Comparison of Radeon R9 280 and AMD Radeon HD

Attribute	Radeon R9 280 ×	AMD Radeon HD - FirePro D500 Compute Engine ×
GPU
Release year (year)	2014	2014
GPU brand	AMD	AMD
GPU name	Tahiti	Tahiti
Market	Desktop	-
Clock speed (MHz)	827	725
Turbo clock speed (MHz)	933	-
Is dual GPU	-	-
Model	Radeon R9 280	AMD Radeon HD - FirePro D500 Compute Engine
Memory
Memory (MB)	3,072	3,072
Memory bandwidth (GB/s)	240	243.8
Memory bus (bit)	384	384
Memory type	GDDR5	GDDR5
Memory clock speed (MHz)	1,250	1,270
Effective memory clock speed (MHz)	5,000	5,080
Noise and power
TDP (W)	200	274
Raw performance
Pixel rate (GPixel/s)	29.86	23.2
Render output processors	32	32
Texture mapping units	112	96
Shading units	1,792	1,536
Floating-point performance (GFLOPS)	3,344	2,227
Compute units	28	24
Texture rate (GTexel/s)	104.5	69.6
Benchmarks
Particle simulation (mInteraction/s)	-	423.04
T-Rex (Compubench 1.5) (frames/s)	-	4.57
Video composition (frames/s)	-	70.94
Dirt3	92	-
Face detection (mPixels/s)	80.47	47.2
T-Rex (GFXBench 3.0)	3356.46	3349.52
Manhattan (GFXBench 3.0)	3713.26	3632.24
Bitcoin mining (mHash/s)	365.38	259.37
Sky Diver Factor	336.33	-
Fire Strike Factor	55.14	-
Ocean surface simulation (frames/s)	1687.03	1045.53