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/ Comparison of Radeon HD 7870 XT and Radeon R9 285
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Comparison of Radeon HD 7870 XT and Radeon R9 285
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Attribute
Radeon HD 7870 XT
×
Radeon R9 285
×
GPU
Release year (year)
2012
2014
Reference card
-
AMD Radeon R9 285 918 MHz 2 GB
GPU brand
AMD
AMD
GPU name
Tahiti LE
Tonga
Market
Desktop
Desktop
Clock speed (MHz)
925
918
Turbo clock speed (MHz)
975
1,000
Is dual GPU
-
-
Model
Radeon HD 7870 XT
Radeon R9 285
Memory
Memory (MB)
2,048
2,048
Memory bandwidth (GB/s)
192
176
Memory bus (bit)
256
256
Memory type
GDDR5
GDDR5
Memory clock speed (MHz)
1,500
1,375
Effective memory clock speed (MHz)
6,000
5,500
Noise and power
1
↑
TDP (W)
185
190
Raw performance
Pixel rate (GPixel/s)
31.2
29.38
Render output processors
32
32
Texture mapping units
96
112
Shading units
1,536
1,792
Floating-point performance (GFLOPS)
2,995
3,290
Compute units
24
28
Texture rate (GTexel/s)
93.6
102.8
Benchmarks
Metro: Last Light
79.5
-
FarCry 3
-
35
Battlefield 3
72
-
Face detection (mPixels/s)
65.4
72.8
T-Rex (GFXBench 3.0)
3350.68
3355.84
Manhattan (GFXBench 3.0)
3705.76
3715.04
Bitcoin mining (mHash/s)
345.79
391.4
Sky Diver Factor
314
344.37
Fire Strike Factor
47.56
50.84
Ocean surface simulation (frames/s)
-
1474.63
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