Select any two CPUs for comparison
VS

Gaming Performance Comparison

Recommended System Requirements
Game Core 2 Duo L2400 1.66GHz Celeron 877 1.4 GHz
Cyberpunk 2077 1179% 613%
Call of Duty Warzone 1016% 522%
Minecraft: Dungeons 1179% 613%
Valorant 671% 330%
Grand Theft Auto VI 2085% 1118%
Assassins Creed: Valhalla 1511% 798%
Doom Eternal 1690% 898%
Maneater 1179% 613%
Mount and Blade 2: Bannerlord 1927% 1030%
Microsoft Flight Simulator 1204% 627%

In terms of overall gaming performance, the Intel Celeron 877 1.4 GHz is noticeably better than the Intel Core 2 Duo L2400 1.66GHz 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 877 1.4 was released less than a year after the Core 2 Duo, and so they are likely to have similar levels of support, and similarly optimized performance when running the latest games.

The Core 2 Duo and the Celeron 877 1.4 both have 2 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 Core 2 Duo and the Celeron 877 1.4 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 Core 2 Duo and Celeron 877 1.4 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 Core 2 Duo has a 0.26 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 Core 2 Duo has a 1536 KB bigger L2 cache than the Celeron 877 1.4, and although the Core 2 Duo does not appear to have an L3 cache, its larger L2 cache means that it wins out 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 Core 2 Duo has a 2 Watt lower Maximum TDP than the Celeron 877 1.4. However, the Celeron 877 1.4 was created with a 33 nm smaller manufacturing technology. Overall, by taking both into account, the Celeron 877 1.4 is likely the CPU with the lower heat production and power requirements, by quite a wide margin.

CPU Core Details

CPU CodenameYonahSandy Bridge
MoBo SocketSocket 479BGA 1023
Notebook CPUyesyes
Release Date22 Jan 200601 Jul 2012
CPU LinkGD LinkGD Link
Approved

CPU Technical Specifications

CPU Cores2vs2
Clock Speed1.66 GHzvs1.4 GHz
Turbo Frequency-vs-
System Bus 667 MHzvs-
Max TDP15 Wvs17 W
Lithography65 nmvs32 nm
Bit Width32 Bitvs-
Voltage Range1.0V - 1.212V KBvs-
Virtualization Technologyyesvsno
Comparison

CPU Cache and Memory

L1 Cache Size64 KBvs64 KB
L2 Cache Size2048 KBvs512 KB
L2 Cache Speed-vs-
L3 Cache Size-vs2 MB
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 Size35mm x 35mmvs-
Revision-vs-
PCIe Revision-vs-
PCIe Configurations-vs-

Gaming Performance Value

Performance Value

CPU Mini Review

Mini ReviewCore 2 is a brand encompassing a range of Intel's consumer 64-bit x86-64 single-, dual-, and quad-core microprocessors based on the Core microarchitecture. The single- and dual-core models are single-die, whereas the quad-core models comprise two dies, each containing two cores, packaged in a multi-chip module. The introduction of Core 2 relegated the Pentium brand to the mid-range market, and reunified laptop and desktop CPU lines, which previously had been divided into the Pentium 4, Pentium D, and Pentium M brands.
The Core microarchitecture returned to lower clock rates and improved the usage of both available clock cycles and power when compared with the preceding NetBurst microarchitecture of the Pentium 4/D-branded CPUs. The Core microarchitecture provides more efficient decoding stages, execution units, caches, and buses, reducing the power consumption of Core 2-branded CPUs while increasing their processing capacity. Intel's CPUs have varied widely in power consumption according to clock rate, architecture, and semiconductor process, shown in the CPU power dissipation tables.
Intel Celeron 877 1.4GHz is a cheap dual-core CPU for small laptops based on the Sandy Bridge architecture but with most of its features disabled.
It features Integrated Graphics clocked at 350MHz that go up to 1000MHz in Turbo mode and the memory controller supports DDR3-1066 and DDR3-1333.
Despite its puny structure, the performance isn't as horrible as it may sound and its power consumption is extremely low.