AMD Radeon RX 6800 XT vs NVIDIA GeForce RTX 4090
GPU · Specs Compare
Graphics Card
Release Date
Oct 2020
Sep 2022
Generation
Navi II
GeForce 40
Type
Desktop
Desktop
Bus Interface
PCIe 4.0 x16
PCIe 4.0 x16
Clock Speeds
Base Clock
1825 MHz
2235 MHz
Boost Clock
2250 MHz
2520 MHz
Memory Clock
2000 MHz
1313 MHz
Memory
Memory Size
16GB
24GB
Memory Type
GDDR6
GDDR6X
Memory Bus
256bit
384bit
Bandwidth
512.0GB/s
1.01TB/s
Render Config
Compute Units
72
—
Shading Units
4608
16384
TMUs
288
512
ROPs
128
176
RT Cores
72
128
L1 Cache
128 KB per Array
128 KB (per SM)
L2 Cache
4 MB
72 MB
L3 Cache
128 MB
—
SM Count
—
128
Tensor Cores
—
512
Theoretical Performance
Pixel Rate
288.0 GPixel/s
443.5 GPixel/s
Texture Rate
648.0 GTexel/s
1290.2 GTexel/s
FP16 (half)
41.47 TFLOPS
82.58 TFLOPS
FP32 (float)
20.74 TFLOPS
82.58 TFLOPS
FP64 (double)
1296 GFLOPS
1290.2 GFLOPS
Graphics Processor
GPU Name
Navi 21
AD102
GPU Variant
Navi 21 XT(215-121000177)
AD102-300-A1
Architecture
RDNA 2.0
Ada Lovelace
Foundry
TSMC
TSMC
Process Size
7 nm
5 nm
Transistors
26.8 billion
76.3 billion
Die Size
520 mm²
609 mm²
Board Design
TDP
300W
450W
Suggested PSU
700 W
850 W
Outputs
1x HDMI 2.12x DisplayPort 1.4a1x USB Type-C
1x HDMI 2.13x DisplayPort 1.4a
Power Connectors
2x 8-pin
1x 16-pin
Graphics Features
DirectX
12 Ultimate (12_2)
12 Ultimate (12_2)
OpenGL
4.6
4.6
OpenCL
2.1
3.0
Vulkan
1.3
1.4
Shader Model
6.5
6.8
CUDA
—
8.9
Benchmark
3DMark Time Spy
19,329
—
▲ Specs Compare
Data sourced from official specifications and benchmark tests.