AMD Radeon R9 280X vs AMD Radeon R9 390 X2
We compared two Desktop platform GPUs: 3GB VRAM Radeon R9 280X and 8GB VRAM Radeon R9 390 X2 to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
AMD Radeon R9 280X 's Advantages
Boost Clock1000MHz
Lower TDP (250W vs 580W)
AMD Radeon R9 390 X2 's Advantages
Released 1 years and 11 months late
More VRAM (8GB vs 3GB)
Larger VRAM bandwidth (345.6GB/s vs 288.0GB/s)
512 additional rendering cores
Score
Benchmark
FP32 (float)
Radeon R9 280X
4.096 TFLOPS
Radeon R9 390 X2
+25%
5.12 TFLOPS
Graphics Card
Oct 2013
Release Date
Sep 2015
Volcanic Islands
Generation
Pirate Islands
Desktop
Type
Desktop
PCIe 3.0 x16
Bus Interface
PCIe 3.0 x16
Clock Speeds
850 MHz
Base Clock
-
1000 MHz
Boost Clock
-
1500 MHz
Memory Clock
1350 MHz
Memory
3GB
Memory Size
8GB
GDDR5
Memory Type
GDDR5
384bit
Memory Bus
512bit
288.0GB/s
Bandwidth
345.6GB/s
Render Config
32
Compute Units
40
-
-
-
2048
Shading Units
2560
128
TMUs
160
32
ROPs
64
-
-
-
-
-
-
16 KB (per CU)
L1 Cache
16 KB (per CU)
768 KB
L2 Cache
1024 KB
-
-
-
Theoretical Performance
32.00 GPixel/s
Pixel Rate
64.00 GPixel/s
128.0 GTexel/s
Texture Rate
160.0 GTexel/s
-
-
-
4.096 TFLOPS
FP32 (float)
5.120 TFLOPS
1024 GFLOPS
FP64 (double)
640.0 GFLOPS
Board Design
250W
TDP
580W
600 W
Suggested PSU
950 W
2x DVI
1x 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 XTL
(215-0821065)
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
