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Differences What are the advantages of each

Front view of Radeon R9 280X

Reasons to consider the
Generic Radeon R9 280X

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Higher effective memory clock speed 6,000 MHz vs 5,000 MHz 20% higher effective memory clock speed
Slightly better floating-point performance 3,482 GFLOPS vs 2,964 GFLOPS More than 15% better floating-point performance
Higher turbo clock speed 1,000 MHz vs 933 MHz More than 5% higher turbo clock speed
Higher memory clock speed 1,500 MHz vs 1,250 MHz 20% higher memory clock speed
Front view of Radeon R9 280

Reasons to consider the
AMD Radeon R9 280

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Lower TDP 200W vs 250W 20% lower TDP

Features Key features of the Radeon R9 280X  vs 280 

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

Radeon R9 280X
27.2 GPixel/s
Radeon R9 280
26.5 GPixel/s
The Curacao Pro ended up faster than the Radeon HD 7870 in a previous performance overview so its easy to say that the Curacao XT based R9 270X would be much faster and trade blows with the Radeon HD 7950.
Radeon R9 280 | by hassan-mujtaba (Sep, 2013)

floating point performance How fast the gpu can crunch numbers

Radeon R9 280X
3,482 GFLOPS
Radeon R9 280
2,964 GFLOPS
The R9 290X’s 55% fan speed “Uber” mode is high enough to prevent GPU throttling in workloads, even under sustained load.
Radeon R9 280 | by Joel-Hruska (Nov, 2013)

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

The rest of the card specifications confirmed include the $139 Radeon R7 260X which is a Radeon HD 7790 rebrand featuring 896 Stream processors, 16 ROPs, 56 TMUs and a 2 GB GDDR5 memory running across a 128-bit wide memory interface.
Radeon R9 280 | by hassan-mujtaba (Oct, 2013)

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

The Radeon R9 280X is based on the 28nm Tahiti die featuring 2048 Stream processors, 128 Texture mapping units and 32 Raster Operators.
Radeon R9 280 | by hassan-mujtaba (Oct, 2013)

render output processors GPU commponents responsible for transform pixels as they flow between memory buffers

ASUS Radeon R9 280X DirectCU II TOP is based on the Tahiti XT die, featuring 2048 cores, 128 TMUs and 32 ROPs.
Radeon R9 280 | by hassan-mujtaba (Oct, 2013)

compute units Discrete cores within the GPU

Specifications Full list of technical specs

gpu

Radeon R9 280X  vs
280 
GPU brand AMD AMD
GPU name Tahiti Tahiti
Market Desktop Desktop
Clock speed 850 MHz 827 MHz
Turbo clock speed 1,000 MHz 933 MHz
Is dual GPU No No
Reference card AMD Radeon R9 280X 850 MHz 3 GB None

raw performance

Shading units 2,048 1,792
Texture mapping units 128 112
Render output processors 32 32
Compute units 32 28
Pixel rate 27.2 GPixel/s 26.5 GPixel/s
Floating-point performance 3,482 GFLOPS 2,964 GFLOPS

memory

Radeon R9 280X  vs
280 
Memory clock speed 1,500 MHz 1,250 MHz
Effective memory clock speed 6,000 MHz 5,000 MHz
Memory bus 384 bit 384 bit
Memory 3,072 MB 3,072 MB
Memory type GDDR5 GDDR5

noise and power

TDP 250W 200W

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Comments

Showing 2 comments.
Hi, i want to buy the R9 280 but i got pci 2.0 and cpu i7 920 with 6gb ram (tripple channel) is it worth or there would be a lot of bottleneck?
Considering the 280x costs 300€ and the 280 200€, there is no real advantage going with the first :P
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