7 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 Phenom II X6.

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 Phenom II X6 has a 1024 KB bigger L2 cache than the Phenom II X4, and the two CPUs have the same L3 cache size, so the Phenom II X6 wins out in this area with its larger L2 cache.

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.

Both the Phenom II X4 and the Phenom II X6 have the same TDP of 95 Watts, and were created with the same manufacturing size of 45 nm, which means they will affect your yearly electricity bill about equally.

CPU Core Details

CPU CodenameDenebThuban
MoBo SocketSocket AM2+Socket AM3
Notebook CPUnono
Release Date07 Dec 201031 Aug 2010
CPU LinkGD LinkGD Link
Approved

CPU Technical Specifications

CPU Cores4vs6
CPU Threads4vs6
Clock Speed3.4 GHzvs2.7 GHz
Turbo Frequency-vs3.2 GHz
Max TDP95 Wvs95 W
Lithography45 nmvs45 nm
Bit Width64 Bitvs64 Bit
Max Temperature-vs71°C
Virtualization Technologynovsno
Comparison

CPU Cache and Memory

L1 Cache Size512 KBvs768 KB
L2 Cache Size2048 KBvs3072 KB
L3 Cache Size6 MBvs6 MB
Memory Channels-vs2
ECC Memory Supportnovsno
Comparison

CPU Graphics

Graphics
Base GPU Frequency-vs-
Max GPU Frequency-vs-
DirectX-vs-
Displays Supported-vs-
Comparison

CPU Package and Version Specifications

Package Size-vs-
Revision-vs-
PCIe Revision-vs-
PCIe Configurations-vs-

Gaming Performance Value

Performance Value

CPU Mini Review

Mini ReviewPhenom II X4 B65 is an unlocked Phenom II X2 565.

It should offer similar performance to a Phenom II X4 B99.
Phenom II X6 1045T is a high-end processor based on the 45nm Leo architecture.

It offers 6 Physical Cores (6 Logical), initially clocked at 2.7GHz, which may go up to 3.2GHz and 6MB of L3 Cache.
Among its many features, Turbo Core and Virtualization are activated and the clock multiplier is unlocked, meaning it can be overclocked easily.

The processor DOES NOT integrate any graphics. and has a rated board TDP of 95W.

It is a powerful processor whose performance is good. It's thus capable of running most applications smoothly without any problem.

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