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NVIDIA B100 SXM 192GB vs NVIDIA RTX PRO 4000 Blackwell SFF 24GB

The B100 delivers 2.5x the FP32 throughput of the RTX PRO 4000 Blackwell SFF (60 vs 24 TFLOPS dense). The B100 also carries 168 GB more memory (192 GB vs 24 GB).

B100: Blackwell, 2024 RTX PRO 4000 Blackwell SFF: Blackwell, 2025
FP32 dense lead
2.5x
B100: 60 vs 24 TFLOPS
Memory
192 vs 24 GB
168 GB more for the B100
Bandwidth
8.0 TB/s vs 432 GB/s
B100 moves data faster
TDP
700 W vs 70 W
RTX PRO 4000 Blackwell SFF draws 630 W less
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NVIDIA B100 SXM 192GB vs NVIDIA RTX PRO 4000 Blackwell SFF 24GB

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NVIDIA B100 SXM 192GB

Leads on FP32 Full specs →

What is the NVIDIA B100?

The B100 is a GPU from NVIDIA on the Blackwell architecture, an accelerator for AI training, inference and high-performance computing. It is an SXM module, the mezzanine format used in dense multi-GPU servers. B100 full specifications →

Can I rent the B100 in the cloud?

Flopper is not tracking any live rental listings for the B100 yet. The provider directory lists the clouds that rent comparable accelerators on demand. GPU cloud providers →

How does the B100 compare with other accelerators?

This page sets the B100 against the RTX PRO 4000 Blackwell SFF. The B100 is the older generation of the two. Both are NVIDIA parts; the B100 is an SXM module while the RTX PRO 4000 Blackwell SFF is a PCIe card. Flopper also compares it head to head with the B200 SXM 180GB, across every published precision, memory and power. B100 vs B200 SXM 180GB →

Where do the B100 figures come from?

NVIDIA published the B100 figures in marketing material rather than a datasheet, and Flopper has no independent confirmation of them. How Flopper verifies specifications →

NVIDIA RTX PRO 4000 Blackwell SFF 24GB

Full specs →

What is the NVIDIA RTX PRO 4000 Blackwell SFF?

The RTX PRO 4000 Blackwell SFF is a GPU from NVIDIA on the Blackwell architecture, an accelerator for AI training, inference and high-performance computing. It is a PCIe add-in card, so it fits standard servers and workstations. RTX PRO 4000 Blackwell SFF full specifications →

Can I rent the RTX PRO 4000 Blackwell SFF in the cloud?

Flopper is not tracking any live rental listings for the RTX PRO 4000 Blackwell SFF yet. The provider directory lists the clouds that rent comparable accelerators on demand. GPU cloud providers →

How does the RTX PRO 4000 Blackwell SFF compare with other accelerators?

This page sets the RTX PRO 4000 Blackwell SFF against the B100. The RTX PRO 4000 Blackwell SFF is the newer generation of the two. Both are NVIDIA parts; the RTX PRO 4000 Blackwell SFF is a PCIe card while the B100 is an SXM module. The compare tool builds the same comparison for any two parts in the catalogue. All GPU comparisons →

Where do the RTX PRO 4000 Blackwell SFF figures come from?

Every RTX PRO 4000 Blackwell SFF figure on this page traces to NVIDIA's own datasheet or specification table. How Flopper verifies specifications →

Specifications

B100
RTX PRO 4000 Blackwell SFF
Architecture
BlackwellBlackwell
Launch Year
20242025
Form Factor
SXMPCIe
Memory
192 GB24 GB
Memory Bandwidth
8.0 TB/s432 GB/s
TDP
700 W70 W
Process Node
4nm4nm

Performance (TFLOPS)

B100
RTX PRO 4000 Blackwell SFF
30 TFLOPS No verified data available
60 TFLOPS 24 TFLOPS
875 TFLOPS
sparse not published
 No verified data available
1,750 TFLOPS
sparse not published
 No verified data available
1,750 TFLOPS
sparse not published
 No verified data available
3,500 TFLOPS
sparse not published
 No verified data available
FP6
No verified data available No verified data available
7,000 TFLOPS
sparse not published
385 TFLOPS
770 TFLOPS sparse
3,500 TOPS
sparse not published
 No verified data available

Figures are dense. Where a vendor publishes a figure it sits under the dense one and never decides a winner. Hover any precision for its definition, or read the GPU glossary.

FLOPS by Precision

What actually differs

The RTX PRO 4000 Blackwell SFF is the newer part: Blackwell (2025) against the B100's Blackwell (2024).

The B100 carries 168 GB more memory (192 GB against 24 GB), so larger models fit on one GPU before you shard. Bandwidth is 8.0 TB/s against 432 GB/s, which sets the ceiling on decode speed.

Power is 700 W against 70 W, and at FP32 the RTX PRO 4000 Blackwell SFF does more work per watt. Weight the FP8 and FP16 rows for LLM work and the FP64 row for HPC.

New to the terms? The glossary explains FP64, FP32, TF32, BF16, FP16, FP8, FP4, INT8, Sparsity and TFLOPS. For how the generations relate, see NVIDIA architectures explained.

Frequently asked questions

Is the B100 faster than the RTX PRO 4000 Blackwell SFF?

At FP32 precision the B100 reaches 60 TFLOPS dense against 24 TFLOPS for the RTX PRO 4000 Blackwell SFF. The performance table on this page lists every published precision for both GPUs.

Which should you choose, the B100 or the RTX PRO 4000 Blackwell SFF?

Choose the B100 for training and high-throughput inference: it has 2.5x the FP32 throughput of the RTX PRO 4000 Blackwell SFF. It also carries 168 GB more memory, so larger models fit on one GPU before you shard. The B100 draws 630 W more power, so budget for cooling and power delivery before you commit. Packaging differs too: the B100 is an SXM module while the RTX PRO 4000 Blackwell SFF is a PCIe card, so check what your servers accept.

Which has more memory, the B100 or the RTX PRO 4000 Blackwell SFF?

The B100 carries 192 GB of memory versus 24 GB for the RTX PRO 4000 Blackwell SFF. Memory bandwidth is 8.0 TB/s for the B100 and 432 GB/s for the RTX PRO 4000 Blackwell SFF.

How much power do the B100 and the RTX PRO 4000 Blackwell SFF draw?

The B100 is rated at 700 W TDP and the RTX PRO 4000 Blackwell SFF at 70 W. On FP32 throughput per watt, the RTX PRO 4000 Blackwell SFF is the more efficient part.

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