AMD Radeon HD 6970 X2 vs AMD Radeon HD 6970M Mac Edition

Table of Contents

Graphics Processor

GPU model Antilles Blackcomb
GPU variant Antilles XT (215-0807027) Blackcomb XT (216-0811000)
Architecture TeraScale 3 TeraScale 2
Foundry TSMC TSMC
Manufacturing process 40 nm 40 nm
Number of transistors 2,640 million 1,700 million
Die size 389 mm² 212 mm²

Graphics Card

Release date Never Released
Generation Northern Islands
Production End-of-life
Interface PCIe 2.0 x16
Predecessor Evergreen
Successor Southern Islands

Clocks

GPU clock 880 MHz 680 MHz
Memory clock 1375 MHz 5.5 Gbps effective 900 MHz 3.6 Gbps effective

Memory Configuration

Memory size 2 GB 2 GB
Memory type GDDR5 GDDR5
Memory bus width 256 bit 256 bit
Bandwidth 176.0 GB/s 115.2 GB/s

Render Configuration

Shading units 1536 960
TMUs 96 48
ROPs 32 32
Compute units 24 12
Cache L1 8 KB (per CU) 8 KB (per CU)
Cache L2 512 KB 512 KB

Performance

Pixel rate 28.16 GPixel/s 21.76 GPixel/s
Texture rate 84.48 GTexel/s 32.64 GTexel/s
FP32 (float) performance 2.703 TFLOPS 1,306 GFLOPS

Dimensions & Outputs

Slot width Dual-slot MXM Module
TDP 375 W 75 W
Suggested PSU 750 W
Outputs 2x DVI1x HDMI2x mini-DisplayPort No outputs
Power connectors 3x 8-pin None
Board number C296

API Support & Features

DirectX 11.2 (11_0) 11.2 (11_0)
OpenGL 4.4 4.4
OpenCL 1.2 1.2
Vulkan
Shader model 5.0 5.0

Other Features

Mobile graphics

Release date Aug 25th, 2011
Generation Vancouver (HD 6900M)
Production End-of-life
Interface MXM-B (3.0)
Predecessor Manhattan
Successor London

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