AMD Radeon HD 6850 X2 vs ATI Radeon HD 4890

VS

AMD Radeon HD 6850 X2

ATI Radeon HD 4890

We compared two Desktop platform GPUs: 2GB VRAM Radeon HD 6850 X2 and 1024MB VRAM Radeon HD 4890 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 6850 X2 's Advantages

Released 2 years and 5 months late

More VRAM (2GB vs 1024GB)

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

160 additional rendering cores

ATI Radeon HD 4890 's Advantages

Lower TDP (190W vs 254W)

Score

Benchmark

FP32 (float)

Radeon HD 6850 X2 +12%

1.536 TFLOPS

Radeon HD 4890

1.36 TFLOPS

Radeon HD 6850 X2

VS

Radeon HD 4890

Graphics Card

Sep 2011

Release Date

Apr 2009

Northern Islands

Generation

Radeon R700

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

1050 MHz

Memory Clock

975 MHz

Memory

2GB

Memory Size

1024MB

GDDR5

Memory Type

GDDR5

256bit

Memory Bus

256bit

134.4GB/s

Bandwidth

124.8GB/s

Render Config

12

Compute Units

10

-

960

Shading Units

800

48

TMUs

40

32

ROPs

16

-

8 KB (per CU)

L1 Cache

16 KB (per CU)

512 KB

L2 Cache

256 KB

-

Theoretical Performance

25.60 GPixel/s

Pixel Rate

13.60 GPixel/s

38.40 GTexel/s

Texture Rate

34.00 GTexel/s

-

1.536 TFLOPS

FP32 (float)

1360 GFLOPS

-

FP64 (double)

272.0 GFLOPS

Board Design

254W

TDP

190W

600 W

Suggested PSU

450 W

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

Outputs

2x DVI 1x S-Video

2x 8-pin

Power Connectors

2x 6-pin

Graphics Processor

Barts

GPU Name

RV790

Barts PRO (215-0798006)

GPU Variant

RV790 XT (215-0758016)

TeraScale 2

Architecture

TeraScale

TSMC

Foundry

TSMC

40 nm

Process Size

55 nm

1.7 billion

Transistors

0.959 billion

255 mm²

Die Size

282 mm²

Graphics Features

11.2 (11_0)

DirectX

10.1 (10_1)

4.4

OpenGL

3.3

1.2

OpenCL

1.1

N/A

Vulkan

N/A

-

5.0

Shader Model

4.1

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