A VPS is a virtual machine so going into the bios of the virtual machine isn't going to be much to change, you're only way to improve video performance in a virtual machine is to change the virtual video card model and enable 3D video acceleration. With some cards you are then able to increase the video memory or it could be that the hypervisor needs to support it too, can't remember if one was enough or both is needed. But the real question is what are you wanting to do that would need extra video ram?
Never be sorry for asking a question that's what we are here for.
Here's an article that discusses ways to improve video performance.
5 Ways to Improve Video Performance - DZone
Applications and websites that contain videos, webinars, or any other form of streaming or playable media should be optimized for performance.dzone.com
To change the amount of memory allocated to the onboard video card, you must change settings in the system BIOS.
How to Change the Memory Allocated to a Graphics Card
Business owners that need to perform graphics-intensive tasks such as video editing or 3D modeling with their computers often buy high-end PCs with discrete video cards that have built-in, dedicated memory. However, entrepreneurs who use their business PCs for more routine tasks, such as word...smallbusiness.chron.com
IF your not sure how to change setting for your GPU (memory allocation) do some reading on the web.
Also, If your not sure what to do in the BIOS don't make any changes until you fully understand what to do.
See my signature line.
Because of the limitations that you have I'm not so sure that you will be able to render a higher video performance.Thanks for the reply, but maybe I didn't describe it clear enough
My hosting is not streaming video but uses VPS to perform some actions in the browser. But because of lack of video memory it can't work properly due to terrible lags
That's why I hope to improve exactly rendering performance.
And because it's an VPS I can't access physically I can't access BIOS too
So, I would be grateful if you suggest something I can improve even despite these limitations
You could try using ssh forwarding, that way your browser uses the firefox installed on your vps but it would launch locally, the only other option is to do a request to you provider to have them change the video card type and/or increase the video memory of the VPS if that is possible.
Because of the limitations that you have I'm not so sure that you will be able to render a higher video performance.
What exact GPU do you have on that box?