Note that Vegas Pro 15 (minimum) specifications said : 4 GB RAM (8 GB recommended; 16 GB recommended for 4K)

@ram17 sir i have 8Gb already of 2400 mhz.. so should i go for another 2400 mhz or i can go for 3000mhz also ???

I Got 32 GB memory. Never seen Vegas Pro Use more the 16GB. Is there a setting I should consider?

I stand to be corrected, I didn't read it carefully it's V15, thought it is V16, though plenty of fast ram would still be nice for pc performance beyond the recommended & the minimum specs.

@ram17 sir i have 8Gb already of 2400 mhz.. so should i go for another 2400 mhz or i can go for 3000mhz also ???

If you have the budget, go for 3000mhz & sell your 2400mhz ram, if you don't have yet, buy a single stick for now & buy that same specs later on. And just a reminder that it would be a waste of money if you pair a 3200/3000 mhz to a lower mhz ram cause it'll automatically run at the lowest frequency of the other stick.

I Got 32 GB memory. Never seen Vegas Pro Use more the 16GB. Is there a setting I should consider?

"For optimal performance, we recommend the following minimum system requirements" .

It is recommended in 4K editing (32gb) even though Vegas Pro doesn't occupy all your ram but that is the optimal tech specs requirement.

You can set it for your dynamic ram preview, but I don't know other settings than that to certainly use your ram at max. But I think it is better be abundant than to have a shortage.

I am looking at upgrading my memory as I also have 8GB and since I put in a new video card, Vegas seems to be lagging. My memory is specified as DDR3 1600 (PC3 12800)

My Motherboard spec says:

4 x DIMM, Max. 32GB, DDR3 2200(O.C.)/2133(O.C.)/1866(O.C.)/1600/1333/1066 MHz Non-ECC, Un-buffered Memory
Dual Channel Memory Architecture
Supports Intel® Extreme Memory Profile (XMP)
* Hyper DIMM support is subject to the physical characteristics of individual CPUs. 
* Refer to www.asus.com or user manual for the Memory QVL (Qualified Vendors Lists).
* Due to CPU behavior, DDR3 2200/2000/1800 MHz memory module will run at DDR3 2133/1866/1600 MHz frequency as default.

So what would be the best memory to get for my board? It sounds like my current memory is outdated based on this discussion.

You can check it yourself by loading a heavy project and do want you normally do with opened taskmanager and you can see how it goes.
My use of my 16 GB DDR4 never goes beyond the 50%.

Spend less than $100 and buy something like this:

http://www.newegg.com/crucial-16gb-240-pin-ddr3-sdram/p/N82E16820156047?Item=9SIAHZU8CD7617&Description=Ddr%203%201600&SortField=0&SummaryType=0&PageSize=10&SelectedRating=-1&VideoOnlyMark=False&IsFeedbackTab=true#scrollFullInfo

Don’t throw any more money than that at your boat anchor, errr system.

Be sure to verify physical and electrical characteristic before your order.

You can check it yourself by loading a heavy project and do want you normally do with opened taskmanager and you can see how it goes.
My use of my 16 GB DDR4 never goes beyond the 50%.

Mine too.

I have 64GB of 3000mhz DDR4, it never is fully utilized by Vegas. The only time I've ever used even a nice chunk of it is when doing massive dynamic RAM previews, and those are hit or miss on if they'll render at all, or if they'll play back smoothly once they do (for some reason, some effects do not render into dynamic RAM preview, such as the new slomo effect).

I have the suspicion VP doesn't really use more than 50% of whatever unless there's a leak; unless this is a windows thing?

I have the suspicion VP doesn't really use more than 50% of whatever unless there's a leak; unless this is a windows thing?

I haven't done a lot of video work, so I'm unsure how much RAM is involved with editing video. Typically, where the amount of RAM is important is when you get into more multi-track audio mixing and processing while using audio FX plugins. Throw a few good quality Reverbs on an Audio track in Vegas and start watching your RAM usage go up. Audio seems to not get very much attention on this forum, so probably not a big deal for most here and is the reason it gets unnoticed. I wouldn't run anything less than 16GB of RAM, my system which is a laptop is currently maxed out at 32GB.