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Graphics card ram?
show user profile  tommtomm
Hi there all,
Quick question, I will be buying a new graphics card and with budget in mind i will be going for the nvidia geforce gtx 580, but i have come to realize that there is a 1.5gb and a 3gb version, there is a slight price difference, I wanted to know if the 1.5gb will help in more complex modeling or is it just for gamers, as the reviews i have been reading doesn't mention its benifits for modelers.

Thanks for your help.
read 396 times
6/10/2011 3:38:12 PM (last edit: 6/10/2011 3:38:12 PM)
show user profile  Dr. Jim
Textures.
Lots of textures in a scene need more RAM.



read 387 times
6/10/2011 3:47:53 PM (last edit: 6/10/2011 3:47:53 PM)
show user profile  advance-software
... for viewport & GPU rendering. CPU renderer doesn't place textures into video memory.
read 385 times
6/10/2011 3:51:18 PM (last edit: 6/10/2011 3:51:18 PM)
show user profile  tommtomm
Thanks guys for that,
but ram on the GPU doesn't matter when in comes to the number of polygons?
read 381 times
6/10/2011 3:52:59 PM (last edit: 6/10/2011 3:52:59 PM)
show user profile  advance-software
it has a small effect, but it's nothing compared to the memory used by textures.
read 379 times
6/10/2011 3:53:37 PM (last edit: 6/10/2011 3:53:37 PM)
show user profile  Dr. Jim
grrr......Thats what I meant to imply.
Textures in viewport use card ram.

good catch AS. Deal for you: 3 cleaned birds for price of 2!
read 377 times
6/10/2011 3:54:00 PM (last edit: 6/10/2011 3:54:00 PM)
show user profile  tommtomm
You guys are very kind with your time.
Thank you.
read 371 times
6/10/2011 3:56:43 PM (last edit: 6/10/2011 3:56:43 PM)
show user profile  Dr. Jim
NP - You wanna buy a cleaned bird?
read 369 times
6/10/2011 4:00:35 PM (last edit: 6/10/2011 4:00:35 PM)
show user profile  advance-software
wow - that is a good deal, bit strapped for cash at the mo though.

read 367 times
6/10/2011 4:02:19 PM (last edit: 6/10/2011 4:04:23 PM)
show user profile  zeefusion
If everything gets loaded onto the graphics card and the card has 3GB of RAM but the 3ds max scene is over 4 GB what happens?
read 354 times
6/10/2011 4:34:00 PM (last edit: 6/10/2011 4:34:00 PM)
show user profile  advance-software
that would create a rift in the space-time continuum resulting in a trans-dimensional phase shift.

read 350 times
6/10/2011 4:43:11 PM (last edit: 6/10/2011 4:45:34 PM)
show user profile  zeefusion
omg why cant anyone give a straight answer for this? Its a simple question. I cant find an answer anywhere and that didnt help!

My max scene shows up as 4gb in the task manager for system ram. if my graphics card is only 3gb i assume it wont fit on therefore it wont render? Or will it render 3gb of it and the renaming 1 gb will be put on the system memory.

From what Vray have said the whole scene has to fit on the card for it to render. including textures.

But is 4gb system RAM the same as 4gb video RAM? Before i go out and buy a £600 card i want to know if it will be waste of time if my scenes are over 4gb of system RAM.
read 345 times
6/10/2011 4:48:21 PM (last edit: 6/10/2011 4:48:21 PM)
show user profile  advance-software
the memory used by max for the scene & the memory required for the GPU are not necessarily the same - the GPU likely requires less as all it needs is textures + geometry whereas max will be carrying around a bunch of other stuff for modifiers, etc.

also the memory required for the max (CPU) scene includes the memory required for max itself which does not have to be dupicated in video memory.

The entire GPU renderable scene does all have to fit into video memory as GPUs don't currently support virtual memory.

If it doesn't, something will say 'out of memory' or crash.
read 343 times
6/10/2011 4:50:40 PM (last edit: 6/10/2011 4:53:49 PM)
show user profile  zeefusion
Thank you. Is there any tool that can work out the memory allocation? So I can see what's eating up the memory.


read 339 times
6/10/2011 4:53:07 PM (last edit: 6/10/2011 4:53:07 PM)
show user profile  advance-software
There's this : http://developer.nvidia.com/nvidia-perfhud

... but its for developers only.

edit: There's a tool that ships with the DirectX SDK called "DirextX Caps Viewer"

Location: dxsdk\Utilities\bin\[x86|x64]\DXCapsViewer.exe

Under DirectDraw Devices\Memory you can see how much video memory you have & how much is being used.

Maybe there's a better tool, but this'll give you the basics.


read 335 times
6/10/2011 4:55:17 PM (last edit: 6/10/2011 5:05:47 PM)
 
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