AMD Radeon HD 8790M vs AMD Radeon R9 M290X

VS

We compared two Mobile platform GPUs: 2GB VRAM Radeon HD 8790M and 4GB VRAM Radeon R9 M290X to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon R9 M290X 's Advantages

Released 9 months late

More VRAM (4GB vs 2GB)

Larger VRAM bandwidth (153.6GB/s vs 64.00GB/s)

896 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon HD 8790M

0.691 TFLOPS

Radeon R9 M290X +233%

2.304 TFLOPS

Radeon HD 8790M

VS

Radeon R9 M290X

Graphics Card

Apr 2013

Release Date

Jan 2014

Solar System

Generation

Crystal System

Mobile

Type

Mobile

MXM-A (3.0)

Bus Interface

PCIe 3.0 x16

Clock Speeds

850 MHz

Base Clock

850 MHz

900 MHz

Boost Clock

900 MHz

1000 MHz

Memory Clock

1200 MHz

Memory

2GB

Memory Size

4GB

GDDR5

Memory Type

GDDR5

128bit

Memory Bus

256bit

64.00GB/s

Bandwidth

153.6GB/s

Render Config

-

SM Count

-

6

Compute Units

20

384

Shading Units

1280

24

TMUs

80

8

ROPs

32

-

Tensor Cores

-

RT Cores

-

16 KB (per CU)

L1 Cache

16 KB (per CU)

256 KB

L2 Cache

512 KB

Theoretical Performance

7.200 GPixel/s

Pixel Rate

28.80 GPixel/s

21.60 GTexel/s

Texture Rate

72.00 GTexel/s

-

FP16 (half)

-

691.2 GFLOPS

FP32 (float)

2.304 TFLOPS

43.20 GFLOPS

FP64 (double)

144.0 GFLOPS

Graphics Processor

Mars

GPU Name

Neptune

Mars M2 XTX (216-0842036)

GPU Variant

Neptune XT (216-0847000)

GCN 1.0

Architecture

GCN 1.0

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

0.95 billion

Transistors

2.8 billion

77 mm²

Die Size

212 mm²

Board Design

Unknown

TDP

100W

-

Suggested PSU

-

Portable Device Dependent

Outputs

No outputs

None

Power Connectors

None

Graphics Features

12 (11_1)

DirectX

12 (11_1)

4.6

OpenGL

4.6

2.1 (1.2)

OpenCL

1.2

1.2.170

Vulkan

1.2

-

CUDA

-

6.5 (5.1)

Shader Model

5.1

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