AMD Radeon HD 8870 OEM vs AMD Radeon HD 6870 X2

VS

AMD Radeon HD 8870 OEM

AMD Radeon HD 6870 X2

We compared two Desktop platform GPUs: 2GB VRAM Radeon HD 8870 OEM and 1024MB VRAM Radeon HD 6870 X2 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 8870 OEM 's Advantages

Released 1 years and 6 months late

More VRAM (2GB vs 1024GB)

Larger VRAM bandwidth (153.6GB/s vs 134.4GB/s)

160 additional rendering cores

Lower TDP (175W vs 300W)

Score

Benchmark

FP32 (float)

Radeon HD 8870 OEM +26%

2.56 TFLOPS

Radeon HD 6870 X2

2.016 TFLOPS

Radeon HD 8870 OEM

VS

Radeon HD 6870 X2

Graphics Card

Jan 2013

Release Date

Jul 2011

Sea Islands

Generation

Northern Islands

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

1200 MHz

Memory Clock

1050 MHz

Memory

2GB

Memory Size

1024MB

GDDR5

Memory Type

GDDR5

256bit

Memory Bus

256bit

153.6GB/s

Bandwidth

134.4GB/s

Render Config

20

Compute Units

14

-

1280

Shading Units

1120

80

TMUs

56

32

ROPs

32

-

16 KB (per CU)

L1 Cache

8 KB (per CU)

512 KB

L2 Cache

512 KB

-

Theoretical Performance

32.00 GPixel/s

Pixel Rate

28.80 GPixel/s

80.00 GTexel/s

Texture Rate

50.40 GTexel/s

-

2.560 TFLOPS

FP32 (float)

2.016 TFLOPS

160.0 GFLOPS

FP64 (double)

-

Board Design

175W

TDP

300W

450 W

Suggested PSU

700 W

1x DVI 1x HDMI 1.4a 2x mini-DisplayPort 1.2

Outputs

2x DVI 1x HDMI 1.3a 2x mini-DisplayPort 1.1

2x 6-pin

Power Connectors

-

Graphics Processor

Pitcairn

GPU Name

Barts

Pitcairn XT (215-0828047)

GPU Variant

Barts XT (215-0798000)

GCN 1.0

Architecture

TeraScale 2

TSMC

Foundry

TSMC

28 nm

Process Size

40 nm

2.8 billion

Transistors

1.7 billion

212 mm²

Die Size

255 mm²

Graphics Features

12 (11_1)

DirectX

11.2 (11_0)

4.6

OpenGL

4.4

1.2

OpenCL

1.2

Vulkan

N/A

-

5.1

Shader Model

5.0

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