Fine-tuning VRAM requirements depend on three factors:Precision, training method, and batch size configurationDirect answer:
7B model fine-tuning VRAM quick reference
· LoRA(Fine-tuning adapter layers only): 16–24 GB VRAM; RTX 4090 is the sweet spot
· QLoRA(4-bit quantized base model): 12–16 GB VRAM — runs smoothly on both RTX 3090 and RTX 4090
· Full-parameter fine-tuning: ~80GB (weights + gradients + optimizer states ≈ 8× parameter count); requires A100 80G or multi-GPU ZeRO.
GPU Rental Recommendations
Sufficient for 90% of personal fine-tuning use cases (LoRA/QLoRA, 7B–13B models) — one GPU enough RTX 4090（24GB） This is the optimal solution:
| Platform | Price ⇅ | 24 hours | Inventory | Billing Information | |
|---|---|---|---|---|---|
| Vast.ai (USA)Global lowest priceNorth America
Stability 98·A |
¥0.87/hourCurrently Monitored Low PriceReal-timeSpot | ¥21/day | sufficient | Vast.ai real-time spot price converted (RTX 4090, USD × 7.2); subject to change at any time | Rent Now |
| Salad (USA)Bulk lowest pricesNorth America
Stability 63·C |
¥1.15/hourReal-timeSpot | ¥28/day | sufficient | Salad Distributed Cloud lowest priority tier: $0.160/hr (24GB VRAM; 4 tiers total—higher tiers offer greater stability) | Rent Now |
| PPIO Paiou CloudLow-cost domestic spot pricingChina
Stability 60·C |
¥1.16/hourReal-timeSpot | ¥28/day | sufficient | PPIO Paiou Cloud GPU spot price: ¥1.16/hr (RTX 4090; default 1-hour protection period, 1-hour termination notice) | Rent Now |
| SuanjiayunCurrent Low PriceChina
Stability 98·A |
¥1.24/hourReal-timePay-as-you-go | ¥30/day | sufficient | Suanjiayun official website lists ¥1.24/hour (original ¥2.08; additional discounts available for long-term rentals) | Rent Now |
| MornAILong-Term Rental Offers Better ValueChina
Stability 98·A |
¥1.38/hourReal-timePay-as-you-go | ¥33/day | sufficient | MornAI official website daily rate: ¥33.01/day ÷24 (NVIDIA GeForce RTX 4090 24G); pay-as-you-go hourly rate may be slightly higher. | Rent Now |
| CompshareCash RebateChina
Stability 98·A |
¥1.92/hourReal-timePay-as-you-go | ¥46/day | sufficient | Compshare pay-as-you-go minimum configuration starts at ¥1.92/hour (lower rates for daily/monthly/spot instances available on official website; 5% discount for universities and enterprises) | Rent Now |
| AutoDLMost Comprehensive EcosystemChina
Stability 94·A |
¥1.98/hourReal-timePay-as-you-go | ¥48/day | sufficient | AutoDL pay-as-you-go lowest price ¥1.98/hour (official marketplace RTX 4090, 43 idle GPUs) | Rent Now |
| LanyunChina
Manually maintained |
¥2.00/hourReference price · Verification pendingPay-as-you-go | ¥48/day | sufficient | Real-world stability is solid; response time is fast | Rent Now |
| GpushareStable and EstablishedChina
Stability 98·A |
¥2.18/hourReal-timePay-as-you-go | ¥52/day | sufficient | Gpushare pay-as-you-go real-time price: ¥2.18/hour (original price: ¥4.00) | Rent Now |
| MatPoolListed-price competitivenessChina
Stability 98·A |
¥2.20/hourReal-timePay-as-you-go | ¥53/day | sufficient | MatPool pay-as-you-go pricing: ¥2.20/hour (Zone 11, clearly marked on official site) | Rent Now |
| RunPod (USA)Top overseas favoriteNorth America
Stability 63·C |
¥2.45/hourReal-timeSpot | ¥59/day | sufficient | RunPod Community Cloud lowest price: $0.34/hr (NVIDIA GeForce RTX 4090; Secure Cloud: $0.89/hr) | Rent Now |
| AIStationChina
Manually maintained |
¥2.50/hourReference price · Verification pendingPay-as-you-go | ¥60/day | sufficient | Balanced resource structure; possible queuing during peak hours | Rent Now |
| TensorDock (USA)Global Low PricesNorth America
Manually maintained |
¥2.52/hourReference price · Verification pendingPay-as-you-go | ¥60/day | sufficient | Official starting price: $0.35×7.2 (verified as of Oct 2026); budget-tier machines start at $0.25/hour but frequently run out of stock; third-party data centers | Rent Now |
Full-Parameter Fine-Tuning Required Before Moving to A100 80G:
| Platform | Price ⇅ | 24 hours | Inventory | Billing Information | |
|---|---|---|---|---|---|
| Paperspace (United States)Fastest to get startedNorth America
Data accumulation in progress: 8/30 days |
¥5.47/hourCurrently Monitored Low PriceReal-timePay-as-you-go | ¥131/day | sufficient | Paperspace (United States, a DigitalOcean company) on-demand: $0.76/hour (A100 80GB, hourly billing) | Rent Now |
| Verda (Finland)European value-for-moneyEurope
Stability 63·C |
¥7.78/hourReal-timeSpot | ¥187/day | sufficient | Verda (Finland, formerly DataCrunch) spot: $1.080/hour (1× A100 SXM4 80GB); on-demand: $2.160/hour | Rent Now |
| Thunder Compute (USA)Per-minute billingNorth America
Stability 60·C |
¥7.85/hourReal-timePay-as-you-go | ¥188/day | sufficient | Thunder Compute (USA) pay-as-you-go at $1.09/hr (A100 80GB, customizable storage) | Rent Now |
| RunPod (USA)Top overseas favoriteNorth America
Stability 63·C |
¥8.57/hourReal-timeSpot | ¥206/day | sufficient | RunPod Community Cloud lowest price: $1.19/hr (NVIDIA A100 80GB PCIe; Secure Cloud: $1.79/hr) | Rent Now |
| SuanjiayunCurrent Low PriceChina
Stability 98·A |
¥9.80/hourReal-timePay-as-you-go | ¥235/day | sufficient | Suanjiayun official site lists ¥9.80/hour (original ¥12.00; additional discounts available for long-term rentals). | Rent Now |
| Gcore (Luxembourg)European edge cloudEurope
Stability 60·C |
¥10.61/hourReal-timePay-as-you-go | ¥255/day | sufficient | Gcore (Luxembourg, global edge cloud): pay-as-you-go rate starting at €1.36/hour (A100) | Rent Now |
| Jarvislabs (India)South Asia PreferredAsia-Pacific
Manually maintained |
¥10.73/hourReference price · Verification pendingPay-as-you-go | ¥258/day | sufficient | $1.49×7.2 per minute, billing pauses when suspended; data center in India. | Rent Now |
| CompshareCash RebateChina
Stability 98·A |
¥10.75/hourReal-timePay-as-you-go | ¥258/day | sufficient | Compshare’s lowest pay-as-you-go configuration: ¥10.75/hour (even lower rates available for daily/monthly/spot plans on official site; 5% discount for universities and enterprises). | Rent Now |
| TensorDock (USA)Global Low PricesNorth America
Manually maintained |
¥10.80/hourReference price · Verification pendingPay-as-you-go | ¥259/day | sufficient | PCIe $1.50×7.2；SXM $1.80 | Rent Now |
| Hyperstack (UK)Frequent Entrant on the Ranking ListEurope
Stability 63·C |
¥11.52/hourReal-timePay-as-you-go | ¥276/day | sufficient | Hyperstack (UK) on-demand: $1.60/hour (NVIDIA A100 SXM, 80GB VRAM) | Rent Now |
| Crusoe (USA)Green energyNorth America
Stability 60·C |
¥14.40/hourReal-timePay-as-you-go | ¥346/day | sufficient | Crusoe (USA, powered by clean energy): pay-as-you-go rate starting at $2.00/GPU·hr (NVIDIA A100 80GB) | Rent Now |
| Lambda (USA)Established Prebuilt SystemsNorth America
Data accumulation in progress: 8/30 days |
¥20.09/hourReal-timePay-as-you-go | ¥482/day | sufficient | Lambda (United States) official on-demand price: $2.79 per GPU-hour (NVIDIA A100 SXM 80GB, billed per minute, no outbound bandwidth fee) | Rent Now |
Fallback option when two GPUs lack sufficient VRAM
① Enable gradient checkpointing: saves 30–40% VRAM at the cost of ~20% slower training; ② Switch to 4-bit quantized base models (QLoRA-style): fit 13B models into 24GB VRAM. When hitting OOM, adjust these two first—it’s cheaper than upgrading hardware.