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/ Comparison of Radeon R9 285 and Radeon R9 280
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Comparison of Radeon R9 285 and Radeon R9 280
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Attribute
Radeon R9 280
×
Radeon R9 285
×
GPU
Release year (year)
2014
2014
Reference card
-
AMD Radeon R9 285 918 MHz 2 GB
GPU brand
AMD
AMD
GPU name
Tahiti
Tonga
Market
Desktop
Desktop
Clock speed (MHz)
827
918
Turbo clock speed (MHz)
933
1,000
Is dual GPU
-
-
Model
Radeon R9 280
Radeon R9 285
Memory
Memory (MB)
3,072
2,048
Memory bandwidth (GB/s)
240
176
Memory bus (bit)
384
256
Memory type
GDDR5
GDDR5
1
↑
Memory clock speed (MHz)
1,250
1,375
Effective memory clock speed (MHz)
5,000
5,500
Noise and power
TDP (W)
200
190
Raw performance
Pixel rate (GPixel/s)
29.86
29.38
Render output processors
32
32
Texture mapping units
112
112
Shading units
1,792
1,792
Floating-point performance (GFLOPS)
3,344
3,290
Compute units
28
28
Texture rate (GTexel/s)
104.5
102.8
Benchmarks
FarCry 3
-
35
Dirt3
92
-
Face detection (mPixels/s)
80.47
72.8
T-Rex (GFXBench 3.0)
3356.46
3355.84
Manhattan (GFXBench 3.0)
3713.26
3715.04
Bitcoin mining (mHash/s)
365.38
391.4
Sky Diver Factor
336.33
344.37
Fire Strike Factor
55.14
50.84
Ocean surface simulation (frames/s)
1687.03
1474.63
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