Thanks guys! Looks like +0.02v is it.

Ok, after much research and messing around I have finally reached a nice overclock wiht my ASRock board and my 2500K. If I try to go any higher to 5.0 the computer will not start up. So far my Prime95 Blend tests show temperatures topping out at 76C and the volts nice and low at 1.32 max. I am a little worried about the short duration power limit Watts at 225 but this is what you need to do on the board to get the manual OC to work. I would be interested in any comments on this aspect of my OC. I will probably leave things at this level for now but I would be interested in pushing to the max just to see what can be done. If anyone has a suggestion or two on the next steps, please let me know.Now the only problem I have is that my framerates in FSX suck. I am getting 15fps at EGLL and ConcordeX, tuned using NickN Windows and FSX guides, using Bejote's cfg program and frame rate limiter at 30. Need to keep working on this. Only other problem is I have zero sound from the speakers and not sure why, USB headset sound is OK.Mark.

Mark,your vcore is ridiculously low for 4.9GHz. You either got a really good chip or CPU-Z is reporting your vcore incorrectly. I would verify it with another program, perhaps with a monitoring utility that came with your motherboard.

OK, will do. I basically copied the settings from someone else on the ASRock thread at xtremesystems. He had similar results. By the way I just finished running prime95 for an hour and the system was fine. My temps after an hour are below, they are a bit high but I am not overly concerned because FSX will run cooler.Here is cpu-z and the ASRock AXTU utility side by side with prime95 running.Mark.

Well some more good news, figured out my sound problem, just needed to update the Realtek drivers.Also my framerate problem is fixed, caused 100% by the frame rate limiter program. Sim looks really good, I have it locked at 30.And finally, I decided to OC my video card just a little bit, I know it will not do much for FSX but I purchased the ASUS GTX560Ti at stock speed of 850 and I know ASUS sells the same card overclocked at 900 and 925. I ended up trying both and they worked, keeping the 900 setting.Mark.

Hey Mark. I was just reading our irt comment on yougetting 15 fps. Since u locked it at 30 that sounds like you are using 2 monitors. If so just lock the limiter at 60 fps and you will get your 30 fps.

Thanks, actually just fixed that and now all is good.

Mark,your vcore is ridiculously low for 4.9GHz. You either got a really good chip or CPU-Z is reporting your vcore incorrectly. I would verify it with another program, perhaps with a monitoring utility that came with your motherboard.

Just doubled checked on the xtremesystems forums and a bunch of guys have the same or similar results. I wonder if the ASRock Z68 board is giving false readings or if this is just the way it is with the board/bios. They just upgraded the bios and several people reported better clock speeds without changing any other factor.Mark.

I hope that's true and if it is then I hope other mobo manufactures catch on soon. In the meantime I would be checking the voltage with a digital multimeter to make sure I wasn't inadvertently juicing my chip! I'll have to go take a look at the xtremesystems forum and see if there's some sort of explanation. Surely someone else has already confirmed the voltage with a DMM if this is true.

I am thinking that the reason is the adjustment of the watts to the chip that is changed in the bios. I would be interested in what you find out.

How much voltage with the CPU idle and SpeedStep enabled please Mark?

Here you go, Idle with Speedstep enabled.So I think what is going on here is that the power is just being supplied in a different way. Watts = Volts * AmpsI have increased the Watts to 225 (although I am going to lower this value).If the volts are 1.32 then the amps have to be 170 although I am not exactly sure what the watts actually are because I cannot measure them. Obviously 170amps is the wrong scale as my house only has 100 amp service and I am rather sure its not all going into my CPU so it is probably 1.7.Mark.

Just to finish this off, I have been working on reducing the power limits and have the following results.Short Duration Power limit (W) - Reduced to 125 (from 225).Long Duration Power limit (W) - Reduced to 130 (from 225).Core Current Limit (W) - Reduced to 130 (from 250).At these settings I am able to maintain steady overclock of 49 when running Prime95. Any lower on any of these values and the overclock starts to step down to 48, 47 or 46. Now back to the Volts and amps. I calculate that at the stock speed and power limit of 95 Watts short, 118 Watts long that the amps drawn at 1.32 volts (my normal overclock vCore) are 71 and 89 amps. At my settings above where I get stable overclock the amps increase to 94 and 98amps at the maximum short and long power limit. I have no idea if this is good or bad with an increase of 32 & 10 percent over stock. I am hoping so.Mark.

Great idea Stephen! My 4.8 w/1850 BIOS (improves stability). This setup has not failed me and stable with Prime95 and ASUS Stress Tests. Very stable with FSX too and no CTD's and I get great FPS (above 20 most of the time but never in the single digits and very smooth)(FPS locked at 34) in FSX w/ASE, FEX, several commercial aircraft addons, MyTrafficX, MegaScenery running. I also have FTX/Orbx scenery too when FEX is not running.Best regards,Jim

Here's my current BIOS settings now that I'm 99% sure I eliminated the idle BSOD issue I was experiencing a few weeks ago. In addition to being idle stable, these settings survived 8 hours of Prime95 blend. Offset voltage of +0.04v and LLC set to ultra high yield 1.40v on the dot at full load. Idle voltage is approximately 1.03 +/- 0.05v.

Here's my current BIOS settings now that I'm 99% sure I eliminated the idle BSOD issue I was experiencing a few weeks ago. In addition to being idle stable, these settings survived 8 hours of Prime95 blend. Offset voltage of +0.04v and LLC set to ultra high yield 1.40v on the dot at full load. Idle voltage is approximately 1.03 +/- 0.05v.

Corey, that 1t command mode, is that an overclock? Or is it in the specs? What does the XMP reading say in the UEFI? Have you tried it?Sorry for the questions...I have been trying to get a set of DDR3 at 1866 to run at 1T without success. Tried Ripjaws and Vengeance types: no joy.1T at 1866 or 2133 would pass the Tests: Aida64 stability tests and Memtest420 "most" of the time but would fail one way or the other in FSX.I initially thought my FSX installation was the problem, then it was the Win7, then the BIOS, etc....Until I reverted to 2T with the Vengeance (in the sig). I actually overlooked the XMP profile at first which gave me a 2T command for that memory. Rock solid for the past 4 days in FSX and Win7.There you go, that is why I'm asking.Pierre