http://www.xbitlabs.com/articles/mainboards/display/asus-p7p55d-deluxe.html
This is the same bios I use, my motherboard just has a few less hardware features. Settings seem identical. Basically if you change the CPU Ratio (this is Asus speak for multiplier) from auto the speedstep and turbomode settings disappear.
I enabled C-State, thanks for the heads up. One question, if opens up a new option menu with auto/c1/c3/c6...I set it to c6 , does that sound right?
I think I'm going to end up trying to do 3.2ghz (160x20) with turbo mode disabled once I get a better HSF. That way I'm getting my memory performing where it should be, and hopefully it will only take a small voltage bump.
I'm running memory at 1333 and have CPU with turbo mode on right now.
You can leave the second C-State option menu at [Auto] and since I don't know what the individual C-States are, I'd recommend [Auto]. My i7 860 would use the 24 and 26x multipliers when 2 and 1 core were stressed with auto.
Oh, yeah, if you adjust the multi, then yeah the turbo boost will disable itself. They're assuming that you're either underclocking (no idea why you'd do that on i7) or that you've upped the BCLK and are now running higher overall mhz than the base 133x20.
Regarding memory, what happens when you go from [Auto] to [X.M.P.] in the Ai Teaker menu? Otherwise, unless you actually want to overclock and disable the power saving features, the difference between 1333mhz and 1600mhz memory is basically 0.5% performance maximum. Higher speed memory is useful in 2 situations, both overclocking;
1) Benchmarking since they tend to read memory speed and core speed above all else and
2) Overclocking, not to necessarily get to that speed, but because they provide lots of BCLK headroom when you can drop the memory multiplier.
Bit of an explanation, memory strap or multipliers tend to run in ratios of 2:3 (6x), 2:4 (8x), 2:5 (10x) of BCLK to RAM speed.
It we run at the maximum memory strap of 2:5 (10x133 BCLK, 1333mhz speed memory) when you get to a BCLK of like 180 your stock 1333mhz memory is now running at 1800mhz and is overclocked quite a bit. If you had purchased 1333 max speed memory you'd be unstable, if you even managed to get into Windows.
Now, if we drop the strap to say 2:4 at this 180 BLCK (8x180 BCLK) we're at 1440mhz, we're still over our stock 1333 memory. So we need to drop down to 2:3 (6x180 BCLK) we're now at 1080mhz and now within the rated spec for our memory.
If you buy 1600mhz rated memory then you can run the 2:4 memory strap (1440) without any issues using the X.M.P. profiles to get the timings they're rated at for 1600mhz without any worry about stability since they can handle faster speeds. And if you want to spend the time to actually overclock your memory you might be able to run the 1800mhz but memory overclocking and testing is a bit more involving than just the CPU.
So please, don't make the 1600mhz memory speed your end all be all target to get to on a default CPU. Use higher speed memory as a way of providing yourself some BCLK headroom without any worries for the RAM on the OC'ing side of things. Personally, the price difference between 1333 and 1600 makes it worth it to buy the 1600mhz speed stuff since it's practically the same cost. The price difference between 1600 and 1800 and 2000mhz gets to be astronomical and the performance is just not there with the integrated memory controllers on these CPUs. Overal performance between 1333mhz and 2000mhz is on the range of maybe 5% max in anything anybody will do in the real world outside of artificial benchmarks. I'm running my i7 860 (kind of a dud chip) at 3.75ghz with a 187.5 BCLK so my memory is only at 1500mhz compared to the 1600mhz it's rated for. I actually compared 198x19 (3.76ghz) and 187.5x20 (3.75ghz) and got nearly the same GFLOPS in a LinX stress test (variance was +/- .5 gflop between the two and even in the same 20x runs for each configuration the variance was +/- .5 gflop).
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