AMD Radeon HD 6450 vs AMD Radeon HD 7850

Table of Contents

Graphics Processor

GPU model Caicos Pitcairn
GPU variant Caicos PRO Pitcairn PRO (215-0828062)
Architecture TeraScale 2 GCN 1.0
Foundry TSMC TSMC
Manufacturing process 40 nm 28 nm
Number of transistors 370 million 2,800 million
Die size 67 mm² 212 mm²

Graphics Card

Release date Apr 7th, 2011 Mar 5th, 2012
Generation Northern Islands Southern Islands
Production End-of-life End-of-life
Launch price 55 USD 249 USD
Interface PCIe 2.0 x16 PCIe 3.0 x16
Reviews 14 in our database 71 in our database
Predecessor Evergreen Northern Islands
Successor Southern Islands Sea Islands

Clocks

GPU clock 625 MHz 860 MHz
Memory clock 800 MHz 3.2 Gbps effective 1200 MHz 4.8 Gbps effective

Memory Configuration

Memory size 512 MB 2 GB
Memory type GDDR5 GDDR5
Memory bus width 64 bit 256 bit
Bandwidth 25.60 GB/s 153.6 GB/s

Render Configuration

Shading units 160 1024
TMUs 8 64
ROPs 4 32
Compute units 2 16
Cache L1 8 KB (per CU) 16 KB (per CU)
Cache L2 128 KB 512 KB

Performance

Pixel rate 2.500 GPixel/s 27.52 GPixel/s
Texture rate 5.000 GTexel/s 55.04 GTexel/s
FP32 (float) performance 200.0 GFLOPS 1.761 TFLOPS
FP64 (double) performance 110.1 GFLOPS (1:16)

Dimensions & Outputs

Slot width Single-slot Dual-slot
Length 168 mm 6.6 inches 210 mm 8.3 inches
TDP 18 W 130 W
Suggested PSU 200 W 300 W
Outputs 1x DVI1x HDMI1x VGA 1x DVI1x HDMI2x mini-DisplayPort
Power connectors None 1x 6-pin
Board number C264 C401-47

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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