NVIDIA B300 vs SPARKLE Calibre GTX 680 Captain

Comparison of NVIDIA B300 with 144 GB HBM3e and 18,944 cores vs SPARKLE Calibre GTX 680 Captain with 2 GB GDDR5 and 1,536 cores.

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Performance Rating

NVIDIA B300 outperforms SPARKLE Calibre GTX 680 Captain by 2,506.16% in the overall GPU ARK 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

SPARKLE Calibre GTX 680 Captain

2.8

SPARKLE Calibre GTX 680 Captain

2.8

Contents:

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

Memory

Memory Size

🔥 +7,100% 144 ГБ ×2 (288 ГБ)
2 GB

Memory Type

HBM3e GDDR5

Memory Bandwidth

🔥 4.10 TB/s ×2 (8.2 TB/s)
198.4 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)

🔥 +2,008% 76.99 TFLOPS
3.653 TFLOPS

FP64 (Double Precision)

🔥 +690% 1.2029 TFLOPS
0.1522 TFLOPS

CUDA Cores

🔥 +1,133% 18,944 ×2 (37888)
1,536

RT Cores

No No

Architecture & Compatibility

GPU Architecture

Blackwell Ultra Kepler

SM (Streaming Multiprocessor)

🔥 148
No

PCIe Version

PCIe 5.0 x16 PCIe 3.0 x16

ML Software Support

CUDA Version

🔥 10.3
3.0

Clocks & Performance

Base Clock

🔥 +48% 1,665
1,124

Boost Clock

🔥 +71% 2,032
1,189

Memory Clock

🔥 +29% 2,000
1,550

Power Consumption

Recommended PSU

1800 W
🔥 -75% 450 W

Power Connector

No 2x 6-pin

TDP/TGP

1400 W
🔥 -86% 195 W

Rendering

Texture Units (TMU)

🔥 +362% 592 ×2 (1184)
128

ROP

No No

L2 Cache

🔥 50 MB
512 KB

Additional

Slots

🔥 SXM Module
Dual-slot

Release Date

Sept. 11, 2025 Sept. 3, 2012

Display Outputs

No outputs
2x DVI
1x HDMI 1.4a
1x DisplayPort 1.2

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