ATI Radeon HD 3870 AGP vs ATI Radeon HD 2900 GT

VS

ATI Radeon HD 3870 AGP

ATI Radeon HD 2900 GT

We compared two Desktop platform GPUs: 512MB VRAM Radeon HD 3870 AGP and 256MB VRAM Radeon HD 2900 GT to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

ATI Radeon HD 3870 AGP 's Advantages

More VRAM (512GB vs 256GB)

Larger VRAM bandwidth (72.06GB/s vs 51.20GB/s)

80 additional rendering cores

Lower TDP (106W vs 150W)

Score

Benchmark

FP32 (float)

Radeon HD 3870 AGP +72%

0.497 TFLOPS

Radeon HD 2900 GT

0.288 TFLOPS

Radeon HD 3870 AGP

VS

Radeon HD 2900 GT

Graphics Card

Unknown

Release Date

Nov 2007

Radeon R600

Generation

Radeon R600

Desktop

Type

Desktop

AGP 8x

Bus Interface

PCIe 1.0 x16

Clock Speeds

-

1126 MHz

Memory Clock

800 MHz

Memory

512MB

Memory Size

256MB

GDDR4

Memory Type

GDDR3

256bit

Memory Bus

256bit

72.06GB/s

Bandwidth

51.20GB/s

Render Config

4

Compute Units

3

-

320

Shading Units

240

16

TMUs

12

16

ROPs

12

-

256 KB

L2 Cache

128 KB

-

Theoretical Performance

12.43 GPixel/s

Pixel Rate

7.212 GPixel/s

12.43 GTexel/s

Texture Rate

7.212 GTexel/s

-

497.3 GFLOPS

FP32 (float)

288.5 GFLOPS

99.46 GFLOPS

FP64 (double)

-

Board Design

106W

TDP

150W

300 W

Suggested PSU

450 W

2x DVI 1x S-Video

Outputs

2x DVI 1x S-Video

1x 8-pin

Power Connectors

1x 8-pin

Graphics Processor

RV670

GPU Name

R600

RV670 XT (215-0708005)

GPU Variant

R600 GT (215RGFDKA13FG)

TeraScale

Architecture

TeraScale

TSMC

Foundry

TSMC

55 nm

Process Size

80 nm

0.666 billion

Transistors

0.72 billion

192 mm²

Die Size

420 mm²

Graphics Features

10.1 (10_1)

DirectX

10.0 (10_0)

3.3 (full) 4.0 (partial)

OpenGL

3.3 (full) 4.0 (partial)

N/A

OpenCL

N/A

Vulkan

N/A

-

4.1

Shader Model

4.0

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