ATI Radeon HD 3870 vs AMD Radeon HD 7970

VS

We compared two Desktop platform GPUs: 512MB VRAM Radeon HD 3870 and 3GB VRAM Radeon HD 7970 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

ATI Radeon HD 3870 's Advantages

Lower TDP (106W vs 250W)

AMD Radeon HD 7970 's Advantages

Released 4 years and 1 months late

Larger VRAM bandwidth (264.0GB/s vs 72.06GB/s)

1728 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon HD 3870

0.497 TFLOPS

Radeon HD 7970 +662%

3.789 TFLOPS

Radeon HD 3870

VS

Radeon HD 7970

Graphics Card

Nov 2007

Release Date

Dec 2011

Radeon R600

Generation

Southern Islands

Desktop

Type

Desktop

PCIe 2.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

-

Base Clock

-

Boost Clock

-

1126 MHz

Memory Clock

1375 MHz

Memory

512MB

Memory Size

3GB

GDDR4

Memory Type

GDDR5

256bit

Memory Bus

384bit

72.06GB/s

Bandwidth

264.0GB/s

Render Config

-

SM Count

-

4

Compute Units

32

320

Shading Units

2048

16

TMUs

128

16

ROPs

32

-

Tensor Cores

-

RT Cores

-

L1 Cache

16 KB (per CU)

256 KB

L2 Cache

768 KB

Theoretical Performance

12.43 GPixel/s

Pixel Rate

29.60 GPixel/s

12.43 GTexel/s

Texture Rate

118.4 GTexel/s

-

FP16 (half)

-

497.3 GFLOPS

FP32 (float)

3.789 TFLOPS

99.46 GFLOPS

FP64 (double)

947.2 GFLOPS

Graphics Processor

RV670

GPU Name

Tahiti

RV670 XT (215-0708005)

GPU Variant

Tahiti XT (215-0821060)

TeraScale

Architecture

GCN 1.0

TSMC

Foundry

TSMC

55 nm

Process Size

28 nm

0.666 billion

Transistors

4.313 billion

192 mm²

Die Size

352 mm²

Board Design

106W

TDP

250W

300 W

Suggested PSU

600 W

2x DVI 1x S-Video

Outputs

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

1x 6-pin

Power Connectors

1x 6-pin + 1x 8-pin

Graphics Features

10.1 (10_1)

DirectX

12 (11_1)

3.3 (full) 4.0 (partial)

OpenGL

4.6

N/A

OpenCL

1.2

N/A

Vulkan

1.2

-

CUDA

-

4.1

Shader Model

5.1

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