AMD Radeon R9 280X vs AMD Radeon HD 7990

VS

We compared two Desktop platform GPUs: 3GB VRAM Radeon R9 280X and 3GB VRAM Radeon HD 7990 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon R9 280X 's Advantages

Released 6 months late

Lower TDP (250W vs 375W)

Score

Benchmark

FP32 (float)

Radeon R9 280X

4.096 TFLOPS

Radeon HD 7990

4.096 TFLOPS

Radeon R9 280X

VS

Radeon HD 7990

Graphics Card

Oct 2013

Release Date

Apr 2013

Volcanic Islands

Generation

Southern Islands

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 3.0 x16

Clock Speeds

850 MHz

Base Clock

950 MHz

1000 MHz

Boost Clock

1000 MHz

1500 MHz

Memory Clock

1500 MHz

Memory

3GB

Memory Size

3GB

GDDR5

Memory Type

GDDR5

384bit

Memory Bus

384bit

288.0GB/s

Bandwidth

288.0GB/s

Render Config

-

SM Count

-

32

Compute Units

32

2048

Shading Units

2048

128

TMUs

128

32

ROPs

32

-

Tensor Cores

-

RT Cores

-

16 KB (per CU)

L1 Cache

16 KB (per CU)

768 KB

L2 Cache

768 KB

Theoretical Performance

32.00 GPixel/s

Pixel Rate

32.00 GPixel/s

128.0 GTexel/s

Texture Rate

128.0 GTexel/s

-

FP16 (half)

-

4.096 TFLOPS

FP32 (float)

4.096 TFLOPS

1024 GFLOPS

FP64 (double)

1024 GFLOPS

Graphics Processor

Tahiti

GPU Name

Malta

Tahiti XTL (215-0821065)

GPU Variant

Malta XT (215-0849026)

GCN 1.0

Architecture

GCN 1.0

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

4.313 billion

Transistors

4.313 billion

352 mm²

Die Size

365 mm²

Board Design

250W

TDP

375W

600 W

Suggested PSU

750 W

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

Outputs

1x DVI 4x mini-DisplayPort 1.2

1x 6-pin + 1x 8-pin

Power Connectors

2x 8-pin

Graphics Features

12 (11_1)

DirectX

12 (11_1)

4.6

OpenGL

4.6

1.2

OpenCL

1.2

Vulkan

1.2

-

CUDA

-

5.1

Shader Model

5.1

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