Select any two CPUs for comparison
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Gaming Performance Comparison

Recommended System Requirements
Game Xeon Processor 3.0GHz Pentium D 950 3.4GHz
Red Dead Redemption 2 1591% 1405%
Call of Duty: Modern Warfare 1154% 1016%
Zombieland: Double Tap - Road Trip 1591% 1405%
Cyberpunk 2077 1337% 1179%
Microsoft Flight Simulator 1739% 1537%
Borderlands 3 1591% 1405%
FIFA 20 1110% 977%
The Outer Worlds 1380% 1217%
eFootball PES 2020 1291% 1138%
Ghost Recon Breakpoint 1768% 1562%

In terms of overall gaming performance, the Intel Pentium D 950 3.4GHz is marginally better than the Intel Xeon Processor 3.0GHz 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 Pentium D 950 was released less than a year after the Xeon Processor 3.0GHz, and so they are likely to have similar levels of support, and similarly optimized performance when running the latest games.

The Pentium D 950 has 1 more core than the Xeon Processor 3.0GHz. However, while the Pentium D 950 will probably perform better than the Xeon Processor 3.0GHz, both CPUs are likely to struggle with the latest games, and will almost certainly bottleneck high-end graphics cards. This should not affect games that are a few years old, and even the latest games should at least be playable on very low settings, as only recently have game developers begun to harness the power of multiple cores.

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 Xeon Processor 3.0GHz and Pentium D 950 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 Pentium D 950 has a 0.4 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 enough that it possibly indicates the superiority of the Pentium D 950.

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 D 950 has a 2048 KB bigger L2 cache than the Xeon Processor 3.0GHz, but neither of the CPUs have L3 caches, so the Pentium D 950 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 Xeon Processor 3.0GHz has a 20 Watt lower Maximum TDP than the Pentium D 950. However, the Pentium D 950 was created with a 25 nm smaller manufacturing technology. Overall, by taking both into account, the Pentium D 950 is likely the CPU with the lower heat production and power requirements, by quite a wide margin.

CPU Core Details

CPU CodenameIrwindalePresler
MoBo SocketSocket 604LGA 775/ Socket T
Notebook CPUnono
Release Date14 Feb 200505 Jan 2006
CPU LinkGD LinkGD Link
Approved

CPU Technical Specifications

CPU Cores1vs2
Clock Speed3 GHzvs3.4 GHz
Turbo Frequency-vs-
System Bus -vs800 MHz
Max TDP110 Wvs130 W
Lithography90 nmvs65 nm
Bit Width-vs-
Virtualization Technologynovsno
Comparison

CPU Cache and Memory

L1 Cache Size16 KBvs32 KB
L2 Cache Size2048 KBvs4096 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 Xeon is a brand of multiprocessing- or multi-socket-capable x86 microprocessors from Intel Corporation targeted at the non-consumer workstation, server, and embedded system markets.The last generation of Pentium D branded processors was Presler identified by the product code 80553, and made of two 65 nm-process cores found also in Pentium 4 branded Cedar Mill CPUs. Presler introduced the 'multi-chip module, or MCM, which consisted of two single-core dies placed next to each other on the same substrate package. This allowed Intel to produce these processors at a reduced production cost as a result of higher yields. Presler was supported by the same chipsets as Smithfield. It was produced using 65 nm technology similar to Yonah. Presler communicated with the system using an 800 MT/s FSB, and its two cores communicated also using the FSB, just as in Smithfield. Presler also included Intel VT-x (formerly Vanderpool) –although this was limited to the 9x0 models, and not in the 9x5 models– Intel 64, XD bit, and EIST (Enhanced Intel SpeedStep Technology). Presler was released in the first quarter of 2006 with a 2x2 MB Level 2 cache. Its models included 915, 920, 925, 930, 935, 940, 945, 950 and 960 (with a respective 2.8, 2.8, 3.0, 3,0, 3.2, 3.2, 3.4, 3.4, and 3.6 GHz clock frequency).

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