Some questions about RAM

[Eastman51]

So I'm in the process of building a dual socket workstation (for server use), and the workstation/CPUs that I'm getting don't explicitly state that they do or don't support regular consumer memory or if they are ECC only. 

So far I have the two matching CPUs (Xeon X5660), and I have a workstation + CPU riser lined up (waiting on a couple things before I buy, but am ready to buy if the stock starts to run low on ebay). 

The Workstation I can get with 6 (3x2) GB or 12 (3x4) GB of RAM, but the seller does not indicated what kind of RAM it is (RAM is also going to be for the 1st CPU, idk if what memory that socket has will affect the second CPU). The workstation is a Dell Precision T7500. These workstations use a riser card for the second CPU, and the riser is being purchased separately. Each CPU should also be triple channel, iirc.

 

On ebay, ECC DDR3 seems to be much cheaper than regular DDR3; so I would like to get ECC. The problem is that idk what RAM comes with the workstation, and whether or not my CPUs will work with regular DDR3 or ECC only. I also have not worked with dual socket systems before, so idk if I can mix RAM capacity and type across CPUs.

For example:

Let's say the workstation comes with 12 (3x4) GB of regular DDR3. Can I use this with my CPUs? Can I use ECC on the second CPU if the first has regular DDR3? I'm assuming that I could not add ECC to the first CPU if it has regular at the same time. Also, can the first CPU have 12GB of RAM while the second CPU has 24GB (or more)?

[Firewrath9]

ECC is what Xeons use, get it.

Im pretty sure you can onlu use ECC

[Eastman51]

1 minute ago, Firewrath9 said:

ECC is what Xeons use, get it.

Im pretty sure you can onlu use ECC

Alright, I'll be getting RAM for the second CPU anyways, so if the workstation does ship with regular RAM I should have extra left over.