AMD Radeon HD 6490 vs ATI Radeon HD 3870 X2

VS

AMD Radeon HD 6490

ATI Radeon HD 3870 X2

We compared two Desktop platform GPUs: 1024MB VRAM Radeon HD 6490 and 512MB VRAM Radeon HD 3870 X2 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 6490 's Advantages

Released 3 years and 6 months late

More VRAM (1024GB vs 512GB)

Lower TDP (39W vs 165W)

ATI Radeon HD 3870 X2 's Advantages

Larger VRAM bandwidth (57.66GB/s vs 16.00GB/s)

Score

Benchmark

FP32 (float)

Radeon HD 6490

0.352 TFLOPS

Radeon HD 3870 X2 +50%

0.528 TFLOPS

Radeon HD 6490

VS

Radeon HD 3870 X2

Graphics Card

Jul 2011

Release Date

Jan 2008

Northern Islands

Generation

Radeon R600

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

500 MHz

Memory Clock

901 MHz

Memory

1024MB

Memory Size

512MB

DDR2

Memory Type

GDDR3

128bit

Memory Bus

256bit

16.00GB/s

Bandwidth

57.66GB/s

Render Config

4

Compute Units

4

-

320

Shading Units

320

16

TMUs

16

8

ROPs

16

-

8 KB (per CU)

L1 Cache

-

256 KB

L2 Cache

256 KB

-

Theoretical Performance

4.400 GPixel/s

Pixel Rate

13.20 GPixel/s

8.800 GTexel/s

Texture Rate

13.20 GTexel/s

-

352.0 GFLOPS

FP32 (float)

528.0 GFLOPS

-

FP64 (double)

105.6 GFLOPS

Board Design

39W

TDP

165W

200 W

Suggested PSU

450 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

R680

Redwood LE

GPU Variant

R680 XT (215-0708017)

TeraScale 2

Architecture

TeraScale

TSMC

Foundry

TSMC

40 nm

Process Size

55 nm

0.627 billion

Transistors

0.666 billion

104 mm²

Die Size

192 mm²

Graphics Features

11.2 (11_0)

DirectX

10.1 (10_1)

4.4

OpenGL

3.3 (full) 4.0 (partial)

1.2

OpenCL

N/A

Vulkan

N/A

-

5.0

Shader Model

4.1

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