AMD Radeon HD 6390 vs ATI Radeon HD 2900 GT

VS

AMD Radeon HD 6390

ATI Radeon HD 2900 GT

We compared two Desktop platform GPUs: 1024MB VRAM Radeon HD 6390 and 256MB VRAM Radeon HD 2900 GT to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 6390 's Advantages

Released 3 years and 8 months late

More VRAM (1024GB vs 256GB)

80 additional rendering cores

Lower TDP (39W vs 150W)

ATI Radeon HD 2900 GT 's Advantages

Larger VRAM bandwidth (51.20GB/s vs 16.00GB/s)

Score

Benchmark

FP32 (float)

Radeon HD 6390 +22%

0.352 TFLOPS

Radeon HD 2900 GT

0.288 TFLOPS

Radeon HD 6390

VS

Radeon HD 2900 GT

Graphics Card

Jul 2011

Release Date

Nov 2007

Northern Islands

Generation

Radeon R600

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 1.0 x16

Clock Speeds

-

500 MHz

Memory Clock

800 MHz

Memory

1024MB

Memory Size

256MB

DDR2

Memory Type

GDDR3

128bit

Memory Bus

256bit

16.00GB/s

Bandwidth

51.20GB/s

Render Config

4

Compute Units

3

-

320

Shading Units

240

16

TMUs

12

8

ROPs

12

-

8 KB (per CU)

L1 Cache

-

256 KB

L2 Cache

128 KB

-

Theoretical Performance

4.400 GPixel/s

Pixel Rate

7.212 GPixel/s

8.800 GTexel/s

Texture Rate

7.212 GTexel/s

-

352.0 GFLOPS

FP32 (float)

288.5 GFLOPS

-

Board Design

39W

TDP

150W

200 W

Suggested PSU

450 W

1x DVI 1x HDMI 1.3a 1x VGA

Outputs

2x DVI 1x S-Video

None

Power Connectors

1x 8-pin

Graphics Processor

Redwood

GPU Name

R600

Redwood LE

GPU Variant

R600 GT (215RGFDKA13FG)

TeraScale 2

Architecture

TeraScale

TSMC

Foundry

TSMC

40 nm

Process Size

80 nm

0.627 billion

Transistors

0.72 billion

104 mm²

Die Size

420 mm²

Graphics Features

11.2 (11_0)

DirectX

10.0 (10_0)

4.4

OpenGL

3.3 (full) 4.0 (partial)

1.2

OpenCL

N/A

Vulkan

N/A

-

5.0

Shader Model

4.0

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