AMD Radeon R9 280X2 vs AMD Radeon R9 285
GPU Specs Compare
Graphics Card
Release Date
Unknown
Sep 2014
Generation
Volcanic Islands
Volcanic Islands
Type
Desktop
Desktop
Bus Interface
PCIe 3.0 x16
PCIe 3.0 x16
Clock Speeds
Base Clock
950 MHz
-
Boost Clock
1000 MHz
-
Memory Clock
1500 MHz
1375 MHz
Memory
Memory Size
3GB
2GB
Memory Type
GDDR5
GDDR5
Memory Bus
384bit
256bit
Bandwidth
288.0GB/s
176.0GB/s
Render Config
Compute Units
32
28
Shading Units
2048
1792
TMUs
128
112
ROPs
32
32
L1 Cache
16 KB (per CU)
16 KB (per CU)
L2 Cache
768 KB
512 KB
Theoretical Performance
Pixel Rate
32.00 GPixel/s
29.38 GPixel/s
Texture Rate
128.0 GTexel/s
102.8 GTexel/s
FP32 (float)
4.096 TFLOPS
3.290 TFLOPS
FP64 (double)
1024 GFLOPS
205.6 GFLOPS
FP16 (half)
-
3.290 TFLOPS
Graphics Processor
GPU Name
Tahiti
Tonga
GPU Variant
Tahiti XTL(215-0821065)
Tonga PRO(215-0851128)
Architecture
GCN 1.0
GCN 3.0
Foundry
TSMC
TSMC
Process Size
28 nm
28 nm
Transistors
4.313 billion
5 billion
Die Size
352 mm²
366 mm²
Board Design
TDP
375W
190W
Suggested PSU
750 W
450 W
Outputs
6x mini-DisplayPort 1.2
2x DVI1x HDMI 1.4a1x DisplayPort 1.2
Power Connectors
3x 8-pin
2x 6-pin
Graphics Features
DirectX
12 (11_1)
12 (12_0)
OpenGL
4.6
4.6
OpenCL
1.2
2.1
Vulkan
1.2
1.2.170
Shader Model
5.1
6.5