AMD Radeon HD 7870 GHz Edition vs AMD Radeon HD 7950 Mac Edition

Table of Contents

Graphics Processor

GPU model Pitcairn Tahiti
GPU variant Pitcairn XT (215-0828047) Tahiti PRO (215-0821056)
Architecture GCN 1.0 GCN 1.0
Foundry TSMC TSMC
Manufacturing process 28 nm 28 nm
Number of transistors 2,800 million 4,313 million
Die size 212 mm² 352 mm²

Graphics Card

Release date Mar 5th, 2012 Mar 7th, 2013
Generation Southern Islands Southern Islands
Production End-of-life End-of-life
Launch price 349 USD 449 USD
Interface PCIe 3.0 x16 PCIe 3.0 x16
Reviews 95 in our database 118 in our database
Predecessor Northern Islands Northern Islands
Successor Sea Islands Sea Islands

Clocks

GPU clock 1000 MHz 800 MHz
Memory clock 1200 MHz 4.8 Gbps effective 1250 MHz 5 Gbps effective

Memory Configuration

Memory size 2 GB 3 GB
Memory type GDDR5 GDDR5
Memory bus width 256 bit 384 bit
Bandwidth 153.6 GB/s 240.0 GB/s

Render Configuration

Shading units 1280 1792
TMUs 80 112
ROPs 32 32
Compute units 20 28
Cache L1 16 KB (per CU) 16 KB (per CU)
Cache L2 512 KB 768 KB

Performance

Pixel rate 32.00 GPixel/s 25.60 GPixel/s
Texture rate 80.00 GTexel/s 89.60 GTexel/s
FP32 (float) performance 2.560 TFLOPS 2.867 TFLOPS
FP64 (double) performance 160.0 GFLOPS (1:16) 716.8 GFLOPS (1:4)

Dimensions & Outputs

Slot width Dual-slot Dual-slot
Length 241 mm 9.5 inches 279 mm 11 inches
TDP 175 W 200 W
Suggested PSU 450 W 550 W
Outputs 1x DVI1x HDMI2x mini-DisplayPort 1x DVI1x HDMI2x mini-DisplayPort
Power connectors 2x 6-pin 2x 6-pin
Board number C401-47 C381

API Support & Features

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

Other Features

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