AMD Radeon R9 280X vs AMD Radeon HD 6870 X2
GPU Specs Compare
Graphics Card
Release Date
Oct 2013
Jul 2011
Generation
Volcanic Islands
Northern Islands
Type
Desktop
Desktop
Bus Interface
PCIe 3.0 x16
PCIe 2.0 x16
Clock Speeds
Base Clock
850 MHz
-
Boost Clock
1000 MHz
-
Memory Clock
1500 MHz
1050 MHz
Memory
Memory Size
3GB
1024MB
Memory Type
GDDR5
GDDR5
Memory Bus
384bit
256bit
Bandwidth
288.0GB/s
134.4GB/s
Render Config
Compute Units
32
14
Shading Units
2048
1120
TMUs
128
56
ROPs
32
32
L1 Cache
16 KB (per CU)
8 KB (per CU)
L2 Cache
768 KB
512 KB
Theoretical Performance
Pixel Rate
32.00 GPixel/s
28.80 GPixel/s
Texture Rate
128.0 GTexel/s
50.40 GTexel/s
FP32 (float)
4.096 TFLOPS
2.016 TFLOPS
FP64 (double)
1024 GFLOPS
-
Graphics Processor
GPU Name
Tahiti
Barts
GPU Variant
Tahiti XTL(215-0821065)
Barts XT(215-0798000)
Architecture
GCN 1.0
TeraScale 2
Foundry
TSMC
TSMC
Process Size
28 nm
40 nm
Transistors
4.313 billion
1.7 billion
Die Size
352 mm²
255 mm²
Board Design
TDP
250W
300W
Suggested PSU
600 W
700 W
Outputs
2x DVI1x HDMI 1.4a1x DisplayPort 1.2
2x DVI1x HDMI 1.3a2x mini-DisplayPort 1.1
Power Connectors
1x 6-pin + 1x 8-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