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GPU Comparison
AMD Radeon R9 390 X2 vs AMD Radeon RX 6900 XT
AMD Radeon R9 390 X2 vs AMD Radeon RX 6900 XT
VS
AMD Radeon R9 390 X2
AMD Radeon RX 6900 XT
We compared two Desktop platform GPUs: 8GB VRAM Radeon R9 390 X2 and 16GB VRAM Radeon RX 6900 XT 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 R9 390 X2
5.12 TFLOPS
Radeon RX 6900 XT
+350%
23.04 TFLOPS
Radeon R9 390 X2
VS
Radeon RX 6900 XT
Graphics Card
Sep 2015
Release Date
Oct 2020
Pirate Islands
Generation
Navi II
Desktop
Type
Desktop
PCIe 3.0 x16
Bus Interface
PCIe 4.0 x16
Clock Speeds
-
Base Clock
1825 MHz
-
Boost Clock
2250 MHz
1350 MHz
Memory Clock
2000 MHz
Memory
8GB
Memory Size
16GB
GDDR5
Memory Type
GDDR6
512bit
Memory Bus
256bit
345.6GB/s
Bandwidth
512.0GB/s
Render Config
40
Compute Units
80
-
-
-
2560
Shading Units
5120
160
TMUs
320
64
ROPs
128
-
-
-
-
RT Cores
80
16 KB (per CU)
L1 Cache
128 KB per Array
1024 KB
L2 Cache
4 MB
-
L3 Cache
128 MB
Theoretical Performance
64.00 GPixel/s
Pixel Rate
288.0 GPixel/s
160.0 GTexel/s
Texture Rate
720.0 GTexel/s
-
FP16 (half)
46.08 TFLOPS
5.120 TFLOPS
FP32 (float)
23.04 TFLOPS
640.0 GFLOPS
FP64 (double)
1440 GFLOPS
Board Design
580W
TDP
300W
950 W
Suggested PSU
700 W
2x DVI 1x HDMI 1.4a 1x DisplayPort 1.2
Outputs
1x HDMI 2.1 2x DisplayPort 1.4a 1x USB Type-C
4x 8-pin
Power Connectors
2x 8-pin
Graphics Processor
Grenada
GPU Name
Navi 21
Grenada PRO (215-0880030)
GPU Variant
Navi 21 XTX (215-121000167)
GCN 2.0
Architecture
RDNA 2.0
TSMC
Foundry
TSMC
28 nm
Process Size
7 nm
6.2 billion
Transistors
26.8 billion
438 mm²
Die Size
520 mm²
Graphics Features
12 (12_0)
DirectX
12 Ultimate (12_2)
4.6
OpenGL
4.6
2.0
OpenCL
2.1
1.2
Vulkan
1.3
-
-
-
6.3
Shader Model
6.5
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8
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