AMD Radeon R9 M385X vs AMD Radeon HD 8790M

VS

AMD Radeon R9 M385X

AMD Radeon HD 8790M

We compared two Mobile platform GPUs: 4GB VRAM Radeon R9 M385X and 2GB VRAM Radeon HD 8790M to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon R9 M385X 's Advantages

Released 2 years and 1 months late

Boost Clock has increased by 22% (1100MHz vs 900MHz)

More VRAM (4GB vs 2GB)

Larger VRAM bandwidth (76.80GB/s vs 64.00GB/s)

512 additional rendering cores

Score

Benchmark

FP32 (float)

Radeon R9 M385X +185%

1.971 TFLOPS

Radeon HD 8790M

0.691 TFLOPS

Radeon R9 M385X

VS

Radeon HD 8790M

Graphics Card

May 2015

Release Date

Apr 2013

Gem System

Generation

Solar System

Mobile

Type

Mobile

PCIe 3.0 x16

Bus Interface

MXM-A (3.0)

Clock Speeds

1000 MHz

Base Clock

850 MHz

1100 MHz

Boost Clock

900 MHz

1200 MHz

Memory Clock

1000 MHz

Memory

4GB

Memory Size

2GB

GDDR5

Memory Type

GDDR5

128bit

Memory Bus

128bit

76.80GB/s

Bandwidth

64.00GB/s

Render Config

14

Compute Units

6

-

896

Shading Units

384

56

TMUs

24

16

ROPs

8

-

16 KB (per CU)

L1 Cache

16 KB (per CU)

256 KB

L2 Cache

256 KB

-

Theoretical Performance

17.60 GPixel/s

Pixel Rate

7.200 GPixel/s

61.60 GTexel/s

Texture Rate

21.60 GTexel/s

-

1.971 TFLOPS

FP32 (float)

691.2 GFLOPS

123.2 GFLOPS

FP64 (double)

43.20 GFLOPS

Board Design

Unknown

TDP

Unknown

-

Portable Device Dependent

Outputs

Portable Device Dependent

-

Power Connectors

None

Graphics Processor

Strato

GPU Name

Mars

Strato XT

GPU Variant

Mars M2 XTX (216-0842036)

GCN 2.0

Architecture

GCN 1.0

TSMC

Foundry

TSMC

28 nm

Process Size

28 nm

2.08 billion

Transistors

0.95 billion

160 mm²

Die Size

77 mm²

Graphics Features

12 (12_0)

DirectX

12 (11_1)

4.6

OpenGL

4.6

2.1

OpenCL

2.1 (1.2)

1.2.170

Vulkan

1.2.170

-

6.5

Shader Model

6.5 (5.1)

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