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Gaming Performance Comparison

Recommended System Requirements
Game Sempron 64 LE-1250 Pentium D 840 3.2GHz
Cyberpunk 2077 1431% 1120%
Assassins Creed: Valhalla 1962% 1543%
Call of Duty: Black Ops Cold War 1384% 1082%
FIFA 21 1332% 1041%
Microsoft Flight Simulator 1635% 1282%
World of Warcraft: Shadowlands 2281% 1797%
Watch Dogs Legion 1962% 1543%
Horizon: Zero Dawn 1635% 1282%
Grand Theft Auto VI 2417% 1905%
Genshin Impact 1060% 824%

In terms of overall gaming performance, the Intel Pentium D 840 3.2GHz is marginally better than the AMD Sempron 64 LE-1250 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 64 LE-1250 was released over a year more recently than the Pentium D 840, and so the Sempron 64 LE-1250 is likely to have better levels of support, and will be more optimized for running the latest games.

The Pentium D 840 has 1 more core than the Sempron 64 LE-1250. However, while the Pentium D 840 will probably perform better than the Sempron 64 LE-1250, 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 Sempron 64 LE-1250 and Pentium D 840 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 840 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 Pentium D 840 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 D 840 has a 1536 KB bigger L2 cache than the Sempron 64 LE-1250, but neither of the CPUs have L3 caches, so the Pentium D 840 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 Sempron 64 LE-1250 has a 85 Watt lower Maximum TDP than the Pentium D 840, and was created with a 25 nm smaller manufacturing technology. What this means is the Sempron 64 LE-1250 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 CodenameSpartaSmithfield
MoBo SocketSocket AM2LGA 775/ Socket T
Notebook CPUnono
Release Date08 Oct 200726 May 2005
CPU LinkGD LinkGD Link
Approved

CPU Technical Specifications

CPU Cores1vs2
Clock Speed2.2 GHzvs3.2 GHz
Turbo Frequency-vs-
System Bus -vs800 MHz
Max TDP45 Wvs130 W
Lithography65 nmvs90 nm
Bit Width-vs-
Virtualization Technologynovsno
Comparison

CPU Cache and Memory

L1 Cache Size128 KBvs32 KB
L2 Cache Size512 KBvs2048 KB
L3 Cache Size-vs-
ECC Memory Supportnovsno
Comparison

CPU Graphics

Graphicsnono

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 ReviewSempron 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.In April 2005, Intel's biggest rival, AMD, had x86 dual-core microprocessors intended for workstations and servers on the market, and was poised to launch a comparable product intended for desktop computers. As a response, Intel developed Smithfield, the first x86 dual-core microprocessor intended for desktop computers, beating AMD's Athlon 64 X2 by a few weeks. Intel first launched Smithfield on April 16, 2005 in the form of the 3.2 GHz Hyper-threading enabled Pentium Extreme Edition 840. On May 26, 2005, Intel launched the mainstream Pentium D branded processor lineup with initial clock speeds of 2.8, 3.0, and 3.2 GHz with model numbers of 820, 830, and 840 respectively. In March 2006, Intel launched the last Smithfield processor, the entry-level Pentium D 805, clocked at 2.66 GHz with a 533 MT/s bus. The relatively cheap 805 was found to be highly overclockable; 3.5 GHz was often possible with good air cooling. Running it at over 4 GHz was possible with water cooling, and at this speed the 805 outperformed the top-of-the-line processors (May 2006) from both major CPU manufacturers (the AMD Athlon 64 FX-60 and Intel Pentium Extreme Edition 965) in many benchmarks including power consumption.