GeForce RTX 4090 vs Radeon RX 6900 XTX
We compared two Desktop platform GPUs: 24GB VRAM GeForce RTX 4090 and 16GB VRAM Radeon RX 6900 XTX to see which GPU has better performance in key specifications, benchmark tests, power consumption, etc.
Main Differences
GeForce RTX 4090 's Advantages
Boost Clock has increased by 3% (2520MHz vs 2435MHz)
More VRAM (24GB vs 16GB)
Larger VRAM bandwidth (1.01TB/s vs 576.0GB/s)
11264 additional rendering cores
Radeon RX 6900 XTX 's Advantages
Lower TDP (330W vs 450W)
Score
Benchmark
FP32 (float)
GeForce RTX 4090
+231%
82580
Radeon RX 6900 XTX
24930
Graphics Card
Sep 2022
Release Date
Unknown
GeForce 40
Generation
Navi II
Desktop
Type
Desktop
PCIe 4.0 x16
Bus Interface
PCIe 4.0 x16
Clock Speeds
2235 MHz
Base Clock
2075 MHz
2520 MHz
Boost Clock
2435 MHz
1313 MHz
Memory Clock
2250 MHz
Memory
24GB
Memory Size
16GB
GDDR6X
Memory Type
GDDR6
384bit
Memory Bus
256bit
1.01TB/s
Bandwidth
576.0GB/s
Render Config
-
Compute Units
80
128
SM Count
-
16384
Shading Units
5120
512
TMUs
320
176
ROPs
128
512
Tensor Cores
-
128
RT Cores
80
128 KB (per SM)
L1 Cache
128 KB per Array
72 MB
L2 Cache
4 MB
-
L3 Cache
128 MB
Theoretical Performance
443.5 GPixel/s
Pixel Rate
311.7 GPixel/s
1290 GTexel/s
Texture Rate
779.2 GTexel/s
82.58 TFLOPS
FP16 (half)
49.87 TFLOPS
82.58 TFLOPS
FP32 (float)
24.93 TFLOPS
1290 GFLOPS
FP64 (double)
1.558 TFLOPS
Board Design
450W
TDP
330W
850 W
Suggested PSU
700 W
1x HDMI 2.1
3x DisplayPort 1.4a
Outputs
1x HDMI 2.1
2x DisplayPort 1.4a
1x USB Type-C
1x 16-pin
Power Connectors
2x 8-pin
Graphics Processor
AD102
GPU Name
Navi 21
AD102-300-A1
GPU Variant
Navi 21 XTXH
(215-121000247)
Ada Lovelace
Architecture
RDNA 2.0
TSMC
Foundry
TSMC
5 nm
Process Size
7 nm
76.3 billion
Transistors
26.8 billion
609 mm²
Die Size
520 mm²
Graphics Features
12 Ultimate (12_2)
DirectX
12 Ultimate (12_2)
4.6
OpenGL
4.6
3.0
OpenCL
2.1
1.3
Vulkan
1.3
8.9
CUDA
-
6.8
Shader Model
6.5