Select any two CPUs for comparison
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Gaming Performance Comparison

Recommended System Requirements
Game Celeron B820 Core i7-620UE 2-Core 1.06GHz
Cyberpunk 2077 498% 303%
Assassins Creed: Valhalla 704% 442%
Call of Duty: Black Ops Cold War 479% 290%
Watch Dogs Legion 704% 442%
FIFA 21 459% 277%
Microsoft Flight Simulator 577% 356%
Godfall 1054% 678%
Grand Theft Auto VI 882% 562%
World of Warcraft: Shadowlands 829% 526%
Genshin Impact 352% 205%

In terms of overall gaming performance, the Intel Core i7-620UE 2-Core 1.06GHz is noticeably better than the Intel Celeron B820 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 B820 was released over a year more recently than the Core i7-620UE 2-Core, and so the Celeron B820 is likely to have better levels of support, and will be more optimized for running the latest games.

The Celeron B820 and the Core i7-620UE 2-Core 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 B820 and the Core i7-620UE 2-Core 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 B820 and Core i7-620UE 2-Core 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 B820 has a 0.64 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 .

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 B820 and the Core i7-620UE 2-Core have the same L2 cache size, but the Core i7-620UE 2-Core has a 2 MB bigger L3 cache, so in this area, it wins out over the Celeron B820.

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 i7-620UE 2-Core has a 17 Watt lower Maximum TDP than the Celeron B820 (though they were created with the same size 32 nm manufacturing technology). What this means is the Core i7-620UE 2-Core 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 BridgeArrandale
MoBo SocketrPGA 988A / B / Socket G1 / G2BGA 1288
Notebook CPUyesyes
Release Date29 Jul 201207 Jan 2010
CPU LinkGD LinkGD Link
Approved

CPU Technical Specifications

CPU Cores2vs2
CPU Threads-vs4
Clock Speed1.7 GHzvs1.06 GHz
Turbo Frequency-vs2.133 GHz
Max TDP35 Wvs18 W
Lithography32 nmvs32 nm
Bit Width-vs64 Bit
Max Temperature-vs105°C
Virtualization Technologynovsno
Comparison

CPU Cache and Memory

L1 Cache Size128 KBvs128 KB
L2 Cache Size512 KBvs512 KB
L3 Cache Size2 MBvs4 MB
Max Memory Size-vs8 GB
Memory Channels-vs2
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 ReviewCeleron B820 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 650MHz 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.
Core i7-620UE 2-Core 1.06GHz is an ultra energy efficient mobile CPU based on the 32nm, Nehalem architecture.

It offers 2 Physical Cores (4 Logical), initially clocked at 1.067GHz, which may go up to 2.133GHz and 4MB of L3 Cache.
Among its many features, HyperThreading, Turbo Boost and Virtualization are activated.

The processor integrates very weak Graphics called Intel HD i7 620UE, with 10 Execution Units, initially clocked at 166MHz and that go up to 500MHz, in Turbo Mode which share the L2 Cache and system RAM with the processor.
Both the processor and integrated graphics have a rated board TDP of 18W.

Its performance is below the average and so most demanding games will not run optimally.