by promity » Wed Sep 15, 2021 3:05 am
promity
Wed Sep 15, 2021 3:05 am
As of this writing, in most cases Octane does not pool (or combine) VRAM from multiple cards. It uses the VRAM in the card with the LEAST amount, and then any additional textures or geometry is loaded into system RAM (this is called Out-of-Core memory, or OoC). For example, if you were to put a 24GB card and a 4GB card in, you’d only be able to utilize 4GB of VRAM before it overflows into system RAM (unless you disabled the 4GB card in the Octane settings). Also, scenes loaded into OoC memory currently can’t use RTX acceleration.
The latter position is especially disappointing, since it shows that the much-advertised RTX function is very seriously limited if you have difficult scenes, but there is no NVLink or there is no video card with 24-48 gigabytes of memory.
By and large, over the past few years, the entire development of Octane was at the expense of Nvidia. But now Nvidia will not help much if the Octane developers continue to sit idly by.
AMD Threadripper 1950X/64gb ram/RTX 3080 Ti + RTX 2070/Samsung SSD 870 EVO 500 gb/
Lightwave 3d