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What kind of system does CAD LT "really" need to run well? - Page 2

post #11 of 17
If he's going to be using LT you can pretty much get away with anything.

To my knowledge there is no 3d rendering or anything of the sort available on LT. It's standard 2D drawing, which isn't that taxing at all on modern hardware. I'm running LT 2009 on my laptop that has a 2.2ghz Core2duo just fine. No need to go overboard on the build if you're trying to save on cost.
post #12 of 17
http://usa.autodesk.com/autocad-lt/system-requirements/
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post #13 of 17
Quote:
Originally Posted by Foolsmasher View Post

If he's going to be using LT you can pretty much get away with anything.
To my knowledge there is no 3d rendering or anything of the sort available on LT. It's standard 2D drawing, which isn't that taxing at all on modern hardware. I'm running LT 2009 on my laptop that has a 2.2ghz Core2duo just fine. No need to go overboard on the build if you're trying to save on cost.

^and this
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post #14 of 17
Thread Starter 
Yea, In the OP I mentioned that the system requirements were laughable but I wasn't sure if you thew some good hardware at it, if it would utilize it.

So basically building with an i7 is way overkill and the ssd will help but not that much?
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post #15 of 17
^EDIT: Oh it's 2D CAD? $50 Quadro card based on Nvidia 7000 series, and a dual-core is overkill. As are SSD's. Disregard the rest lol..
Quote:
Originally Posted by Jayjr1105 View Post

So get a good strong CPU, 8 GB ram, a low'ish end card and you'll be perfectly fine unless you are doing a lot of rendering? Can someone explain rendering within AutoCAD software and how to know if the client will be doing a lot of it? Thanks all, I'll be tossing out some rep sooner or later.

i5-2500 should be fine. i7-2600 will be a little faster for render speeds, due to hyperthreading. On the SSD recommendation, Intel 510/520, or Samsung 830, or Crucial M4 are the only ones I'd consider. Intel 320 SSD's have horrible reliability, and they're not even fast. For graphics, make sure the Quadro card has at least 96 CUDA cores. Those are a good bang/buck. Anyways, consumer Nvidia cards absolutely suck for CAD work. I've seen AMD laptop graphics cards bench about 70% better than a GTX 580 desktop, this is absurd. Proof. http://www.techspot.com/review/452-amd-bulldozer-fx-cpus/page7.html .... http://www.notebookcheck.net/AMD-Radeon-HD-6850M.43079.0.html

CPU is more important when you're editing the part (uses 2 threads) and rendering (uses all threads). Graphics are still important for actually letting you rotate the component at a decent speed, zooming in/out, and so on.

I would ask the client what their typical CAD file sizes are (for parts, and for assemblies). If they say something like > 20MB for parts or assembly.. ok, get something fast. Any time you save the part, you have to render it, meaning every 20 minutes with autosave. You also have to render the part occasionally when modifying an assembly (basically "rebuild"). For me, it's maybe 8-10 seconds with an i3 dual-core and a ~20MB assembly. 3-5 seconds would be more ideal, I'm sure a 2500 would bring it down in the 4ish range. But Autosave also means you're doing a lot of disk I/O, so the SSD is a good idea. And CAD programs have a lot of temp files that are accessed from the disk if/when needed, so SSD is good. Basically, what you have looks fine.
Quote:
Originally Posted by ClaytonGFinley View Post

***, my cad worstation is a p4... and the boss man won't let me do a build to bring and leave at work to work out ( out of my own pocket )
But my home rig is beast ( see sig rig )
IMO, an SSD is not solely worth it for just cad, it still boots rather slow, and once your in the program, it saves fast and opens fast, since ( for me ) most of the cad files i work in are from 1-5mb
Also, unless rendering, any generic video card will do. the $30 card in my workstation preforms cad actions just as fast as my overclocked and watercooled gtx 580 ( for the work i do anyway )
EDIT: and yes, cad is more CPU intensive than GPU
( basically, when video gaming, your screen ( idealy ) changes 60 times a second, and on autocad, it does not change until you tell it to )
( also note how my work machine us under the official autocad system requirements, and i'm running full blow AutoCad Architecture )
And as far as ram, i've noted that on higher end systems, if you have 4gigs, it will use up to 2, if you have 6, up to 4, and at home on my 8gigs, it uses 6 despite the file size, number of drawings open, etc.

For whatever it's worth, I'm in university working on a school-related project and I mainly work with a ~25MB assembly, various smaller (5-10MB) assemblies, and occasionally modifying 3D scans (30-50MB). Soo.. it completely depends on what sort of files you work with. I run Solidworks so that's probably part of the difference. But yes, I'd expect the $30 CAD card to beat a GTX 580 for pretty much any CAD work.
Edited by jrbroad77 - 3/2/12 at 12:43pm
 
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post #16 of 17
@ JR

Yes, solidworks and revit files and such are much larger, but for autocad LT, not much is needed to run it. and the $30 video card i mentioned is not a cad specific card, its a consumer gaming card, but my point was AutoCad 2d work will never ever need more than a basic gpu, stating that the $30 card runs A/C just as well as a $600.
(3d work is a completely different story )

PS. your 'proof' of the laptop card out performing a 580 is illogical in every way possible.
Edited by ClaytonGFinley - 3/2/12 at 1:01pm
post #17 of 17
i'll add my 2 cents. i'm running AutoCAD Civil 3D on the workstation rig in my sig. integrated GPU. works perfectly fine when doing anything 2D. also, my files are about 50mb. its actually tolerable in 3D also. granted, im not trying to make it do anything crazy since i know it'd struggle(one the fly 3D views and stuff like that). I have only rendered in Revit and afaik rendering in Revit is all CPU. doesnt use the GPU at all. the GPU gets used to draw whatever is in the viewport. In the future I'll be using 3DS Max for rendering and I'll def be using a GPU for that.
 
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