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Differences What are the advantages of each

Front view of Radeon R9 280

Reasons to consider the
AMD Radeon R9 280

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GPUBoss is not aware of any important advantages of the Radeon R9 280 vs the Radeon HD 7950 Boost.

Front view of Radeon HD 7950 Boost

Reasons to consider the
AMD Radeon HD 7950 Boost

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Slightly higher clock speed 850 MHz vs 827 MHz Around 5% higher clock speed

Features Key features of the Radeon R9 280  vs HD 7950 Boost 

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

Radeon R9 280
26.5 GPixel/s
Radeon HD 7950 Boost
27.2 GPixel/s
Unfortunately, you can see we still fall short of that 60 FPS average; although, the 58 FPS average is indeed impressive.
Radeon R9 280 | by Shawn-Baker (Aug, 2014)

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

Radeon R9 280
92.6 GTexel/s
Radeon HD 7950 Boost
95.2 GTexel/s
At the highest resolution, we do see the card fall just short of that 60 FPS average, but considering our minimum is 48 FPS, we'd say the overall playability of the game is great.
Radeon R9 280 | by Shawn-Baker (Oct, 2014)

floating point performance How fast the gpu can crunch numbers

Radeon R9 280
2,964 GFLOPS
Radeon HD 7950 Boost
3,046 GFLOPS
Another feature is the the updated instruction set which introduces 16-bit floating point and integer instructions that help in low power compute (GPU) and media processing.
Radeon R9 280 | by hassan-mujtaba (Sep, 2014)

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

Despite these few leaked pictures, we still do not have precise specifications for the upcoming R9 285 graphics card as it is still not clear if it will have 1792 or 2048 Stream Processors.
Radeon R9 280 | by Slobodan-Simic (Aug, 2014)

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)

compute units Discrete cores within the GPU

From the block diagram previously posted, we got to know that the Tonga GPU houses eight ACE (Asynchronous Compute Units) compared to just two on Tahiti and each shader engine has its own geometry processor and a rasterizer unit which houses 8 Compute Units per block.
Radeon R9 280 | by hassan-mujtaba (Sep, 2014)

Specifications Full list of technical specs

gpu

Radeon R9 280  vs
HD 7950 Boost 
GPU brand AMD AMD
GPU name Tahiti Tahiti PRO
Market Desktop Desktop
Clock speed 827 MHz 850 MHz
Turbo clock speed 933 MHz 925 MHz
Is dual GPU No No
Reference card None None

raw performance

Shading units 1,792 1,792
Texture mapping units 112 112
Render output processors 32 32
Compute units 28 28
Pixel rate 26.5 GPixel/s 27.2 GPixel/s
Texture rate 92.6 GTexel/s 95.2 GTexel/s
Floating-point performance 2,964 GFLOPS 3,046 GFLOPS

memory

Radeon R9 280  vs
HD 7950 Boost 
Memory clock speed 1,250 MHz 1,250 MHz
Effective memory clock speed 5,000 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 200W 200W

Comments

Showing 4 comments.
You do realize that sapphire sells the 7950 boost for 220$ and is still superior to the more expensive 280 at 290$
Wow you are not kidding with them re badge this graphics and the problem is that the 7950 and 7970 have gone up so much in price it makes it hard justifying spending 400 on a 7950 when I can get a 7770 4gb and or pay 80 dollars more and buy myself a 780 or a 280x. I wish AMD had done things differently for these cards because right now I am trying to build my wife a newer and better gaming rig compared to her aging anthlon 4 core. She mostly plays WOW and she is a hardcore raider and in 25 man when you are a healer you cannot be getting lag and bad framerates like she has been getting. I was wondering for 220 limit what would you recommend for a gpu that can handle play the next expansion of WOWs graphics at 1080 during 25 man raid?
LOOOOOOL
why wait so long to just release a re badge amd disappointing!
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