OCD007

Hi
I am new here and have just got an i7 920 which i have done a simple OC on.
20x150 3ghz
I have a P6T MB and only changed these 2 settings in BIOS, all the rest are set to auto.
CPU Ratio 20
BCLK Frequency 150

I have been running prime 95 torture test for about 1 hour now CPU temp 76 c.

I would like to OC it to 3.2 - 3.4 but when i increase BCLK Frequency 160 - 170
windows will not start

I would like some help on other settings, I have 1600 mhz mem

Thanks

Juggalo23451

This is might help http://www.overclock.net/intel-cpus/...ng-thread.html

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Jakethesnake011

Hey I hope this helps, wrote this some time ago for a member here.
No I think you can get to 3.8 with turbo and Ht on.
Okay for overclocking though turn turbo off it makes things harder when trying to push the CPU, so turn it off and then find a good base clock, say 180 then turn turbo on and it will boost that 180 up even more. Do not leave voltages on auto since the BIOS does not always do the best job setting them.
Most likely you can not get into windows due to you QPI voltage which is the QPI link, this has to be higher than default if you want to overclock in the 3.5 range or higher. Now the max QPI voltage is 1.35V, which is about +0.24, but do not push it I would only max out at +0.18V IF you need it.
Turn off speed step please, turn of spread spectrum, turn off Overspeed protection, turn off C1/C0, turn of EISt (turbo), now you CPU PLL has a max of 1.88V (+0.08V), which is in Intel's spec, it helps me increasing this to 1.88V to get a stable 3.9 overclock. Now leave PCI frequency alone,since that deals with your graphics cards and other devices.
Okay so your voltage is high enough to get at least a 3.6 overclock I would say, but that might be voltage with turbo on, since turbo mode pumps more voltage into the chip even if you tell it not to, say you set CPU voltage to +0.15V, which would end up being 1.342V, without Turbo, but with Turbo on the voltage would really be around 1.38V, it kicks in some volts to help that extra multiplier.
okay leave HT on, it will produce more heat but it helps a little more then without it.
Now with your cooler it should keep the i7 with in the 70-80 degree centigrade range, mine runs at 77 max on a core when stressing. Also use a program called Linx, here is the link: http://www.xtremesystems.org/forums/...d.php?t=201670 Please use it since it works so much better than Prime 95, it can tell if system is unstable with in 5 to 15 minutes and it generates more heat for CPU, so you can see how hot it really gets. Also stress with the max memory hit the "All" button and use all the memory you have to stress CPU, since Linx stresses both CPU and RAM at same time and it will kick you into a blue screen if system is unstable. now if system is close to stable, (passes Linx with 20 tests, using a problem size of about 20,000 (I use 25,000 due to having 6 gigs of RAM yours might be less) now with it passing then let it run for about 3 hours to see if system is rock hard stable. Then use Memtest +86 2.11 here is link:http://www.pcgameshardware.com/aid,6...test/Download/ Now burn the ISO to a cd, then restart system with it in Cd drive and it will run, let it run 2 full tests, it will test your RAM to see if that is stable, and then you are in the clear. Now use RealTemp for temps. http://www.techpowerup.com/realtemp/ Also Core temp : http://www.alcpu.com/CoreTemp/ Now use CPU-z to read info from CPU: http://www.cpuid.com/.
Okay back to voltages, and base clock turn base clock say up to 180, since you want a 3.6 overclock (with turbo on it will give about 3.8 overclock), then set voltages higher, something like CPU, +0.120, QPI +0.13, PLL +0.04 (making 1.84), Now pull RAM back down to 1.64V, since Core i7 and the RAM voltage of 1.66 are not good at all, so go 1.64V for RAM. Then leave IOH voltage alone, not auto for +0.00V. Best to have your QPI link set to 4.8 Gt/s. Okay with setting those voltages high, save and exit and see if windows will boot up, and if it does great run Linx with Coretmep and Realtemp going to monitor temps and watch to see if they jump past 80 if so I would back off your overclock, or it might be from higher voltages. Then if those voltage work for about 45 minutes with Linx, restart computer go into BIOS and then cut 0.01V on CPU voltage and 0.01 on QPI ( leave QPI +0.01V higher than CPU voltage). Now if those votlages do not let you boot into windows then jump them up 0.01 volts until you get in. It is a time consuming thing man be patient and test each setting with Linx and record temp, maybe write in notebook your Base clock and voltages so you can see what you did and what did not work. Also it is best best to leave memory multiplier at 4, or 8, in this case leave it at 4, since it works best in those multipliers, and then have your Uncore multiplier twice the memory multiplier, so 4 memory and 8 uncore. Turn off all power saving things on the CPU, since it will kill your overclock and not give CPU enough power, or cut power when it needs it. Make sure your fans are in push/pull config, works best with these cpus. Then if you get something that is rock stable turn on turbo and see how it is and if it boots and then run Linx with turbo and it is stable keep it on. Ummm, what else, can I think of...nothing right now, but come back and let me know how you did.

I also have some other links for yah. It gonna need a lot of reading, but read before you do anything.
http://www.overclock.net/intel-cpus/...hread-137.html
http://www.bit-tech.net/hardware/cpu...-core-i7-920/1
http://www.xbitlabs.com/articles/cpu...ocking_11.html

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OCD007

Thanks for your help

I have managed to get 3.4 ghz (20x170)
Prime95 torture test 83 C
3Dmark06 17768

but only when i lower the memory to 1020 mhz 6-6-6-18 1T
it dont seem to like going over 1200 mhz.


I still have problems when only trying to OC the memory with the pre set XMP settings which my ram should support

I am very new to this, so does this sound normal or do i have duff ram?
also, does that 3Dmark score look good or bad

Thanks again for your help.

Jakethesnake011

The 3d mark score looks well, mine is 22136ish but the graphics has a high impact on the score, now my CPU score is:6576, now that is good for the i7. Tell me what your CPU score was, since the graphics will pull it up or down in the total. Now with the Ram, what is your RAM's default voltage? Should say it on the package or from the website. My default voltages are 1.5V to 1.6V, now I have my RAM running at 1.6V in order to support a 742Mhz clock on each stick, making it a 1480 clock, now my RAM is made for 1333Mhz speed, so 666 MHz a stick, I have a mild overclock on my RAM. But you want to make sure your RAM to Uncore ratio is correct. You want the Memory mulitplier to be 4 and the Uncore to be 8, for now to start. Always keep the Uncore at LEAST 2 times higher than the RAM multiplier. So with your 175 base clock, you should be getting a RAM speed of 700Mhz, so 1400 across the 2 sticks, which is not bad for now. I would try to keep the Memory mulitplier at 4, since when you go higher into the 5,6,7 things might not work the best, or put the memory multiplier to 8, but then the RAM would be running at 1400MHz a stick, which is a crazy 2800MHz for the 2 of them,, no 1333 RAM or even 1600MHz default speed RAM can take that at all. So try to keep it at 4:8 Memory:Uncore. Now you might need to increase your RAM voltage, which would be the DRAM voltage, say if your RAM can run at 1.6V, put it at 1.6V, which will help stabilize the RAM speed. Now to test your RAM use the Memtest+ 86 version from the link above and run about 2 or 3 full tests to declare the RAm speed stable. Now it is most likely not your RAM which is ****ing you over, it could be your QPI link and QPI voltage, now this is very important when overclocking the i7. Now the default QPi voltage is 1.12V, I believe double check me, and the max is 1.35V. Now when you get into the higher clock speeds, the QPI link will run faster so you have to increase both the QPI and CPU voltage, try to keep the QPI about +0.01V over the CPU, until you reach +.180V, when I would not go much higher.

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Jakethesnake011

Also your RAM timing seem very very tight, you might want to loosen them up when you are running them faster, say like 8-8-8-21 with faster speeds. I do not know what they are rated for.

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laxrunner

Don't use XMP settings, they might do things you don't want happening. Just manually set everything, leaving things on auto means the mobo can change them whenever it feels like it and can cause instability. If your ram is spec'd at cl9, as stated in your sig, put the timings at 9-9-9-24 or so and 1.65V. You should then be able to run a higher ram multi and have better performance. Also make sure your QPI voltage is set above 1.15V or bad things can happen. The best way to learn is to just keep trying different things and ask questions when you run into problems. Also you may want to get a slightly better cooler for your CPU, 83C is very hot.