AMD Radeon HD 6770 Green Edition vs AMD Radeon R7 250

Table of Contents

Graphics Processor

GPU model Juniper Cape Verde
GPU variant Juniper LE (215-0754009) Cape Verde PRO
Architecture TeraScale 2 GCN 1.0
Foundry TSMC TSMC
Manufacturing process 40 nm 28 nm
Number of transistors 1,040 million 1,500 million
Die size 166 mm² 123 mm²

Graphics Card

Release date Apr 19th, 2013 Oct 8th, 2013
Generation Northern Islands Volcanic Islands
Production End-of-life End-of-life
Interface PCIe 2.0 x16 PCIe 3.0 x16
Predecessor Evergreen Sea Islands
Successor Southern Islands Pirate Islands

Clocks

GPU clock 700 MHz 700 MHz
Memory clock 667 MHz 1334 Mbps effective 900 MHz 1800 Mbps effective

Memory Configuration

Memory size 2 GB 1024 MB
Memory type GDDR3 DDR3
Memory bus width 128 bit 128 bit
Bandwidth 21.34 GB/s 28.80 GB/s

Render Configuration

Shading units 720 512
TMUs 36 32
ROPs 16 16
Compute units 9 8
Cache L1 8 KB (per CU) 16 KB (per CU)
Cache L2 256 KB 256 KB

Performance

Pixel rate 11.20 GPixel/s 11.20 GPixel/s
Texture rate 25.20 GTexel/s 22.40 GTexel/s
FP32 (float) performance 1,008 GFLOPS 716.8 GFLOPS
FP64 (double) performance 44.80 GFLOPS (1:16)

Dimensions & Outputs

Slot width Dual-slot Single-slot
Length 170 mm 6.7 inches 168 mm 6.6 inches
TDP 86 W 55 W
Suggested PSU 250 W 250 W
Outputs 2x DVI1x HDMI2x mini-DisplayPort 1x DVI1x HDMI1x DisplayPort
Power connectors None

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

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