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My i5 760 Overclocking adventure!?

post #1 of 13
Thread Starter 
Hi guys, I get directed to this forum all the time when in search for overclocking help, so I thought it was about time to sign up here and share my overclocking for views and help.

My previous system was a E6550 which I had overclocked to 3Ghz. So I'm not new to overclocking but I'm certainly no expert!

I am stuck in two minds with what to do next with my system but before I get in to that, here are the details...

My current system which I bought in August 2010 is:
i5 760
Gigabyte GA-P55A-UD3
G.Skill 4GB (2x2GB) kit, PC-12800 (1600Mhz), 6-8-6-24-2N
Corsair CMPSU-650HX 650W ATX Modular PSU
Gainward GTX 460 GS-GLH
1TB Western Digital Black Caviar
Antec 300 Case
2xScythe S-FLEX 120mm Fan 1200RPM (Front of case)
Xigmatek Dark Knight Revision 3 CPU Heatsink & Cooler





I bought this to be able to run games at 1680x1050 on high detail. I currently only play BC2 but with games like Crysis 2, Dues Ex & BF3 on the horizon I needed a good quality and reasonably affordable PC to do this.

It did not take me long for the overclocking bug to bite, so off I went in search of higher clock speeds and fast memory timings. (As at stock the memory only runs at 1333Mhz and CL9)

I wanted it to still run at low clock speeds during windows but wind up to super speeds when all 4 cores are loaded. So I left the power saving options on and turned OFF Turbo.

My current stable overclock (after quite a few lock ups and BSOD's) is:
160x9 = 1440Mhz @ 0.864V at idle &
160x21 = 3360Mhz @ 1.088V at load.
Memory @ 1600Mhz (160x10 SDP) 6-8-6-24-2N

I am fairly happy with this, my temps don't go any higher than ~50C. Even when I run Intel Burn Test for hours (OCCT Version).

Here are the BIOS settings with this current overclock: (Does everything look ok??)

http://s140.photobucket.com/albums/r.../Overclocking/

Here is a picture of the voltages and temps under load and idle:



This setup runs stable in windows, BC2 & OCCT (both OCCT test and Intel Burn Test)

Is there any other programs I should run to test the stability? Prime95? LinX?

I do get one slight occurring thing happen with my CPU Fan that is a little worrying, every now and then during Windows use (no load), the CPU fan spins up to ~2000rpm for about 3 seconds then goes back to around 1500rpm. My temps don't go up nor does my voltages. Should this be a concern?

My other question and I guess the BIG ONE, is what to do next? Should I aim to get it stable with TURBO on? (I have had a couple BSOD's when I have tried to this in the past). Or should I aim to increase the BCLK and leave turbo off?

Any other thoughts would be greatly appreciated.

Thanks
post #2 of 13
The reason your fan is speeding up is because it is hitting a certain temp and being triggered to speed up.The setting must be low.
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OCZ VERTEX 2 50GB SSD/WD 500GB Blue/WD640GB Black Samsung DVD/RW Corsair H-50 Windows 10 home 64 Bit Retail 
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ASUS 24"1080P LED Asus VE248H Abs M1 Cooler master silent pro 600 modular M600 RS-60... Lian Li Lancool PCK-58 
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Steelseries Kinzu no 
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post #3 of 13
You can adjust your fan speeds in your bios under the hardware healt menu, assuming its a pwm fan hooked up to the cpu header.

also, you said your memory at stock is 9-9-9-24 at 1333, but you have it overclocked to 1600mhz 6-8-6-24. This is almost garunteed to cause stability problems while overclocking. i would turn your timings down. infact generally when overclocking ram you have to loosen the timings to maintain stability.

also i would keep turbo diabled.

as for your next step, id increase the bclk in small increments until you lose stability then increase your core voltage and vtt as needed.

remember when you are overclocking your cpu, keep your memory @ stock speed and timings or less. this way it can be eliminated as the cause of any instabilities. then once you get your cpu stable you can continue to overclock the ram.

I would also download a copy of prime95 and use that to test stability. generally anything that passes 12+ hours of prime95 blend is concidered stable.

Here are some stability pointers when running prime95: if a thread worker dies, increase your core voltage. if you get a blue screen increase your vtt/imc voltage. also dont forget to check prime95 every now and again because if you let it throw errors for too long you will bluescreen and this can easily be mistaken as a vtt/imc problem when its really a vcore problem.

good luck with your overclock. very nice build btw. if your interested in sli check newegg frequently because they have gtx460 on open box special all the time. could save you alot of money.
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c300, 2X WD CAVAIAR BLACK 640GB RAID 0 LG Bluray/Dvd Rewriter 7 Ult Gateway 24" lcd 1920x1200 
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post #4 of 13
Thread Starter 
Thanks Alice.

I'll have a look in the bios for the cpu fan stuff.

In regards to the memory, it is rated @ 6-8-6-24-2N 1600Mhz, so I am only running it at its rated speed and voltage. But yes, if I was to push my CPU more I would change the SPD down to 8 to eliminate any memory instability.

My vtt is currently set to AUTO, if I needed to increase this, how would I know what to set it to? As I don't know what it is set to at the moment?

Thanks I'll check out Prime95. In regards to increasing the core voltage, should I increase the Dynamic Vcore like I have at the moment or increase the CPU Vcore?

Cheers
post #5 of 13
Disable: EIST, TURBO and C1E in the BIOS to stop the (low idle clocks) like 1.4Ghz etc
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post #6 of 13
Thread Starter 
Quote:
Originally Posted by Mr OCN View Post
Disable: EIST, TURBO and C1E in the BIOS to stop the (low idle clocks) like 1.4Ghz etc
But I want it to be 1.4Ghz at idle mate! Why do we need super fast +3Ghz during windows use?!
post #7 of 13
Thread Starter 
Ok I have not had time to do so many Linpack passes, only 20, which returned no errors.

While I was at work today I left Prime95 running, here are the results



I have passed OCCT on High Data Set previously for over 8 hours too with out any errors.

So I would presume my system is all good. (Will let Prime95 run for over 12 hours in the next few days).

Should I be concerned about the random spinning up off the CPU fan every now and then in windows? I found a BIOS setting called CPU Smart Fan Mode which had either "AUTO", "PWM" and "Voltage"

I tried PWM and it still spins up to 2000rpm in windows, I then tried Voltage which makes the CPU fan only spin at ~600rpm on idle and ~1400rpm on load, which I thought was way too low (too risky).

Thoughts on this please?
post #8 of 13
Unless you want it to run at high speed constant I would leave the fan speed alone... By settng it low you will have high temps when it pushes the 21x multi and increases volts. If you disable it then the fan will spin at 100% all the time...
Get a quiet fan. Yate Loon Low Speeds are nearly silent. And only cost about $7...


As far as everything else it looks good.... If thats the setting you like just go with it

Welcome to OCN, and let us know when you want to take the training wheels off and get that thing running

LOL just messing
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post #9 of 13
Hey OP! We have almost identical set ups minus the case and CPU cooler, and that have a modular PSU

On that note, my first stage stable OC on this system was straight to 3.70GHz from stock. I know that sounds like a somewhat risk, and it definitely had me a little bit nervous, but I decided to bite the bullet and give it a shot. Now I'm pushing towards 4.0GHz on air.

If you wanna know the settings I used for 3.7GHz, just give me a shout! But do remember that every chip and every board is different so what might work for me might not work for you.

GL and happy overclocking!

EDIT: Holy crap, OP, your temps are so low. How's your ambients?
Edited by Swift Castiel - 1/17/11 at 3:26am
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Swifty <3
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post #10 of 13
Thread Starter 
Haha thanks guys! My ambient temps are TMPIN0 I think? So around 34-36C. Does that sound ok? I've seen this sensor reach the 40 mark on hot days when I'm gaming/stress testing.

Training wheels? lol. And Castiel, nice to know my setup was a good choice! 3.70Ghz hey?

I'm confused whether I should go for more or leave it as is. I don't NEED more Ghz but you know as well as me, once the overclocking bug bites it never stops lol

Cheers
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