Select any two CPUs for comparison
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Gaming Performance Comparison

Recommended System Requirements
Game Pentium III 1400MHz Celeron D 320
Cyberpunk 2077 2282% 3684%
Assassins Creed: Valhalla 3107% 4994%
Call of Duty: Black Ops Cold War 2208% 3566%
Watch Dogs Legion 3107% 4994%
Godfall 4501% 7207%
FIFA 21 2128% 3439%
Microsoft Flight Simulator 2598% 4186%
Grand Theft Auto VI 3815% 6118%
World of Warcraft: Shadowlands 3604% 5782%
Genshin Impact 1704% 2765%

In terms of overall gaming performance, the Intel Pentium III 1400MHz is marginally better than the Intel Celeron D 320 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 Celeron D 320 was released less than a year after the Pentium III 1400MHz, 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 1400MHz and the Celeron D 320 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 1400MHz and the Celeron D 320 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 1400MHz and Celeron D 320 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 Celeron D 320 has a 1 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 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 1400MHz has a 42 Watt lower Maximum TDP than the Celeron D 320. However, the Celeron D 320 was created with a 130 nm smaller manufacturing technology. Overall, by taking both into account, the Pentium III 1400MHz and the Celeron D 320 would appear to produce roughly the same amount of heat, and consume about the same amount of power.

CPU Core Details

CPU CodenameTualatin-
MoBo SocketSocket 370Socket 478/Socket N
Notebook CPUnono
Release Date01 Apr 200101 Jun 2004
CPU LinkGD LinkGD Link
Approved

CPU Technical Specifications

CPU Cores1vs1
Clock Speed1.4 GHzvs2.4 GHz
Turbo Frequency-vs-
System Bus 133 MHzvs-
Max TDP31 Wvs73 W
Lithography130 nmvs-
Bit Width32 Bitvs-
Voltage Range1.5V KBvs-
Max Temperature69°Cvs-
Virtualization Technologynovsno
Comparison

CPU Cache and Memory

L1 Cache Size32 KBvs-
L2 Cache Size256 KBvs-
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.Celeron D 320 is a cheap CPU with very limited performance (only one core) and high power consumption.
The performance isn't enough to play most of today's games at decent settings.