Select any two CPUs for comparison
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Gaming Performance Comparison

Recommended System Requirements
Game Pentium III 1333MHz Sempron 2300+
Cyberpunk 2077 2495% 2541%
Assassins Creed: Valhalla 3394% 3455%
Call of Duty: Black Ops Cold War 2415% 2459%
Watch Dogs Legion 3394% 3455%
FIFA 21 2327% 2370%
Microsoft Flight Simulator 2839% 2891%
Godfall 4912% 5000%
Grand Theft Auto VI 4165% 4240%
World of Warcraft: Shadowlands 3935% 4006%
Genshin Impact 1865% 1899%

In terms of overall gaming performance, the Intel Pentium III 1333MHz is marginally better than the AMD Sempron 2300+ 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 Sempron 2300+ was released less than a year after the Pentium III 1333MHz, 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 1333MHz and the Sempron 2300+ 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 1333MHz and the Sempron 2300+ 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 1333MHz and Sempron 2300+ 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 Sempron 2300+ has a 0.253 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 Pentium III 1333MHz and the Sempron 2300+ have the same L2 cache size, and neither CPU appears to have an L3 cache. In this case, the Sempron 2300+ has a 96 KB bigger L1 cache, so would probably provide better performance than the Pentium III 1333MHz, 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 1333MHz has a 32 Watt lower Maximum TDP than the Sempron 2300+ (though they were created with the same size 130 nm manufacturing technology). What this means is the Pentium III 1333MHz 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 CodenameTualatinThoroughbred (Model 8)
MoBo SocketSocket 370Socket 462/Socket A
Notebook CPUnono
Release Date01 Apr 200128 Jul 2004
CPU LinkGD LinkGD Link
Approved

CPU Technical Specifications

CPU Cores1vs1
Clock Speed1.33 GHzvs1.583 GHz
Turbo Frequency-vs-
System Bus 133 MHzvs-
Max TDP30 Wvs62 W
Lithography130 nmvs130 nm
Bit Width32 Bitvs-
Voltage Range1.5V KBvs-
Max Temperature69°Cvs-
Virtualization Technologynovsno
Comparison

CPU Cache and Memory

L1 Cache Size32 KBvs128 KB
L2 Cache Size256 KBvs256 KB
L2 Cache Speed-vs-
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 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 difference was 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 process.Sempron has been the marketing name used by AMD for several different budget desktop CPUs, using several different technologies and CPU socket formats. The Sempron replaced the AMD Duron processor and competes against Intel's Celeron series of processors. AMD coined the name from the Latin semper, which means always, to suggest the Sempron is suitable for daily use, practical, and part of everyday life.