NVIDIA B300 vs NVIDIA GeForce 6800 Ultra

Comparison of NVIDIA B300 with 144 GB HBM3e and 18,944 cores vs NVIDIA GeForce 6800 Ultra with 256 GB GDDR3.

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Performance Rating

A100 A100
H200 H200
MI325X MI325X

NVIDIA B300

71.9

NVIDIA B300

71.9
RX 7900 XTX RX 7900 XTX
MI250 MI250
Instinct MI300X Instinct MI300X

NVIDIA GeForce 6800 Ultra

NVIDIA GeForce 6800 Ultra

Contents:

Memory ML Performance Compute Power Architecture & Compatibility ML Software Support Clocks & Performance Power Consumption Rendering Additional

Memory

Memory Size

🔥 144 ГБ ×2 (288 ГБ)
256 MB

Memory Type

HBM3e GDDR3

Memory Bandwidth

🔥 4.10 TB/s ×2 (8.2 TB/s)
35.20 GB/s

Memory Bus Width

4,096 бит ×2 (8192 бит) 256 бит

ML Performance

FP16 (Half Precision)

🔥 1.2318 TFLOPS
No

BF16 (Brain Float)

No No

TF32 (TensorFloat)

No No

Compute Power

FP32 (Single Precision)

🔥 76.99 TFLOPS
No

FP64 (Double Precision)

🔥 1.2029 TFLOPS
No

CUDA Cores

🔥 18,944 ×2 (37888)
No

RT Cores

No No

Architecture & Compatibility

GPU Architecture

Blackwell Ultra Curie

SM (Streaming Multiprocessor)

🔥 148
No

PCIe Version

PCIe 5.0 x16 PCIe 1.0 x16

ML Software Support

CUDA Version

10.3 No

Clocks & Performance

Base Clock

🔥 1,665
No

Boost Clock

🔥 2,032
No

Memory Clock

🔥 +264% 2,000
550

Power Consumption

Recommended PSU

1800 W
🔥 -86% 250 W

Power Connector

No 1x 6-pin

TDP/TGP

1400 W
🔥 -94% 81 W

Rendering

Texture Units (TMU)

🔥 +3,600% 592 ×2 (1184)
16

ROP

No No

L2 Cache

🔥 50 MB
No

Additional

Slots

🔥 SXM Module
Dual-slot

Release Date

Sept. 11, 2025 July 26, 2004

Display Outputs

No outputs
2x DVI
1x S-Video

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