RTX 4090 or RTX 5090: which to pick for AI and generation

RTX 5090 has 32 GB of GDDR7 against 24 GB of GDDR6X on the RTX 4090. The extra 8 GB matters where a model sits at the memory limit: 32B LLMs at int4, FLUX with headroom, and video models. If 24 GB covers your task, the 4090 is usually cheaper per hour.

Specifications

	RTX 4090 48 GB	RTX 5090 32 GB
Video memory	48 GB	32 GB
Memory type	GDDR6X	GDDR7
Architecture	Ada Lovelace	Blackwell
Price from	62₽/h	64₽/h
Servers now	66	488

Prices and availability come from the live catalog and update automatically.

Which one to pick

Pick RTX 4090 if

SDXL, FLUX fp8 and LoRA
LLMs 7–14B and 32B at int4
a budget pick for 24 GB

Pick RTX 5090 if

FLUX bf16 and 32 GB with headroom
video models and long context
the newer Blackwell architecture

Cost example

RTX 4090, per hour: about 62 ₽
RTX 5090, per hour: about 64 ₽

Estimate at the current per-GPU hourly price. Billed per minute, the price is fixed at launch.

Questions and answers

Is it worth paying more for a 5090 for the extra 8 GB?: Yes, if your model does not fit in 24 GB or you need headroom for video and long context. Otherwise the 4090 is the better value.
Does the 4090 support FP8?: Yes, Ada supports FP8, but memory stays at 24 GB.

RTX 4090 or RTX 5090: which to pick for AI and generation

Specifications

Which one to pick

Pick RTX 4090 if

Pick RTX 5090 if

Cost example

Questions and answers

Compare with others

RTX 4090 or RTX 5090: which to pick for AI and generation

Specifications

Which one to pick

Pick RTX 4090 if

Pick RTX 5090 if

Cost example

Questions and answers

Compare with others