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CPU Core Details

CPU Codename Ivy Bridge-H2 Sandy Bridge
MoBo Socket LGA 1155/Socket H2 LGA 1155/Socket H2
Notebook CPU no no
Release Date 14 May 2012 03 Jun 2012
CPU Link GD Link GD Link
Approved

CPU Technical Specifications

{
CPU Cores 4 2
CPU Threads 4 2
Clock Speed 3.2 GHz 2.4 GHz
Turbo Frequency 3.6GHz -
Max TDP 77 W 35 W
Lithography 22 nm 32 nm
Bit Width 64 Bit 64 Bit
Max Temperature - 65°C
Virtualization Technology no no

CPU Cache and Memory

L1 Cache Size 128 KB 128 KB
L2 Cache Size 1024 KB 512 KB
L3 Cache Size 8 MB 3 MB
Memory Types
Max Memory Size 32 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 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. Pentium G640T 2.4GHz is an energy efficient budget processor based on the 32nm, Sandy Bridge architecture. <br/> <br/> It offers 2 Physical Cores (2 Logical), clocked at 2.4GHz and 3MB of L3 Cache. <br/> Among its many features, <b>Virtualization</b> is activated. <br/> <br/> The processor integrates very weak Graphics called <b>Intel HD Graphics Desktop (Bay Trail)</b>, with 6 Execution Units, initially clocked at 650MHz and that go up to 1100MHz, 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 35W. <br/> <br/> It offers average performance. This means it will become a bottleneck in some demanding applications.

Gaming Performance Comparison

In terms of overall gaming performance, the Intel Xeon E3-1225 v2 is massively better than the Intel Pentium G640T 2.4GHz 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 Xeon E3-1225 v2 and the Pentium G640T 2.4GHz were released at the same time, so are likely to be quite similar.

The 4 has 2 more cores than the Pentium G640T 2.4GHz. { With 4 cores, the 4 is much less likely to struggle with the latest games, or bottleneck high-end graphics cards when running them.

The Xeon E3-1225 v2 has 2 more threads than the Pentium G640T 2.4GHz. 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 Xeon E3-1225 v2 and Pentium G640T 2.4GHz 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 0.8 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 4 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'>Xeon E3-1225 v2</span> has a 512 KB bigger L2 cache than the <span class='gpu2Mention'>Pentium G640T 2.4GHz</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.