Hi,Ok, well it looks like I'm done as far as the overclock is concerned. I know a few people asked me to post my settings. The final overclock speed is set at 143x30=4290GHz. The Max temp I've seen is 65 Degrees, this is on air folks. Just about a 1GHz overclock, absolutely incredible.ASUS P6T Deluxe V2 AI Settings-------------------------------------------------AI Overclock Tuner: X.M.P.Profile Info: 2000MHz-7-7-8-20-2N-1.65V-1.60VCPU Ratio Setting: 30.0Speed Step: DisabledBCLK Freq.: 143PCIE: 100DRAM Freq.: DDR3-2006MHzUCLK Freq.: AUTOQPI Link: AUTOCPU Voltage: 1.32500QPI/DRAM Core Voltage: 1.60000DRAM Bus Voltage: 1.64All other voltage settings are set to auto.

Hi,Ok, well it looks like I'm done as far as the overclock is concerned. I know a few people asked me to post my settings. The final overclock speed is set at 143x30=4290GHz. The Max temp I've seen is 65 Degrees, this is on air folks. Just about a 1GHz overclock, absolutely incredible.ASUS P6T Deluxe V2 AI Settings-------------------------------------------------AI Overclock Tuner: X.M.P.Profile Info: 2000MHz-7-7-8-20-2N-1.65V-1.60VCPU Ratio Setting: 30.0Speed Step: DisabledBCLK Freq.: 143PCIE: 100DRAM Freq.: DDR3-2006MHzUCLK Freq.: AUTOQPI Link: AUTOCPU Voltage: 1.32500QPI/DRAM Core Voltage: 1.60000DRAM Bus Voltage: 1.64All other voltage settings are set to auto.

Nice numbers. Can you run it @ 4.0GHz and 4.29GHz and see a difference?Although the vQPI looks a little high for a D0, I thought they were supposed to correct the high vQPI issue.-jk

The Max temp I've seen is 65 Degrees, this is on air folks.

Is that temp while running OCCT?

Hi,Ok, well it looks like I'm done as far as the overclock is concerned. I know a few people asked me to post my settings. The final overclock speed is set at 143x30=4290GHz. The Max temp I've seen is 65 Degrees, this is on air folks. Just about a 1GHz overclock, absolutely incredible.ASUS P6T Deluxe V2 AI Settings-------------------------------------------------AI Overclock Tuner: X.M.P.Profile Info: 2000MHz-7-7-8-20-2N-1.65V-1.60VCPU Ratio Setting: 30.0Speed Step: DisabledBCLK Freq.: 143PCIE: 100DRAM Freq.: DDR3-2006MHzUCLK Freq.: AUTOQPI Link: AUTOCPU Voltage: 1.32500QPI/DRAM Core Voltage: 1.60000DRAM Bus Voltage: 1.64All other voltage settings are set to auto.

MikeThanks for this.I'm curious as to whether you've chosen these speeds because you couldn't get it to go faster, or because it got too hot for your liking at higher speeds, or because you needed voltages you were unhappy about, or because it lost stability etc. Or did you just "stop" at these settings without trying anything further? Basically I'm looking for any insight you have into how far this thing CAN go on air, and how to get there, because my new 975 PC arrived recently and - when I have the time - I would like to be able to push it to 4.4GHz on air if at all possible.Tim

Hi,Ok, well it looks like I'm done as far as the overclock is concerned. I know a few people asked me to post my settings. The final overclock speed is set at 143x30=4290GHz. The Max temp I've seen is 65 Degrees, this is on air folks. Just about a 1GHz overclock, absolutely incredible.ASUS P6T Deluxe V2 AI Settings-------------------------------------------------AI Overclock Tuner: X.M.P.Profile Info: 2000MHz-7-7-8-20-2N-1.65V-1.60VCPU Ratio Setting: 30.0Speed Step: DisabledBCLK Freq.: 143PCIE: 100DRAM Freq.: DDR3-2006MHzUCLK Freq.: AUTOQPI Link: AUTOCPU Voltage: 1.32500QPI/DRAM Core Voltage: 1.60000DRAM Bus Voltage: 1.64All other voltage settings are set to auto.

WOW :( Just wondering: can you measure its raw GFLOP power using SiSoftware Sandra @ 4.29GHz? I suspect it will show something like 100 GFlops. this is a hell of a lot of computing power: a mini supercomputer. FSX will be running like pacman. I am just wondering how well such a system would run on a 42inch Philips FTV at FullHD resolution 1920x1080p :(Com-on Intel, drop the price for the poor people :(

Hi Tim,BTW: Today I saw a momentary max temp of 69 degrees, this happened during REX's initial FSX setup. It then dropped back down to 65 degrees.I chose the above settings for a couple of reasons.1. I'm comfortable with a max temp of 69 degrees.2. The max safe voltage for the CPU is 1.375 at 1.325 it gives me some play due to any fluctuations that may occur.3. Since this is an FSX only computer, I don't think I'm going to see any noticeable improvements by pushing the chip any further (risk vs benefit / $1,100.00 chip, better safe than sorry).Hi ulf b,No this is not while running OCCT, since this is an FSX only computer I did everything I could to get the system stable while running FSX and all third party software associated with FSX. Although the computer has not been online all that long, I have been unable to crash the system.Hi simjunkie,The only thing I noticed between 4.0GHz and 4.29GHz is the ability to turn up the airport environment (up one notch).Hi neutronium76,I do not have SiSoftware installed. I want to keep the system as clean as I possible can, the only software installed is what is needed to run FSX, this includes third party software. The only other software installed is what is needed to keep the system defragmented, as well as Real Temp to monitor the system temps. Other than that, there is nothing else installed in the system.Hope I didn't miss any questions.

Hi Tim,BTW: Today I saw a momentary max temp of 69 degrees, this happened during REX's initial FSX setup. It then dropped back down to 65 degrees.I chose the above settings for a couple of reasons.1. I'm comfortable with a max temp of 69 degrees.2. The max safe voltage for the CPU is 1.375 at 1.325 it gives me some play due to any fluctuations that may occur.3. Since this is an FSX only computer, I don't think I'm going to see any noticeable improvements by pushing the chip any further (risk vs benefit / $1,100.00 chip, better safe than sorry).Hi ulf b,No this is not while running OCCT, since this is an FSX only computer I did everything I could to get the system stable while running FSX and all third party software associated with FSX. Although the computer has not been online all that long, I have been unable to crash the system.Hi simjunkie,The only thing I noticed between 4.0GHz and 4.29GHz is the ability to turn up the airport environment (up one notch).Hi neutronium76,I do not have SiSoftware installed. I want to keep the system as clean as I possible can, the only software installed is what is needed to run FSX, this includes third party software. The only other software installed is what is needed to keep the system defragmented, as well as Real Temp to monitor the system temps. Other than that, there is nothing else installed in the system.Hope I didn't miss any questions.

MikeThanks for that.I plugged mine in a short time ago, having first dis-assembled the whole thing to install a Noctua CPU heatsink and fans. I used your exact settings (combined with Nick_N's recommendations) but with a 31 multiplier and 1.35v. I'm running OCCT and so far all is well at 4432MHz, although temperatures are extremely high: 83 degrees measured by Realtemp.If this clock is stable with OCCT, then I'll see what happens with FSX if I get time to install it over the next few days.Tim

MikeJust a recommendation.As simjunkie already wrote, the QPI Voltage is a bit high. Keep in mind that a high QPI Voltage can also damage your CPU over time. Personal I would not go over 1.45 QPI for 24/7. Only for short overclocking Sessions I set higher QPI Voltage.I know some Memory manufactures say that it is save to set even 1.8V QPI for 2000MHz Mems, but Intel max. Specs are only 1.35V. For the newest RAM Modules in combination with an i7 D0 it is no Problem to keep QPI below 1.45V.And for your 975, as long as the Temps are below 80-90C, the VCore can set to 1.45 for 24/7.greetings and lots of fun with your great System.

Hi crashmax,A QPI Voltage of 1.45 will not boot the system. It is my understanding that Intel warned of long term damage to the memory controller if the voltage was set above 1.65 volt as well as damage to the CPU. I also believe the QPI must be within .5 of a volt from Dram voltage to avoid damaging the CPU. A QPI of 1.45 would put me well below the .5 Volt difference between QPI and Dram.1.6 volt would keep me under the limit set by Intel (1.65) and keep me within the .5 volt difference between the QPI and Dram. The memory installed is Corsair's: TR3X6G2000C7GTFMaybe Nick can shed some light on this.

MikeJust a recommendation.As simjunkie already wrote, the QPI Voltage is a bit high. Keep in mind that a high QPI Voltage can also damage your CPU over time. Personal I would not go over 1.45 QPI for 24/7. Only for short overclocking Sessions I set higher QPI Voltage.I know some Memory manufactures say that it is save to set even 1.8V QPI for 2000MHz Mems, but Intel max. Specs are only 1.35V. For the newest RAM Modules in combination with an i7 D0 it is no Problem to keep QPI below 1.45V.And for your 975, as long as the Temps are below 80-90C, the VCore can set to 1.45 for 24/7.greetings and lots of fun with your great System.

Hi MikeThe best Memes you can get today you have! :( There is a Thread about your Mem on XtremeSystems http://www.xtremesystems.org/forums/showth...641&page=14 you will see some can set this Mem to 1.45 QPI but the CPU VCore must be higher then yours.One other important thing is to update your BIOS, if you have not already do this, as a new BIOS Version often will increase the Memmory compatibility and stability.But anyway, every System is different, so set what you feel save with and enjoy. As I said it is just a recommendation from a overclocker and FSX fan :(

Hi crashmax,A QPI Voltage of 1.45 will not boot the system. It is my understanding that Intel warned of long term damage to the memory controller if the voltage was set above 1.65 volt as well as damage to the CPU. I also believe the QPI must be within .5 of a volt from Dram voltage to avoid damaging the CPU. A QPI of 1.45 would put me well below the .5 Volt difference between QPI and Dram.1.6 volt would keep me under the limit set by Intel (1.65) and keep me within the .5 volt difference between the QPI and Dram. The memory installed is Corsair's: TR3X6G2000C7GTFMaybe Nick can shed some light on this.

MikeI think 1.60v for QPI might actually break the CPU. You might find this post helpful:http://www.xtremesystems.org/forums/showpo...p;postcount=877The trouble - in my case - is pretty simple. If I want to use my nice 2000MHz RAM at full speed, I need a very high QPI voltage or a dangerously high VDIMM voltage (about 2v). And to make it worse, the system is not stable under OCCT. But if I settle for c.1700MHz, I get a (so far!) stable system with 1.35v both for vCore and QPI (and better temperatures as a result). This is at 4.4GHz on 142 bClk x 31 multiplier.There may be some clever spark who knows what other settings to fiddle with that can deliver 2000MHz without breaking all the voltage limits, but for the time being I'm going to wait rather than discover the limits for myself the hard way.Tim

Hi crashmax,A QPI Voltage of 1.45 will not boot the system. It is my understanding that Intel warned of long term damage to the memory controller if the voltage was set above 1.65 volt as well as damage to the CPU. I also believe the QPI must be within .5 of a volt from Dram voltage to avoid damaging the CPU. A QPI of 1.45 would put me well below the .5 Volt difference between QPI and Dram.1.6 volt would keep me under the limit set by Intel (1.65) and keep me within the .5 volt difference between the QPI and Dram. The memory installed is Corsair's: TR3X6G2000C7GTFMaybe Nick can shed some light on this.

Mike, that 0.5v difference is certainly correct and everyone definitely want's to stay within that. But I think you're getting your voltages mixed up. The max Intel spec on the vQPI is 1.35v, not 1.65v. The RAM max spec is 1.65. Even if you ran 1.25 vQPI you'd still be within the 0.5v "zone-of-safety", although I know it wouldn't boot @ DDR2000. So you could very safely run 1.50 vQPI and that's only 0.15v difference from the 1.65 vDIMM. I still think the 1.60v QPI is high and I'd try to get that down somehow. -jk

Hi Everyone,I just got off the phone with Corsair, as far as voltage they told me to set the following.CPU: 1.35vDRAM Bus: 1.64vQPI/DRAM :1.6vI set it and it runs fine. I'm in the process of lowering the QPI/DRAM, Lets see how low I can go.

OK, here's another look at the beast known as the i7 975. And what a beast it is.Bottom line, my best OC with the 975 on ~20 deg water was stable for an hour on OCCT at 4.54 GHz, with core temps in the mid 50s. A couple brief excursions to 56 deg was the max temp I saw on water at any speed. At 4.54GHz, the limiting factor was Intel's absolute max Vss of 1.55v-the board was reporting 1.50v, close enough to the wall that I watched it on an oscilloscope to be sure. 4.27 GHz looks like the sweet spot, after that the expected parabolic ramp-up in voltage per clock increase occurs. But 4.27 GHz with core voltage below the recommended 1.375v and temps in the mid 40s looks like one heck of a platform to build on. And 4.4 is still doable with core voltage elevated a bit to 1.4 volts and temps around 50 deg C. Can't wait to get FS9/FSX loaded up on the SSD today.The system config and full range of specs and settings is below. The biggest difference between my system and Mike's is I built a custom water-cooling system for the CPU--an external tower with two triple-fan 360mm XSPC radiators, a Swiftek MCP655 pump, and a Swiftech GTZ "special" (all-metal) water block, all connected by half-inch Tygon tubing. The engineering design spec was for a max inlet temp of 5 deg C above ambient--it has exceeded that, and runs at +2 deg at moderate overclocks to a max of +4 deg C after an hour at the max OC. Ambient temp in my basement hobby room was 18-19 deg C (64-68 deg F). The loaded core temps at 4.54GHz were the same as the Intel stock cooler at 3.33GHz!The Mushkin Redline DRAM performs superbly. It's rated at CAS 6 (6-6-5-18-1T) at 1600 MHz, and I was able to run it at 1704 MHz at the same timings, including a 1T command clock--not having to drop to 2T is huge. I first started with 12GB and could not get the RAM to run faster than 1333 MHz with a 2T command clock and a pretty wide tRFC...that experiment failed.The Cooler Master HAF932 case has enormous (and whisper-quiet) 230mm fans in the lower front (blows across drive bay), side (blows onto mobo), and top (exhaust). I think many folks forget about cooling the rest of the system when going to water, and I opted for an extremely well-vented case in addition to keeping the water plant external (keeps most of the potential leak points outside the PC, and allows good airflow to the rest of the PC). In fact, the only thermal parameter that wasn't wonderful was the temp on the voltage regulator, which reached 70 deg C at the max OC, and hovers around 60 most of the time. I'm still looking at that one. System config:Intel i7 975EE processoreVGA X58 3X SLI motherboard (158-BL-E758-A1)3x2GB Mushkin Redline 998729 rated @ 1600 MHz 6-6-5-18-1TeVGA GTX285 1185-AR video card (2GB & not factory overclocked)PC Power and Cooling Silencer 910W single-rail power supply300GB Western Digital Velociraptor 10,000 RPM HDD160GB Intel X-25M SSDCreative Labs Audigy 2 ZS PCI sound cardCooler Master HAF932 case (3x230mm and 1x140mm fans)Test configs (all stable for at least 1 hr on OCCT v3.1.0):Voltage settings Auto except as listed. Vdimm was 1.65v for all tests. "without Vdroop" selected--mobo bumps voltages to counteract VdroopNumbers in parens are actual observed valuesHT and Turbo disabled3.33 GHz (stock) on Intel stock coolerBCLK 133CPU Mult 25CPU Vcore Auto (1.29v)CPU VTT Auto (+200mv)QPI PLL Vcore 1.325vQPI 6.4GT/sIdle Temps 30Load temps 523.83GHz on water (300 liters/hr, 6 fans at 35CFM each)BCLK 142RAM 1704 MHz at 6-6-5-18-1T (12x/2:12 mult)CPU Mult 27CPU Vcore Auto (1.35v)CPU VTT Auto (1.41v)QPI PLL Vcore 1.325vQPI 6.8GT/sIdle Temps 30Load temps 42 peak 454.27GHz on water (300 l/h, 6x35 CFM)BCLK 142RAM 1704 MHz at 6-6-5-18-1TCPU Mult 30CPU Vcore 1.31875v (1.33v idle, 1.35v load)CPU VTT Auto (1.41v)QPI PLL Vcore 1.325QPI 6.8GT/sIdle Temps 30Load temps 43 peak 464.4GHz on water (300l/h, 6x35 CFM)BCLK 142RAM 1704 MHz at 6-6-5-18-1TCPU Mult 31CPU Vcore 1.35625v (1.38v idle, 1.4v load)CPU VTT +250mv (1.44v)QPI PLL Vcore 1.325QPI 6.8GT/sIdle Temps 35Load temps 48 peak 514.54GHz on water (300 l/h, 6x35cfm and 500 l/h, 6x90cfm)BCLK 142RAM 1704 MHz 6-6-5-18-1TCPU Mult 32CPU Vcore 1.4875v (1.49 idle, 1.5 load)CPU VTT +325 mv (1.6v)QPI PLL Vcore 1.35vQPI 6.8GT/sIdle Temps 37Load temps 54 peak 56 (low cooling flow) 51 peak 53 (high flow)CheersBob ScottColonel, USAF (ret)ATP IMEL Gulfstream II-III-IV-VColorado Springs, CO

Now thats what I call a report.. thank you sir! :(