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CPU Core Details

CPU Codename Coffee Lake R Ivy Bridge-H2
MoBo Socket LGA 1151 LGA 1155/Socket H2
Notebook CPU no no
Release Date 23 Apr 2019 14 May 2012
CPU Link GD Link GD Link
Approved

CPU Technical Specifications

CPU Cores 6 4
CPU Threads 6 4
Clock Speed 1.8 GHz 3.2 GHz
Turbo Frequency 3.4GHz 3.6 GHz
Max TDP 35 W 77 W
Lithography 14 nm 22 nm
Bit Width 64 Bit 64 Bit
Virtualization Technology no no

CPU Cache and Memory

L1 Cache Size 384 KB 128 KB
L2 Cache Size 1536 KB 1024 KB
L3 Cache Size 9 MB 8 MB
Memory Types
Max Memory Size 128 GB 32 GB
Memory Channels 2 2
ECC Memory Support no no

CPU Graphics

Integrated Graphics no no
Base GPU Frequency - -
Max GPU Frequency - -
DirectX - -
Displays Supported - -

CPU Mini Review

Mini Review The Core i5-9400T 6-Core 1.8GHz is a mid-range CPU based on a refinement of the 14nm++ Coffee Lake microarchitecture. The 'T' suffix indicates this a low-power draw variant. It offers 6 physical cores (6 logical), initially clocked at 1.8GHz, which may go up to 3.4GHz using 6 cores with Turbo Boost. The i5-9500F has 9MB of L3 Cache. This chip supports up to 128GB DDR-2666 MHz memory and features Intel UHD 630 integrated graphics. Among its many features, Turbo Boost 2.0, Optane Memory Support, and Virtualization are activated, and its multiplier is not unlocked. This Core i5-9500T CPU offers average gaming performance and should not be a major bottleneck in any modern gaming PC in 2019. It will be able to play all modern games at 60fps comfortably on ultra graphics performance at any supported resolution without being a hindrance to the accompanying GPU. However, performance may become bottlenecked if playing at 144Hz and 1080p or lower screen resolution. Xeon E3-1225 v2 is a Server Processor based on the 22nm, Ivy Bridge architecture. <br/> <br/> It offers 4 Physical Cores (4 Logical), initially clocked at 3.2GHz, which may go up to 3.6GHz and 8MB of L3 Cache. <br/> Among its many features, <b>Turbo Boost and Virtualization</b> are activated. <br/> <br/> The processor integrates mildly powerful Graphics called <b>Intel HD Graphics P4000</b>, 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. <br/> Both the processor and integrated graphics have a rated board TDP of 77W. <br/> <br/> Though not created for gaming purposes, its performance is very good and sufficient for any of today's games.

Gaming Performance Comparison

In terms of overall gaming performance, the Intel Core i5-9400T 6-Core 1.8GHz 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.

Both the Core i5-9400T 6-Core 1.8GHz and the Xeon E3-1225 v2 were released at the same time, so are likely to be quite similar.

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 6 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 4 cores in the Xeon E3-1225 v2 is more than enough for gaming purposes.

The Core i5-9400T 6-Core has 2 more threads than the Xeon E3-1225 v2. Both CPUs have one thread 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 i5-9400T 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 Xeon E3-1225 v2 has a 1.4 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 6 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 <span class='gpu1Mention'>Core i5-9400T 6-Core</span> has a 512 KB bigger L2 cache than the <span class='gpu2Mention'>Xeon E3-1225 v2</span>, 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.