AMD Radeon HD 6870 X2 vs AMD Radeon HD 7770 GHz Edition

Graphics Processor

GPU model Barts Cape Verde
GPU variant Barts XT (215-0798000) Cape Verde XT
Architecture TeraScale 2 GCN 1.0
Foundry TSMC TSMC
Manufacturing process 40 nm 28 nm
Number of transistors 1,700 million 1,500 million
Die size 255 mm² 123 mm²

Graphics Card

Release date Jul 8th, 2011 Feb 15th, 2012
Generation Northern Islands Southern Islands
Production End-of-life End-of-life
Launch price 520 USD 159 USD
Interface PCIe 2.0 x16 PCIe 3.0 x16
Reviews 170 in our database 97 in our database
Predecessor Evergreen Northern Islands
Successor Southern Islands Sea Islands

Clocks

GPU clock 900 MHz 1000 MHz
Memory clock 1050 MHz 4.2 Gbps effective 1125 MHz 4.5 Gbps effective

Memory Configuration

Memory size 1024 MB 1024 MB
Memory type GDDR5 GDDR5
Memory bus width 256 bit 128 bit
Bandwidth 134.4 GB/s 72.00 GB/s

Render Configuration

Shading units 1120 640
TMUs 56 40
ROPs 32 16
Compute units 14 10
Cache L1 8 KB (per CU) 16 KB (per CU)
Cache L2 512 KB 256 KB

Performance

Pixel rate 28.80 GPixel/s 16.00 GPixel/s
Texture rate 50.40 GTexel/s 40.00 GTexel/s
FP32 (float) performance 2.016 TFLOPS 1,280 GFLOPS
FP64 (double) performance 80.00 GFLOPS (1:16)

Dimensions & Outputs

Slot width Dual-slot Dual-slot
Length 304 mm 12 inches 210 mm 8.3 inches
TDP 300 W 80 W
Suggested PSU 700 W 250 W
Outputs 2x DVI1x HDMI2x mini-DisplayPort 1x DVI1x HDMI2x mini-DisplayPort
Power connectors 1x 6-pin
Board number C441, C468

API Support & Features

DirectX 11.2 (11_0) 12 (11_1)
OpenGL 4.4 4.6
OpenCL 1.2 1.2
Vulkan 1.2
Shader model 5.0 5.1

Other Features

Compare

Sysrqmts browser extension icon
Stop overpaying for PC games!
See cheapest prices in Steam store with our browser extension.