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Intel Core i3-2120 vs Pentium G645

Mini Review

Intel Core i3-2120 advantages



Intel Core i3-2120
  • The CPU is 13% faster in single-threaded applications.
  • Multi-threaded performance of this microprocessor is better. In some tests, it is up to 48% faster.
  • Memory performance of the i3-2120 is better.
  • The CPU features AVX instructions, that were introduced in the recent past. These extensions are not broadly used by programs yet, but their support should improve in future apps.

Intel Pentium G645 advantages



Intel Pentium G645
  • In graphics tasks and games, the processor has 1% higher performance.

i3-2120 vs G645 performance comparison

The charts below demonstrate performance of Core i3-2120 and Pentium G645 microprocessors in different program types. The numbers for 'Single-threaded performance', 'Multi-threaded performance' and 'Integrated Graphics performance' charts are calculated as an average of several related benchmarks, that you can see in the "Benchmarks" tab. As a result, performance in individual benchmarks may be better or worse than what you see in the charts on this page. We also averaged the results for task type specific benchmarks and all-around performance benchmarks, and displayed them in the 'Overall performance' chart.
Single-threaded performance
2
1.6
1.2
0.8
0.4
0
 
 
1.13
 
1
 
 
Higher is better
Multi-threaded performance
2
1.6
1.2
0.8
0.4
0
 
 
1.35
 
1
 
 
Higher is better
Memory-intensive applications
2
1.6
1.2
0.8
0.4
0
 
 
1.51
 
1
 
 
Higher is better
Integrated Graphics performance
2
1.6
1.2
0.8
0.4
0
 
 
1
 
1.01
 
 
Higher is better
Overall performance
2
1.6
1.2
0.8
0.4
0
 
 
1.21
 
1
 
 
Higher is better
 

  - Intel Core i3-2120       - Intel Pentium G645

Exhaustive list of benchmarks, that show difference in performance between i3-2120 and Intel Pentium G645 in various types of applications, can be found in the "Benchmarks" tab.


i3-2120 vs G645 power consumption comparison

Thermal Design Power
80
64
48
32
16
0
 
 
65W
 
65W
 
 
Lower is better
 

Detailed side by side comparison of Intel i3-2120 vs Pentium G645 specs can be found in the "Specifications" tab. Even more detailed comparison of low level features of both CPUs you will find in the "CPUIDs" tab.


Pros and Cons summary

Core i3-2120 Pentium G645
General recommendations:
Faster overall,
Supports AVX instructions
  General recommendations:
A bit faster in graphics programs

Drawbacks:

A bit slow in games and graphics applications
 

Drawbacks:

Rather slow,
Lacks some instructions

Similar processors

Core i3-2120 Pentium G645
 

Similar microprocessors use the same socket and architecture as i3-2120 and Pentium G645, however their performance and other characteristics are slightly different.

Jump to:
  • Benchmarks
  • CPUIDs
  • Comments
 

More comparisons

Compare Intel Core i3-2120 with...

Other Pentium Dual-Core CPU:

Any CPU:


Compare Intel Pentium G645 with...

Other Core i3 CPU:

Any CPU:


Note: To see differences with any CPU, type in any combination of the following into the "Any CPU" field: manufacturer name, full or partial family name, model number, part number, core name, socket name, operating frequency, bus speed (must have FSB suffix), and the last level cache. Here are some valid searches:

  i5-3570K
  Intel Celeron 2 GHz
  Sandy Bridge
  Pentium 4 800FSB
  AMD 3.3GHz 8MB

Specifications

Please visit Intel Core i3-2120 and Intel Pentium G645 pages for more complete specifications of both microprocessors.

 Intel Core i3-2120Intel Pentium G645
Market segmentDesktop
ManufacturerIntel
FamilyCore i3Pentium Dual-Core
Basic details
Model numberi3-2120G645
CPU part numberCM8062301044204CM8062301262601
Box part numberBX80623I32120
BXC80623I32120
BX80623G645
BXC80623G645
Introduction dateFebruary 20, 2011September 2, 2012
 
CPU features
Core nameSandy Bridge
MicroarchitectureSandy Bridge
Technology (micron)0.032
Data width (bits)64
SocketSocket 1155
Frequency (MHz)33002900
Clock Multiplier3329
L1 cache64 KB (code) / 64 KB (data)
L2 cache (KB)512
L3 cache (KB)3072
Max temperature (°C)69.1
TDP (Watt)65
Cores2
Threads42
Multiprocessing1
 
Instruction set extensions
AMD64 / EM64T 64-bit technology+
AVX / Advanced Vector Extensions+-
MMX+
SSE+
SSE2+
SSE3+
SSE4.1+
SSE4.2+
SSSE3 / Supplemental SSE3+
 
Supported technologies
Hyper-Threading+-
PowerNow! / Enhanced SpeedStep+
Virtualization+
Virus Protection / Execute Disable bit+
 
Integrated Graphics
GPU TypeHD 2000HD (Sandy Bridge)
Base frequency (MHz)850
Maximum frequency (MHz)1100
 
Integrated Memory Controller(s)
The number of controllers1
Memory channels2
Supported memoryDDR3-1066, DDR3-1333DDR3-1066
Notes:

Rows with different specifications or features are highlighted.

For detailed specifications of "Intel Core i3-2120" or "Intel Pentium G645" parts please click on the links in the table header.

Benchmarks

System setup

Below is a partial set of Intel Core i3-2120 and Pentium G645 benchmarks from our CPU benchmark database. Both microprocessors were tested on ASUS P8H61-M motherboard with 2 GB dual-channel Corsair CM3X1024-1333C9 DDR3 memory, and Integrated on-chip Intel Sandy Bridge graphics. For different system configurations please see tests of Core i3-2120 and Pentium G645 CPUs in our benchmark database.

All tests were performed at default frequency and voltage, using manufacturer's stock fan/heatsink. None of the components were overclocked. Motherboard BIOS options were left at default settings.

The results of all benchmarks are broken into four categories: multi-threaded, single-threaded, memory intensive and graphics / gaming.


Core i3-2120 vs Pentium G645 single-threaded benchmarks

Single-threaded benchmarks run on a single CPU core, and do not depend on such features as the number of cores, or Hyper-Threading technology. Additionally, they do not utilize on-chip caches, dedicated to other cores.


    Intel Core i3-2120           Intel Pentium G645

3DMark03 CPU score benchmark

Uses DirectX software vertex shader to run Wings of Fury and Trolls' Lair games, and calculates a 3DMark03 CPU score based on averaged number of frames per second, achieved by the CPU/GPU combination.
100%
97.4%

CINEBENCH R10 CPU score (1 core) benchmark

Measures performance of a single-core rendering of a photo-realistic 3D image using CINEMA 4D software engine.
100%
88.5%

FLAC encoding - single process benchmark

Reports the number of songs, converted by a single CPU core from WAV to FLAC format using the best possible compression.
100%
87.8%

H.264 video encoding - single process benchmark

Measures the number of frames, converted by one CPU thread from MPEG2 format to H.264 format using high quality settings.
100%
88.3%

LAME MP3 encoding - single process benchmark

Reports the number of MP3 songs, encoded by one CPU core per one minute.
100%
87.9%

    Intel Core i3-2120           Intel Pentium G645

PCMark2002 CPU score benchmark

100%
88.4%

Super PI (1M) benchmark

Measures time, required to calculate the first 1 million digits after the decimal point in the number Pi.
100%
88.5%

XVid video encoding - single process benchmark

Reports how many frames per second can be transcoded by a single CPU core from MPEG2 to XVid (MPEG4) format, utilizing single-pass conversion method.
100%
88.6%


Core i3-2120 vs Pentium G645 multi-threaded benchmarks

Multi-threaded benchmarks utilize all CPU cores and other on-chip resources (on-chip caches, internal buffers, etc). Intel's Hyper-Threading feature also helps to improve multi-threading performance.


    Intel Core i3-2120           Intel Pentium G645

3DMark06 CPU score benchmark

Estimates processor performance based on how fast it runs such CPU-intensive code as game logic, physics and pathfinding AI. The test requires DirectX 9.0.
100%
75.1%

Apache web server - dynamic pages benchmark

Shows an average number of dynamic HTML pages served per second by local instance of Apache 1.3.41 web server. The test has much greater error margin than other tests.
100%
95.7%

Apache web server - static pages benchmark

Shows an average number of very simple static HTML pages served per second by local Apache 1.3.41 web server. The test has much greater error margin than other tests.
100%
63.0%

Blowfish encryption benchmark

Reports encryption speed of pre-defined 32KB text block. The data is encrypted using Blowfish algorithm.
100%
77.7%

CINEBENCH R10 CPU score benchmark

Measures performance of multi-core rendering of a photo-realistic 3D image using CINEMA 4D software engine.
100%
76.3%

    Intel Core i3-2120           Intel Pentium G645

CINEBENCH R10 render time (seconds) benchmark

Measures time taken to render a photo-realistic 3D image using CINEMA 4D software engine.
100%
76.3%

CrystalMark ALU benchmark

100%
66.1%

CrystalMark FPU benchmark

100%
61.7%

Euler3D benchmark

100%
84.5%

FLAC encoding - multiple processes benchmark

Reports the number of songs, converted from WAV to FLAC format by all CPU cores using the best possible compression.
100%
75.3%

    Intel Core i3-2120           Intel Pentium G645

Fritz Chess Benchmark benchmark

100%
68.7%

H.264 video encoding - multiple processes benchmark

Measures the number of frames, converted by all logical processors from MPEG2 format to H.264 format using single-pass method and high quality settings.
100%
71.7%

H.264 video encoding - multithreaded benchmark

Measures the number of frames, converted by all logical processors from MPEG2 format to H.264 format using multi-threading system calls, dual-pass method and high quality settings.
100%
70.9%

LAME MP3 encoding - multiple processes benchmark

Reports the number of MP3 songs, encoded by all CPU cores per one minute.
100%
67.8%

PCMark05 CPU score benchmark

100%
81.2%

    Intel Core i3-2120           Intel Pentium G645

PCMark05 score benchmark

100%
92.1%

Sandra Dhrystone (MIPS) benchmark

Runs Dhrystone test on all cores, and reports estimated integer performance in MIPS (Millions of Instructions Per Second).
100%
78.5%

Sandra MultiMedia Floating Point (it/s) benchmark

100%
54.7%

Sandra MultiMedia Integer (it/s) benchmark

100%
74.2%

Sandra Whetstone (MFLOPS) benchmark

Runs Whetstone test on all cores, and reports estimated floating-point performance in MFLOPS (Millions of Floating-Point Operations Per Second).
100%
51.3%

    Intel Core i3-2120           Intel Pentium G645

Sandra Whetstone SSE2 (MFLOPS) benchmark

Runs SSE2-enabled Whetstone test on all cores, and reports estimated floating-point performance in MFLOPS (Millions of Floating-Point Operations Per Second).
100%
50.0%

XVid video encoding - multiple processes benchmark

Reports how many frames per second can be transcoded by all CPU cores from MPEG2 to XVid (MPEG4) format, utilizing single-pass conversion method.
100%
71.3%

wPrime v1.55 (32M) benchmark

wPrime benchmark measures time taken to calculate square roots of numbers from 1 to 33554431.
100%
69.2%


Core i3-2120 vs Pentium G645 graphics benchmarks

Graphics benchmarks depend on the type of integrated or discrete graphics adapter, and to less extent on the processor performance. Because these benchmarks are synthetic, they may not truly represent gaming performance. However, they still can be used to estimate whether one processor will perform faster or slower than another CPU in games and other 3D tasks.


    Intel Core i3-2120           Intel Pentium G645

3DMark03 game score benchmark

Measures graphics and 3D game performance of discrete and integrated GPUs using 4 different game simulations, that have varying level of DirectX support from version 7 to version 9.
100%
99.5%

3DMark06 3DMark score benchmark

Measures 3D graphics and game performance of CPU/GPU combination by running 4 game simulations, that make extensive use of DirectX 9.0/9.0C capabilities.
100%
99.1%

3DMark2001 score benchmark

Runs a series of game simulations and feature tests to measure graphics and 3D game performance of discrete and integrated GPUs. It utilizes a single CPU core, and it is compatible with DirectX 8 and later APIs.
100%
97.8%

CINEBENCH R10 OpenGL score benchmark

100%
96.8%

PCMark05 Graphics score benchmark

100%
97.6%


Core i3-2120 vs Pentium G645 memory performance

Memory-intensive tests or programs move large amounts of data to/from memory, and they depend more on memory throughput and the size of on-chip caches, rather than on CPU integer/FP/SIMD performance.


    Intel Core i3-2120           Intel Pentium G645

7Zip compressing/decompressing speed (1 thread) benchmark

100%
78.9%

CrystalMark Memory benchmark

100%
93.2%

PCMark05 Memory score benchmark

100%
67.8%

PCMark2002 Memory score benchmark

100%
90.5%

WinRAR compressing/decompressing speed benchmark

100%
64.7%

CPUIDs

The table below compares two random CPUID records for Intel Core i3-2120 and Intel Pentium G645 microprocessors, that were submitted to our CPUID database. Please note that different steppings of Intel processors, identified by S-spec numbers or CPUID, may have slightly different features. For that reason the comparison table below only applies to CPUs with specific S-Spec number / CPUID.

  CPUID 1 CPUID 2
ManufacturerIntel
CPU FamilyCore i3Pentium Dual-Core
Model / Processor Numberi3-2120G645
Frequency3310 MHz2909 MHz
CWID version0.40.5
Part numberCM8062301044204CM8062301262601
S-Spec / Stepping CodeSR05YSR0RS
 
General information
VendorGenuineIntel
Processor name (BIOS) Intel(R) Core(TM) i3-2120 CPU @ 3.30GHz Intel(R) Pentium(R) CPU G645 @ 2.90GHz
Cores2
Logical processors42
Processor typeOriginal OEM Processor
CPUID signature206A7
Family 6 (06h)
Model42 (02Ah)
Stepping 7 (07h)
TLB/Cache details64-byte Prefetching
Data TLB0: 2-MB or 4-MB pages, 4-way set associative, 32 entries
Data TLB: 4-KB Pages, 4-way set associative, 64 entries
Instruction TLB: 4-KB pages, 4-way set associative, 64 entries
L2 TLB: 1-MB, 4-way set associative, 64-byte line size
Shared 2nd-level TLB: 4 KB pages, 4-way set associative, 512 entries
64-byte Prefetching
Data TLB0: 2-MB or 4-MB pages, 4-way set associative, 32 entries
Data TLB: 4-KB Pages, 4-way set associative, 64 entries
Instruction TLB: 4-KB Pages, 4-way set associative, 128 entries
L2 TLB: 1-MB, 4-way set associative, 64-byte line size
Shared 2nd-level TLB: 4 KB pages, 4-way set associative, 512 entries
 
Cache
L1 data: Associativity8-way set associative
L1 data: CommentsDirect-mapped
L1 data: Line size64 bytes
L1 data: Size2 x 32 KB
L1 instruction: Associativity8-way set associative
L1 instruction: CommentsDirect-mapped
L1 instruction: Line size64 bytes
L1 instruction: Size2 x 32 KB
L2: Associativity8-way set associative
L2: CommentsNon-inclusive|Direct-mapped
L2: Line size64 bytes
L2: Size2 x 256 KB
L3: Associativity12-way set associative
L3: CommentsInclusive|Shared between all cores
L3: Line size64 bytes
L3: Size3 MB
 
Instruction set extensions
AVX+-
MMX+
SSE+
SSE2+
SSE3+
SSE4.1+
SSE4.2+
SSSE3+
 
Additional instructions
CLFLUSH+
CMOV+
CMPXCHG16B+
CMPXCHG8B+
FXSAVE/FXRSTORE+
MONITOR/MWAIT+
PCLMULDQ+
POPCNT+
RDTSCP+
SYSENTER/SYSEXIT+
XSAVE / XRESTORE states+
 
Major features
64-bit / Intel 64+
Enhanced SpeedStep+
Hyper-Threading Technology+-
Intel Virtualization+
NX bit/XD-bit+
On-chip Floating Point Unit+
 
Other features
36-bit page-size extensions+
64-bit debug store+
Advanced programmable interrupt controller+
CPL qualified debug store+
Debug store+
Debugging extensions+
Digital Thermal Sensor capability+
LAHF / SAHF support in 64-bit mode+
Machine check architecture+
Machine check exception+
Memory-type range registers+
Model-specific registers+
Page attribute table+
Page global extension+
Page-size extensions (4MB pages)+
Pending break enable+
Perfmon and Debug capability+
Physical address extensions+
Power Limit Notification capability+
Process context identifiers+
Self-snoop+
TSC rate is ensured to be invariant across all states+
Thermal monitor+
Thermal monitor 2+
Thermal monitor and software controlled clock facilities+
Time stamp counter+
Timestamp counter deadline+
Virtual 8086-mode enhancements+
xTPR Update Control+
+ - feature is supported
- - feature is not supported
Features, not supported by all processors in the table, are not displayed

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