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Failure to POST after installing new RAM - Page 2

post #11 of 13
Quote:
Originally Posted by PissFiddles;15469638 
So, given that when I attempted to run them with the same settings as the last modules, 1600MHz, 9-9-9-24 @ 1.64V, the instability would have likely been caused by either too low a voltage or too tight settings? If there is a threshold where voltage becomes too high, I imagine that would also lead to instability. 1.64V would, I assume from what I've read thus far, be too much for this RAM?

Not necessarily. While they may take up to 1.65v (may be needed for higher overclocks), some ram will not like the added volts.

The higher the voltage, the more heat is being produced. Higher volts also reduce the lifespan of the modules. Personally, I like to run my ram with the lowest voltage possible (While maintaining rated frequencies and timings), as I honestly cannot notice a boost in performance from a few hundred MHz.

Since your processor is overclocked, it's also very likely the ram isn't running at the factory rated frequency. Since we don't want to mess with the CPU overclock, lets just lower the ram multiplier and see if we're able to boot.

The CPU is overclocked by either A) Raising the CPU multiplier, or B) Raising the Base Clock. Since most processors have a limit as to how high the multiplier can go, the base clock is raised. Now, not only does that overclock the processor, it also overclocks the ram. Luckily the ram also has a multiplier, which can be lowered or raised (to an extent) in regards to the base clock.

Hope that makes sense. biggrin.gif
Edited by Shift. - 12/26/12 at 11:56am
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post #12 of 13
Thread Starter 
Successful boot at 1200MHz, 10-10-10-24-2T

However, I am encountering the same issue where Windows is only recognising 2 out of the 3 DIMMs, 12GB Installed (8GB Usable)

Any insights there?


Quote:
Originally Posted by Shift. View Post
Not necessarily. While they may take up to 1.65v (may be needed for higher overclocks), some ram will not like the added volts.

The higher the voltage, the more heat is being produced. Higher volts also reduce the lifespan of the modules. Personally, I like to run my ram with the lowest voltage possible (While maintaining rated frequencies and timings), as I honestly cannot notice a boost in performance from a few hundred MHz.

Since you're processor is overclocked, it's also very likely the ram isn't running at the factory rated frequency. Since we don't want to mess with the CPU overclock, lets just lower the ram multiplier and see if we're able to boot.

The CPU is overclocked by either A) Raising the CPU multiplier, or B) Raising the Base Clock. Since most processors have a limit as to how high the multiplier can go, the base clock is raised. Now, not only does that overclock the processor, it also overclocks the ram. Luckily the ram also has a multiplier, which can be lowered or raise (to an extent) in regards to the base clock.

Hope that makes sense.
That has cleared up a whole lot of misonceptions I had!

+rep!
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post #13 of 13
Quote:
Originally Posted by PissFiddles View Post
Successful boot at 1200MHz, 10-10-10-24-2T

However, I am encountering the same issue where Windows is only recognising 2 out of the 3 DIMMs, 12GB Installed (8GB Usable)

Any insights there?

That has cleared up a whole lot of misonceptions I had!

+rep!
Awesome! At least now we know it's just a matter of finding the correct settings. It's a little harder since you already have an overclock going that we don't want to lose.

Although it would probably be a good idea to save those settings to a BIOS Profile, and start off fresh so you can get the full hang of things. Mainly so you can really understand how each setting works, and you'll be able to troubleshoot issues much easier when they do arise.

Anyways, what we need to do now is get the ram to run at the factory frequency. It'll be a little complicated, since your base clock (BCLK) has obviously been raised. At stock settings it should be:

BCLK: 133, Ram Multiplier: x10, which is effectively 1333MHz.

ex. If your ram was 1600MHz, we'd have to raise the BCLK to 160, while using a ram multi of 10.

In your BIOS you should see what each one is at. I just listed what they would be if you loaded the BIOS defaults. Both those settings need to be adjusted in order to achieve the desired ram frequency.

Now remember, changing the BCLK will also affect the CPU frequency. So you have to keep them both in mind when making adjustments.
Edited by Shift. - 10/26/11 at 10:47pm
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six|speed
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automatic.
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CPUMotherboardGraphicsRAM
i7 4790k Gryphon Z97 Asus GTX760 OC 16GB Crucial Ballistix 
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2x 256GB Crucial MX100 H60 Windows 8.1 Pro OS X Yosemite 
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2x Dell U2414H Seasonic X650 Legacy U3 
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