H100 SXM5 vs RX 6600 XT
Head-to-head specifications
| Metric | H100 SXM5 | RX 6600 XT | Difference |
|---|---|---|---|
| FP32 compute (TFLOPS) | 4.2 | 10.6 | -60.4% |
| VRAM | 80 GB HBM3 | 8 GB GDDR6 | — |
| Memory bandwidth (GB/s) | 3,350 | 224 | +1,395.5% |
| TDP (W) | 700 | 160 | — |
| Stable Diffusion (it/s) | 85.0 | 1.6 | +5,212.5% |
| LLM inference (tokens/s) | 320 | 11 | +2,809.1% |
| Launch MSRP (USD) | $30,000 | $379 | +7,815.6% |
- RX 6600 XT offers 10.6 TFLOPS of FP32 compute versus 4.2. These cards span different eras or segments, so modern gaming benchmarks are not directly comparable — judge them within their own generation and use case.
Verdict: H100 SXM5 or RX 6600 XT?
H100 SXM5 advantages
- Video memory (+90%)
- Memory bandwidth (+93%)
- AI image generation (+98%)
- Local LLM inference (+97%)
RX 6600 XT advantages
- Power efficiency (+77%)
- Affordability (+99%)
Which should you choose?
- Choose the H100 SXM5 if you play the latest titles at high textures or do GPU-accelerated work.
- Choose the RX 6600 XT if you want lower power draw, heat and noise.
- Choose the H100 SXM5 if you work with high-resolution textures or memory-bound workloads.
H100 SXM5 vs RX 6600 XT: which should you choose?
H100 SXM5 — NVIDIA server graphics card (2022, Hopper) with 80 GB of HBM3; launched at $30,000.
RX 6600 XT — AMD desktop graphics card (2021, RDNA 2) with 8 GB of GDDR6, averaging 29 fps at 1440p; launched at $379.
H100 SXM5 vs RX 6600 XT: RX 6600 XT has more raw compute. RX 6600 XT offers 10.6 TFLOPS of FP32 compute versus 4.2. These cards span different eras or segments, so modern gaming benchmarks are not directly comparable — judge them within their own generation and use case.
Different eras, different missions
These two parts do not compete head-to-head: H100 SXM5 (2022, Server) and RX 6600 XT (2021, Desktop) come from different generations or market segments, so modern game benchmarks do not apply to both. The specification table above is best read as architectural context — process node, memory technology and power budgets show how far GPU design has moved.
Specifications at a glance
H100 SXM5 carries 80 GB of HBM3 against 8 GB of GDDR6 on RX 6600 XT, with board powers of 700 W and 160 W respectively.
The verdict
Both are credible choices in the graphics card comparison space; the specification table above lays out every metric so you can weigh the trade-offs that matter to you. Pick the one whose strengths line up with how you will actually use it.
Frequently asked questions
Is the H100 SXM5 better than the RX 6600 XT?
H100 SXM5 takes the overall edge, though RX 6600 XT wins in specific areas worth weighing. RX 6600 XT offers 10.6 TFLOPS of FP32 compute versus 4.2. These cards span different eras or segments, so modern gaming benchmarks are not directly comparable — judge them within their own generation and use case.
What is the main difference between the H100 SXM5 and the RX 6600 XT?
RX 6600 XT offers 10.6 TFLOPS of FP32 compute versus 4.2. These cards span different eras or segments, so modern gaming benchmarks are not directly comparable — judge them within their own generation and use case.
Which should I choose?
Choose the H100 SXM5 if you play the latest titles at high textures or do GPU-accelerated work. Choose the RX 6600 XT if you want lower power draw, heat and noise.
Methodology
Graphics cards are compared on 3DMark Time Spy scores, average gaming frame rates at 1080p/1440p/4K, FP32 compute throughput, VRAM capacity and type, memory bandwidth, board power (TDP) and launch MSRP — plus AI workload throughput (Stable Diffusion iterations/s and local LLM tokens/s) where measured. Vintage and server GPUs without modern benchmark results are compared on specifications only, clearly labelled. Frame rates are averages across a game suite at high settings; specific titles vary.