Radeon R9 280 vs Radeon HD 3870 X2
We compared two Desktop platform GPUs: 3GB VRAM Radeon R9 280 and 512MB VRAM Radeon HD 3870 X2 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
Radeon R9 280 's Advantages
Released 6 years and 2 months late
Boost Clock933MHz
More VRAM (3GB vs 512GB)
Larger VRAM bandwidth (240.0GB/s vs 57.66GB/s)
1472 additional rendering cores
Radeon HD 3870 X2 's Advantages
Lower TDP (165W vs 200W)
Score
Benchmark
FP32 (float)
Radeon R9 280
+533%
3344
Radeon HD 3870 X2
528
Graphics Card
Mar 2014
Release Date
Jan 2008
Volcanic Islands
Generation
Radeon R600
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
901 MHz
Memory
3GB
Memory Size
512MB
GDDR5
Memory Type
GDDR3
384bit
Memory Bus
256bit
240.0GB/s
Bandwidth
57.66GB/s
Render Config
28
Compute Units
4
1792
Shading Units
320
112
TMUs
16
32
ROPs
16
16 KB (per CU)
L1 Cache
-
768 KB
L2 Cache
256 KB
Theoretical Performance
29.86 GPixel/s
Pixel Rate
13.20 GPixel/s
104.5 GTexel/s
Texture Rate
13.20 GTexel/s
3.344 TFLOPS
FP32 (float)
528.0 GFLOPS
836.0 GFLOPS
FP64 (double)
105.6 GFLOPS
Board Design
200W
TDP
165W
550 W
Suggested PSU
450 W
1x DVI
2x HDMI 1.4a
1x DisplayPort 1.2
Outputs
2x DVI
1x S-Video
1x 6-pin + 1x 8-pin
Power Connectors
1x 6-pin + 1x 8-pin
Graphics Processor
Tahiti
GPU Name
R680
Tahiti PRO3
(215-0821330)
GPU Variant
R680 XT
(215-0708017)
GCN 1.0
Architecture
TeraScale
TSMC
Foundry
TSMC
28 nm
Process Size
55 nm
4.313 billion
Transistors
0.666 billion
352 mm²
Die Size
192 mm²
Graphics Features
12 (11_1)
DirectX
10.1 (10_1)
4.6
OpenGL
3.3 (full)
4.0 (partial)
1.2
OpenCL
N/A
1.2
Vulkan
N/A
5.1
Shader Model
4.1
