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Overclocking Intel i5 750

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February 27, 2010 3:35:03 AM

Intel Core i5 750 Chipset Intel P55 Motherboard 4GB DDR3 1333 500GB NVIDIA GeForce 9500 GT Graphics Interface PCI Express 2.0 x16 Windows 7 Home Premium 64-bit.

Hi guys i am a total newbie to this but i would love to learn how to overclock my system.

Where do i start...

More about : overclocking intel 750

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a b à CPUs
a b K Overclocking
February 27, 2010 8:42:50 AM

You can start by looking up your motherboard. If you read your motherboard's manual, I'm pretty sure there are instructions on how to set the CPU settings to "Manual" so that you can edit them directly. A quick Google search to find your motherboard, and another search for overclocking basics.

Personally, I have the i5-750 too. You just have to change BCLK frequency to get different clock speeds. The default BCLK is 133 MHz, and the i5 750's multiplier is 20. Multiply the two, and you get 2.66 GHz. The exact clock speed of a stock i5 750. Now if you change the BCLK to something like 160, then your clock speed would become 160x20=3.2 GHz. The steps to changing the BCLK frequency is different with each motherboard. If you want to take time fiddling around with your BIOS, I'm sure you will see the settings.
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February 27, 2010 12:26:19 PM

Good Stuff!
So overclocking the CPU makes it run hotter therefore an upgrade on the heatsink cooling fan is needed. Plus i will need software to read the Temperature and CPU speed. I don't want to start playing with settings until i get this far.

Any suggestions for fans and software.
Thanks.
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a b à CPUs
a b K Overclocking
February 27, 2010 12:34:23 PM

Fans and software are suggested in that guide already.....

Read section 4) Torture test
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February 27, 2010 4:18:39 PM

Thanks Andy! I was hoping for other suggestions to keep many options open.
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a b à CPUs
a b K Overclocking
February 27, 2010 4:46:05 PM

There might be some other options for fans, but most peoples here use the same monitor software as me.

FYI, People who treat:

1. quietness as most important would recommend: Noctua <-- very very expensive

2. performance as most important would recommend: Scythe 2000rpm fan

3.Cost-performance as most important would recommend: CoolerMaster Sickle Flow 2000rpm
(p.s. Under 18C ambient temperature, the 100% load core temperatures of my i5-750@3.6GHzare 48C-44C-44C-43C at 3.6GHz with Prolimatech Megashadow paired with 2x Sickle Flow.)
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a c 203 à CPUs
a c 148 K Overclocking
a b å Intel
February 27, 2010 5:18:17 PM

Heat Sink - For performance and ease of installation, the Prolimatech Megahalems fits both criteria. Here's what I'm putting in new builds Mega w/ IC Diamond TIM and twin Scythe PWMfans (make sure ya MoBo can handle the fan wattage). (HS-$65, TIM - $7, two PWM fans $11 each and a Y cable splitter - $7)

http://www.frozencpu.com/products/8807/cpu-pro-01/Proli...
http://www.frozencpu.com/products/7038/thr-41/Innovatio...
http://www.frozencpu.com/products/10026/fan-639/Scythe_...
http://www.frozencpu.com/products/8418/cab-150/FrozenCP...

If that's a budget breaker, look at the Xigmnatec S1283 or one of the others here:
http://www.silentpcreview.com/Recommended_Heatsinks
http://www.frostytech.com/top5heatsinks.cfm#INTELHEATSI...
http://benchmarkreviews.com/index.php?option=com_conten...

pick a TIM from the top few here:
http://www.hwreviewlabs.com/index.php?option=com_conten...
http://www.xbitlabs.com/articles/coolers/display/therma...
http://benchmarkreviews.com/index.php?option=com_conten...
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a c 203 à CPUs
a c 148 K Overclocking
a b å Intel
February 27, 2010 5:44:03 PM

You don't say what speed your RAM is but I will assume 1600 MHz. First step is to make sure your RAM is not holding you back. This is a very basic procedure....read various OC guides to get an understanding of what you are doing.

1. Download Memtest+ from www.memtest.org and put on a CD / DVD.
2. Enter your BIOS, w/ all settings at default, go into memory section and set CAS timings manually. Leave all voltages on Auto for time being. Save and exit.
3. Re-enter and back up BIOS if your MoBo has capability.
4. Set BIOS tweaker or what ever your BIOS call it to manual (from auto) so as to allow you to change settings.
5. Set CPU multiplier to 12 (133 x 12 = 1.6 Ghz). This is to make sure that as system BCLK is increased any CPU issues are eliminated because CPU is running well below rated speed.
6. Assuming you have DDR 1600, set memory multiplier to 12 (12 x 133 = 1600 MHz), Use 10 if you have DDR3-1333, 8 if you have DDR3-1066.
7. Save and exit. Reboot with memtest CD and run for 12 hours. If it passes w/ no errors, you have proved that memory can run at rated speed. If it doesn't, RMA the memory.
8. Assuming you have:
- DDR 1600, set BCLK to 160, memory multiplier to 10 (10 x 160 = 1600 MHz),
- DDR 1333, set BCLK to 167, memory multiplier to 8 (8 x 167 = 1333 MHz),
9. Save and exit. Reboot with memtest CD and run for 12 hours. If it passes w/ no errors, you have proved that memory and system can run at those clocks .
10. Enter BIOS, set CPU multiplier back to Auto from 12. At 160 BCLK your CPU speed will hit 3.2 Ghz (3.33 w/ turbo) and 3.4 (3.53 w/ turbo) w/ 167
11. Run 20 passes of Linx to see if its stable (5 minutes) monitor temps with coretemp or realtemp, system status w/ CPU-Z ...if not back off BCLK, if so...
12. Run OCCT CPU test for 60 minutes, if fails, back off BCLK, if passes....
13. Run P95 (blend) overnight.

You can skip 13, till you "hit a wall" .... keep increasing BCLK (start w/ increments of 3 and drop back to 1 when you fail) till you get a failure. Always check that memory multiplier is set such that BCLK x multiplier = < your RAM rating. If you fail, try increasing voltages. Max CPU voltage I would go with is 1.35 ... max DRAM voltage is 1.64xx (whatever it is to not go over 1.65000)

If temps are high, lower CPU voltage....I have a 3.7 Ghz "everyday" OC profile running at 1.125 core voltage and 1.546 DRAM voltage....keeps temps in the low 50's for long life.

read this for a good education on OC'ing Asus Boards

http://vip.asus.com/forum/view.aspx?SLanguage=en-us&id=...
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February 27, 2010 7:07:22 PM

What is your motherboard?
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February 27, 2010 9:53:18 PM

So you will have a Gigabyte P55M-UD2. Ask about overclocking on this motherboard.
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February 27, 2010 10:43:46 PM

Thanks Evillman, i was unaware that motherboards could be overclocked.
What benefit does that have?
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a c 203 à CPUs
a c 148 K Overclocking
a b å Intel
March 1, 2010 1:29:47 AM

88GT said:
Thanks Evillman, i was unaware that motherboards could be overclocked.
What benefit does that have?


The Motherboard controls all the equipment on the board. You overclock the CPU and memory by changing settings in the MoBo BIOS. Different manufacturers and even different models among manufacturers use different BIOS's. Terms and details will therefore vary so using a guide for one MoBo's BIOS would be confusing trying to use on another.....like trying to use a Chevy repair manual on a Dodge :) 
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March 3, 2010 10:00:57 PM

Thanks Jack, that makes sense. How would i word my search for help overclocking my i5 750 with the Gigabyte P55M-UD2 mobo.
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a c 203 à CPUs
a c 148 K Overclocking
a b å Intel
March 4, 2010 10:04:55 PM

88GT said:
Thanks Jack, that makes sense. How would i word my search for help overclocking my i5 750 with the Gigabyte P55M-UD2 mobo.


"i5 750 Giagabyte P55M-UD2 overclock" :) 

Drop the "-UD2" if ya don't get many hits
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March 5, 2010 3:21:35 AM

Thank You!
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March 15, 2010 9:20:58 AM

Best answer selected by 88GT.
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