Select any two CPUs for comparison
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Gaming Performance Comparison

Recommended System Requirements
Game Celeron 877 1.4 GHz Celeron B815
Cyberpunk 2077 613% 572%
Call of Duty Warzone 522% 486%
Minecraft: Dungeons 613% 572%
Valorant 330% 305%
Grand Theft Auto VI 1118% 1049%
Assassins Creed: Valhalla 798% 747%
Doom Eternal 898% 841%
Maneater 613% 572%
Mount and Blade 2: Bannerlord 1030% 965%
Microsoft Flight Simulator 627% 585%

In terms of overall gaming performance, the Intel Celeron B815 is marginally better than the Intel Celeron 877 1.4 GHz 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 Celeron B815, and so they are likely to have similar levels of support, and similarly optimized performance when running the latest games.

The Celeron 877 1.4 and the Celeron B815 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 Celeron 877 1.4 and the Celeron B815 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 Celeron 877 1.4 and the Celeron B815 are from the same family of CPUs, and thus their clock speeds are directly comparable. With this in mind, it is safe to say that with a 0.2 GHz faster base clock rate, the Celeron B815 manages to provide slightly better performance than the Celeron 877 1.4.

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 Celeron 877 1.4 and the Celeron B815 have the same L2 cache size, and the same L3 cache size, so in terms of cache-related gaming performance, we have to look back to the clock rate, where the Celeron B815 wins out.

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 Celeron 877 1.4 has a 18 Watt lower Maximum TDP than the Celeron B815 (though they were created with the same size 32 nm manufacturing technology). What this means is the Celeron 877 1.4 will consume slightly less power and consequently produce less heat, enabling more prolonged computational tasks with fewer adverse effects. This will lower your yearly electricity bill slightly, as well as prevent you from having to invest in extra cooling mechanisms (unless you overclock).

CPU Core Details

CPU CodenameSandy BridgeSandy Bridge
MoBo SocketBGA 1023rPGA 988A / B / Socket G1 / G2
Notebook CPUyesyes
Release Date01 Jul 201201 Jan 2012
CPU LinkGD LinkGD Link
Approved

CPU Technical Specifications

CPU Cores2vs2
Clock Speed1.4 GHzvs1.6 GHz
Turbo Frequency-vs-
Max TDP17 Wvs35 W
Lithography32 nmvs32 nm
Bit Width-vs-
Virtualization Technologynovsno
Comparison

CPU Cache and Memory

L1 Cache Size64 KBvs64 KB
L2 Cache Size512 KBvs512 KB
L3 Cache Size2 MBvs2 MB
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 ReviewIntel 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.
Celeron B815 is a cheap entry-level CPU based on the Sandy Bridge architecture.
Most of the Sandy Bridge features are deactivated. Celeron B815 features integrated graphics called Intel HD 2000 clocked at 650 MHz, that goes up to 1050MHz, in Turbo mode. The memory controller supports DDR3-1066 and DDR3-1333 memory types.
Its gaming performance is limited and not enough to run all of today's games at high settings fluently.