AMD Radeon HD 7970 X2 vs ATI Radeon HD 3650

VS

AMD Radeon HD 7970 X2

ATI Radeon HD 3650

We compared two Desktop platform GPUs: 3GB VRAM Radeon HD 7970 X2 and 256MB VRAM Radeon HD 3650 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 7970 X2 's Advantages

Released 4 years and 7 months late

More VRAM (3GB vs 256GB)

Larger VRAM bandwidth (264.0GB/s vs 25.60GB/s)

1928 additional rendering cores

ATI Radeon HD 3650 's Advantages

Lower TDP (65W vs 500W)

Score

Benchmark

FP32 (float)

Radeon HD 7970 X2 +2077%

3.789 TFLOPS

Radeon HD 3650

0.174 TFLOPS

Radeon HD 7970 X2

VS

Radeon HD 3650

Graphics Card

Aug 2012

Release Date

Jan 2008

Southern Islands

Generation

Radeon R600

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 2.0 x16

Clock Speeds

-

1375 MHz

Memory Clock

800 MHz

Memory

3GB

Memory Size

256MB

GDDR5

Memory Type

GDDR3

384bit

Memory Bus

128bit

264.0GB/s

Bandwidth

25.60GB/s

Render Config

32

Compute Units

3

-

2048

Shading Units

120

128

TMUs

8

32

ROPs

4

-

16 KB (per CU)

L1 Cache

-

768 KB

L2 Cache

128 KB

-

Theoretical Performance

29.60 GPixel/s

Pixel Rate

2.900 GPixel/s

118.4 GTexel/s

Texture Rate

5.800 GTexel/s

-

3.789 TFLOPS

FP32 (float)

174.0 GFLOPS

947.2 GFLOPS

FP64 (double)

-

Board Design

500W

TDP

65W

900 W

Suggested PSU

250 W

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

Outputs

2x DVI 1x S-Video

3x 8-pin

Power Connectors

None

Graphics Processor

New Zealand

GPU Name

RV635

-

GPU Variant

RV635 PRO (215-0682008)

GCN 1.0

Architecture

TeraScale

TSMC

Foundry

TSMC

28 nm

Process Size

55 nm

4.313 billion

Transistors

0.378 billion

352 mm²

Die Size

135 mm²

Graphics Features

12 (11_1)

DirectX

10.1 (10_1)

4.6

OpenGL

3.3

1.2

OpenCL

N/A

1.2

Vulkan

N/A

-

5.1

Shader Model

4.1

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