ATI Radeon HD 4890 vs AMD Radeon HD 6870

VS

ATI Radeon HD 4890

AMD Radeon HD 6870

We compared two Desktop platform GPUs: 1024MB VRAM Radeon HD 4890 and 1024MB VRAM Radeon HD 6870 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 6870 's Advantages

Released 1 years and 6 months late

Larger VRAM bandwidth (134.4GB/s vs 124.8GB/s)

320 additional rendering cores

Lower TDP (151W vs 190W)

Score

Benchmark

FP32 (float)

Radeon HD 4890

1.36 TFLOPS

Radeon HD 6870 +48%

2.016 TFLOPS

Radeon HD 4890

VS

Radeon HD 6870

Graphics Card

Apr 2009

Release Date

Oct 2010

Radeon R700

Generation

Northern Islands

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

975 MHz

Memory Clock

1050 MHz

Memory

1024MB

Memory Size

1024MB

GDDR5

Memory Type

GDDR5

256bit

Memory Bus

256bit

124.8GB/s

Bandwidth

134.4GB/s

Render Config

10

Compute Units

14

-

800

Shading Units

1120

40

TMUs

56

16

ROPs

32

-

16 KB (per CU)

L1 Cache

8 KB (per CU)

256 KB

L2 Cache

512 KB

-

Theoretical Performance

13.60 GPixel/s

Pixel Rate

28.80 GPixel/s

34.00 GTexel/s

Texture Rate

50.40 GTexel/s

-

1360 GFLOPS

FP32 (float)

2.016 TFLOPS

272.0 GFLOPS

FP64 (double)

-

Board Design

190W

TDP

151W

450 W

Suggested PSU

450 W

2x DVI 1x S-Video

Outputs

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

2x 6-pin

Power Connectors

2x 6-pin

Graphics Processor

RV790

GPU Name

Barts

RV790 XT (215-0758016)

GPU Variant

Barts XT (215-0798000)

TeraScale

Architecture

TeraScale 2

TSMC

Foundry

TSMC

55 nm

Process Size

40 nm

0.959 billion

Transistors

1.7 billion

282 mm²

Die Size

255 mm²

Graphics Features

10.1 (10_1)

DirectX

11.2 (11_0)

3.3

OpenGL

4.4

1.1

OpenCL

1.2

N/A

Vulkan

N/A

-

4.1

Shader Model

5.0

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