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Gaming Performance Comparison

Recommended System Requirements
Game Core i7-7700K 4-Core 4.2GHz Xeon E5-2699 v3
Cyberpunk 2077 43% 47%
Assassins Creed: Valhalla 23% 29%
Call of Duty: Black Ops Cold War 25% 31%
Mafia: Definitive Edition 38% 43%
Genshin Impact 57% 60%
eFootball PES 2021 38% 43%
FIFA 21 46% 50%
Watch Dogs Legion 23% 29%
Death Stranding 30% 35%
Microsoft Flight Simulator 35% 40%

In terms of overall gaming performance, the Intel Xeon E5-2699 v3 is massively better than the Intel Core i7-7700K 4-Core 4.2GHz 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 i7-7700K 4-Core was released over a year more recently than the Xeon E5-2699 v3, and so the Core i7-7700K 4-Core is likely to have better levels of support, and will be more optimized for 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 E5-2699 v3 has 14 more cores than the Core i7-7700K 4-Core. 18 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 Core i7-7700K 4-Core is more than enough for gaming purposes. However, if you intend on running a server with the Xeon E5-2699 v3, it would seem to be a decent choice.

The Xeon E5-2699 v3 has 28 more threads than the Core i7-7700K 4-Core. Both the Core i7-7700K 4-Core and the Xeon E5-2699 v3 use hyperthreading. The Core i7-7700K 4-Core has 2 logical threads per physical core and the Xeon E5-2699 v3 has 2.

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 Core i7-7700K 4-Core and Xeon E5-2699 v3 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 i7-7700K 4-Core has a 1.9 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 E5-2699 v3 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 Xeon E5-2699 v3 has a 2560 KB bigger L2 cache than the Core i7-7700K 4-Core, which means that it, at worst, wins out in this area, and at best, will provide superior gaming performance and will work much better with high-end graphics cards.

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 Core i7-7700K 4-Core has a 50 Watt lower Maximum TDP than the Xeon E5-2699 v3, and was created with a 8 nm smaller manufacturing technology. What this means is the Core i7-7700K 4-Core 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 CodenameKaby LakeHaswell-EP
MoBo SocketLGA 1151LGA 2011/Socket R
Notebook CPUnono
Release Date30 Jan 201701 Sep 2014
CPU LinkGD LinkGD Link

CPU Technical Specifications

CPU Cores4vs18
CPU Threads8vs36
Clock Speed4.2 GHzvs2.3 GHz
Turbo Frequency-vs-
Max TDP95 Wvs145 W
Lithography14 nmvs22 nm
Bit Width64 Bitvs64 Bit
Virtualization Technologynovsno

CPU Cache and Memory

L1 Cache Size256 KBvs1152 KB
L2 Cache Size2048 KBvs4608 KB
L3 Cache Size8 MBvs45 MB
Max Memory Size-vs-
Memory Channels-vs4
ECC Memory Supportnovsno

CPU Graphics

Base GPU Frequency-vs-
Max GPU Frequency-vs-
Displays Supported-vs-

CPU Package and Version Specifications

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

Gaming Performance Value

Performance Value

CPU Mini Review

Mini ReviewLittle is known for definite yet regarding the specific specs of this Intel flagship CPU, but some benchmarks are starting to creep in.
The Core i7-7700K 4-Core 4.2GHz is a high-end CPU based on the 14nm, Kaby Lake micro architecture. It offers 4 physical cores (8 logical), initially clocked at 4.2GHz, which may go up and 8MB of L3 Cache. Among its many features, HyperThreading, Turbo Boost 2.0 and Virtualization are activated and the processor has its multiplier unlocked. This CPU is likely to offer exceptional computational performance and will not be the bottleneck in any modern gaming PC. It will be able to play all modern games comfortably on high/ultra graphics performance without being a hindrance to the accompanying GPU.
Xeon E5-2699 v3 is an upcoming server processor based on the 22nm, Haxwell microarchitecture.