NVIDIA H800 PCIe 80GB vs NVIDIA H100 NVL 94GB
The H100 delivers 18% more FP32 throughput than the H800 (60 vs 51 TFLOPS dense). The H100 also carries 14 GB more memory (94 GB vs 80 GB).
NVIDIA H800 PCIe 80GB
Full specs →NVIDIA H100 NVL 94GB
Full specs →Specifications
Performance (TFLOPS)
FLOPS by Precision
What actually differs
The H100 is the newer part: Hopper, launched in 2023, against the H800's Hopper from 2022. Newer architectures typically add lower-precision formats and better throughput per watt, so check the precision rows your workload actually uses.
Dense throughput for the H800 against the H100: FP64 0.8 vs 30 TFLOPS, FP32 51 vs 60 TFLOPS. Sparse figures, where the vendor publishes them, appear under each dense number in the performance table.
Memory is 80 GB against 94 GB, fed at 2.0 TB/s versus 3.9 TB/s. More memory per GPU means larger models fit before you have to shard across cards, which often matters more than raw TFLOPS for inference.
Power budgets are 350 W for the H800 and 400 W for the H100. At FP32 that works out to 0.15 against 0.15 TFLOPS per watt.
For LLM training and inference, weight the FP8 and FP16 rows and memory capacity most heavily. For scientific and HPC workloads, the FP64 row is the one to read.
Frequently asked questions
Is the H800 faster than the H100?
At FP32 precision the H100 reaches 60 TFLOPS dense against 51 TFLOPS for the H800. The performance table on this page lists every published precision for both GPUs.
Which has more memory, the H800 or the H100?
The H100 carries 94 GB of VRAM versus 80 GB for the H800. Memory bandwidth is 2.0 TB/s for the H800 and 3.9 TB/s for the H100.
How much power do the H800 and the H100 draw?
The H800 is rated at 350 W TDP and the H100 at 400 W. On FP32 throughput per watt, the H100 is the more efficient part.
Can I rent the H800 or the H100 in the cloud?
Yes. Live cloud listings tracked by Flopper start at $2.59 per GPU hour. The rental pricing section on this page lists current providers and rates for both GPUs.
Where to Rent
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