AMD Radeon R9 285 vs AMD Radeon R9 270 1024SP
GPU · Specs Compare
Graphics Card
Release Date
Sep 2014
Mar 2015
Generation
Volcanic Islands
Volcanic Islands
Type
Desktop
Desktop
Bus Interface
PCIe 3.0 x16
PCIe 3.0 x16
Clock Speeds
Memory Clock
1375 MHz
1200 MHz
Base Clock
—
900 MHz
Boost Clock
—
925 MHz
Memory
Memory Size
2GB
2GB
Memory Type
GDDR5
GDDR5
Memory Bus
256bit
256bit
Bandwidth
176.0GB/s
153.6GB/s
Render Config
Compute Units
28
16
Shading Units
1792
1024
TMUs
112
64
ROPs
32
32
L1 Cache
16 KB (per CU)
16 KB (per CU)
L2 Cache
512 KB
512 KB
Theoretical Performance
Pixel Rate
29.38 GPixel/s
29.60 GPixel/s
Texture Rate
102.8 GTexel/s
59.20 GTexel/s
FP16 (half)
3.290 TFLOPS
—
FP32 (float)
3.290 TFLOPS
1.894 TFLOPS
FP64 (double)
205.6 GFLOPS
118.4 GFLOPS
Graphics Processor
GPU Name
Tonga
Pitcairn
GPU Variant
Tonga PRO(215-0851128)
Pitcairn PRO(215-0828062)
Architecture
GCN 3.0
GCN 1.0
Foundry
TSMC
TSMC
Process Size
28 nm
28 nm
Transistors
5 billion
2.8 billion
Die Size
366 mm²
212 mm²
Board Design
TDP
190W
150W
Suggested PSU
450 W
450 W
Outputs
2x DVI1x HDMI 1.4a1x DisplayPort 1.2
2x DVI1x HDMI 1.4a1x DisplayPort 1.2
Power Connectors
2x 6-pin
1x 6-pin
Graphics Features
DirectX
12 (12_0)
12 (11_1)
OpenGL
4.6
4.6
OpenCL
2.1
1.2
Vulkan
1.2.170
1.2
Shader Model
6.5
5.1
▲ Specs Compare
Data sourced from official specifications and benchmark tests.