AMD Radeon R9 270X vs AMD Radeon R9 M395 Mac Edition

Graphics Processor

GPU model Curacao Amethyst
GPU variant Curacao XT (215-0848004) Amethyst PRO (216-0872004)
Architecture GCN 1.0 GCN 3.0
Foundry TSMC TSMC
Manufacturing process 28 nm 28 nm
Number of transistors 2,800 million 5,000 million
Die size 212 mm² 366 mm²

Graphics Card

Release date Oct 8th, 2013
Generation Volcanic Islands
Production End-of-life
Launch price 199 USD
Interface PCIe 3.0 x16
Reviews 90 in our database
Predecessor Sea Islands
Successor Pirate Islands

Clocks

Base clock 1000 MHz
Boost clock 1050 MHz
Memory clock 1400 MHz 5.6 Gbps effective 1365 MHz 5.5 Gbps effective
GPU clock 834 MHz

Memory Configuration

Memory size 2 GB 2 GB
Memory type GDDR5 GDDR5
Memory bus width 256 bit 256 bit
Bandwidth 179.2 GB/s 174.7 GB/s

Render Configuration

Shading units 1280 1792
TMUs 80 112
ROPs 32 32
Compute units 20 28
Cache L1 16 KB (per CU)
Cache L2 512 KB

Performance

Pixel rate 33.60 GPixel/s 26.69 GPixel/s
Texture rate 84.00 GTexel/s 93.41 GTexel/s
FP32 (float) performance 2.688 TFLOPS 2.989 TFLOPS
FP64 (double) performance 168.0 GFLOPS (1:16) 373.6 GFLOPS (1:8)

Dimensions & Outputs

Slot width Dual-slot MXM Module
Length 241 mm 9.5 inches
Width 109 mm 4.3 inches
Height 36 mm 1.4 inches
TDP 180 W 250 W
Suggested PSU 450 W
Outputs 2x DVI1x HDMI1x DisplayPort No outputs
Power connectors 2x 6-pin None
Board number C631, C632

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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