Comparison of Radeon HD 7990 and Radeon RX 580

Attribute	Radeon HD 7990 ×	Radeon RX 580 ×
GPU
Release year (year)	2013	2017
Reference card	AMD Radeon HD 7990 950 MHz 6 GB	-
GPU brand	AMD	AMD
GPU name	Malta	Polaris 20
Market	Desktop	-
Clock speed (MHz)	950	1,257
Turbo clock speed (MHz)	1,000	1,340
Is dual GPU	+	-
Model	Radeon HD 7990	Radeon RX 580
Memory
Memory (MB)	6,144	8,192
Memory bandwidth (GB/s)	576	256
Memory bus (bit)	768	256
Memory type	GDDR5	GDDR5
Memory clock speed (MHz)	1,500	2,000
Effective memory clock speed (MHz)	6,000	8,000
Noise and power
TDP (W)	375	185
Load power consumption (W)	573	-
Idle power consumption (W)	135	-
Load noise level (dB)	60	-
Idle noise level (dB)	43	-
Raw performance
Pixel rate (GPixel/s)	64	42.88
Render output processors	64	32
Texture mapping units	256	144
Shading units	4,096	2,304
Floating-point performance (GFLOPS)	8,192	6,175
Compute units	64	36
Texture rate (GTexel/s)	256	193
Benchmarks
Cloud Gate Factor	23	22.5
Face detection (mPixels/s)	90.43	116.37
T-Rex (GFXBench 3.0)	3356.38	3350.64
Manhattan (GFXBench 3.0)	3716.14	3709.21
Bitcoin mining (mHash/s)	458.53	607.72
Sky Diver Factor	393.8	441.03
Fire Strike Factor	75.52	75.63
Ocean surface simulation (frames/s)	1833.02	2007.61