AMD Radeon HD 7970 vs AMD Radeon R9 M395 Mac Edition

Graphics Processor

GPU model Tahiti Amethyst
GPU variant Tahiti XT (215-0821060) Amethyst PRO (216-0872004)
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 352 mm² 366 mm²

Graphics Card

Release date Dec 22nd, 2011
Generation Southern Islands
Production End-of-life
Launch price 549 USD
Interface PCIe 3.0 x16
Reviews 191 in our database
gpu.details.availability Jan 9th, 2012
Predecessor Northern Islands
Successor Sea Islands

Clocks

GPU clock 925 MHz 834 MHz
Memory clock 1375 MHz 5.5 Gbps effective 1365 MHz 5.5 Gbps effective

Memory Configuration

Memory size 3 GB 2 GB
Memory type GDDR5 GDDR5
Memory bus width 384 bit 256 bit
Bandwidth 264.0 GB/s 174.7 GB/s

Render Configuration

Shading units 2048 1792
TMUs 128 112
ROPs 32 32
Compute units 32 28
Cache L1 16 KB (per CU)
Cache L2 768 KB

Performance

Pixel rate 29.60 GPixel/s 26.69 GPixel/s
Texture rate 118.4 GTexel/s 93.41 GTexel/s
FP32 (float) performance 3.789 TFLOPS 2.989 TFLOPS
FP64 (double) performance 947.2 GFLOPS (1:4) 373.6 GFLOPS (1:8)

Dimensions & Outputs

Slot width Dual-slot MXM Module
Length 275 mm 10.8 inches
Width 111 mm 4.4 inches
Height 38 mm 1.5 inches
TDP 250 W 250 W
Suggested PSU 600 W
Outputs 1x DVI1x HDMI2x mini-DisplayPort No outputs
Power connectors 1x 6-pin + 1x 8-pin None
Board number C386-37

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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