You did not mention your cooler, that will make a big difrence in what you OC to, 3.6 is in the middle of what is needed to get your 920 OCed and your memory at 1600, 3.34 would be a better goal, As 161 clocks x 21 would put you there and a 2:10 would put your memory at 1600. of course you could drop cpu multaplier to 18 with 200 clocks and have your memory at 2:8 and be at 3.6 with 1600 memory, but again I don't know your cooling situation.
 
Here are a few links to brouse.

http://www.maximumpc.com/article/features/ultimate_core_i7_overclocking_guide_we_push_nehalem_its_limits?page=0%2C0


http://hothardware.com/Articles/Intel-Core-i7-Overclocking--A-HotHardware-HowTo/

 
 

According to the review your cooler is just a tad better than my NH-U12P-SE , http://www.techpowerup.com/reviews/CoolerMaster/V6GT/5.html so you should be able to obtain 200 clocks and use a 2:8 memory multaplier to maintain 1600 memory speed. If your memory is XMP you can use CPU-Z to see your memory timing in the SPD tab. Your DimmV and timing will show there use the 800 speed colum as your memory is DDR ( double data Rate ) so 800= 1600. for a 2:8 memory multaplier set uncore to 16X. your CPU speed will be your cpu multaplier times your frequency you will likley loos a .5 hertz from whatever you set so with a CPU multaplier of 18 you would be at 18x199.5 or 3.591, with a 19 at 3.79, with a 20 , 3.990, and with turbo on at 20 for a 21, 4.189. If you use the Vdroop feature you will likley need around 1.375 Vcore, without Vdroop, around 1.325, and I suspect you would need a +150 Vtt for 6G of memory or +250, for 12G. Set command rate for 2T for 12G or 1T for 6; You will want to turn off speed step, while you are overclocking but can turn it back on when done if you want that feature,  that feature allows your system to down clock at lower demands, and your cpu multaplier can drop to 12 to put you about 2.4 when not stressed. You are going to want to avoid the sleep features over 188 clocks, as they are hard to get them to operate reiliable that high. you will likley need less v core and Vtt than me if you settle at the 3.6 speed, as I am pushing the 4.0


 
This is when I was running 201 host freq for mem at 1600.
  
The links I provided above in post 2 should show you where to make the changes in BIOS, and the video uses a 920 and EVGA BIOS.

The first guide it's very very good, after reading it I could understand what you where talking about.
 
Your last idea puts me right into 3.6 GHz with my RAM in 1600 MHz, but it makes me wonder about 2 things:
 
1. If I use the turbo mode then it will reach 4.2 GHz. Is it safe with my cooler?, should I use it or should I deactivate turbo mode?
 
2. With that rates, the GT/s will be 7.2 GT/s for the QPI and I have read that more than 7 GT/s causes inestability...
 
Hafter reading the first guide my choice could be 175x20 2:10, but that will give me a 1750 MHz for RAM and that's way too much.
 
Of course, all this is without touching voltages.
 
What else could you tell me?

I try 200x18 @ 2:8 but it shows me a nice BSOD starting P95.
 
Right now I'm in 3.6 GHz with 180x20, but RAM it's lowered to 1440 MHz...
 
Wat advice can you give to get up the RAM frecuency?

skyx26

I try 200x18 @ 2:8 but it shows me a nice BSOD starting P95.

Right now I'm in 3.6 GHz with 180x20, but RAM it's lowered to 1440 MHz...

Wat advice can you give to get up the RAM frecuency?

You have to increase the Base Clock some more. Only way to increase the RAM frequency to spec, or have higher frequency ram and up the Memory Divider.

What if I modify the voltages?
 
I'm now in Vcore 1.27v, VTT 1.1v.

At 200x18 2:8 this is my BSOD:
 
freeimagehosting.net/5530d
 
So, right now I'm pretty much stuck at 3.4 GHz and 1600 MHz for RAM... 
 
 
 

Men, that was a very, very nifty solution. I got my 3.6 GHz and RAM gets 1540 MHz (it's not 1600 but I'm not going to complain for 60 MHz) and without touching the voltages.
 
So far the system looks stable, I'm going to smash it in the next days to see if it remains so or crash. My temps don't go over 73ºC for the cores and 55ºC for the CPU, so it's really a very good cooler.
 
Thank you so much for the help.