Explanation of ram in i5 ivb

carlazai

carlazai

carlazai

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I am a little confused about ram and overclocking in my ivybridge. In the old days i oc from the FSB and good ram was necessary. With my IV i5 i just whacked the multiplier up to a level where i considered the temps safe for d2d operation (63C at full tilt and everything going).

I was messing around in the bios and noticed that my ram xmp profile was disabled. Before i change anything should i put profile 1 on and accept the changes to the multiplier etc? What performance increases can be had from this? And is better ram a way to achieve better oc or is there a guide i can read?

Many thanks for any help.
 
On IB the memory multiplier set by the XMP profile should do very little to the OC on the chip (at that speed anyway). The bus is a flat 100 and clocking is done directly from the multiplier on the CPU.
 
What is the point of extra fast ram with i5 chips? Does it allow the multiplier to go higher? A little confused so a quick 101 course would help me if you know of 1.
 
Faster ram will always be suited better to a higher OC (slow ram, high CPU OC voids the point of a CPU OC in some cases).

8 Pack may be a better person to explain it all in greater detail, but how high you can take the CPU with high speed memory depends how well the IMC copes on the chip.

As a guess I'd say you'll be fine with most mainstream memory speeds (1600-2400mhz) at 4.5ghz, a larger factor to getting a higher OC on IB will be temps rather than the memory
 
Memory clocks made little to no difference unless you are benchmarking, and they shouldn't affect clocks on IVB because the Core Clock is the only part connected to both RAM and CPU and it can hardly budge from 100Mhz.
 
with sb/ib memory speeds are set to specific speeds in a list,all you do is select which speed that matches your ram,all overclocking is done through the cpu multiplier and not by raising the bclk,bclk is left at 100mhz thats why it doesnt alter your ram speed
 
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