Gigabyte X79-UP4, Ram amount & overclocking help.

[willhub]

Hi,

Just bought this of MM with an i7 4820k, firstly, it's pretty fast enough as it is but I'm interesting in overclocking it.

2 questions,

The ram is only registering as 15GB in Windows, a whole GB is missing, but bios and certain apps read the full amount, it's not biggie I mean 15gb is enough but if I can find that extra gb that'd be great.

The RAM is Corsair XMS3 and there are 8 sticks of 2gb in it.
Images of bios below and memory anomaly

https://drive.google.com/file/d/0BwlL4QZcLAhBOWpZbVA3RUstTUE/view?usp=sharing
https://drive.google.com/file/d/0BwlL4QZcLAhBd0toMEl1QXFZSlE/view?usp=sharing

Second, I need some overclocking help, the CPU was running at 4.4Ghz previously and potentially up to 3.7, however the settings are not on there, so I need to overclock it from scratch if anyone can advise on this?

Cheers,

 

[Rroff]

Regarding RAM though there isn't a huge amount in it in my experience 2133 or 2400MHz with as tight timings as you can get produces the best balance of performance on my 4820K over a variety of tasks - I think this is partly due to the quad channel not exactly being bandwidth starved but can be a bit less good for latency. The only situation I saw benefit from going for faster RAM was with multi GPU setups - in other use running the RAM at speeds over 3000MHz and the much looser timings could actually penalise performance quite a bit.

I got the best results for overclocking using offset voltage IIRC I'd have to check what I'm actually running as its been awhile - hitting 4.6GHz was pretty easy anything beyond that with my CPU took a TON of extra voltage to get stable :| With 8 dimms populated not sure how easy it would be to overclock though - probably need a fair boost to VTT/IMC voltage and I'm not 100% on what is safe there.

 

[willhub]

My ram is 1600 I think, but at the moment it's running at 666, I'm guessing that's due to quad channel so it's actually 2400? I can boost it to 1600 in the bios but I'm guessing that's 800 and it might bugger it if it's in quad, unless it's forced to run dual channel I dunno?

 

[Rroff]

If its 666MHz in the BIOS I think that means it is actually running at 1333MHz but I'd have to double check.

EDIT: The 3D button thing on the right hand most column should show the actual effective RAM MHz.

EDIT2: Your screenshot shows it running at 1333MHz effective.

 

[willhub]

Should it be running dual channel? And/or 1600MHz?

Might sound dumb but I'm out of the lop loads.

And any idea where 1024mb of ram has gone?


EDIT

This is the exact ram

http://www.corsair.com/en-gb/cmx6gx3m3a1600c9

I'm guessing it'll work like a 8gb kit or a anything as long as there is an even amount of sticks?

 

[willhub]

Anyone have any idea? I took a 2gb stick out so then I'd have 14gb RAM and I noticed the available went to 11gb??

So it's calculating it somehow which means it must be more of a feature than a fault?