AMD Radeon HD 6790 vs ATI Radeon HD 2900 GT

VS

AMD Radeon HD 6790

ATI Radeon HD 2900 GT

We compared two Desktop platform GPUs: 1024MB VRAM Radeon HD 6790 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 6790 's Advantages

Released 3 years and 5 months late

More VRAM (1024GB vs 256GB)

Larger VRAM bandwidth (134.4GB/s vs 51.20GB/s)

560 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon HD 6790 +366%

1.344 TFLOPS

Radeon HD 2900 GT

0.288 TFLOPS

Radeon HD 6790

VS

Radeon HD 2900 GT

Graphics Card

Apr 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

-

1050 MHz

Memory Clock

800 MHz

Memory

1024MB

Memory Size

256MB

GDDR5

Memory Type

GDDR3

256bit

Memory Bus

256bit

134.4GB/s

Bandwidth

51.20GB/s

Render Config

10

Compute Units

3

-

800

Shading Units

240

40

TMUs

12

16

ROPs

12

-

8 KB (per CU)

L1 Cache

-

512 KB

L2 Cache

128 KB

-

Theoretical Performance

13.44 GPixel/s

Pixel Rate

7.212 GPixel/s

33.60 GTexel/s

Texture Rate

7.212 GTexel/s

-

1344 GFLOPS

FP32 (float)

288.5 GFLOPS

-

Board Design

150W

TDP

150W

450 W

Suggested PSU

450 W

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

Outputs

2x DVI 1x S-Video

2x 6-pin

Power Connectors

1x 8-pin

Graphics Processor

Barts

GPU Name

R600

Barts LE (215-0798002)

GPU Variant

R600 GT (215RGFDKA13FG)

TeraScale 2

Architecture

TeraScale

TSMC

Foundry

TSMC

40 nm

Process Size

80 nm

1.7 billion

Transistors

0.72 billion

255 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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