AMD Radeon R9 270 1024SP vs AMD Radeon HD 6870
GPU · Specs Compare
Graphics Card
Release Date
Mar 2015
Oct 2010
Generation
Volcanic Islands
Northern Islands
Type
Desktop
Desktop
Bus Interface
PCIe 3.0 x16
PCIe 2.0 x16
Clock Speeds
Base Clock
900 MHz
—
Boost Clock
925 MHz
—
Memory Clock
1200 MHz
1050 MHz
Memory
Memory Size
2GB
1024MB
Memory Type
GDDR5
GDDR5
Memory Bus
256bit
256bit
Bandwidth
153.6GB/s
134.4GB/s
Render Config
Compute Units
16
14
Shading Units
1024
1120
TMUs
64
56
ROPs
32
32
L1 Cache
16 KB (per CU)
8 KB (per CU)
L2 Cache
512 KB
512 KB
Theoretical Performance
Pixel Rate
29.60 GPixel/s
28.80 GPixel/s
Texture Rate
59.20 GTexel/s
50.40 GTexel/s
FP32 (float)
1.894 TFLOPS
2.016 TFLOPS
FP64 (double)
118.4 GFLOPS
—
Graphics Processor
GPU Name
Pitcairn
Barts
GPU Variant
Pitcairn PRO(215-0828062)
Barts XT(215-0798000)
Architecture
GCN 1.0
TeraScale 2
Foundry
TSMC
TSMC
Process Size
28 nm
40 nm
Transistors
2.8 billion
1.7 billion
Die Size
212 mm²
255 mm²
Board Design
TDP
150W
151W
Suggested PSU
450 W
450 W
Outputs
2x DVI1x HDMI 1.4a1x DisplayPort 1.2
2x DVI1x HDMI 1.3a2x mini-DisplayPort 1.1
Power Connectors
1x 6-pin
2x 6-pin
Graphics Features
DirectX
12 (11_1)
11.2 (11_0)
OpenGL
4.6
4.4
OpenCL
1.2
1.2
Vulkan
1.2
N/A
Shader Model
5.1
5.0
▲ Specs Compare
Data sourced from official specifications and benchmark tests.