AMD Radeon HD 6770M vs AMD Radeon HD 8850M

Table of Contents

Graphics Processor

GPU model Whistler Venus
GPU variant Whistler XT (216-0810001) Venus PRO
Architecture TeraScale 2 GCN 1.0
Foundry TSMC TSMC
Manufacturing process 40 nm 28 nm
Number of transistors 716 million 1,500 million
Die size 104 mm² 123 mm²

Mobile graphics

Release date Jan 4th, 2011 Apr 1st, 2013
Generation Vancouver (HD 6700M) Solar System (HD 8800M)
Production End-of-life End-of-life
Interface MXM-A (3.0) PCIe 3.0 x16
Predecessor Manhattan London
Successor London Crystal System

Clocks

GPU clock 725 MHz
Memory clock 900 MHz 3.6 Gbps effective 1000 MHz 2 Gbps effective
Base clock 575 MHz
Boost clock 625 MHz

Memory Configuration

Memory size 1024 MB 2 GB
Memory type GDDR5 DDR3
Memory bus width 128 bit 128 bit
Bandwidth 57.60 GB/s 32.00 GB/s

Render Configuration

Shading units 480 640
TMUs 24 40
ROPs 8 16
Compute units 6 10
Cache L1 8 KB (per CU) 16 KB (per CU)
Cache L2 256 KB 256 KB

Performance

Pixel rate 5.800 GPixel/s 10.00 GPixel/s
Texture rate 17.40 GTexel/s 25.00 GTexel/s
FP32 (float) performance 696.0 GFLOPS 800.0 GFLOPS
FP64 (double) performance 50.00 GFLOPS (1:16)

Dimensions & Outputs

Slot width MXM Module
TDP 35 W unknown
Outputs No outputs No outputs

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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