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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
1
↑
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
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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