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Core I7 920

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  • Overclocking
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May 26, 2010 10:19:59 PM

Hello,
I'm new at overclocking. What is the easiest way to overclock my computer to at least 3.0-3.2ghz? Can I use the Turbo V? Or my best bet is to go into the bios? Also what else is required? Someone mentioned on a google search that Prime95 is required.

Thanks

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More about : core 920

a b K Overclocking
May 26, 2010 11:23:45 PM

Go into BIOS and increase your base clock to 150 MHz.
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May 26, 2010 11:34:06 PM

He pretty much said it right there-- Go into your BIOS and change the BCLK to a higher number.

What to keep in mind is your CPU Ratio/Multiplier. If you are using a multiplier/ratio of 21, then you just do (MHz)/21 = BCLK..

For example:

3000 MHz/21= ~143 BCLK

3200/21= ~152-153 BCLK

When you change your BCLK to these numbers--remember, I am going according to a 21x ratio. If you use 20, then just do 3000 MHz/20 or 3200 MHz/20 and you will get the BCLK for that CPU ratio...get it?

One more thing--make sure that you are changing your RAM accordingly. When you increase the BCLK you will notice the RAM go higher. Keep it as close to stock as possible so that you can make sure the PC is stable when OCing the processor :) 

Hope this was helpful!
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a b K Overclocking
May 27, 2010 1:13:21 AM

trancetunes said:
He pretty much said it right there-- Go into your BIOS and change the BCLK to a higher number.

What to keep in mind is your CPU Ratio/Multiplier. If you are using a multiplier/ratio of 21, then you just do (MHz)/21 = BCLK..

For example:

3000 MHz/21= ~143 BCLK

3200/21= ~152-153 BCLK

When you change your BCLK to these numbers--remember, I am going according to a 21x ratio. If you use 20, then just do 3000 MHz/20 or 3200 MHz/20 and you will get the BCLK for that CPU ratio...get it?

One more thing--make sure that you are changing your RAM accordingly. When you increase the BCLK you will notice the RAM go higher. Keep it as close to stock as possible so that you can make sure the PC is stable when OCing the processor :) 

Hope this was helpful!
150 gets him to 3.0 GHz at the base speed (20x multiplier) and 3.15 GHz using the 21x Turbo multiplier. At that speed he shouldn't need to do anything with voltage, allowing him to use default power savings with full Turbo capability.
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May 28, 2010 6:55:30 AM

I'm currently stable with 3507 MHz (167 x 21) using 1.15 volts on CPU (I also have HT and Turbo enabled still)..
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a b K Overclocking
May 28, 2010 8:29:58 AM

trancetunes said:
I'm currently stable with 3507 MHz (167 x 21) using 1.15 volts on CPU (I also have HT and Turbo enabled still)..
right...I don't think he wants to go that fast.
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May 29, 2010 2:33:25 PM

trancetunes said:
He pretty much said it right there-- Go into your BIOS and change the BCLK to a higher number.

What to keep in mind is your CPU Ratio/Multiplier. If you are using a multiplier/ratio of 21, then you just do (MHz)/21 = BCLK..

For example:

3000 MHz/21= ~143 BCLK

3200/21= ~152-153 BCLK

When you change your BCLK to these numbers--remember, I am going according to a 21x ratio. If you use 20, then just do 3000 MHz/20 or 3200 MHz/20 and you will get the BCLK for that CPU ratio...get it?

One more thing--make sure that you are changing your RAM accordingly. When you increase the BCLK you will notice the RAM go higher. Keep it as close to stock as possible so that you can make sure the PC is stable when OCing the processor :) 

Hope this was helpful!


Thanks all of your response. But do I need to add a Thermalright Ultra-120 eXtreme-1366 RT or another heatsink with my settings at 3.0? Or can I go with my factory heatsink?
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a b K Overclocking
May 29, 2010 5:54:27 PM

herc76 said:
Thanks all of your response. But do I need to add a Thermalright Ultra-120 eXtreme-1366 RT or another heatsink with my settings at 3.0? Or can I go with my factory heatsink?

Small overclocks don't require a large heatsink.
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May 29, 2010 8:48:38 PM

So should be fine with what I have? Ok I will try to overclock my computer to 3.0Ghz. I will let you all know how everything goes.

Thanks
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May 29, 2010 9:04:31 PM

As long as your temps and voltages are at the same point they are stock, then you won't need an aftermarket cooling solution. :) 

Right now I am at 3990 MHz at 50 C with stock heatsink+fan. :)  The only voltages I have had to increase from stock levels are CPU PLL to 1.88 , and VTT to 1.41 (standard CPU PLL is 1.86 I believe, and standard VTT is 1.34 I think).

Some people have way lower temps from aftermarket heatsinks and fans, and that doesn't hurt at all..Lower temps = better. However, 50 C is still safe from all the asking/research I have done on these forums and other sites.. Just try to keep your temps at the same point that they are, and try to keep voltages close stock levels. Too many volts=high risk of damage, too much temperature=high risk of damage. (NOTE: Sometimes high voltage doesn't increase temp, but it can still kill the CPU).
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May 29, 2010 9:07:18 PM

Crashman said:
Small overclocks don't require a large heatsink.

How can you determine what the multiplier is? Im in the bios right and I see cpu ratio settings and it set to auto. But I'm seeing anything else that shows the multiplier. I already set the BCLK at 150 but I just want to make sure. To make sure I'm in the right area. I select manual in the AI overclock tuner right? Or do I need to go into X.M.P.?
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a b K Overclocking
May 29, 2010 9:58:46 PM

herc76 said:
How can you determine what the multiplier is? Im in the bios right and I see cpu ratio settings and it set to auto. But I'm seeing anything else that shows the multiplier. I already set the BCLK at 150 but I just want to make sure. To make sure I'm in the right area. I select manual in the AI overclock tuner right? Or do I need to go into X.M.P.?
You don't need to change multiplier because it's automatically managed by Intel Turbo Boost and EIST. It will go down when your CPU is under light load and go up when your CPU is under heavy load, saving you heat and energy.

You have your BCLK set to 150 MHz, it will always be 12.5% faster than it was at stock speed.
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May 29, 2010 10:02:17 PM

CPU ratio is the same CPU multiplier..instead of setting it to auto select 20. Then, BCLK to 150 is what you want because 150x20=3000 MHz...

For the RAM, there is no specific option by itself to pick the multiplier.. What you have to do is manually pick a DRAM frequency and then to find out what multiplier it is using you can do (RAM FREQ)/(BCLK)=(RAM multiplier)

EXAMPLE: Say I set the CPU ratio to 20, then BCLK to 150. Now I don't know what exactly the RAM is going to be so for this example I will make up a number..Let's just say the RAM frequency is at 1200 for this example. If my RAM is at 1200, and my BCLK is 150, that means I am using a RAM multiplier of 1200/150 which is = 8. If the RAM is at 1500 then the RAM multiplier is 1500/150 which=10. If the RAM is at 1800 then we do 1800/150 which=12. Got it? :) 

Once you figure out which RAM multiplier you are on, you can look at the list of DRAM frequency available to see which one will use a multiplier of 8, 10, 12, 14, and so on..EXAMPLE: Say we are at 1800 RAM with BCLK of 150 and CPU ratio of 20..okay? You now know that the RAM ratio is 12 for that option.. So now when you go into the available RAM frequencies (usually in a small list when you hit the ENTER key on the DRAM freq option), lets say 1800 is at the middle of that small list of option.. The option below 1800 will be RAM ratio of 14, but the option above 1800 will be RAM ratio of 10. It goes in increments of 2 :) 

Last but not least, this is what I recommend doing.. BCLK to 150, CPU ratio to 20, then go to DRAM Frequency and select the RAM closest to your stock speed without going over. So that would be 1200 if you have DDR3-1333 RAM, or it would be 1500 if you have DDR3-1600 RAM.

You will also have to manually set the DRAM TIMINGS. If your ram is rated for 7-7-7 or 8-8-8 timings, then I would set them to 8-8-8-24 with Command Rate 2 and see how things work out.


We probably don't have same exact BIOS but here is a visual of the things I described..
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May 29, 2010 10:08:54 PM

Crashman said:
You don't need to change multiplier because it's automatically managed by Intel Turbo Boost and EIST. It will go down when your CPU is under light load and go up when your CPU is under heavy load, saving you heat and energy.

You have your BCLK set to 150 MHz, it will always be 12.5% faster than it was at stock speed.


Thanks! So that is basically it? Not bad at all. So what can I used to test my performance? Also when I logged into Win7 it sill shows that I'm still at 2.66.
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a b K Overclocking
May 29, 2010 10:36:43 PM

herc76 said:
Thanks! So that is basically it? Not bad at all. So what can I used to test my performance? Also when I logged into Win7 it sill shows that I'm still at 2.66.
I'm not certain that Windows 7 shows actual speed, try CPU-Z from www.cpuid.com It should show that your base clock is 150 MHz.

You don't need to do anything else for such a minor overclock. CPU-Z will probably show your CPU running a lower multiplier at low CPU load, you can verify that it increases to 21x automatically by running a CPU load program such as Prime95.
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May 29, 2010 10:52:45 PM

Crashman said:
I'm not certain that Windows 7 shows actual speed, try CPU-Z from www.cpuid.com It should show that your base clock is 150 MHz.

You don't need to do anything else for such a minor overclock. CPU-Z will probably show your CPU running a lower multiplier at low CPU load, you can verify that it increases to 21x automatically by running a CPU load program such as Prime95.

According to CPU-Z the multiplier is 21, core speed at 2806.3MHz and Bus speed at 133.6MHz.
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a b K Overclocking
May 30, 2010 12:19:32 AM

herc76 said:
According to CPU-Z the multiplier is 21, core speed at 2806.3MHz and Bus speed at 133.6MHz.
And where did you set the bclk to 150MHz at?
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May 30, 2010 12:24:39 AM

Crashman said:
And where did you set the bclk to 150MHz at?

I know what I did. I canceled my changes when I initially changed it to 150. Anyway now CPU-Z shows the core speed at 3150.0, 21x, 150.MHz bus speed
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Best solution

a b K Overclocking
May 30, 2010 1:41:13 AM

herc76 said:
I know what I did. I canceled my changes when I initially changed it to 150. Anyway now CPU-Z shows the core speed at 3150.0, 21x, 150.MHz bus speed
I'm glad I could help. I think things like Turbo Boost and EIST are worth keeping when they work, and I was fairly certain they'd work at the speeds you sought.
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May 30, 2010 5:31:19 PM

Best answer selected by herc76.
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May 30, 2010 5:31:55 PM

Thanks for all your help.
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