Select any two CPUs for comparison
VS

Gaming Performance Comparison

Recommended System Requirements
Game Core 2 Duo E6405 2.13GHz Athlon II X2 245e
Cyberpunk 2077 294% 397%
Assassins Creed: Valhalla 430% 569%
Call of Duty: Black Ops Cold War 282% 382%
FIFA 21 268% 365%
Grand Theft Auto VI 547% 717%
Hitman 3 430% 569%
Genshin Impact 198% 276%
Far Cry 6 521% 684%
World of Warcraft: Shadowlands 512% 673%
Watch Dogs Legion 430% 569%

In terms of overall gaming performance, the Intel Core 2 Duo E6405 2.13GHz is noticeably better than the AMD Athlon II X2 245e 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 Athlon II X2 was released less than a year after the Core 2 Duo, and so they are likely to have similar levels of support, and similarly optimized performance when running the latest games.

The Core 2 Duo and the Athlon II X2 both have 2 cores, and so are quite likely to struggle with the latest games, or at least bottleneck high-end graphics cards when running them. With a decent accompanying GPU, the Core 2 Duo and the Athlon II X2 may still be able to run slightly older games fairly effectively.

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 2 Duo and Athlon II X2 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 Athlon II X2 has a 0.767 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 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 Core 2 Duo and the Athlon II X2 have the same L2 cache size, and neither CPU appears to have an L3 cache. In this case, the Athlon II X2 has a 128 KB bigger L1 cache, so would probably provide better performance than the Core 2 Duo, at least 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.

The Athlon II X2 has a 20 Watt lower Maximum TDP than the Core 2 Duo, and was created with a 20 nm smaller manufacturing technology. What this means is the Athlon II X2 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).

CPU Core Details

CPU CodenameConroe-CLRegor
MoBo SocketLGA 775/ Socket TSocket AM2+ / AM3
Notebook CPUnono
Release Date22 Apr 200710 May 2010
CPU LinkGD LinkGD Link
Approved

CPU Technical Specifications

CPU Cores2vs2
CPU Threads2vs-
Clock Speed2.133 GHzvs2.9 GHz
Turbo Frequency-vs-
Max TDP65 Wvs45 W
Lithography65 nmvs45 nm
Bit Width64 Bitvs-
Max Temperature60°Cvs-
Virtualization Technologynovsno
Comparison

CPU Cache and Memory

L1 Cache Size128 KBvs256 KB
L2 Cache Size2048 KBvs2048 KB
L3 Cache Size-vs-
Memory Channels-vs-
ECC Memory Supportnovsno
Comparison

CPU Graphics

Graphicsno
Base GPU Frequency-vs-
Max GPU Frequency-vs-
DirectX-vs-
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 ReviewCore 2 Duo E6405 2.13GHz is a middle-class Processor based on the 65nm Core micro-architecture.

It offers 2 Physical Cores (2 Logical), clocked at 2.13GHz and 2MB of L2 Cache.
Among its many features, Virtualization is activated.

The processor DOES NOT integrated any graphics. and has a rated board TDP of 65W.

Its performance is below the average and so most demanding games will not run optimally.
The Athlon II series is based on the AMD K10 architecture and derived from the Phenom II series. However, unlike its Phenom siblings, it does not contain any L3 Cache. There are two Athlon II dies: the dual-core Regor die with 1 MB L2 Cache per core and the four-core Propus with 512 KB per core. Regor is a native dual-core design with lower TDP and additional L2 to offset the removal of L3 cache. The three core Rana is derived from the Propus quad-core design, with one core disabled.