AMD A8 3870K 

Released December, 2011
  • 3 GHz
  • Quad core
  • Unlocked
2.7 Out of 10

CPUBoss Review Our evaluation of the AMD A8 3870K among desktop CPUs (over 75W)

Performance

Benchmark performance using all cores

A8 3870K
2.6
A6 3670K
2.4
PCMark 8 Home 3.0 Accelerated, PassMark and 1 more

Single-core Performance

Individual core benchmark performance

A8 3870K
0.0
A6 3670K
0.0
PassMark (Single Core), Geekbench 3 Single Core and 1 more

Integrated Graphics

Integrated GPU performance for graphics

A8 3870K
1.4
A6 3670K
1.0
Fire Strike

Integrated Graphics (OpenCL)

Integrated GPU performance for parallel computing

A8 3870K
0.4
A6 3670K
n.d.
CompuBench 1.5 Bitcoin mining and 4 more

Performance per Watt

How efficiently does the processor use electricity?

A8 3870K
3.6
A6 3670K
3.6
Fire Strike, CompuBench 1.5 Bitcoin mining and 11 more

Value

Are you paying a premium for performance?

A8 3870K
n.d.
A6 3670K
n.d.
Fire Strike, CompuBench 1.5 Bitcoin mining and 11 more

2.7

CPUBoss Score

Combination of all six facets

A8 3870K
2.7
A6 3670K
2.7

Benchmarks Real world tests of the AMD A8 3870K

CompuBench 1.5 (Bitcoin mining) Data courtesy CompuBench

A8 3870K
46.8 mHash/s
A6 3670K
n.d.

CompuBench 1.5 (T-Rex) Data courtesy CompuBench

A8 3870K
0.62 fps
A6 3670K
n.d.

PCMark 8 Home 3.0 Accelerated Data courtesy FutureMark

A8 3870K
2,346
A6 3670K
2,547

Sky Diver Data courtesy FutureMark

A8 3870K
2,532
A6 3670K
1,740

Cloud Gate Data courtesy FutureMark

A8 3870K
4,726
A6 3670K
3,878

GeekBench 3 (Multi-core) Data courtesy Primate Labs

A8 3870K
5,602
A6 3670K
5,104

GeekBench 3 (Single core) Data courtesy Primate Labs

A8 3870K
1,597
A6 3670K
1,454

GeekBench 3 (AES single core) Data courtesy Primate Labs

A8 3870K
126,200 MB/s
A6 3670K
113,200 MB/s
Athlon II X4 651
125,700 MB/s

Reviews Word on the street for the AMD A8 3870K


8.0

8.0

9.7

Overall

8.8 Out of 10

Specifications Full list of technical specs

summary

Clock speed 3 GHz
Cores Quad core
Socket type FM1
Is unlocked Yes

features

Has a NX bit Yes
Supports trusted computing Yes
Has virtualization support Yes
Instruction set extensions
  1. 3DNow!
  2. AMD-V
  3. AMD64
  4. MMX
  5. SSE
  6. SSE2
  7. SSE3
  8. SSE4a
Supports dynamic frequency scaling Yes

integrated graphics

GPU GPU
Label Radeon™ HD 6550D
Latest DirectX 11.0
Number of displays supported 2
GPU clock speed 600 MHz
Turbo clock speed 600 MHz

memory controller

Memory controller Built-in
Memory type
  1. DDR3-1866
  2. DDR3-1600
  3. DDR3-1333
Channels Dual Channel
Supports ECC No
Maximum bandwidth 29,866.66 MB/s
Maximum memory size 32,768 MB

details

Architecture x86-64
Threads 4 threads
L2 cache 4 MB
L2 cache per core 1 MB/core
Manufacture process 32 nm
Transistor count 1,178,000,000
Max CPUs 1
Die size 228 mm²
Clock multiplier 30
Voltage range 0.45 - 1.41V
Operating temperature Unknown - 72.7°C

overclocking

Overclock popularity 32
Overclock review score 5
Overclocked clock speed 3.56 GHz
Overclocked clock speed (Water) 3.67 GHz
PassMark (Overclocked) 2,107.6
Overclocked clock speed (Air) 3.56 GHz

power consumption

TDP 100W
Annual home energy cost 40.03 $/year
Annual commercial energy cost 138.41 $/year
Performance per watt 1.03 pt/W
Idle power consumption 47W
Peak power consumption 158W

bus

Architecture FSB
Data rate 3,200 MB/s
Transfer rate 3,200 MT/s
Clock speed 100 MHz
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