Home GPU Comparison AMD Radeon R9 280 vs AMD Radeon HD 6870 X2

AMD Radeon R9 280 vs AMD Radeon HD 6870 X2

We compared two Desktop platform GPUs: 3GB VRAM Radeon R9 280 and 1024MB VRAM Radeon HD 6870 X2 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.

Main Differences

AMD Radeon R9 280 's Advantages
Released 2 years and 8 months late
Boost Clock933MHz
More VRAM (3GB vs 1024GB)
Larger VRAM bandwidth (240.0GB/s vs 134.4GB/s)
672 additional rendering cores
Lower TDP (200W vs 300W)

Score

Benchmark

FP32 (float)
Radeon R9 280 +65%
3.344 TFLOPS
Radeon HD 6870 X2
2.016 TFLOPS
VS

Graphics Card

Mar 2014
Release Date
Jul 2011
Volcanic Islands
Generation
Northern Islands
Desktop
Type
Desktop
PCIe 3.0 x16
Bus Interface
PCIe 2.0 x16

Clock Speeds

827 MHz
Base Clock
-
933 MHz
Boost Clock
-
1250 MHz
Memory Clock
1050 MHz

Memory

3GB
Memory Size
1024MB
GDDR5
Memory Type
GDDR5
384bit
Memory Bus
256bit
240.0GB/s
Bandwidth
134.4GB/s

Render Config

28
Compute Units
14
-
-
-
1792
Shading Units
1120
112
TMUs
56
32
ROPs
32
-
-
-
-
-
-
16 KB (per CU)
L1 Cache
8 KB (per CU)
768 KB
L2 Cache
512 KB
-
-
-

Theoretical Performance

29.86 GPixel/s
Pixel Rate
28.80 GPixel/s
104.5 GTexel/s
Texture Rate
50.40 GTexel/s
-
-
-
3.344 TFLOPS
FP32 (float)
2.016 TFLOPS
836.0 GFLOPS
FP64 (double)
-

Board Design

200W
TDP
300W
550 W
Suggested PSU
700 W
1x DVI 2x HDMI 1.4a 1x DisplayPort 1.2
Outputs
2x DVI 1x HDMI 1.3a 2x mini-DisplayPort 1.1
1x 6-pin + 1x 8-pin
Power Connectors
-

Graphics Processor

Tahiti
GPU Name
Barts
Tahiti PRO3 (215-0821330)
GPU Variant
Barts XT (215-0798000)
GCN 1.0
Architecture
TeraScale 2
TSMC
Foundry
TSMC
28 nm
Process Size
40 nm
4.313 billion
Transistors
1.7 billion
352 mm²
Die Size
255 mm²

Graphics Features

12 (11_1)
DirectX
11.2 (11_0)
4.6
OpenGL
4.4
1.2
OpenCL
1.2
1.2
Vulkan
N/A
-
-
-
5.1
Shader Model
5.0

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