Select any two CPUs for comparison
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Gaming Performance Comparison

Recommended System Requirements
Game Opteron 6276 Xeon Processor E5640
Hitman 3 11% 145%
Cyberpunk 2077 17% 82%
Assassins Creed: Valhalla 11% 145%
Resident Evil 8 8% 102%
FIFA 21 23% 70%
Grand Theft Auto VI 36% 199%
Call of Duty: Black Ops Cold War 20% 76%
Genshin Impact 37% 38%
Far Cry 6 30% 187%
The Medium 42% 212%

In terms of overall gaming performance, the AMD Opteron 6276 is massively better than the Intel Xeon Processor E5640 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 Opteron 6276 was released over a year more recently than the Xeon Processor E5640, and so the Opteron 6276 is likely to have better levels of support, and will be more optimized for running the latest games.

The Opteron 6276 has 12 more cores than the Xeon Processor E5640. 16 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 Xeon Processor E5640 is more than enough for gaming purposes. However, if you intend on running a server with the Opteron 6276, 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 Opteron 6276 and Xeon Processor E5640 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 Xeon Processor E5640 has a 0.37 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 Opteron 6276.

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 Xeon Processor E5640 has a 24 KB bigger L2 cache than the Opteron 6276, but on the other hand, it is the Opteron 6276 that has a 16372 MB bigger L3 cache than the Xeon Processor E5640. In this case, the L2 size is probably what counts, so the Xeon Processor E5640 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 Xeon Processor E5640 has a 35 Watt lower Maximum TDP than the Opteron 6276 (though they were created with the same size 32 nm manufacturing technology). What this means is the Xeon Processor E5640 will consume significantly less power and consequently produce less heat, enabling more prolonged computational tasks with fewer adverse effects. This will lower your yearly electricity bill significantly, as well as prevent you from having to invest in extra cooling mechanisms (unless you overclock).

CPU Core Details

CPU CodenameInterlagosWestmere-EP
MoBo SocketSocket G34LGA 1366/Socket B
Notebook CPUnono
Release Date14 Nov 201116 Mar 2010
CPU LinkGD LinkGD Link
Approved

CPU Technical Specifications

CPU Cores16vs4
Clock Speed2.3 GHzvs2.67 GHz
Turbo Frequency-vs-
System Bus 6400 MHzvs-
Max TDP115 Wvs80 W
Lithography32 nmvs32 nm
Bit Width-vs-
Max Temperature55°Cvs-
Virtualization Technologyyesvsno
Comparison

CPU Cache and Memory

L1 Cache Size48 KBvs128 KB
L1 Cache Count16vs-
L2 Cache Size1000 KBvs1024 KB
L2 Cache Count16vs-
L2 Cache Speed2300 MHzvs-
L3 Cache Size16384 MBvs12 MB
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 ReviewOpteron Hexadeca Core 6274 is a 16-Core Server CPU part of the Opteron 6200 Series released by AMD in 2011/2012.
Each Core is clocked at 2.2 and features one thread, making a total of 16.
Obviously not designed for gaming, due to its tremendous price, it will deliver great performance for those crazy enough to use for extreme gaming performance.
Intel Xeon E5640 is a Server CPU part of the Xeon Series continuously released by Intel.
It's based on the Nehalem architecture and the memory controller supports DDR3-800 and DDR3-1066.
The performance though good, falls behind most Intel i5, i7 and since Intel Xeon E5640 wasn't built for gaming purposes it comes at a considerably high price.

Vendor-Specific Features

AMD Power ManagementIntel Quick Sync Video
AMDBusiness ClassIntel InTru 3D
AMD Black EditionIntel Insider
Intel Wireless Display
Intel Flexible Display
Intel Clear Video HD
Intel vPro
Intel Hyper-Threading
Intel Virt. Tech. for Directed I/O
Intel Trusted Execution
AES New Instructions
Intel Anti-Theft
Idle States
Intel SpeedStep
Thermal Monitoring
Execute Disable Bit
Intel VT-x with EPT
Embedded Options