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Gaming Performance Comparison

Recommended System Requirements
Game Xeon Processor E5420 Xeon E3-1225 v2
Cyberpunk 2077 165% 3%
Assassins Creed: Valhalla 256% 31%
Call of Duty: Black Ops Cold War 156% 6%
Microsoft Flight Simulator 200% 10%
FIFA 21 147% 9%
Immortals: Fenyx Rising 184% 5%
Genshin Impact 100% 26%
Grand Theft Auto VI 335% 60%
World of Warcraft: Shadowlands 311% 51%
Watch Dogs Legion 256% 31%

In terms of overall gaming performance, the Intel Xeon E3-1225 v2 is massively better than the Intel Xeon Processor E5420 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 E3-1225 v2 was released less than a year after the Xeon Processor E5420, and so they are likely to have similar levels of support, and similarly optimized performance when running the latest games.

The Xeon Processor E5420 and the Xeon E3-1225 v2 both have 4 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 Xeon Processor E5420 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 Xeon E3-1225 v2 has a 0.7 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 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 Processor E5420 has a 11264 KB bigger L2 cache than the Xeon E3-1225 v2, and although the Xeon Processor E5420 does not appear to have an L3 cache, its larger L2 cache means that it wins out 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 E3-1225 v2 has a 3 Watt lower Maximum TDP than the Xeon Processor E5420, and was created with a 23 nm smaller manufacturing technology. What this means is the Xeon E3-1225 v2 will consume slightly less power and consequently produce less heat, enabling more prolonged computational tasks with fewer adverse effects. This will lower your yearly electricity bill slightly, as well as prevent you from having to invest in extra cooling mechanisms (unless you overclock).

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 Xeon Processor E5420, 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 CodenameHarpertownIvy Bridge-H2
MoBo SocketLGA 771/Socket JLGA 1155/Socket H2
Notebook CPUnono
Release Date12 Nov 200714 May 2012
CPU LinkGD LinkGD Link
Approved

CPU Technical Specifications

CPU Cores4vs4
CPU Threads-vs4
Clock Speed2.5 GHzvs3.2 GHz
Turbo Frequency-vs3.6 GHz
Max TDP80 Wvs77 W
Lithography45 nmvs22 nm
Bit Width-vs64 Bit
Virtualization Technologynovsno
Comparison

CPU Cache and Memory

L1 Cache Size256 KBvs128 KB
L2 Cache Size12288 KBvs1024 KB
L3 Cache Size-vs8 MB
Max Memory Size-vs32 GB
Memory Channels-vs2
ECC Memory Supportnovsno
Comparison

CPU Graphics

GraphicsnoIntel 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 ReviewXeon Processor E5420 is a Server CPU based on the 45nm, Harpertown architecture.
With most of its features activated, it offers 4 Cores (4 Logical as well), clocked at 2.5GHz, and offers 12MB of L2 Cache.
Obviously not meant for gaming purposes, though its introduction price was not very high, its performance is only average, considering today's standards.
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.