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Home » CPU
A8-3870K vs. Core i3-2105 CPU Review
Author: Gabriel Torres
Type: Reviews Last Updated: January 18, 2012
Page: 2 of 18
The Reviewed CPUs

In the tables below, we compare the main features of the CPUs included in our review. The CPUs from Intel support the SSE4 instruction set (both SSE4.1 and SSE4.2), which is not available on the AMD CPUs included in our review. The Intel CPUs included in our review are dual-core, but since they support Hyper-Threading (HT) technology, which simulates one additional core per CPU physical core, the operating system “sees” this CPU as having four cores.

CPU

Cores

HT

SSE4

IGP

Internal Clock

Turbo Clock

Base Clock

Core

Tech.

TDP

Socket

Price

A8-3850

4

No

No

Yes

2.9 GHz

No

100 MHz

Stars

32 nm

100 W

FM1

USD 140

A8-3870K

4

No

No

Yes

3.0 GHz

No

100 MHz

Stars

32 nm

100 W

FM1

USD 145

Core i3-2100

2

Yes

Yes

Yes

3.1 GHz

No

100 MHz

SandyBridge

32 nm

65 W

1155

USD 125

Core i3-2105

2

Yes

Yes

Yes

3.1 GHz

No

100 MHz

Sandy Bridge

32 nm

65 W

1155

USD 135

Prices were researched at Newegg.com on the day we published this review. TDP stands for Thermal Design Power and states the maximum amount of heat the CPU can dissipate. The CPU cooler must be capable of dissipating at least this amount of heat.

Below you can see the memory configuration for each CPU. During our review, we used DDR3-1866 memory modules.

CPU

L1 Cache

L2 Cache

L3 Cache

Memory Support

Memory Channels

A8-3850

64 KB + 64 KB per core

1 MB per core

No

Up to DDR3-1866

Two

A8-3870K

64 KB + 64 KB per core

1 MB per core

No

Up to DDR3-1866

Two

Core i3-2100

32 KB + 32 KB per core

256 kB per core

3 MB total

Up to DDR3-1333

Two

Core i3-2105

32 KB + 32 KB per core

256 kB per core

3 MB total

Up to DDR3-1333

Two

Below we have a quick comparison of the video engine of the CPUs.

CPU

Video Engine

DirectX

Clock

Cores

A8-3850

Radeon HD 6550D

11

600 MHz

400

A8-3870K

Radeon HD 6550D

11

600 MHz

400

Core i3-2100

Intel HD 2000

10.1

850 MHz

6

Core i3-2105

Intel HD 3000

10.1

850 MHz

12

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