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Differences What are the advantages of each

Front view of Radeon RX Vega 64 Nano

Reasons to consider the
AMD Radeon RX Vega 64 Nano

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Much better floating-point performance 10,215 GFLOPS vs 4,096 GFLOPS Around 2.5x better floating-point performance
Significantly higher clock speed 1,156 MHz vs 850 MHz More than 35% higher clock speed
Significantly more memory 8,192 MB vs 3,072 MB Around 2.8x more memory
Much higher texture rate 319.2 GTexel/s vs 128 GTexel/s Around 2.5x higher texture rate
Higher memory bandwidth 409.6 GB/s vs 288 GB/s More than 40% higher memory bandwidth
Significantly higher pixel rate 79.81 GPixel/s vs 32 GPixel/s Around 2.5x higher pixel rate
Significantly more shading units 4,096 vs 2,048 Twice as many shading units
Significantly more texture mapping units 256 vs 128 Twice as many texture mapping units
Much wider memory bus 2,048 bit vs 384 bit More than 5.2x wider memory bus
Significantly more render output processors 64 vs 32 Twice as many render output processors
Significantly more compute units 64 vs 32 Twice as many compute units
Higher turbo clock speed 1,247 MHz vs 1,000 MHz Around 25% higher turbo clock speed
Front view of Radeon R9 280X

Reasons to consider the
Generic Radeon R9 280X

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Much higher effective memory clock speed 6,000 MHz vs 1,600 MHz 3.8x higher effective memory clock speed
Significantly higher memory clock speed 1,500 MHz vs 800 MHz Around 90% higher memory clock speed

Features Key features of the Radeon RX Vega 64 Nano  vs R9 280X 

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

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

Radeon RX Vega 64 Nano
79.81 GPixel/s
Radeon R9 280X
32 GPixel/s

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

Radeon RX Vega 64 Nano
319.2 GTexel/s
Radeon R9 280X
128 GTexel/s

floating point performance How fast the gpu can crunch numbers

Radeon RX Vega 64 Nano
10,215 GFLOPS
Radeon R9 280X
4,096 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 RX Vega 64 Nano  vs
R9 280X 
GPU brand AMD AMD
GPU name Vega 10 Tahiti
Clock speed 1,156 MHz 850 MHz
Turbo clock speed 1,247 MHz 1,000 MHz
Is dual GPU No No
Reference card None AMD Radeon R9 280X 850 MHz 3 GB

raw performance

Shading units 4,096 2,048
Texture mapping units 256 128
Render output processors 64 32
Compute units 64 32
Pixel rate 79.81 GPixel/s 32 GPixel/s
Texture rate 319.2 GTexel/s 128 GTexel/s
Floating-point performance 10,215 GFLOPS 4,096 GFLOPS

memory

Radeon RX Vega 64 Nano  vs
R9 280X 
Memory clock speed 800 MHz 1,500 MHz
Effective memory clock speed 1,600 MHz 6,000 MHz
Memory bus 2,048 bit 384 bit
Memory 8,192 MB 3,072 MB
Memory bandwidth 409.6 GB/s 288 GB/s

noise and power

TDP 250W 250W

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