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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
1
↑
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
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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