AMD Radeon HD 6770 Green Edition vs AMD Radeon R7 340 OEM

Table of Contents

Graphics Processor

GPU model Juniper Oland
GPU variant Juniper LE (215-0754009)
Architecture TeraScale 2 GCN 1.0
Foundry TSMC TSMC
Manufacturing process 40 nm 28 nm
Number of transistors 1,040 million 950 million
Die size 166 mm² 77 mm²

Graphics Card

Release date Apr 19th, 2013 May 5th, 2015
Generation Northern Islands Pirate Islands
Production End-of-life End-of-life
Interface PCIe 2.0 x16 PCIe 3.0 x8
Predecessor Evergreen Volcanic Islands
Successor Southern Islands Arctic Islands

Clocks

GPU clock 700 MHz
Memory clock 667 MHz 1334 Mbps effective 1000 MHz 4 Gbps effective
Base clock 730 MHz
Boost clock 780 MHz

Memory Configuration

Memory size 2 GB 2 GB
Memory type GDDR3 GDDR5
Memory bus width 128 bit 128 bit
Bandwidth 21.34 GB/s 64.00 GB/s

Render Configuration

Shading units 720 384
TMUs 36 24
ROPs 16 8
Compute units 9 6
Cache L1 8 KB (per CU) 16 KB (per CU)
Cache L2 256 KB 256 KB

Performance

Pixel rate 11.20 GPixel/s 6.240 GPixel/s
Texture rate 25.20 GTexel/s 18.72 GTexel/s
FP32 (float) performance 1,008 GFLOPS 599.0 GFLOPS
FP64 (double) performance 37.44 GFLOPS (1:16)

Dimensions & Outputs

Slot width Dual-slot Single-slot
Length 170 mm 6.7 inches
TDP 86 W 50 W
Suggested PSU 250 W 250 W
Outputs 2x DVI1x HDMI2x mini-DisplayPort 1x DVI1x HDMI1x VGA
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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