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Need memory advice for Ivy Bridge build

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April 21, 2012 9:45:44 PM

I'll be building an Ivy Bridge rig soon and was wondering what speed memory would be advisable for a 4.2-4.5 Ghz overclock. I haven't oc'ed much since my AMD64 Opty so I'm not sure what speed would be required for the typical ratios I'll have to run for the stated overclock.

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a c 283 à CPUs
a c 110 K Overclocking
a b } Memory
April 21, 2012 9:52:58 PM
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Since with SB and IB (LGA1155) you can only really OC through the multiplier, selecting memory based on OC ability alone is basically pointless. IB has native 1600 RAM support though, so you can start from there and go up if you wish, just for faster RAM speeds.
April 22, 2012 5:05:20 AM

And there is not a 1:1 FSB to RAM ratio like a number of years that was preferred? Things got a lot simpler!!!
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a b à CPUs
a b K Overclocking
April 22, 2012 5:08:01 AM

Remember, the returns from anything over 1600mhz decrease, fast.
a c 283 à CPUs
a c 110 K Overclocking
a b } Memory
April 22, 2012 5:14:15 AM

augerpro said:
And there is not a 1:1 FSB to RAM ratio like a number of years that was preferred? Things got a lot simpler!!!


Yeah, it's because FSB on SB and IB (the LGA1155 version, like I said because SB-E LGA2011 is different) is linked with PCIe/PCI and SATA and can't be unlinked, so overclocking the FSB overclocks everything, which is bad, lol. You CAN go up to 105-108 MHz on the FSB, but any more than that causes data corruption and instability. So yeah, it's pretty easy with SB/IB, just multi and voltage to think about, now.

And gary is right, there's less of a performance increase than you would think as you go up in RAM speeds.
April 22, 2012 5:19:19 AM

Best answer selected by augerpro.
April 22, 2012 5:19:36 AM

Thanks guys for advice!
April 22, 2012 7:07:27 AM

IB supoprts both 1.5v and 1.35v ram, btw.
a b à CPUs
a b K Overclocking
a b } Memory
April 22, 2012 8:23:33 AM

you can OC memory, seperately from the 100MHz signal. but there are few returns, get better timings for as much benefit.
!