AMD Radeon HD 6870 1600SP Edition vs AMD Radeon HD 8870 OEM

VS

AMD Radeon HD 6870 1600SP Edition AMD Radeon HD 8870 OEM

We compared two Desktop platform GPUs: 1024MB VRAM Radeon HD 6870 1600SP Edition and 2GB VRAM Radeon HD 8870 OEM to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 6870 1600SP Edition 's Advantages

320 additional rendering cores

AMD Radeon HD 8870 OEM 's Advantages

More VRAM (2GB vs 1GB)

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

Score

Benchmark

FP32 (float)

Radeon HD 6870 1600SP Edition +6%

2.72 TFLOPS

Radeon HD 8870 OEM

2.56 TFLOPS

Radeon HD 6870 1600SP Edition

VS

Radeon HD 8870 OEM

Graphics Card

Jan 2013

Release Date

Jan 2013

Northern Islands

Generation

Sea Islands

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

Base Clock

-

Boost Clock

-

1050 MHz

Memory Clock

1200 MHz

Memory

1024MB

Memory Size

2GB

GDDR5

Memory Type

GDDR5

256bit

Memory Bus

256bit

134.4GB/s

Bandwidth

153.6GB/s

Render Config

-

SM Count

-

20

Compute Units

20

1600

Shading Units

1280

80

TMUs

80

32

ROPs

32

-

Tensor Cores

-

RT Cores

-

8 KB (per CU)

L1 Cache

16 KB (per CU)

512 KB

L2 Cache

512 KB

Theoretical Performance

27.20 GPixel/s

Pixel Rate

32.00 GPixel/s

68.00 GTexel/s

Texture Rate

80.00 GTexel/s

-

FP16 (half)

-

2.720 TFLOPS

FP32 (float)

2.560 TFLOPS

544.0 GFLOPS

FP64 (double)

160.0 GFLOPS

Graphics Processor

Cypress

GPU Name

Pitcairn

Cypress XT (215-0735033)

GPU Variant

Pitcairn XT (215-0828047)

TeraScale 2

Architecture

GCN 1.0

TSMC

Foundry

TSMC

40 nm

Process Size

28 nm

2.154 billion

Transistors

2.8 billion

334 mm²

Die Size

212 mm²

Board Design

175W

TDP

175W

450 W

Suggested PSU

450 W

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

Outputs

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

2x 6-pin

Power Connectors

2x 6-pin

Graphics Features

11.2 (11_0)

DirectX

12 (11_1)

4.4

OpenGL

4.6

1.2

OpenCL

1.2

N/A

Vulkan

1.2

-

CUDA

-

5.0

Shader Model

5.1

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