AMD Radeon HD 6870 1600SP Edition vs AMD Radeon R9 280
GPU · Specs Compare
Graphics Card
Release Date
Jan 2013
Mar 2014
Generation
Northern Islands
Volcanic Islands
Type
Desktop
Desktop
Bus Interface
PCIe 2.0 x16
PCIe 3.0 x16
Clock Speeds
Memory Clock
1050 MHz
1250 MHz
Base Clock
—
827 MHz
Boost Clock
—
933 MHz
Memory
Memory Size
1024MB
3GB
Memory Type
GDDR5
GDDR5
Memory Bus
256bit
384bit
Bandwidth
134.4GB/s
240.0GB/s
Render Config
Compute Units
20
28
Shading Units
1600
1792
TMUs
80
112
ROPs
32
32
L1 Cache
8 KB (per CU)
16 KB (per CU)
L2 Cache
512 KB
768 KB
Theoretical Performance
Pixel Rate
27.20 GPixel/s
29.86 GPixel/s
Texture Rate
68.00 GTexel/s
104.5 GTexel/s
FP32 (float)
2.720 TFLOPS
3.344 TFLOPS
FP64 (double)
544.0 GFLOPS
836.0 GFLOPS
Graphics Processor
GPU Name
Cypress
Tahiti
GPU Variant
Cypress XT(215-0735033)
Tahiti PRO3(215-0821330)
Architecture
TeraScale 2
GCN 1.0
Foundry
TSMC
TSMC
Process Size
40 nm
28 nm
Transistors
2.154 billion
4.313 billion
Die Size
334 mm²
352 mm²
Board Design
TDP
175W
200W
Suggested PSU
450 W
550 W
Outputs
2x DVI1x HDMI 1.3a2x mini-DisplayPort 1.1
1x DVI2x HDMI 1.4a1x DisplayPort 1.2
Power Connectors
2x 6-pin
1x 6-pin + 1x 8-pin
Graphics Features
DirectX
11.2 (11_0)
12 (11_1)
OpenGL
4.4
4.6
OpenCL
1.2
1.2
Vulkan
N/A
1.2
Shader Model
5.0
5.1
▲ Specs Compare
Data sourced from official specifications and benchmark tests.