Most people think of the RTX 3090 as a deep learning or image generation card. Fair enough — but it also happens to be one of the best values for neural text-to-speech. At 5.6x real-time with 21 GB of VRAM to spare, the 3090 running Coqui XTTS-v2 on GigaGPU is built for serious voice production.
Synthesis Benchmarks
| Metric | Value |
|---|---|
| Real-Time Factor (lower = faster) | 0.18 |
| Synthesis speed | 5.6x real-time |
| Audio hours processed per GPU-hour | 5.6 |
| Precision | FP16 |
| Performance rating | Good |
Benchmark conditions: FP16 inference, single-stream processing, 24kHz output, English, single-speaker. XTTS-v2 streaming server.
VRAM: Room for Everything
| Component | VRAM |
|---|---|
| Model weights (FP16) | 2.4 GB |
| Audio buffer + runtime | ~0.4 GB |
| Total RTX 3090 VRAM | 24 GB |
| Free headroom | ~21.6 GB |
Twenty-one GB of headroom is almost absurd for a TTS model. But it unlocks configurations that no other mid-range card can match: run XTTS-v2 alongside Whisper Large-v3, a 7B LLM, and a Stable Diffusion checkpoint — simultaneously. The 3090 is the single-card multi-model champion at this price point.
Audio Generation Costs
| Cost Metric | Value |
|---|---|
| Server cost | £0.75/hr (£149/mo) |
| Cost per audio hour | £0.135 |
| Audio hours per £1 | 7.4 |
Just over 13p per hour of synthesised voice. At 5.6x speed, the 3090 can generate roughly 134 hours of speech per day — enough for a small audiobook publisher’s entire monthly catalogue. Compare across all GPUs on the benchmark dashboard.
The Voice Production Workhorse
The 3090’s 5.6x synthesis speed bridges the gap between batch and interactive use. Short utterances (under 5 seconds) render almost instantly, making it viable for chatbot voices with minor latency. For longer narration work, the throughput is excellent. If you need faster interactive responses, the RTX 5080 pushes to 8.3x. Full guide: best GPU for text-to-speech.
Quick deploy:
docker run --gpus all -p 8000:8000 ghcr.io/coqui-ai/xtts-streaming-server:latestSee: Coqui hosting guide, all benchmarks, PaddleOCR hosting.
Deploy Coqui XTTS-v2 on RTX 3090
Order this exact configuration. UK datacenter, full root access.
Order RTX 3090 Server
