AMD Radeon HD 8990 OEM vs AMD Radeon R9 M395X Mac Edition

Table of Contents

Graphics Processor

GPU model Malta Amethyst
GPU variant Malta XT (215-0849026) Amethyst XT
Architecture GCN 1.0 GCN 3.0
Foundry TSMC TSMC
Manufacturing process 28 nm 28 nm
Number of transistors 4,313 million 5,000 million
Die size 365 mm² 366 mm²

Graphics Card

Release date Apr 24th, 2013
Generation Sea Islands
Production End-of-life
Interface PCIe 3.0 x16
Predecessor Southern Islands
Successor Volcanic Islands

Clocks

Base clock 950 MHz
Boost clock 1000 MHz
Memory clock 1500 MHz 6 Gbps effective 1365 MHz 5.5 Gbps effective
GPU clock 909 MHz

Memory Configuration

Memory size 3 GB 4 GB
Memory type GDDR5 GDDR5
Memory bus width 384 bit 256 bit
Bandwidth 288.0 GB/s 174.7 GB/s

Render Configuration

Shading units 2048 2048
TMUs 128 128
ROPs 32 32
Compute units 32 32
Cache L1 16 KB (per CU) 16 KB (per CU)
Cache L2 768 KB 512 KB

Performance

Pixel rate 32.00 GPixel/s 29.09 GPixel/s
Texture rate 128.0 GTexel/s 116.4 GTexel/s
FP32 (float) performance 4.096 TFLOPS 3.723 TFLOPS
FP64 (double) performance 1,024 GFLOPS (1:4) 232.7 GFLOPS (1:16)
FP16 (half) performance 3.723 TFLOPS (1:1)

Dimensions & Outputs

Slot width Dual-slot MXM Module
Length 307 mm 12.1 inches
TDP 375 W 250 W
Suggested PSU 750 W
Outputs 1x DVI4x mini-DisplayPort No outputs
Power connectors 2x 8-pin None

API Support & Features

DirectX 12 (11_1) 12 (12_0)
OpenGL 4.6 4.6
OpenCL 1.2 2.0
Vulkan 1.2 1.2
Shader model 5.1 6.3

Other Features

Mobile graphics

Release date May 5th, 2015
Generation Crystal System (R9 M300)
Production End-of-life
Interface MXM-B (3.0)
Predecessor Solar System
Successor Mobility Radeon

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