Also, any reason you're buying from scorptech?  I think from memory they are the only ones that sell some higher end server great like super micro and the service had always been good but I've found then more expensive.

Josh

 

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KVR16LE11 is unbuffered.

 

I thought the model # indicated that as well.  However, I noted the description in the link:

 

Kingston KVR16LE11/8I 8GB  x2

http://www.scorptec.com.au/product/Memory/ECC_&_Registered/52858-KVR16LE11_8I

 

That's not a description but merely the way that particular vendor has classified their products - ECC, Registered and ECC+Registered modules are grouped together.

 

Then did a search for the model # and found this at Amazon:  http://www.amazon.com/Kingston-Technology-ValueRAM-PC3-12800-KVR16LE11/dp/B00CLBJP2K

... which shows it as a "•240-pin Registered DIMM"

 

It wouldn't be the first time Amazon had a mistake on their website!

 

If you look at the Kingston web site, you will see that all registered modules are explicitly described as such.  If the description doesn't say 'registered', then it isn't.

 

In any event, you need to be CERTAIN that you're buying unbuffered ECC modules.

 

Absolutely correct.

Also, any reason you're buying from scorptech?  I think from memory they are the only ones that sell some higher end server great like super micro and the service had always been good but I've found then more expensive.

Josh

 

They are my preferred provider plus I want them to build it. I can build it myself but they stress test etc. plus do it daily. Price is not as good as some other providers but I use them for the service.

 

In regards to the tips I will let the topic lie as the points made are good ones, I just wanted to offer something that conveyed my gratitude.

 

Noted re: the unbuffered memory.

If anyone can comment on the x16 vs x8 I would appreciate it, thanks again everyone.

If anyone can comment on the x16 vs x8 I would appreciate it, thanks again everyone.

 

Don't worry about the bandwidth.  The issue is that the motherboard has a PCIe x16 slot that runs at x8  (i.e. it's got an x16 physical connector, but is electrically an x8 slot).    That simply means that if you install a PCIe x16 card in it, the card will run at x8 speed.  With a PCIe v2 card installed, that means you'll have 8GB/s of bandwidth (the slot can run at v3 speeds, which means you'd get twice that bandwidth with a v3 card).    Note that 8GB/s of bandwidth is enough for 500MB/s to each of 16 drives ... far more than any rotating platter drive needs.

 

Bottom line:  It'll work just fine 

r.e. the memory -- if you're having them do the build, you can certainly rest easy that they'll use the correct RAM 

 

garycase, I don't want to argue but all the reading I am doing states that a PCI-E X8 is capable of 4GB/s. The slot is PCI-E V3 but the card is V2, I am assuming the card cannot run faster then the standard it supports?

The other thing you have to remember is that if the bandwidth does limit the card that will only be if all drives are at full load. Parity check maybe but everyday stuff probably not.

 

(parity check speed is important though)

 

Josh

... all the reading I am doing states that a PCI-E X8 is capable of 4GB/s. The slot is PCI-E V3 but the card is V2 ...

 

Yes, in one direction the bandwidth for a v2 x8 connection is 4GB/s (the 8GB/s I noted is total bandwidth ... since it's a full duplex transfer).  But the important point is it's plenty fast enough for 16 drives ... that's still 250MB/s/drive => and no modern spinning drive will be limited by that rate.  A modern 1TB/platter drive can get close to 200MB/s on the outermost cylinders, but averages under 150MB/s.

 

Bottom line:  Even parity checks will run at full speed ... even if your ultimately replaced all of the drives with 1.25TB/platter drives running at 7200rpm  [and there are NO drives with those specs available  ]

 

I wondered if this combo might be better:

http://www.scorptec.com.au/product/Controllers/SATA_&_SAS/42789-RR2720SGL

http://www.scorptec.com.au/product/Controllers/SATA_&_SAS/45656-R640L

 

Gives me the drives I need and means I am not hitting any bottlenecks (I know what you said garycase and I believe you but this gives me piece of mind)

I wouldn't say "better" ... but if the 12 drives they provide for is all you need, then it's certainly an acceptable alternative, and a bit less expensive overall.  I'd expect they'll draw a bit more power and generate a bit more heat (since you're using two cards); but not enough to matter.

 

And if it makes you feel better, it's probably worth doing 

 

But as I noted already, you will NOT hit any bottlenecks with the 16-port card unless you stuff your array full of SSDs 

 

By the way, if you're only going to use 12 of the ports on that 16 port card, that means you have even MORE headroom -- i.e. you have 333MB/s bandwidth for each of the 12 drives with a v2 x8 interface !!

 

Definitely NOT something to worry about 

I wondered if this combo might be better:

http://www.scorptec.com.au/product/Controllers/SATA_&_SAS/42789-RR2720SGL

http://www.scorptec.com.au/product/Controllers/SATA_&_SAS/45656-R640L

 

Gives me the drives I need and means I am not hitting any bottlenecks (I know what you said garycase and I believe you but this gives me piece of mind)

I've seen complaints about horrible linux drivers for the Marvel chipset on the 640L(2nd link) posted elsewhere on the forums but my 620A works well on my N54L micro server.

 

I wondered if this combo might be better:

http://www.scorptec.com.au/product/Controllers/SATA_&_SAS/42789-RR2720SGL

http://www.scorptec.com.au/product/Controllers/SATA_&_SAS/45656-R640L

 

Gives me the drives I need and means I am not hitting any bottlenecks (I know what you said garycase and I believe you but this gives me piece of mind)

I've seen complaints about horrible linux drivers for the Marvel chipset on the 640L(2nd link) posted elsewhere on the forums but my 620A works well on my N54L micro server.

 

Thanks for the comment mate, I am going with the 16 port card but only using 12 ports.