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GPU Comparison
AMD Radeon R9 285 vs AMD Radeon R9 280X2
AMD Radeon R9 285 vs AMD Radeon R9 280X2
VS
AMD Radeon R9 285
AMD Radeon R9 280X2
We compared two Desktop platform GPUs: 2GB VRAM Radeon R9 285 and 3GB VRAM Radeon R9 280X2 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
AMD Radeon R9 285 's Advantages
Lower TDP (190W vs 375W)
AMD Radeon R9 280X2 's Advantages
Boost Clock1000MHz
More VRAM (3GB vs 2GB)
Larger VRAM bandwidth (288.0GB/s vs 176.0GB/s)
256 additional rendering cores
Score
Benchmark
FP32 (float)
Radeon R9 285
3.29 TFLOPS
Radeon R9 280X2
+24%
4.096 TFLOPS
Radeon R9 285
VS
Radeon R9 280X2
Graphics Card
Sep 2014
Release Date
Unknown
Volcanic Islands
Generation
Volcanic Islands
Desktop
Type
Desktop
PCIe 3.0 x16
Bus Interface
PCIe 3.0 x16
Clock Speeds
-
Base Clock
950 MHz
-
Boost Clock
1000 MHz
1375 MHz
Memory Clock
1500 MHz
Memory
2GB
Memory Size
3GB
GDDR5
Memory Type
GDDR5
256bit
Memory Bus
384bit
176.0GB/s
Bandwidth
288.0GB/s
Render Config
-
SM Count
-
28
Compute Units
32
1792
Shading Units
2048
112
TMUs
128
32
ROPs
32
-
Tensor Cores
-
-
RT Cores
-
16 KB (per CU)
L1 Cache
16 KB (per CU)
512 KB
L2 Cache
768 KB
Theoretical Performance
29.38 GPixel/s
Pixel Rate
32.00 GPixel/s
102.8 GTexel/s
Texture Rate
128.0 GTexel/s
3.290 TFLOPS
FP16 (half)
-
3.290 TFLOPS
FP32 (float)
4.096 TFLOPS
205.6 GFLOPS
FP64 (double)
1024 GFLOPS
Graphics Processor
Tonga
GPU Name
Tahiti
Tonga PRO (215-0851128)
GPU Variant
Tahiti XTL (215-0821065)
GCN 3.0
Architecture
GCN 1.0
TSMC
Foundry
TSMC
28 nm
Process Size
28 nm
5 billion
Transistors
4.313 billion
366 mm²
Die Size
352 mm²
Board Design
190W
TDP
375W
450 W
Suggested PSU
750 W
2x DVI 1x HDMI 1.4a 1x DisplayPort 1.2
Outputs
6x mini-DisplayPort 1.2
2x 6-pin
Power Connectors
3x 8-pin
Graphics Features
12 (12_0)
DirectX
12 (11_1)
4.6
OpenGL
4.6
2.1
OpenCL
1.2
1.2.170
Vulkan
1.2
-
CUDA
-
6.5
Shader Model
5.1
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