Select any two CPUs for comparison
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Gaming Performance Comparison

Recommended System Requirements
Game Phenom II X4 B65 Opteron 2381 HE
Halo: Reach 22% 42%
Cyberpunk 2077 61% 192%
Red Dead Redemption 2 90% 244%
Dragon Ball Z Kakarot 43% 160%
Call of Duty: Modern Warfare 41% 155%
Microsoft Flight Simulator 106% 274%
Doom Eternal 56% 183%
Grand Theft Auto VI 158% 367%
FIFA 20 36% 146%
Need For Speed Heat 60% 190%

In terms of overall gaming performance, the AMD Phenom II X4 B65 is massively better than the AMD Opteron 2381 HE 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 Phenom II X4 was released over a year more recently than the Opteron 2381 HE, and so the Phenom II X4 is likely to have better levels of support, and will be more optimized for running the latest games.

The Phenom II X4 and the Opteron 2381 HE both have 4 cores, which is not likely to be a limiting factor for gaming.

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 Opteron 2381 HE 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 0.9 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 Phenom II X4 has a 1536 KB bigger L2 cache than the Opteron 2381 HE, and the two CPUs have the same L3 cache size, so the Phenom II X4 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 Opteron 2381 HE has a 40 Watt lower Maximum TDP than the Phenom II X4 (though they were created with the same size 45 nm manufacturing technology). What this means is the Opteron 2381 HE 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).

CPU Core Details

CPU CodenameDenebShanghai
MoBo SocketSocket AM2+Socket F
Notebook CPUnono
Release Date07 Dec 201022 Apr 2009
CPU LinkGD LinkGD Link
Approved

CPU Technical Specifications

CPU Cores4vs4
CPU Threads4vs-
Clock Speed3.4 GHzvs2.5 GHz
Turbo Frequency-vs-
System Bus -vs2000 MHz
Max TDP95 Wvs55 W
Lithography45 nmvs45 nm
Bit Width64 Bitvs-
Voltage Range-vs1.325V KB
Max Temperature-vs55°C
Virtualization Technologynovsyes
Comparison

CPU Cache and Memory

L1 Cache Size512 KBvs128 KB
L1 Cache Count-vs4
L2 Cache Size2048 KBvs512 KB
L2 Cache Count-vs4
L2 Cache Speed-vs2500 MHz
L3 Cache Size6 MBvs6 MB
Memory Channels-vs-
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 ReviewPhenom II X4 B65 is an unlocked Phenom II X2 565.

It should offer similar performance to a Phenom II X4 B99.
Opteron is AMD's x86 server and workstation processor line, and was the first processor to implement the AMD64 instruction set architecture (known generically as x86-64). It was released on April 22, 2003 with the SledgeHammer core (K8) and was intended to compete in the server and workstation markets, particularly in the same segment as the Intel Xeon processor. Processors based on the AMD K10 microarchitecture (codenamed Barcelona) were announced on September 10, 2007 featuring a new quad-core configuration. The most-recently released Opteron CPUs are the 8- and 12-core Socket G34 Opterons, code-named Magny-Cours.

Vendor-Specific Features

AMD Power ManagementAMD Power Management
AMDBusiness ClassAMD Business Class
AMD Black EditionAMD Black Edition

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