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GPU Comparison
AMD Radeon RX 6900 XT vs AMD Radeon R9 390 X2
AMD Radeon RX 6900 XT vs AMD Radeon R9 390 X2
VS
AMD Radeon RX 6900 XT
AMD Radeon R9 390 X2
We compared two Desktop platform GPUs: 16GB VRAM Radeon RX 6900 XT 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 RX 6900 XT 's Advantages
Released 5 years and 1 months late
Boost Clock2250MHz
More VRAM (16GB vs 8GB)
Larger VRAM bandwidth (512.0GB/s vs 345.6GB/s)
2560 additional rendering cores
Lower TDP (300W vs 580W)
Score
Benchmark
FP32 (float)
Radeon RX 6900 XT
+350%
23.04 TFLOPS
Radeon R9 390 X2
5.12 TFLOPS
Radeon RX 6900 XT
VS
Radeon R9 390 X2
Graphics Card
Oct 2020
Release Date
Sep 2015
Navi II
Generation
Pirate Islands
Desktop
Type
Desktop
PCIe 4.0 x16
Bus Interface
PCIe 3.0 x16
Clock Speeds
1825 MHz
Base Clock
-
2250 MHz
Boost Clock
-
2000 MHz
Memory Clock
1350 MHz
Memory
16GB
Memory Size
8GB
GDDR6
Memory Type
GDDR5
256bit
Memory Bus
512bit
512.0GB/s
Bandwidth
345.6GB/s
Render Config
-
SM Count
-
80
Compute Units
40
5120
Shading Units
2560
320
TMUs
160
128
ROPs
64
-
Tensor Cores
-
80
RT Cores
-
128 KB per Array
L1 Cache
16 KB (per CU)
4 MB
L2 Cache
1024 KB
Theoretical Performance
288.0 GPixel/s
Pixel Rate
64.00 GPixel/s
720.0 GTexel/s
Texture Rate
160.0 GTexel/s
46.08 TFLOPS
FP16 (half)
-
23.04 TFLOPS
FP32 (float)
5.120 TFLOPS
1440 GFLOPS
FP64 (double)
640.0 GFLOPS
Graphics Processor
Navi 21
GPU Name
Grenada
Navi 21 XTX (215-121000167)
GPU Variant
Grenada PRO (215-0880030)
RDNA 2.0
Architecture
GCN 2.0
TSMC
Foundry
TSMC
7 nm
Process Size
28 nm
26.8 billion
Transistors
6.2 billion
520 mm²
Die Size
438 mm²
Board Design
300W
TDP
580W
700 W
Suggested PSU
950 W
1x HDMI 2.1 2x DisplayPort 1.4a 1x USB Type-C
Outputs
2x DVI 1x HDMI 1.4a 1x DisplayPort 1.2
2x 8-pin
Power Connectors
4x 8-pin
Graphics Features
12 Ultimate (12_2)
DirectX
12 (12_0)
4.6
OpenGL
4.6
2.1
OpenCL
2.0
1.3
Vulkan
1.2
-
CUDA
-
6.5
Shader Model
6.3
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