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I5 3800 OC attempt

Last response: in Overclocking
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February 22, 2010 6:18:39 AM

Hey everyone!

Thanks for the those that responded to my Turbo question in the other thread!

So due to supporting an overnight outtage (PBX/Telecomm engineer) I have had a lot of free time and done some reading which has gotten me to the point that i think I have an idea on how to get to a solid 3600/3800 OC of my i5 750.

SPECS
1. CPU: i5 750
2. CPU COOLING: CoolerMaster Hyper 212 Plus
- (single fan not push/pull)
3. MB: ASUS P7P55D PRO
- (flashed to latest BIOS)
4. RAM: Corsair XMS3 4 GB ( 2 x 2 GB )1600 MHz ( PC3-12800 )
- heat spreaders
- 9-9-9-24
5. PSU: Corsair CMPSU-750TX Power Supply
6. CASE: NZXT Tempest EVO
- all 6 fans active, surprisingly quiet!
- 2 front 120mm fans are in intake
- 1 side 120mm fan intake
- 2 top 140 mm fans are exhaust
- 1 rear 120 mm fan exaust

7. VIDEO CARD: XFX Radeon 5850

PRE-OC TEMPS
Using Realtemp my 4 cores are in the mid/high 20s idle and around 40 at load.

OC GOAL
I am looking to get to a stable 3600 or 3800 with TURBO for now..THat should be more then good enough for this first time at doing it..

PLAN
Almost every guide/thread I looked at said the best way to do it is directly in the bios as opposed to software so this is my plan.

1. Reset BIOS to default
2. Leave CPU Multiplier at 20
3. Change BLCK to 180 for 3600 or 190 for 3800
4. Change RAM Speed to 1600
5. Leave Turbo enabled.

QUESTIONS OR SUGGESTIONS
1. I realize that their is a lot more that really goes into an OC then changing 1 or 2 settings but from everything I have read..this is the simplest way to do it. Does anyone see any issues with the 5 steps above?

Thanks in advance!

More about : 3800 attempt

a b K Overclocking
February 22, 2010 6:22:31 AM

The main issue with the steps above is that your temps and voltages will go way higher than they need to if you leave the vcore on auto. You will want to set this manually.
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February 22, 2010 9:28:19 AM

Ok..

So I guess Im gonna note what stock voltage is then go in small increments from there until I can get stable?
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February 22, 2010 2:13:43 PM

Maybe 1.38 on the voltage?

Most experienced overclockers (I'm NOT placing myself in that group) say that you're best off avoiding Turbo Boost if you're going to OC your CPU. An i5 with TB running at 3.6/3.8 is gonna be getting to some pretty high clocks... and that's gonna require voltage and that voltage is gonna generate heat. If it were me I'd try to get 3.6 or 3.8 stable without TB before dragging that variable into the equation.
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a b K Overclocking
February 23, 2010 7:05:22 AM

My Settings are:

3.6GHz: (24hrs Small FFTs test, 30hrs-2mins Large FFTs test and 14hrs-12mins Memtest86+ stable!)
Load-Line Calibration: Enabled (or Level2 for Gigabyte GA-P55A-UD5)
Vcore= 1.21875V
QPI/Vtt/IMC= 1.14V
PCH= 1.10V
PLL= 1.80V
RAM= Specified voltage for your RAM
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February 23, 2010 1:44:49 PM

I'm just gonna copy and paste Andy's settings and email that stuff home! My i5-750 ain't no where close to running like that on that level of voltage. What are your idle temps running at 1.22 volts? Maybe I got numbers mixed up in my head... I'm either at 1.28 or 1.38... man, now I want to go home just to check out my settings.
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a b K Overclocking
February 23, 2010 4:13:08 PM

rodney_ws said:
I'm just gonna copy and paste Andy's settings and email that stuff home! My i5-750 ain't no where close to running like that on that level of voltage. What are your idle temps running at 1.22 volts? Maybe I got numbers mixed up in my head... I'm either at 1.28 or 1.38... man, now I want to go home just to check out my settings.

My idle temps are 27C-24C-26C-23C under ambient of 17C.

Cooler: Prolimatech Megashadow
CPU fan: 2x 2000rpm+/-10% CoolerMaster fan
Case: HAF922
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February 23, 2010 4:58:50 PM

The more I think about it, the more I think I'm at 1.28... but still... that's way north of your ~1.22 volts. I have a decent (CoolerMaster Hyper N520) CPU cooler and a case with adequate airflow (CoolerMaster Scout) Quality PSU (Corsair 650HX) and an top-notch mobo (Asus Maximus III Gene) so I'm not really sure why I'm sitting at 1.28 and you're all the way down there at 1.22. I guess I just didn't bother investigating once I got everything stable at 3.6.
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February 24, 2010 2:16:53 PM

Thanks for all the great info!

Ran at 3.6 for about 4 hours last night during a heavy gaming session with no issues.. Idle temps were 27-39 on cores 1 and 3 and 30-32 on 2 and 4 (if i remember right) Didnt get much above 45 at load.
Going to aim for 3.8 tomorrow!

This really has been a useful learning epxerience to me so thanks Overshocked, Andy and Rodney for the advice!
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!