Intel Core i7-5820K 6-Core 3.3GHz
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Intel Xeon Processor X5660
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Gaming Performance Comparison

Recommended System Requirements
Game Core i7-5820K 6-Core 3.3GHz Xeon Processor X5660

In terms of overall gaming performance, the Intel Core i7-5820K 6-Core 3.3GHz is massively better than the Intel Xeon Processor X5660 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 Core i7-5820K 6-Core was released over three years more recently than the Xeon Processor X5660, and so the Core i7-5820K 6-Core is likely to have far better levels of support, and will be much more optimized and ultimately superior to the Xeon Processor X5660 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 Core i7-5820K 6-Core and the Xeon Processor X5660 both have 6 cores, which is not likely to be a limiting factor for gaming.

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 Core i7-5820K 6-Core and Xeon Processor X5660 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 Core i7-5820K 6-Core has a 0.5 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 Core i7-5820K 6-Core and the Xeon Processor X5660 have the same L2 cache size, but the Core i7-5820K 6-Core has a 3 MB bigger L3 cache, so in this area, it wins out over the Xeon Processor X5660.

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 X5660 has a 45 Watt lower Maximum TDP than the Core i7-5820K 6-Core. However, the Core i7-5820K 6-Core was created with a 10 nm smaller manufacturing technology. Overall, by taking both into account, the Xeon Processor X5660 is likely the CPU with the lower heat production and power requirements, by quite a wide margin.

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CPU Core Details

CPU CodenameHaswell-EWestmere-EP
MoBo SocketSocket 2011-3 / R3 / LGA2011-3LGA 1366/Socket B
Notebook CPUnono
Release Date29 Aug 201416 Mar 2010
CPU LinkGD LinkGD Link
Approved

CPU Technical Specifications

CPU Cores6vs6
CPU Threads12vs-
Clock Speed3.3 GHzvs2.8 GHz
Turbo Frequency3.6 GHzvs-
Max TDP140 Wvs95 W
Lithography22 nmvs32 nm
Bit Width64 Bitvs-
Max Temperature67°Cvs-
Virtualization Technologynovsno
Comparison

CPU Cache and Memory

L1 Cache Size768 KBvs192 KB
L2 Cache Size1536 KBvs1536 KB
L3 Cache Size15 MBvs12 MB
Max Memory Size-vs-
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

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PCIe Configurations-vs-

Gaming Performance Value

Performance Value

CPU Mini Review

Mini ReviewCore i7-5820K 6-Core 3.3GHz is an extreme processor based on the 22nm, Haswell architecture.

It offers 6 Physical Cores (12 Logical), initially clocked at 3.3GHz, which may go up to 3.6GHz and 15MB of L3 Cache.
Among its many features, HyperThreading, Turbo Boost and Virtualization are activated and the processor has multiplier unlocked, meaning it can be overclocked easily.

The processor DOES NOT integrate any graphics. and has a rated board TDP of 140W.

Its performance is overall identical to Core i7-4930K and is thus exceptionally good and enough for even the most demanding applications.
Intel Xeon Processor X5660 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 memory controller supports DDR3-800, DDR3-1066 and DDR3-1333.
The performance is quite impressive and surpasses most Ivy Bridge based desktop CPUs but comes at an extremely high price.

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