AMD Radeon HD 7990 vs AMD Radeon HD 7970

VS

AMD Radeon HD 7990

AMD Radeon HD 7970

We compared two Desktop platform GPUs: 3GB VRAM Radeon HD 7990 and 3GB VRAM Radeon HD 7970 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 7990 's Advantages

Released 1 years and 4 months late

Boost Clock1000MHz

Larger VRAM bandwidth (288.0GB/s vs 264.0GB/s)

AMD Radeon HD 7970 's Advantages

Lower TDP (250W vs 375W)

Score

Benchmark

FP32 (float)

Radeon HD 7990 +8%

4.096 TFLOPS

Radeon HD 7970

3.789 TFLOPS

Radeon HD 7990

VS

Radeon HD 7970

Graphics Card

Apr 2013

Release Date

Dec 2011

Southern Islands

Generation

Southern Islands

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

950 MHz

Base Clock

-

1000 MHz

Boost Clock

-

1500 MHz

Memory Clock

1375 MHz

Memory

3GB

Memory Size

3GB

GDDR5

Memory Type

GDDR5

384bit

Memory Bus

384bit

288.0GB/s

Bandwidth

264.0GB/s

Render Config

32

Compute Units

32

-

2048

Shading Units

2048

128

TMUs

128

32

ROPs

32

-

16 KB (per CU)

L1 Cache

16 KB (per CU)

768 KB

L2 Cache

768 KB

-

Theoretical Performance

32.00 GPixel/s

Pixel Rate

29.60 GPixel/s

128.0 GTexel/s

Texture Rate

118.4 GTexel/s

-

4.096 TFLOPS

FP32 (float)

3.789 TFLOPS

1024 GFLOPS

FP64 (double)

947.2 GFLOPS

Board Design

375W

TDP

250W

750 W

Suggested PSU

600 W

1x DVI 4x mini-DisplayPort 1.2

Outputs

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

2x 8-pin

Power Connectors

1x 6-pin + 1x 8-pin

Graphics Processor

Malta

GPU Name

Tahiti

Malta XT (215-0849026)

GPU Variant

Tahiti XT (215-0821060)

GCN 1.0

Architecture

GCN 1.0

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

4.313 billion

Transistors

4.313 billion

365 mm²

Die Size

352 mm²

Graphics Features

12 (11_1)

DirectX

12 (11_1)

4.6

OpenGL

4.6

1.2

OpenCL

1.2

Vulkan

1.2

-

5.1

Shader Model

5.1

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