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Gaming Performance Comparison

Recommended System Requirements
Game Phenom II X4 B65 Xeon E3-1245
Red Dead Redemption 2 90% 21%
Cyberpunk 2077 61% 3%
Dragon Ball Z Kakarot 43% 8%
Microsoft Flight Simulator 106% 32%
Call of Duty: Modern Warfare 41% 10%
Doom Eternal 56% 0%
FIFA 20 36% 13%
Grand Theft Auto VI 158% 65%
Need For Speed Heat 60% 3%
Halo: Reach 22% 50%

In terms of overall gaming performance, the Intel Xeon E3-1245 is massively better than the AMD Phenom II X4 B65 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 E3-1245 was released less than a year after the Phenom II X4, and so they are likely to have similar levels of support, and similarly optimized performance 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 Phenom II X4 and the Xeon E3-1245 both have 4 cores, which is not likely to be a limiting factor for gaming.

The Xeon E3-1245 has 4 more threads than the Phenom II X4. The Phenom II X4 has one thread per physical core, whereas the Xeon E3-1245 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 Phenom II X4 and Xeon E3-1245 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 Phenom II X4 has a 0.1 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. As such, we need to look elsewhere for more reliable comparisons.

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 Phenom II X4 has a 1024 KB bigger L2 cache than the Xeon E3-1245, but on the other hand, it is the Xeon E3-1245 that has a 2 MB bigger L3 cache than the Phenom II X4. In this case, the L2 size is probably what counts, so the Phenom II X4 is likely superior 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.

Both the Phenom II X4 and the Xeon E3-1245 have the same TDP of 95 Watts, but the Xeon E3-1245 has a lower lithography size, and so will affect your yearly electricity bills less adversely.

The Xeon E3-1245 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 Phenom II X4, 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 P3000, 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 CodenameDenebSandy Bridge
MoBo SocketSocket AM2+LGA 1155/Socket H2
Notebook CPUnono
Release Date07 Dec 201003 Apr 2011
CPU LinkGD LinkGD Link
Approved

CPU Technical Specifications

CPU Cores4vs4
CPU Threads4vs8
Clock Speed3.4 GHzvs3.3 GHz
Turbo Frequency-vs3.7 GHz
Max TDP95 Wvs95 W
Lithography45 nmvs32 nm
Bit Width64 Bitvs64 Bit
Max Temperature-vs73°C
Virtualization Technologynovsno
Comparison

CPU Cache and Memory

L1 Cache Size512 KBvs256 KB
L2 Cache Size2048 KBvs1024 KB
L3 Cache Size6 MBvs8 MB
Max Memory Size-vs32 GB
Memory Channels-vs2
ECC Memory Supportnovsno
Comparison

CPU Graphics

GraphicsIntel HD Graphics P3000
Base GPU Frequency-vs850 MHz
Max GPU Frequency-vs-
DirectX-vs10.1
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 ReviewPhenom II X4 B65 is an unlocked Phenom II X2 565.

It should offer similar performance to a Phenom II X4 B99.
Xeon E3-1245 is a Server Processor based on the 32nm, Sandy Bridge architecture.

It offers 4 Physical Cores (8 Logical), initially clocked at 3.4GHz, which may go up to 3.7GHz and 8MB of L3 Cache.
Among its many features, HyperThreading, Turbo Boost and Virtualization are activated.

The processor integrates average Graphics called Intel HD Graphics P3000, with 12 Execution Units, initially clocked at 850MHz and that go up to 1350MHz, in Turbo Mode which share the L2 Cache and system RAM with the processor.

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

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