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Which RAM for SB? - Page 2

post #11 of 16
to op you're fine with 1.65v, but if you are more comfortable with only 1.5v then go for it.

i'll tell you what the limits of the mem controller are as i plan on going close to 2v soon
will be in my thread when i do.
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post #12 of 16
Quote:
Originally Posted by AMD_Freak View Post
OC well and stable Ripjaws X Series 1866 oc 2140mhz @1.5v http://www.newegg.com/Product/Produc...82E16820231455
what timings ?
    
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post #13 of 16
IMO 1.65v could cause damage to your cpu in the long run. Intel reccommends max 1.575v. Grab a 1.5v mushkin or g.skill and see what you can get out of them.
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post #14 of 16
Quote:
Originally Posted by coolhandluke41 View Post
what timings ?
cas 10-10-10-28-T1@1.50v compare http://www.xbitlabs.com/articles/mem...ge-ddr3_6.html
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post #15 of 16
post #16 of 16
Quote:
Originally Posted by xxbassplayerxx View Post

Quite a bit of misinformation in here, so I'll clear up what I can.
First, those sticks in the OP are not D9s. D9s have been mostly been phased out because they generally require more voltage for good speed/timings (2000 9-9-9 at 1.8V and the like). As far as I'm aware, there are no 4GB D9 modules, either. With those timings 9-11-9, you're most likely looking at either PSC or Hynix BFR, both of which will overclock well.
Second, the max recommended voltage for SB is 1.5V. This is largely because the memory controller voltages (VCCIO) dropped so much with SB and to keep things "safe" there it is recommended to keep an offset of below 0.5V between the VCCIO and VDIMM.
Third, running a bit more voltage to the memory is rarely found to be detrimental. I've heard one story of a SB chip dying from what might have been too much VDIMM. On X58, I keep it below 1.75V for 24/7. On SB, most recommend ~1.65V or less, though you most likely wouldn't have issues with 1.7V or so. Many overclockers use up to 1.85V when benchmarking (running tests, not 24/7).
Finally, though I love memory and everything about overclocking it, it really is one of the least influential parts of your system. Unless you are doing very specific, memory intensive tasks, you would be hard pressed to tell the difference between 1600 9-9-9 and 2400 9-9-9, especially on a chip that already has as much bandwidth as Sandy Bridge does.
Check out Munaim1's comprehensive guide on memory for SB here as well as badatgames' thread here which discusses and provides testing results for memory on Sandy Bridge with up to 1.65V.

My experience is much different than that. with the multi set at 46 & bclk set to 103.0 the ram goes to 2196 (or so) & the machine boots in less than half the time that it does @ 50X100. Large photo open & progam startup in CS5 is under 5 seconds, 12 @ 5.0. Shutdown is 4 sec vs 12 @ 5.0. BIG difference.
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