Radeon R9 280 vs Radeon R9 390 X2
We compared two Desktop platform GPUs: 3GB VRAM Radeon R9 280 and 8GB VRAM Radeon R9 390 X2 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
Radeon R9 280 's Advantages
Boost Clock933MHz
Lower TDP (200W vs 580W)
Radeon R9 390 X2 's Advantages
Released 1 years and 6 months late
More VRAM (8GB vs 3GB)
Larger VRAM bandwidth (345.6GB/s vs 240.0GB/s)
768 additional rendering cores
Score
Benchmark
FP32 (float)
Radeon R9 280
3344
Radeon R9 390 X2
+53%
5120
Graphics Card
Mar 2014
Release Date
Sep 2015
Volcanic Islands
Generation
Pirate Islands
Desktop
Type
Desktop
PCIe 3.0 x16
Bus Interface
PCIe 3.0 x16
Clock Speeds
827 MHz
Base Clock
-
933 MHz
Boost Clock
-
1250 MHz
Memory Clock
1350 MHz
Memory
3GB
Memory Size
8GB
GDDR5
Memory Type
GDDR5
384bit
Memory Bus
512bit
240.0GB/s
Bandwidth
345.6GB/s
Render Config
28
Compute Units
40
1792
Shading Units
2560
112
TMUs
160
32
ROPs
64
16 KB (per CU)
L1 Cache
16 KB (per CU)
768 KB
L2 Cache
1024 KB
Theoretical Performance
29.86 GPixel/s
Pixel Rate
64.00 GPixel/s
104.5 GTexel/s
Texture Rate
160.0 GTexel/s
3.344 TFLOPS
FP32 (float)
5.120 TFLOPS
836.0 GFLOPS
FP64 (double)
640.0 GFLOPS
Board Design
200W
TDP
580W
550 W
Suggested PSU
950 W
1x DVI
2x HDMI 1.4a
1x DisplayPort 1.2
Outputs
2x DVI
1x HDMI 1.4a
1x DisplayPort 1.2
1x 6-pin + 1x 8-pin
Power Connectors
4x 8-pin
Graphics Processor
Tahiti
GPU Name
Grenada
Tahiti PRO3
(215-0821330)
GPU Variant
Grenada PRO
(215-0880030)
GCN 1.0
Architecture
GCN 2.0
TSMC
Foundry
TSMC
28 nm
Process Size
28 nm
4.313 billion
Transistors
6.2 billion
352 mm²
Die Size
438 mm²
Graphics Features
12 (11_1)
DirectX
12 (12_0)
4.6
OpenGL
4.6
1.2
OpenCL
2.0
1.2
Vulkan
1.2
5.1
Shader Model
6.3
