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Differences What are the advantages of each

Front view of Radeon HD 8550

Reasons to consider the
AMD Radeon HD 8550

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Slightly more shading units 480 vs 384 96 more shading units
Front view of GeForce GTX 745

Reasons to consider the
Nvidia GeForce GTX 745

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Significantly higher clock speed 1,033 MHz vs 650 MHz Around 60% higher clock speed
More memory 4,096 MB vs 1,024 MB 4x more memory
Higher pixel rate 16.53 GPixel/s vs 5.2 GPixel/s Around 3.2x higher pixel rate
More render output processors 16 vs 8 Twice as many render output processors
Higher memory clock speed 900 MHz vs 800 MHz Around 15% higher memory clock speed

Features Key features of the Radeon HD 8550  vs GeForce GTX 745 

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

Radeon HD 8550
25.6 GB/s
GeForce GTX 745
28.8 GB/s

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

Radeon HD 8550
5.2 GPixel/s
GeForce GTX 745
16.53 GPixel/s

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

Radeon HD 8550
15.6 GTexel/s
GeForce GTX 745
24.79 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon HD 8550
624 GFLOPS
GeForce GTX 745
793.3 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 8550  vs
GeForce GTX 745 
GPU brand AMD Nvidia
GPU name Turks GM107
Market Desktop Desktop
Clock speed 650 MHz 1,033 MHz
Is dual GPU No No
Reference card None None

raw performance

Shading units 480 384
Texture mapping units 24 24
Render output processors 8 16
Pixel rate 5.2 GPixel/s 16.53 GPixel/s
Texture rate 15.6 GTexel/s 24.79 GTexel/s
Floating-point performance 624 GFLOPS 793.3 GFLOPS

memory

Radeon HD 8550  vs
GeForce GTX 745 
Memory clock speed 800 MHz 900 MHz
Effective memory clock speed 1,600 MHz 1,800 MHz
Memory bus 128 bit 128 bit
Memory 1,024 MB 4,096 MB
Memory type GDDR3 DDR3
Memory bandwidth 25.6 GB/s 28.8 GB/s

noise and power

TDP 60W 55W

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