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Gaming Performance Comparison

Recommended System Requirements
Game Xeon Processor L5640 APU A8-3820 Quad-Core
Cyberpunk 2077 31% 77%
Hitman 3 76% 139%
Assassins Creed: Valhalla 76% 139%
Resident Evil 8 45% 97%
FIFA 21 22% 66%
Grand Theft Auto VI 114% 191%
Call of Duty: Black Ops Cold War 26% 72%
Genshin Impact 1% 34%
The Medium 124% 204%
Far Cry 6 106% 180%

In terms of overall gaming performance, the Intel Xeon Processor L5640 is massively better than the AMD APU A8-3820 Quad-Core 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 APU A8-3820 Quad-Core was released less than a year after the Xeon Processor L5640, 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 Xeon Processor L5640 has 2 more cores than the APU A8-3820 Quad-Core. 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 APU A8-3820 Quad-Core is more than enough for gaming purposes.

The Xeon Processor L5640 has 8 more threads than the APU A8-3820 Quad-Core. The APU A8-3820 Quad-Core has one thread per physical core, whereas the Xeon Processor L5640 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 Xeon Processor L5640 and APU A8-3820 Quad-Core 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 APU A8-3820 Quad-Core has a 0.274 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 Xeon Processor L5640 has a 8192 KB bigger L2 cache than the APU A8-3820 Quad-Core, but neither of the CPUs have L3 caches, so the Xeon Processor L5640 wins out in this area with its larger L2 cache.

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 Processor L5640 has a 5 Watt lower Maximum TDP than the APU A8-3820 Quad-Core (though they were created with the same size 32 nm manufacturing technology). What this means is the Xeon Processor L5640 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 APU A8-3820 Quad-Core 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 L5640, 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 Radeon HD 6550D, 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 CodenameWestmere-EPLlano
MoBo SocketLGA 1366/Socket BSocket FM1
Notebook CPUnono
Release Date16 Mar 201001 Jan 2012
CPU LinkGD LinkGD Link
Approved

CPU Technical Specifications

CPU Cores6vs4
CPU Threads12vs4
Clock Speed2.226 GHzvs2.5 GHz
Turbo Frequency2.8 GHzvs2.8 GHz
Max TDP60 Wvs65 W
Lithography32 nmvs32 nm
Bit Width64 Bitvs64 Bit
Max Temperature69°Cvs73°C
Virtualization Technologynovsno
Comparison

CPU Cache and Memory

L1 Cache Size384 KBvs256 KB
L2 Cache Size12288 KBvs4096 KB
L3 Cache Size-vs-
Max Memory Size-vs-
Memory Channels-vs2
ECC Memory Supportnovsno
Comparison

CPU Graphics

GraphicsRadeon HD 6550D
Base GPU Frequency-vs600 MHz
Max GPU Frequency-vs-
DirectX-vs11
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 L5640 is a Low Voltage Server Processor based on the 32nm, Westmere Architecture.

It offers 6 Physical Cores (12 Logical), Clocked at 2.26GHz that go up to 2.8GHz, in Turbo Mode and 12MB of L2 Cache.
Among its many features, Virtualization is activated.

The processor DOES NOT Integrate any Graphics and has a rated board TDP of 60W.

It offers average performance. It will therefore become a bottleneck in today's demanding games.
APU A8-3820 Quad-Core is a performance CPU based on the 32nm, Lynx architecture.

It offers 4 Physical Cores (4 Logical), initially clocked at 2.5GHz, which may go up to 2.8GHz and 4MB of L2 Cache.

The processor integrates mildly powerful Graphics called Radeon HD 6550D, with 400 Shader Processing Units, clocked at 600MHz, which share the L2 Cache and system RAM with the processor.
Both the processor and integrated graphics have a rated board TDP of 65W.

It is a powerful Quad Core whose performance is good. It's thus capable of running most applications smoothly without any problem.