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Gaming Performance Comparison

Recommended System Requirements
Game Phenom II X4 B65 Xeon E5-2640 v2
Halo: Reach 22% 50%
Cyberpunk 2077 61% 2%
Red Dead Redemption 2 90% 21%
Dragon Ball Z Kakarot 43% 9%
Call of Duty: Modern Warfare 41% 11%
Doom Eternal 56% 1%
Microsoft Flight Simulator 106% 31%
Grand Theft Auto VI 158% 64%
FIFA 20 36% 14%
Need For Speed Heat 60% 2%

In terms of overall gaming performance, the Intel Xeon E5-2640 v2 is massively 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 E5-2640 v2 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 E5-2640 v2 has 4 more cores than the Phenom II X4. 8 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. However, if you intend on running a server with the Xeon E5-2640 v2, it would seem to be a decent choice.

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 Xeon E5-2640 v2 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 1.4 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 probably a good indicator that the Xeon E5-2640 v2 is superior.

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 1792 KB bigger L2 cache than the Xeon E5-2640 v2, but on the other hand, it is the Xeon E5-2640 v2 that has a 14 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.

Both the Phenom II X4 and the Xeon E5-2640 v2 have the same TDP of 95 Watts, but the Xeon E5-2640 v2 has a lower lithography size, and so will affect your yearly electricity bills less adversely.

CPU Core Details

CPU CodenameDenebIvy Bridge
MoBo SocketSocket AM2+LGA 2011/Socket R
Notebook CPUnono
Release Date07 Dec 201010 Sep 2014
CPU LinkGD LinkGD Link
Approved

CPU Technical Specifications

CPU Cores4vs8
CPU Threads4vs-
Clock Speed3.4 GHzvs2 GHz
Turbo Frequency-vs2.5 GHz
Max TDP95 Wvs95 W
Lithography45 nmvs22 nm
Bit Width64 Bitvs64 Bit
Voltage Range-vs0.651.30V KB
Max Temperature-vs75°C
Virtualization Technologynovsno
Comparison

CPU Cache and Memory

L1 Cache Size512 KBvs-
L2 Cache Size2048 KBvs256 KB
L3 Cache Size6 MBvs20 MB
Memory Channels-vs-
ECC Memory Supportnovsno
Comparison

CPU Graphics

Graphicsno
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.
Intel Xeon E5-2640 v2 is a Server CPU part of the Xeon E5 v2 Series released by Intel in September 2013.
It's based on the Sandy Bridge architecture and the memory controller supports DDR3-800, DDR3-1066, DDR3-1333 and DDR3-1600.
It has 8 cores.
The performance of this server processor is excellent.

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