AMD FX-8350
Intel Core i5-2500K 3.3GHz
vs
10
10
Select any two CPUs for comparison

Gaming Performance Comparison

In terms of overall gaming performance, the AMD FX-8350 is massively better than the Intel Core i5-2500K 3.3GHz 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 FX-8350 was released over a year more recently than the Core i5-2500K 3.3GHz, and so the FX-8350 is likely to have better levels of support, and will be more optimized for 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 FX-8350 has 4 more cores than the Core i5-2500K 3.3GHz. 8 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 Core i5-2500K 3.3GHz is more than enough for gaming purposes. However, if you intend on running a server with the FX-8350, it would seem to be a decent choice.

The FX-8350 has 4 more threads than the Core i5-2500K 3.3GHz. Both CPUs have one thread per physical core. The FX-8350 has one thread per physical core, whereas the Core i5-2500K 3.3GHz uses hyperthreading, as it has 1 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 FX-8350 and Core i5-2500K 3.3GHz 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 FX-8350 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 FX-8350 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 FX-8350 has a 7168 KB bigger L2 cache than the Core i5-2500K 3.3GHz, 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.

The Core i5-2500K 3.3GHz has a 30 Watt lower Maximum TDP than the FX-8350 (though they were created with the same size 32 nm manufacturing technology). What this means is the Core i5-2500K 3.3GHz will consume significantly less power and consequently produce less heat, enabling more prolonged computational tasks with fewer adverse effects. This will lower your yearly electricity bill significantly, as well as prevent you from having to invest in extra cooling mechanisms (unless you overclock).

The Core i5-2500K 3.3GHz 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 FX-8350, 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 3000 Desktop, 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.

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CPU Core Details

CPU CodenameVisheraSandy Bridge
MoBo SocketSocket AM3+LGA 1155/Socket H2
Notebook CPUnono
Release Date23 Oct 201209 Jan 2011
CPU LinkGD LinkGD Link
Approved

CPU Technical Specifications

CPU Cores8vs4
CPU Threads8vs4
Clock Speed4 GHzvs3.3 GHz
Turbo Frequency4.2 GHzvs3.7 GHz
Max TDP125 Wvs95 W
Lithography32 nmvs32 nm
Bit Width64 Bitvs64 Bit
Max Temperature-vs73°C
Virtualization Technologynovsno
Comparison

CPU Cache and Memory

L1 Cache Size384 KBvs256 KB
L2 Cache Size8192 KBvs1024 KB
L3 Cache Size8 MBvs6 MB
Max Memory Size-vs32 GB
Memory Channels-vs2
ECC Memory Supportnovsno
Comparison

CPU Graphics

GraphicsIntel HD Graphics 3000 Desktop
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

Battlefield 3vs
The Elder Scrolls Vvs
Far Cry 3vs
Crysis 2vs
Crysis 3vs
Performance Value

CPU Mini Review

Mini ReviewFX-8350 is a high-end CPU based on the 32nm Piledriver architecture.

It offers 8 Physical Cores (8 Logical), initially clocked at 4.0GHz, which may go up to 4.2GHz and 8MB of L3 Cache.
Among its many features, Turbo Core and Virtualization are activated and the clock multiplier is unlocked, meaning it can be overclocked easily.

The processor DOES NOT integrated any graphics. and has a rated board TDP of 125W.

Compared to its competitor Core i7-3770K it performs around 12% worse. Still, its performance is very good and sufficient for extreme gaming.
Core i5-2500K 3.3GHz is a performance CPU based on the 32nm, Sandy Bridge architecture.

It offers 4 Physical Cores (4 Logical), initially clocked at 3.3GHz, which may go up to 3.7GHz and 6MB of L3 Cache.
Among its many features, Turbo Boost and Virtualization are activated and the processor has multiplier unlocked.

The processor integrates relatively weak Graphics called Intel HD Graphics 3000, with 12 Execution Units, initially clocked at 850MHz and that go up to 1100MHz, 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 95W.

Its performance is very good and sufficient for extreme gaming.