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Differences What are the advantages of each

Front view of Radeon HD 3690

Reasons to consider the
ATi Radeon HD 3690

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More render output processors 16 vs 4 12 more render output processors
Slightly higher pixel rate 10.72 GPixel/s vs 2.9 GPixel/s Around 3.8x higher pixel rate
Slightly more shading units 320 vs 120 200 more shading units
Front view of Radeon HD 3650

Reasons to consider the
Sapphire Radeon HD 3650

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Slightly higher clock speed 725 MHz vs 670 MHz Around 10% higher clock speed
Slightly lower TDP 65W vs 75W Around 15% lower TDP

Features Key features of the Radeon HD 3690  vs 3650 

memory bandwidth Rate at which data can be read from or stored in onboard memory

Radeon HD 3690
26.56 GB/s
Radeon HD 3650
25.6 GB/s

pixel rate Number of pixels a graphics card can render to the screen every second

Radeon HD 3690
10.72 GPixel/s
Radeon HD 3650
2.9 GPixel/s

texture rate Speed at which a graphics card can perform texture mapping

Radeon HD 3690
10.72 GTexel/s
Radeon HD 3650
5.8 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon HD 3690
428.8 GFLOPS
Radeon HD 3650
174 GFLOPS

shading units Subcomponents of the gpu, these run in parallel to enable fast pixel shading

texture mapping units Built into each gpu, these resize and rotate bitmaps for texturing scenes

Specifications Full list of technical specs

gpu

Radeon HD 3690  vs
3650 
GPU brand ATI ATI
GPU name RV670 RV635
Market Desktop Desktop
Clock speed 670 MHz 725 MHz
Is dual GPU No No
Reference card None ATi Radeon HD 3650 725 MHz 256 MB

raw performance

Shading units 320 120
Texture mapping units 16 8
Render output processors 16 4
Compute units 4 3
Pixel rate 10.72 GPixel/s 2.9 GPixel/s
Texture rate 10.72 GTexel/s 5.8 GTexel/s
Floating-point performance 428.8 GFLOPS 174 GFLOPS

memory

Radeon HD 3690  vs
3650 
Memory clock speed 830 MHz 800 MHz
Effective memory clock speed 1,660 MHz 1,600 MHz
Memory bus 128 bit 128 bit
Memory 256 MB 512 MB
Memory type GDDR3 DDR2
Memory bandwidth 26.56 GB/s 25.6 GB/s

noise and power

TDP 75W 65W

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