How much ram does it requiers?

[Kekkerer]

There is a practical advantage to having ground clutter on ultra. You may or may not have noticed that when you play with your view distance zoomed out to the max, you sometimes run into invisible objects that may or may not become visible as you're running into them. This is because the distance at which these objects are loaded in does not start at your character which you might expect but at the position of your camera. So in order to enjoy playing at max zoom level you need to maximize the ground clutter render distance so that you can avoid running into objects such as lamp posts or hedges.

[Kekkerer]

I think that I'm coming off a bit mad but recommending 8GB of memory to someone building a new system and using god knows what screen resolution is irresponsible especially if you consider that we're talking about a price difference of ~50 EUR.

[MiRai]

There is a practical advantage to having ground clutter on ultra. You may or may not have noticed that when you play with your view distance zoomed out to the max, you sometimes run into invisible objects that may or may not become visible as you're running into them. This is because the distance at which these objects are loaded in does not start at your character which you might expect but at the position of your camera. So in order to enjoy playing at max zoom level you need to maximize the ground clutter render distance so that you can avoid running into objects such as lamp posts or hedges.

Ground Clutter does not affect the distance at which objects like fences and lamp posts are drawn,
Environmental Detail does. Ground Clutter affects how much grass and foliage you see on the ground and how
dense it is. Just doing a quick in game test at the moment and zoomed all the way (Max Camera Distance slider
on Far too) out I can easily see a fence that could trip me up well over 30 yards away with my
Environmental Detail on the Good setting.

I think that I'm coming off a bit mad but recommending 8GB of memory to someone building a new system and using god knows what screen resolution is irresponsible especially if you consider that we're talking about a price difference of ~50 EUR.

Hey, I'm all for a lot of RAM as well and I'm not here to argue. But the OP asked if he could 5 box with 8GB of
RAM when it is completely viable to only have 8GB of RAM to 5 box with. I don't think it's irresponsible that
everyone is saying that 8GB of RAM is just fine when you're arguing that more than 8GB of RAM is necessary
in order to have View Distance and Ground Clutter set to Ultra on all 5 windows when neither one of those is
necessary at all.