Select any two CPUs for comparison
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Gaming Performance Comparison

Recommended System Requirements
Game Opteron 2218 X2 Core 2 Quad Q9400 2.66GHz
Red Dead Redemption 2 286% 136%
Cyberpunk 2077 228% 101%
Doom Eternal 218% 94%
Dragon Ball Z Kakarot 192% 79%
Call of Duty: Modern Warfare 186% 75%
Microsoft Flight Simulator 320% 157%
FIFA 20 176% 69%
Grand Theft Auto VI 425% 221%
Star Wars: Jedi - Fallen Order 327% 161%
Need For Speed Heat 227% 100%

In terms of overall gaming performance, the Intel Core 2 Quad Q9400 2.66GHz is massively better than the AMD Opteron 2218 X2 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 Core 2 Quad was released less than a year after the Opteron 2218 X2, and so they are likely to have similar levels of support, and similarly optimized performance when running the latest games.

The Core 2 Quad has 2 more cores than the Opteron 2218 X2. With 4 cores, the Core 2 Quad is much less likely to struggle with the latest games, or bottleneck high-end graphics cards when running them.

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 Opteron 2218 X2 and Core 2 Quad 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 Core 2 Quad has a 0.06 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 Core 2 Quad has a 4096 KB bigger L2 cache than the Opteron 2218 X2, but neither of the CPUs have L3 caches, so the Core 2 Quad 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.

Both the Opteron 2218 X2 and the Core 2 Quad have the same TDP of 95 Watts, but the Core 2 Quad has a lower lithography size, and so will affect your yearly electricity bills less adversely.

CPU Core Details

CPU CodenameSanta RosaYorkfield
MoBo SocketSocket FLGA 775/ Socket T
Notebook CPUnono
Release Date15 Aug 200610 Aug 2008
CPU LinkGD LinkGD Link
Approved

CPU Technical Specifications

CPU Cores2vs4
CPU Threads-vs4
Clock Speed2.6 GHzvs2.66 GHz
Turbo Frequency-vs-
Max TDP95 Wvs95 W
Lithography90 nmvs45 nm
Bit Width-vs64 Bit
Max Temperature-vs71°C
Virtualization Technologynovsno
Comparison

CPU Cache and Memory

L1 Cache Size256 KBvs256 KB
L2 Cache Size2048 KBvs6144 KB
L2 Cache Speed-vs-
L3 Cache Size-vs-
Memory Channels-vs2
ECC Memory Supportnovsno
Comparison

CPU Graphics

Graphics
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 ReviewFor Socket F and Socket AM2 Opterons, each chip has a four-digit model number, in the form Opteron XZYY. For all Opterons, the first digit (the X) specifies the number of CPUs on the target machine:
1 - Designed for uniprocessor systems
2 - Designed for dual-processor systems
8 - Designed for systems with 4 or 8 processors
For Socket F and Socket AM2 Opterons, the second digit (the Z) represents the processor generation. Presently, only 2 (dual-core), DDR2, 3 (quad-core) and 4 (six-core) are used.
For all Opterons, the last two digits in the model number (the YY) indicate the clock frequency of a CPU, a higher number indicating a higher clock frequency. This speed indication is comparable to processors of the same generation if they have the same amount of cores, single-cores and dual-cores have different indications despite sometimes having the same clock frequency.
The suffix HE or EE indicates a high-efficiency/energy-efficiency model having a lower TDP than a standard Opteron. The suffix SE indicates a top-of-the-line model having a higher TDP than a standard Opteron.
Core 2 Quad Q9400 2.66GHz is a high-end Processor based on the 45nm Core micro-architecture.

It offers 4 Physical Cores (4 Logical), clocked at 2.66GHz and 6MB of L2 Cache.
Among its many features, Virtualization is activated.

The processor DOES NOT integrate any graphics. and has a rated board TDP of 95W.

It offers average performance. It will therefore become a bottleneck in today's demanding games.

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