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Gaming Performance Comparison

Recommended System Requirements
Game Xeon Processor X5647 Phenom II X4 B65
Halo: Reach 30% 22%
Cyberpunk 2077 43% 61%
Red Dead Redemption 2 68% 90%
Dragon Ball Z Kakarot 27% 43%
Call of Duty: Modern Warfare 25% 41%
Doom Eternal 38% 56%
Microsoft Flight Simulator 83% 106%
Grand Theft Auto VI 129% 158%
FIFA 20 20% 36%
Need For Speed Heat 42% 60%

In terms of overall gaming performance, the Intel Xeon Processor X5647 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 Xeon Processor X5647 was released less than a year after the Phenom II X4, 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 Xeon Processor X5647 and the Phenom II X4 both have 4 cores, which is not likely to be a limiting factor for gaming.

The Xeon Processor X5647 has 4 more threads than the Phenom II X4. The Phenom II X4 has one thread per physical core, whereas the Xeon Processor X5647 uses hyperthreading and has 2 logical threads 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 Xeon Processor X5647 and Phenom II X4 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 0.47 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 .

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 X4 has a 1024 KB bigger L2 cache than the Xeon Processor X5647, but on the other hand, it is the Xeon Processor X5647 that has a 6 MB bigger L3 cache than the Phenom II X4. In this case, the L2 size is probably what counts, so the Phenom II X4 is likely superior 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.

The Phenom II X4 has a 35 Watt lower Maximum TDP than the Xeon Processor X5647. However, the Xeon Processor X5647 was created with a 13 nm smaller manufacturing technology. Overall, by taking both into account, the Phenom II X4 is likely the CPU with the lower heat production and power requirements, but there really isn't much in it.

CPU Core Details

CPU CodenameWestmere-EPDeneb
MoBo SocketLGA 1366/Socket BSocket AM2+
Notebook CPUnono
Release Date13 Feb 201107 Dec 2010
CPU LinkGD LinkGD Link
Approved

CPU Technical Specifications

CPU Cores4vs4
CPU Threads8vs4
Clock Speed2.93 GHzvs3.4 GHz
Turbo Frequency-vs-
Max TDP130 Wvs95 W
Lithography32 nmvs45 nm
Bit Width-vs64 Bit
Max Temperature80°Cvs-
Virtualization Technologynovsno
Comparison

CPU Cache and Memory

L1 Cache Size256 KBvs512 KB
L2 Cache Size1024 KBvs2048 KB
L3 Cache Size12 MBvs6 MB
Max Memory Size-vs-
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 ReviewThe Xeon is a brand of x86 microprocessors designed and manufactured by Intel Corporation, targeted at the non-consumer workstation, server, and embedded system markets. Primary advantages of the Xeon CPUs, when compared to the majority of Intel's desktop-grade consumer CPUs, are their multi-socket capabilities, higher core counts, and support for ECC memory.Phenom II X4 B65 is an unlocked Phenom II X2 565.

It should offer similar performance to a Phenom II X4 B99.

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