AMD Radeon HD 6390 vs ATI Radeon HD 4870 X2

VS

AMD Radeon HD 6390

ATI Radeon HD 4870 X2

We compared two Desktop platform GPUs: 1024MB VRAM Radeon HD 6390 and 1024MB VRAM Radeon HD 4870 X2 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 6390 's Advantages

Released 2 years and 11 months late

Lower TDP (39W vs 286W)

ATI Radeon HD 4870 X2 's Advantages

Larger VRAM bandwidth (115.2GB/s vs 16.00GB/s)

480 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon HD 6390

0.352 TFLOPS

Radeon HD 4870 X2 +240%

1.2 TFLOPS

Radeon HD 6390

VS

Radeon HD 4870 X2

Graphics Card

Jul 2011

Release Date

Aug 2008

Northern Islands

Generation

Radeon R700

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

500 MHz

Memory Clock

900 MHz

Memory

1024MB

Memory Size

1024MB

DDR2

Memory Type

GDDR5

128bit

Memory Bus

256bit

16.00GB/s

Bandwidth

115.2GB/s

Render Config

4

Compute Units

10

-

320

Shading Units

800

16

TMUs

40

8

ROPs

16

-

8 KB (per CU)

L1 Cache

16 KB (per CU)

256 KB

L2 Cache

256 KB

-

Theoretical Performance

4.400 GPixel/s

Pixel Rate

12.00 GPixel/s

8.800 GTexel/s

Texture Rate

30.00 GTexel/s

-

352.0 GFLOPS

FP32 (float)

1200 GFLOPS

-

FP64 (double)

240.0 GFLOPS

Board Design

39W

TDP

286W

200 W

Suggested PSU

600 W

1x DVI 1x HDMI 1.3a 1x VGA

Outputs

2x DVI 1x S-Video

None

Power Connectors

1x 6-pin + 1x 8-pin

Graphics Processor

Redwood

GPU Name

R700

Redwood LE

GPU Variant

R700 XT (215-0669045)

TeraScale 2

Architecture

TeraScale

TSMC

Foundry

TSMC

40 nm

Process Size

55 nm

0.627 billion

Transistors

0.956 billion

104 mm²

Die Size

256 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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