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Does cas latecy really make a difference?

Last response: in Systems
March 2, 2010 2:07:51 PM

Well I'm building a new i7 920 stystem and I would like to know wether cas 9 would be good enough and wether it would slow down my system. Or is it better to go for cas lotency 7 or 6?
March 2, 2010 2:11:55 PM

As always, wikipedia shouldn't be used as a reference source, but the basic information is accurate.

Your system will perform a little faster with CAS 6 or CAS 7. Whether or not that's noticeable in day-to-day usage is another matter. However, CAS 7 isn't that much more expensive than CAS 9 most of the time, so you might as well at least get 7, especially if you're already dropping a bunch on an i7-920 (why not a 930?).

You might not notice lower CAS during short periods of gaming, but if you're doing significant number-crunching or editing, or you want that extra edge vs. your opponents in an FPS game, I would expect it to be noticeable in the long run.
March 2, 2010 2:21:24 PM

also another question if above 1.5 vlts fries my cpu why is most ram 1.65?
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March 2, 2010 2:32:10 PM

Where did you hear that 1.5 volts would fry your processor? As far as I know, the limit is 1.65 volts for i5/i7.
March 2, 2010 3:05:38 PM

well that's what I heard aswell but according to intel 1.5 is recommended and above 1.55 damages your cpu
March 2, 2010 3:21:02 PM

Can you provide a link to where you read that? I haven't heard that from any source.
March 2, 2010 3:51:18 PM

1.65 V is the limit for most CPUs. So, do not worry. If you are going to overclock, make sure you get a damn good heatsink @_@
March 2, 2010 5:52:26 PM

Srry I don't remember where I read it but I'm pretty sure it said this: "the recommended voltage for ram for the i7 is 1.5v(+/- 5%) otherwise it could damage the cpu." And If I would overclock I would buy an NH-U12P SE2 or a similar one i think that should be ok am I right?