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Gaming Performance Comparison

Recommended System Requirements
Game Core i7-8700K 6-Core 3.7GHz Xeon E3-1225 v2
Cyberpunk 2077 50% 3%
Assassins Creed: Valhalla 33% 31%
Call of Duty: Black Ops Cold War 52% 6%
FIFA 21 53% 9%
Microsoft Flight Simulator 44% 10%
Watch Dogs Legion 33% 31%
World of Warcraft: Shadowlands 23% 51%
Grand Theft Auto VI 18% 60%
Genshin Impact 62% 26%
Horizon: Zero Dawn 44% 10%

In terms of overall gaming performance, the Intel Core i7-8700K 6-Core 3.7GHz is massively better than the Intel Xeon E3-1225 v2 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 i7-8700K 6-Core was released over three years more recently than the Xeon E3-1225 v2, and so the Core i7-8700K 6-Core is likely to have far better levels of support, and will be much more optimized and ultimately superior to the Xeon E3-1225 v2 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 i7-8700K 6-Core has 2 more cores than the Xeon E3-1225 v2. 6 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 E3-1225 v2 is more than enough for gaming purposes.

The Core i7-8700K 6-Core has 8 more threads than the Xeon E3-1225 v2. The Xeon E3-1225 v2 has one thread per physical core, whereas the Core i7-8700K 6-Core 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 Core i7-8700K 6-Core and Xeon E3-1225 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 Core i7-8700K 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 Core i7-8700K 6-Core.

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 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 E3-1225 v2 has a 18 Watt lower Maximum TDP than the Core i7-8700K 6-Core. However, the Core i7-8700K 6-Core was created with a 8 nm smaller manufacturing technology. Overall, by taking both into account, the Xeon E3-1225 v2 is likely the CPU with the lower heat production and power requirements, but there really isn't much in it.

The Xeon E3-1225 v2 has an on-board GPU, which means that it will be capable of running basic graphics applications (i.e., games) without the need for a dedicated graphics card. The Core i7-8700K 6-Core, however, does not, and you will probably have to look for a dedicated card if you wish to use it at all.

For in-depth GPU comparisons with the Intel HD Graphics P4000, click on the following GPU overview comparison icon (visible throughout Game-Debate), and choose a GPU from the list to compare against:

On-board GPUs tend to be fairly awful in comparison to dedicated cards from the likes of AMD or Nvidia, but as they are built into the CPU, they also tend to be cheaper and require far less power to run (this makes them a good choice for laptops). We would recommend a dedicated card for running the latest games, but integrated GPUs are improving all the time and casual gamers may find less recent games perform perfectly acceptably.

CPU Core Details

CPU CodenameCoffee LakeIvy Bridge-H2
MoBo SocketLGA 1151LGA 1155/Socket H2
Notebook CPUnono
Release Date05 Oct 201714 May 2012
CPU LinkGD LinkGD Link
Approved

CPU Technical Specifications

CPU Cores6vs4
CPU Threads12vs4
Clock Speed3.7 GHzvs3.2 GHz
Turbo Frequency4.3 GHzvs3.6 GHz
Max TDP95 Wvs77 W
Lithography14 nmvs22 nm
Bit Width64 Bitvs64 Bit
Virtualization Technologynovsno
Comparison

CPU Cache and Memory

L1 Cache Size-vs128 KB
L2 Cache Size-vs1024 KB
L3 Cache Size12 MBvs8 MB
Max Memory Size-vs32 GB
Memory Channels-vs2
ECC Memory Supportnovsno
Comparison

CPU Graphics

GraphicsIntel HD Graphics P4000
Base GPU Frequency-vs650 MHz
Max GPU Frequency-vs-
DirectX-vs11.0
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 Core i7-8700K 6-Core 3.7GHz is a high-end CPU based on the 14nm Coffee Lake micro architecture. It offers 6 physical cores (12 logical), initially clocked at 3.7GHz, which may go up to 4.3GHz using 6 cores with Turbo Boost, or up to 4.7GHz boost clock on a single core. The i7-8700K has 12MB of L3 Cache. Among its many features, HyperThreading, Turbo Boost 2.0 and Virtualization are activated and the processor has its multiplier unlocked. This Core i7-8700K CPU offers the fastest gaming performance of any Intel CPU as of 2017, 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. [Please be aware that GD data is constantly refined as more information and reports are made available.]Xeon E3-1225 v2 is a Server Processor based on the 22nm, Ivy Bridge architecture.

It offers 4 Physical Cores (4 Logical), initially clocked at 3.2GHz, which may go up to 3.6GHz and 8MB of L3 Cache.
Among its many features, Turbo Boost and Virtualization are activated.

The processor integrates mildly powerful Graphics called Intel HD Graphics P4000, with 20 Execution Units, initially clocked at 650MHz and that go up to 1250MHz, in Turbo Mode which share the L2 Cache and system RAM with the processor.
Both the processor and integrated graphics have a rated board TDP of 77W.

Though not created for gaming purposes, its performance is very good and sufficient for any of today's games.