32GB DDR3 RAM Quad Channel

The kit linked is not ECC (UDIMM/RDIMM), so it's not "server" memory, it's desktop memory.

What CPU and MOBO?

it depends on the server you are putting it in. For a PC as a server it would be great, but if you need Fully Buffered or ECC ram (which is required by many servers) then it simply will not work for you.

Also, it depends on your use. If it is for a home server it will be enough (lol, more than enough most likely), but if this is something a little more demanding then you may need more. I know my network guy at work says he requires a minimum of 2GB per core/thread on the CPU, and preferably 4GB to keep everything moving nicely. That means you should preferably have 8GB on a duel core, 16GB on a quad core, 32GB on a quad core with hyper-threading, 48GB on a Hex core with hyper-threading, and lastly 64GB on a 8 core or duel quad cores with hyper-threading.

I didn't say server. I meant a custom built desktop to be run as a private server.

Okay?!

Unless the 'whatever' is running Applications e.g. SQL, Web, Virtualization, etc then why do you feel you need 32GB? Running those listed Applications 'should' be run on a server and not some run of the mill PC. If you're file serving then it's all about the RAID Controller, drives, load/bandwidth, and not the CPU, RAM, etc.

Yes you did, you said server related purposes. You left it up to us to determine whether you were talking about a headless desktop running server software, a workstation or an actual rackmount. The latter two would have an actual server mainboard and socket, and probably feature ECC which makes those DIMMs mutually incompatible with standard desktops.

Here's the situation:
I want to run a private server for some sort of game such as a WoW or Maplestory one
Basically I heard that the more RAM the computer running the server has, the less lag
that is present.

A 'Gaming Server' is more less a 'File Server' and as I mentioned:

"If you're file serving then it's all about the RAID Controller, drives, load/bandwidth, and not the CPU, RAM, etc."

It really doesn't matter how much RAM you add if you aren't going to use it. In fact, it will make your system less stable, since you will be running 4 sticks of RAM, hence doubling the probability of memory-related hardware failures, as opposed to using two sticks. If you want a solid system, and can't afford server-class hardware, look for a motherboard with a decent power design, a good PSU, a decent RAID controler with reliable HDDs and add as little hardware and software as you need.

Thanks. Just what I wanted to know.

IMO - If there's going to be a decent 'following' then lease a dedicated server - http://www.softlayer.com/ less then buy space on a shared server.

Your rep will go down the toilet if you have bandwidth, latency, or worst of all stability issues...