AMD Radeon HD 7870 GHz Edition vs ATI Radeon HD 2900 GT

VS

AMD Radeon HD 7870 GHz Edition

ATI Radeon HD 2900 GT

We compared two Desktop platform GPUs: 2GB VRAM Radeon HD 7870 GHz Edition 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 7870 GHz Edition 's Advantages

Released 4 years and 4 months late

More VRAM (2GB vs 256GB)

Larger VRAM bandwidth (153.6GB/s vs 51.20GB/s)

1040 additional rendering cores

ATI Radeon HD 2900 GT 's Advantages

Lower TDP (150W vs 175W)

Score

Benchmark

FP32 (float)

Radeon HD 7870 GHz Edition +788%

2.56 TFLOPS

Radeon HD 2900 GT

0.288 TFLOPS

Radeon HD 7870 GHz Edition

VS

Radeon HD 2900 GT

Graphics Card

Mar 2012

Release Date

Nov 2007

Southern Islands

Generation

Radeon R600

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 1.0 x16

Clock Speeds

-

1200 MHz

Memory Clock

800 MHz

Memory

2GB

Memory Size

256MB

GDDR5

Memory Type

GDDR3

256bit

Memory Bus

256bit

153.6GB/s

Bandwidth

51.20GB/s

Render Config

20

Compute Units

3

-

1280

Shading Units

240

80

TMUs

12

32

ROPs

12

-

16 KB (per CU)

L1 Cache

-

512 KB

L2 Cache

128 KB

-

Theoretical Performance

32.00 GPixel/s

Pixel Rate

7.212 GPixel/s

80.00 GTexel/s

Texture Rate

7.212 GTexel/s

-

2.560 TFLOPS

FP32 (float)

288.5 GFLOPS

160.0 GFLOPS

FP64 (double)

-

Board Design

175W

TDP

150W

450 W

Suggested PSU

450 W

1x DVI 1x HDMI 1.4a 2x mini-DisplayPort 1.2

Outputs

2x DVI 1x S-Video

2x 6-pin

Power Connectors

1x 8-pin

Graphics Processor

Pitcairn

GPU Name

R600

Pitcairn XT (215-0828047)

GPU Variant

R600 GT (215RGFDKA13FG)

GCN 1.0

Architecture

TeraScale

TSMC

Foundry

TSMC

28 nm

Process Size

80 nm

2.8 billion

Transistors

0.72 billion

212 mm²

Die Size

420 mm²

Graphics Features

12 (11_1)

DirectX

10.0 (10_0)

4.6

OpenGL

3.3 (full) 4.0 (partial)

1.2

OpenCL

N/A

1.2

Vulkan

N/A

-

5.1

Shader Model

4.0

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