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/ Comparison of Radeon R9 285 and Radeon R9 280X
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Comparison of Radeon R9 285 and Radeon R9 280X
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Attribute
Radeon R9 285
×
Radeon R9 280X
×
GPU
Release year (year)
2014
2013
Reference card
AMD Radeon R9 285 918 MHz 2 GB
AMD Radeon R9 280X 850 MHz 3 GB
GPU brand
AMD
AMD
GPU name
Tonga
Tahiti
Market
Desktop
Desktop
Clock speed (MHz)
918
850
Turbo clock speed (MHz)
1,000
1,000
Is dual GPU
-
-
Model
Radeon R9 285
Radeon R9 280X
Memory
Memory (MB)
2,048
3,072
Memory bandwidth (GB/s)
176
288
Memory bus (bit)
256
384
Memory type
GDDR5
GDDR5
Memory clock speed (MHz)
1,375
1,500
Effective memory clock speed (MHz)
5,500
6,000
Noise and power
TDP (W)
190
250
Raw performance
1
↑
Pixel rate (GPixel/s)
29.38
32
Render output processors
32
32
Texture mapping units
112
128
Shading units
1,792
2,048
Floating-point performance (GFLOPS)
3,290
4,096
Compute units
28
32
Texture rate (GTexel/s)
102.8
128
Benchmarks
FarCry 3
35
-
Battlefield 4
-
39.9
Face detection (mPixels/s)
72.8
95.62
T-Rex (GFXBench 3.0)
3355.84
3356.04
Manhattan (GFXBench 3.0)
3715.04
3709.16
Bitcoin mining (mHash/s)
391.4
468.39
Sky Diver Factor
344.37
380.99
Thief
-
33.6
Fire Strike Factor
50.84
62.73
Ocean surface simulation (frames/s)
1474.63
-
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