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