AMD Radeon HD 6870 vs AMD Radeon R9 M385
GPU Specs Compare
Graphics Card
Release Date
Oct 2010
May 2015
Generation
Northern Islands
Gem System
Type
Desktop
Mobile
Bus Interface
PCIe 2.0 x16
PCIe 3.0 x16
Clock Speeds
Memory Clock
1050 MHz
1200 MHz
Base Clock
-
900 MHz
Boost Clock
-
1000 MHz
Memory
Memory Size
1024MB
4GB
Memory Type
GDDR5
GDDR5
Memory Bus
256bit
128bit
Bandwidth
134.4GB/s
76.80GB/s
Render Config
Compute Units
14
14
Shading Units
1120
896
TMUs
56
56
ROPs
32
16
L1 Cache
8 KB (per CU)
16 KB (per CU)
L2 Cache
512 KB
256 KB
Theoretical Performance
Pixel Rate
28.80 GPixel/s
16.00 GPixel/s
Texture Rate
50.40 GTexel/s
56.00 GTexel/s
FP32 (float)
2.016 TFLOPS
1.792 TFLOPS
FP64 (double)
-
112.0 GFLOPS
Graphics Processor
GPU Name
Barts
Strato
GPU Variant
Barts XT(215-0798000)
Strato XT
Architecture
TeraScale 2
GCN 2.0
Foundry
TSMC
TSMC
Process Size
40 nm
28 nm
Transistors
1.7 billion
2.08 billion
Die Size
255 mm²
160 mm²
Board Design
TDP
151W
Unknown
Suggested PSU
450 W
-
Outputs
2x DVI1x HDMI 1.3a2x mini-DisplayPort 1.1
Portable Device Dependent
Power Connectors
2x 6-pin
-
Graphics Features
DirectX
11.2 (11_0)
12 (12_0)
OpenGL
4.4
4.6
OpenCL
1.2
2.1
Vulkan
N/A
1.2.170
Shader Model
5.0
6.5