AMD Radeon HD 7990 vs AMD Radeon RX 455 OEM

VS

AMD Radeon HD 7990 AMD Radeon RX 455 OEM

We compared two Desktop platform GPUs: 3GB VRAM Radeon HD 7990 and 2GB VRAM Radeon RX 455 OEM to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon HD 7990 's Advantages

Boost Clock1000MHz

More VRAM (3GB vs 2GB)

Larger VRAM bandwidth (288.0GB/s vs 104.0GB/s)

1280 additional rendering cores

AMD Radeon RX 455 OEM 's Advantages

Released 3 years and 2 months late

Lower TDP (100W vs 375W)

Score

Benchmark

FP32 (float)

Radeon HD 7990 +153%

4.096 TFLOPS

Radeon RX 455 OEM

1.613 TFLOPS

Radeon HD 7990

VS

Radeon RX 455 OEM

Graphics Card

Apr 2013

Release Date

Jun 2016

Southern Islands

Generation

Arctic 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

1625 MHz

Memory

3GB

Memory Size

2GB

GDDR5

Memory Type

GDDR5

384bit

Memory Bus

128bit

288.0GB/s

Bandwidth

104.0GB/s

Render Config

-

SM Count

-

32

Compute Units

12

2048

Shading Units

768

128

TMUs

48

32

ROPs

16

-

Tensor Cores

-

RT Cores

-

16 KB (per CU)

L1 Cache

16 KB (per CU)

768 KB

L2 Cache

256 KB

Theoretical Performance

32.00 GPixel/s

Pixel Rate

16.80 GPixel/s

128.0 GTexel/s

Texture Rate

50.40 GTexel/s

-

FP16 (half)

-

4.096 TFLOPS

FP32 (float)

1.613 TFLOPS

1024 GFLOPS

FP64 (double)

100.8 GFLOPS

Graphics Processor

Malta

GPU Name

Tobago

Malta XT (215-0849026)

GPU Variant

Tobago PRO (215-0875010)

GCN 1.0

Architecture

GCN 2.0

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

4.313 billion

Transistors

2.08 billion

365 mm²

Die Size

160 mm²

Board Design

375W

TDP

100W

750 W

Suggested PSU

300 W

1x DVI 4x mini-DisplayPort 1.2

Outputs

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

2x 8-pin

Power Connectors

1x 6-pin

Graphics Features

12 (11_1)

DirectX

12 (12_0)

4.6

OpenGL

4.6

1.2

OpenCL

2.0

1.2

Vulkan

1.2

-

CUDA

-

5.1

Shader Model

6.3

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