AMD Radeon RX 6800 vs NVIDIA B300 SXM6 AC
GPU Specs Compare
Graphics Card
Release Date
Oct 2020
Sep 2025
Generation
Navi II
Server Blackwell
Type
Desktop
Desktop
Bus Interface
PCIe 4.0 x16
PCIe 6.0 x16
Clock Speeds
Base Clock
1700 MHz
1665 MHz
Boost Clock
2105 MHz
2032 MHz
Memory Clock
2000 MHz
2000 MHz
Memory
Memory Size
16GB
288GB
Memory Type
GDDR6
HBM3e
Memory Bus
256bit
8192bit
Bandwidth
512.0GB/s
8.19TB/s
Render Config
Compute Units
60
-
Shading Units
3840
18944
TMUs
240
592
ROPs
96
24
RT Cores
60
-
L1 Cache
128 KB per Array
256 KB (per SM)
L2 Cache
4 MB
126 MB
L3 Cache
128 MB
-
SM Count
-
148
Tensor Cores
-
592
Theoretical Performance
Pixel Rate
202.1 GPixel/s
48.77 GPixel/s
Texture Rate
505.2 GTexel/s
1202.9 GTexel/s
FP16 (half)
32.33 TFLOPS
76.99 TFLOPS
FP32 (float)
16.17 TFLOPS
76.99 TFLOPS
FP64 (double)
1010 GFLOPS
1202.9 GFLOPS
Graphics Processor
GPU Name
Navi 21
GB110
GPU Variant
Navi 21 XL(215-121000187)
-
Architecture
RDNA 2.0
Blackwell Ultra
Foundry
TSMC
TSMC
Process Size
7 nm
5 nm
Transistors
26.8 billion
208 billion
Die Size
520 mm²
1628 mm²
Board Design
TDP
250W
1100W
Suggested PSU
600 W
1500 W
Outputs
1x HDMI 2.12x DisplayPort 1.4a1x USB Type-C
No outputs
Power Connectors
2x 8-pin
-
Graphics Features
DirectX
12 Ultimate (12_2)
N/A
OpenGL
4.6
N/A
OpenCL
2.1
3.0
Vulkan
1.3
N/A
Shader Model
6.5
N/A
CUDA
-
10.3
📊 Benchmark
3DMark Time Spy
16,182
-
3DMark Time Spy Extreme
7,771
-
3DMark Speed Way
3,062
-