Asus Rampage V Extreme, i7-5930K & 3400MHz RAM Overclocking

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m3ntza

m3ntza

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Jan 23, 2014
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Hello there

I finished up my new pearl and got to the point I want to OC and there I got stucked.

My Specs are :

Case : Lian Li PC-07OS
MoBo : Asus Rampage V Edition 10
CPU : i7-5930K
CPU Cooling : Corsair H100i v2
PSU : Corsair RM1000i
RAM : Corsair Vengeance LED 32GB RAM (4x8GB) @ 3400MHz
GPU : Asus GTX275 (Yes... waiting for my GTX1080 xD )
Storage : Samsung 950 PRO m.2 SSD

I have started to OC my CPU and got 4400MHz @ 1.3V stable with BCLK @ 100. Everything tested via Aida64 and ROG Realbench.

So now I have to get my hands on my RAM modules and there is where I stuck. If I enable the XMP profile it changes my BCLK to 170 and my Multiplier to 22 = 3740MHz

I read that BCLK shouldn't go above 125. Is it true ? Can you help me and OC my system properly ?

Is there any danger getting such high base clocks ? Do you recommend any other settings to archive maybe 4.5GHz ?

My actual temps at full load are not reaching 73c.

Many Questions :pt1cable::??::pt1cable:



 
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scuzzycard

scuzzycard

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Feb 26, 2016
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There's a setting called 'CPU strap." This keeps the PCI-E bus from being overclocked when BCLK is raised. As long as the strap and BCLK match, the system should be as stable as it would be at 100MHz BCLK. In this case, the CPU strap is probably 167 to go with a BCLK of 170. 170*167/100 = 101.8. This is the same overclock of the PCI-E bus as a 101.8MHz BCLK, which is usually well-tolerated.
 
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m3ntza

m3ntza

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Jan 23, 2014
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WoW !

So if I enable XMP, Get the BCLK to 170, set the multiplier to 26 (=4.420MHZ) all will be fine ? Do you think I will have to play with the vcore again or let it be @ 1.3?

Edit : 170*167/100 = 101.8... That confused me :S
 
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m3ntza

m3ntza

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Jan 23, 2014
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Ok done what told before, and it hang on windows boot with multiplier x26. Changed Vcore to 1.3125 and again nothing. Now im running 170x24 with vcore 1.3 . That's not a good result :/

Any other suggestion to try ?
 
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scuzzycard

scuzzycard

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Feb 26, 2016
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Try raising system agent voltage to 1.2.

3400MHz RAM will be very difficult for the Haswell-E memory controller without some tweaking - sorry, I should have said that earlier. You might end up having to run it at 3000 or 3200, or with looser timings, but try my suggested settings first.
 
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m3ntza

m3ntza

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Jan 23, 2014
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Ok with SAv 1.2 got BS after benchmarking. Both on 170x22 and x26

That is very tricky. Sadly I cannot upload images here.

What do you suggest for 4.4-4.5GHz and let say 3173MHz ? Is there anything else we can try?

Thank you for your effort
 
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m3ntza

m3ntza

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Jan 23, 2014
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Ok seems I found stable OC for 4.462.5MHz and Ram Frequency 3400

Vcore : 1.3
CPU Cache Voltage : 1.3
CPU Strap : AUTO
BCLK Freq : 127.5
CPU Multiplier : All core same
CPU Core 1 : 35
CPU Cache Ratio : 20
DRAM Voltage : 1.4
System Agent Voltage : 1.0625
CPU Input Voltage : 1.85
The CPU Power at full load is about 165-171W

I tested with AIDA64 and Realbench for 15 mins with 14gigs and is said passed...

Do u think there is something I should tweak a bit ?
 
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