AMD Radeon HD 6870 X2 vs ATI Radeon HD 5870 Mac Edition

Table of Contents

Graphics Processor

GPU model Barts Cypress
GPU variant Barts XT (215-0798000) Cypress XT (215-0735033)
Architecture TeraScale 2 TeraScale 2
Foundry TSMC TSMC
Manufacturing process 40 nm 40 nm
Number of transistors 1,700 million 2,154 million
Die size 255 mm² 334 mm²

Graphics Card

Release date Jul 8th, 2011 Jun 30th, 2010
Generation Northern Islands Evergreen
Production End-of-life End-of-life
Launch price 520 USD 479 USD
Interface PCIe 2.0 x16 PCIe 2.0 x16
Reviews 170 in our database 171 in our database
Predecessor Evergreen Radeon R700
Successor Southern Islands Northern Islands

Clocks

GPU clock 900 MHz 850 MHz
Memory clock 1050 MHz 4.2 Gbps effective 1195 MHz 4.8 Gbps effective

Memory Configuration

Memory size 1024 MB 1024 MB
Memory type GDDR5 GDDR5
Memory bus width 256 bit 256 bit
Bandwidth 134.4 GB/s 153.0 GB/s

Render Configuration

Shading units 1120 1600
TMUs 56 80
ROPs 32 32
Compute units 14 20
Cache L1 8 KB (per CU) 8 KB (per CU)
Cache L2 512 KB 512 KB

Performance

Pixel rate 28.80 GPixel/s 27.20 GPixel/s
Texture rate 50.40 GTexel/s 68.00 GTexel/s
FP32 (float) performance 2.016 TFLOPS 2.720 TFLOPS
FP64 (double) performance 544.0 GFLOPS (1:5)

Dimensions & Outputs

Slot width Dual-slot Dual-slot
Length 304 mm 12 inches 279 mm 11 inches
TDP 300 W 228 W
Suggested PSU 700 W 550 W
Outputs 2x DVI1x HDMI2x mini-DisplayPort 1x DVI2x mini-DisplayPort
Power connectors 2x 6-pin
Board number C078

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

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