Select any two CPUs for comparison
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Gaming Performance Comparison

Recommended System Requirements
Game Pentium III S1400MHz Athlon XP 2800+
Cyberpunk 2077 2151% 1984%
Assassins Creed: Valhalla 2931% 2706%
Call of Duty: Black Ops Cold War 2082% 1920%
Hitman 3 2931% 2706%
Grand Theft Auto VI 3600% 3326%
FIFA 21 2006% 1850%
Far Cry 6 3452% 3188%
Genshin Impact 1605% 1478%
World of Warcraft: Shadowlands 3400% 3141%
Watch Dogs Legion 2931% 2706%

In terms of overall gaming performance, the AMD Athlon XP 2800+ is marginally better than the Intel Pentium III S1400MHz 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 XP 2800+ was released less than a year after the Pentium III S1400MHz, and so they are likely to have similar levels of support, and similarly optimized performance when running the latest games.

Both CPUs exhibit very poor performance, so rather than upgrading from one to the other you should consider looking at more powerful CPUs. Neither of these will be able to run the latest games in any playable way.

The Pentium III S1400MHz and the Athlon XP 2800+ both have 1 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 Pentium III S1400MHz and the Athlon XP 2800+ 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 Pentium III S1400MHz and Athlon XP 2800+ 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 XP 2800+ has a 0.733 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 Pentium III S1400MHz and the Athlon XP 2800+ have the same L2 cache size, and neither CPU appears to have an L3 cache. In this case, the Athlon XP 2800+ has a 96 KB bigger L1 cache, so would probably provide better performance than the Pentium III S1400MHz, 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 Pentium III S1400MHz has a 36 Watt lower Maximum TDP than the Athlon XP 2800+ (though they were created with the same size 130 nm manufacturing technology). What this means is the Pentium III S1400MHz 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 CodenameTualatinBarton (Model 10)
MoBo SocketSocket 370Socket 462/Socket A
Notebook CPUnono
Release Date30 Nov -000110 Feb 2003
CPU LinkGD LinkGD Link
Approved

CPU Technical Specifications

CPU Cores1vs1
CPU Threads1vs-
Clock Speed1.4 GHzvs2.133 GHz
Turbo Frequency-vs-
System Bus -vs333 MHz
Max TDP32 Wvs68 W
Lithography130 nmvs130 nm
Bit Width-vs-
Max Temperature69°Cvs-
Virtualization Technologynovsno
Comparison

CPU Cache and Memory

L1 Cache Size32 KBvs128 KB
L2 Cache Size512 KBvs512 KB
L3 Cache Size-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 ReviewThe Pentium III (marketed as Intel Pentium III Processor, informally PIII, also stylized as Pentium !!! ) brand refers to Intel's 32-bit x86 desktop and mobile microprocessors based on the sixth-generation P6 microarchitecture introduced on February 26, 1999. The brand's initial processors were very similar to the earlier Pentium II-branded microprocessors. The most notable differences were the addition of the SSE instruction set (to accelerate floating point and parallel calculations), and the introduction of a controversial serial number embedded in the chip during the manufacturing processThe Athlon made its debut on June 23, 1999. Athlon is the ancient Greek word for Champion/trophy of the games.
Athlon is the brand name applied to a series of x86-compatible microprocessors designed and manufactured by Advanced Micro Devices (AMD). The original Athlon (now called Athlon Classic) was the first seventh-generation x86 processor and retained the initial performance lead it had over Intel's competing processors for a significant period of time. The original Athlon also had the distinction of being the first desktop processor to reach speeds of one gigahertz (GHz). AMD has continued using the Athlon name with the Athlon 64, an eighth-generation processor featuring x86-64 (later renamed AMD64) architecture, and the Athlon II.