AMD Radeon HD 8670A vs AMD Radeon HD 7870M

VS

AMD Radeon HD 8670A

AMD Radeon HD 7870M

We compared two Mobile platform GPUs: 1024MB VRAM Radeon HD 8670A and 2GB VRAM Radeon HD 7870M to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 8670A 's Advantages

Released 10 months late

AMD Radeon HD 7870M 's Advantages

More VRAM (2GB vs 1024GB)

Larger VRAM bandwidth (64.00GB/s vs 16.00GB/s)

256 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon HD 8670A

0.461 TFLOPS

Radeon HD 7870M +122%

1.024 TFLOPS

Radeon HD 8670A

VS

Radeon HD 7870M

Graphics Card

Feb 2013

Release Date

Apr 2012

All-In-One

Generation

London

Mobile

Type

Mobile

MXM-A (3.0)

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

1000 MHz

Memory Clock

1000 MHz

Memory

1024MB

Memory Size

2GB

DDR3

Memory Type

GDDR5

64bit

Memory Bus

128bit

16.00GB/s

Bandwidth

64.00GB/s

Render Config

6

Compute Units

10

-

384

Shading Units

640

24

TMUs

40

8

ROPs

16

-

16 KB (per CU)

L1 Cache

16 KB (per CU)

128 KB

L2 Cache

256 KB

-

Theoretical Performance

4.800 GPixel/s

Pixel Rate

12.80 GPixel/s

14.40 GTexel/s

Texture Rate

32.00 GTexel/s

-

460.8 GFLOPS

FP32 (float)

1024 GFLOPS

28.80 GFLOPS

FP64 (double)

64.00 GFLOPS

Board Design

45W

TDP

45W

-

No outputs

Outputs

No outputs

-

Graphics Processor

Mars

GPU Name

Heathrow

Mars XT

GPU Variant

Heathrow XT (216-0835033)

GCN 1.0

Architecture

GCN 1.0

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

0.95 billion

Transistors

1.5 billion

77 mm²

Die Size

123 mm²

Graphics Features

12 (11_1)

DirectX

12 (11_1)

4.6

OpenGL

4.6

1.2

OpenCL

1.2

Vulkan

1.2

-

5.1

Shader Model

5.1

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