AMD Radeon HD 6850 vs AMD Radeon R9 390
GPU · Specs Compare
Graphics Card
Release Date
Oct 2010
Jun 2015
Generation
Northern Islands
Pirate Islands
Type
Desktop
Desktop
Bus Interface
PCIe 2.0 x16
PCIe 3.0 x16
Clock Speeds
Memory Clock
1000 MHz
1500 MHz
Memory
Memory Size
1024MB
8GB
Memory Type
GDDR5
GDDR5
Memory Bus
256bit
512bit
Bandwidth
128.0GB/s
384.0GB/s
Render Config
Compute Units
12
40
Shading Units
960
2560
TMUs
48
160
ROPs
32
64
L1 Cache
8 KB (per CU)
16 KB (per CU)
L2 Cache
512 KB
1024 KB
Theoretical Performance
Pixel Rate
24.80 GPixel/s
64.00 GPixel/s
Texture Rate
37.20 GTexel/s
160.0 GTexel/s
FP32 (float)
1488 GFLOPS
5.120 TFLOPS
FP64 (double)
—
640.0 GFLOPS
Graphics Processor
GPU Name
Barts
Grenada
GPU Variant
Barts PRO(215-0798006)
Grenada PRO(215-0880030)
Architecture
TeraScale 2
GCN 2.0
Foundry
TSMC
TSMC
Process Size
40 nm
28 nm
Transistors
1.7 billion
6.2 billion
Die Size
255 mm²
438 mm²
Board Design
TDP
127W
275W
Suggested PSU
300 W
600 W
Outputs
2x DVI1x HDMI 1.3a2x mini-DisplayPort 1.1
2x DVI1x HDMI 1.4a1x DisplayPort 1.2
Power Connectors
1x 6-pin
1x 6-pin + 1x 8-pin
Graphics Features
DirectX
11.2 (11_0)
12 (12_0)
OpenGL
4.4
4.6
OpenCL
1.2
2.0
Vulkan
N/A
1.2
Shader Model
5.0
6.3
Benchmark
3DMark Time Spy
—
3,964
3DMark Time Spy Extreme
—
1,931
▲ Specs Compare
Data sourced from official specifications and benchmark tests.