AMD Radeon HD 7990 vs AMD Radeon RX 460

VS

AMD Radeon HD 7990

AMD Radeon RX 460

We compared two Desktop platform GPUs: 3GB VRAM Radeon HD 7990 and 2GB VRAM Radeon RX 460 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 7990 's Advantages

More VRAM (3GB vs 2GB)

Larger VRAM bandwidth (288.0GB/s vs 112.0GB/s)

1152 additional rendering cores

AMD Radeon RX 460 's Advantages

Released 3 years and 4 months late

Boost Clock has increased by 20% (1200MHz vs 1000MHz)

Lower TDP (75W vs 375W)

Score

Benchmark

FP32 (float)

Radeon HD 7990 +90%

4.096 TFLOPS

Radeon RX 460

2.15 TFLOPS

Radeon HD 7990

VS

Radeon RX 460

Graphics Card

Apr 2013

Release Date

Aug 2016

Southern Islands

Generation

Arctic Islands

Desktop

Type

Desktop

PCIe 3.0 x16

Bus Interface

PCIe 3.0 x8

Clock Speeds

950 MHz

Base Clock

1090 MHz

1000 MHz

Boost Clock

1200 MHz

1500 MHz

Memory Clock

1750 MHz

Memory

3GB

Memory Size

2GB

GDDR5

Memory Type

GDDR5

384bit

Memory Bus

128bit

288.0GB/s

Bandwidth

112.0GB/s

Render Config

32

Compute Units

14

-

2048

Shading Units

896

128

TMUs

56

32

ROPs

16

-

16 KB (per CU)

L1 Cache

16 KB (per CU)

768 KB

L2 Cache

1024 KB

-

Theoretical Performance

32.00 GPixel/s

Pixel Rate

19.20 GPixel/s

128.0 GTexel/s

Texture Rate

67.20 GTexel/s

-

FP16 (half)

2.150 TFLOPS

4.096 TFLOPS

FP32 (float)

2.150 TFLOPS

1024 GFLOPS

FP64 (double)

134.4 GFLOPS

Board Design

375W

TDP

75W

750 W

Suggested PSU

250 W

1x DVI 4x mini-DisplayPort 1.2

Outputs

1x DVI 1x HDMI 2.0b 1x DisplayPort 1.4a

2x 8-pin

Power Connectors

None

Graphics Processor

Malta

GPU Name

Baffin

Malta XT (215-0849026)

GPU Variant

Baffin PRO

GCN 1.0

Architecture

GCN 4.0

TSMC

Foundry

GlobalFoundries

28 nm

Process Size

14 nm

4.313 billion

Transistors

3 billion

365 mm²

Die Size

123 mm²

Graphics Features

12 (11_1)

DirectX

12 (12_0)

4.6

OpenGL

4.6

1.2

OpenCL

2.1

1.2

Vulkan

1.2

-

5.1

Shader Model

6.4

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