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