I have an i7 920 CPU running with turbo mode on but with C-states and C1E disabled. I have to turn on C-states in my BIOS to have turbo mode run single core apps at 2.93GHz which is the advertised speed for single core mode with turbo on for the i7 920. When I do this I noticed FSX runs about 5-10% slower with C-states enabled than when I just keep C-states disabled and just have all 4 cores run at 2.8GHz all the time with just having Turbo on. I lose out on the higher single core speed though in which turbo mode is suppose to do. Does anyone know why running with these C-states turned on would slow down FSX even though my CPU will run faster if one core is used and the others are idle? Also I get weird quiet squealing noises coming from inside my computer when C-states and C1E are turn on when browsing internet sometimes and it happened on both of the same motherboards in which I returned the first one so I don't think it's worth keeping C1E and C-states turned on anyways. I have a Gigabyte EX58-UD4P motherboard.

I have an Asus P6T Deluxe v2, but assuming that C-State on my MB means the same thing as C-State on your MB this is what I think maybe happening. With C-State enable you enable a power saving mode and the CPU/MB is going in and out of a power saving mode all the time and causing FSX to run slower.For better overall system performance you would probably be better off with Turbo mode, C-State and C1E disabled at all times, this way your CPU will run at a constant speed and stop clocking up and down all the time as CPU load goes up and down.If you have replaced the stock Intel CPU heatsink and fan combo with a better one, overclock your CPU. Most people with an i7 920 get to 3.8GHz on air without a problem and a lot get to 4.0GHz and above on air.

I have an Asus P6T Deluxe v2, but assuming that C-State on my MB means the same thing as C-State on your MB this is what I think maybe happening. With C-State enable you enable a power saving mode and the CPU/MB is going in and out of a power saving mode all the time and causing FSX to run slower.For better overall system performance you would probably be better off with Turbo mode, C-State and C1E disabled at all times, this way your CPU will run at a constant speed and stop clocking up and down all the time as CPU load goes up and down.If you have replaced the stock Intel CPU heatsink and fan combo with a better one, overclock your CPU. Most people with an i7 920 get to 3.8GHz on air without a problem and a lot get to 4.0GHz and above on air.

It's actually called something like C1 C2 C3 states in the bios of my motherboard. If I just leave Turbo on but C1E, EIST, and C1 C2 C3 states disabled then the cores it seem to run at 2.8 GHz all the time. Ran prime95 and it never throttled according to CPU-Z. I do more than just game on my PC. I also use my PC for work and school work so I rather not overclock.

If you have replaced the stock Intel CPU heatsink and fan combo with a better one, overclock your CPU. Most people with an i7 920 get to 3.8GHz on air without a problem and a lot get to 4.0GHz and above on air.

If it were that easy! I have an i7 920 with a Noctua-U12P SE1366on a Gigabyte GA-EX58-UD5 mb. I was determined to do some overclocking, found a beginners type website where the guy had screen shots of the procedure. I printed out the screens and set to. I came to a screeching halt when I discovered that the BIOS he depicted wasn't the same as mine...I chickened out! :( The thought of something going bang because I got an acronym wrong freaked me out. :( Sorry to interfere in your thread but the way overclocking is treated in such an off hand manner makes me feel such a wimp.

If it were that easy! I have an i7 920 with a Noctua-U12P SE1366on a Gigabyte GA-EX58-UD5 mb. I was determined to do some overclocking, found a beginners type website where the guy had screen shots of the procedure. I printed out the screens and set to. I came to a screeching halt when I discovered that the BIOS he depicted wasn't the same as mine...I chickened out! :( The thought of something going bang because I got an acronym wrong freaked me out. :( Sorry to interfere in your thread but the way overclocking is treated in such an off hand manner makes me feel such a wimp.

My current system is the first that I overclocked and what made it so easy for me was the fact that I was given specific BIOS settings for my MB to get to a 4.2GHz overclock and then I was given specific instructions for what to do once I got there if the clock proved unstable. I agree that if you are going into this cold it can be disturbing, but once I got exposed to it overclocking really is not that hard.One thing that I did was to read five different i7 920 overclock guides before I even started, that got me familar with the terms and the rules of thumb that you need to follow.It is easy to OC, the hard part is making sure that your OC is stable. That takes time to run the stress tests and then it is just a matter of tweaking your voltages and some BIOS setting until you get it stable. I only have experience with the Asus P6T Deluxe v2 MB so this BIOS is the only once I feel quailified to even give any advice. When people run into trouble overclocking a lot of times it is because your memory is unstable or your CPU HS is not mounted correctly and the CPU is getting to hot. You use a temp monitoring program to make sure your CPU is not getting to hot.There is a great overclock forum at www.overclock.net, they have both Intel and AMD forums. I suggest that you go over there and join and then get some advice that is specific to your CPU and motherboard combo.

How do you get to 4.2 with Turbo mode disabled?If I raise BCLK my memory frequency would raise too, right? My memory is 1600Mhz and right now I have 20x200... and I get exactly 1600MHz.. so I raise it I'd get higher frequency.. is this ok? Than I should probably raise some voltages somewhere.

The BCLK affects the memory frequency, but the CPU multiplier does not. My BCLK is 200 and my CPU multiplier is 21. Download this i7 calcuator and you can see what I mean.http://www.softpedia.com/get/System/System...halemCalc.shtmlAll you need to do is the raise your CPU multi to 21 and like you said you may have to adjust some of your voltages, you will just have to see. I will say that once I got my system stable enough to pass 1 hour of OCCT and 8 hours of Prime95 I still got a BSOD every 7 to 10 days, I then had to go in and further tweak voltages until I got everything stable.My voltages are below. When you see something like 1.30625 01/24/10 - 1.31250 02/07/10 that means on 1/24 the voltage was 1.30625 and on 2/7 I raised it to 1.31250CPU Voltage: 1.30625 01/24/10 - 1.31250 02/07/10 - 1.32500 02/15/10CPU PLL Voltage: Auto 01/24/10 - 1.82 02/17/10QPI/DRAM Core Voltage: 1.34375 01/24/10 - 1.35000 02/07/10 - 1.34375 02/20/10IOH Voltage: Auto 01/24/10 - 1.20 02/17/10ICH Voltage: Auto 01/24/10 - 1.20 02/20/10DRAM Bus Voltage: 1.66Load Line Calibration: EnabledCPU Spread Spectrum: DisabledPCIE Spread Spectrum: Disabled

0Artur0,I noticed that you have a 920, the 920's multipler can only go to 20, I have a 950 so I can use 21. To get to 4.2 you will have to raise your BCLK.You can raise it to 210, that would put your ram at 1680. This would probably not be a problem at all for your ram if you got some decent ram and you have your dram voltage set within the specifications of your ram.

I noticed that you have a 920, the 920's multipler can only go to 20, I have a 950 so I can use 21. To get to 4.2 you will have to raise your BCLK.

The 920's also can have a multiplier of 21. At least mine does.

The 920's also can have a multiplier of 21. At least mine does.

In the BIOS for overclocking the 920 only has a multiplier of 20.http://www.bit-tech.net/hardware/cpus/2010...versus-i7-930/1When you are looking at CPU-Z and you see yours set at 21 it is because Turbo mode is enabled and the CPU is under load. Also Turbo mode will only overclock the first core with a multipler of 21, the other three cores are still at 20. As soon as the load on the CPU is removed the multiplier on the first core drops back to 20.If you want a CPU Multipier of 21 to be active at all times, on all cores regardless of CPU load you have to have a 930 or above.

I thought that for the sake of being correct I would let everyone know something that I found out. If you have a motherboard that will let you do it you can set the 920 to 21x if you have turbo mode disabled. This will allow the 21x multiplier to be used on all cores.The below is a response I got to my question on overclock.net after someone told someone to use 21x on their 920.--------------------------------------------------------------------------------Quote:Originally Posted by idahosurge Everything that I have read on the net says that an 920's multiplier only goes up to 20, did that change and now they can go to 21? Intel says you can go to 21x multi on one core with the 920, 22x multi on one with the 930; many boards nowadays found a way to make it so that all cores go to 21x when you disable Turbo and set it manually (What I'm currently doing with my P6T), and 22x on the 930 (which has been done numerous times). __________________Anyway I just wanted to let anyone interested in a 920 and a 21x multiplier that it is possible depending on the motherboard that you have.