i5 650 OC help!

[HURRIC4NE]

i'm sort of a novice when it comes to OC-ing..
as most of you guys know, i had a dell factory bs PC and i ripped everything off of it part by part and upgraded it part by part (theres a thread about it)

(i'm using a intel i5 650) (2C/4T, 1156)

so i started OC-ing and thanks to youtube (LinusTechTips) i was able to post boot at 4.7 ghz (1.4 Voltage, 1.3 VTT), but it didnt boot when i hit 5.0 in the same voltages (keep in mind i'm using a H100) do i need to increase the voltages? how much do i exactly need for a 5.0? thats the holy grail and i aint restin till i hit it.

i'm using 4x2 gb Vengeance 1600 mhz memory (8-8-8-24) and i put them in 1.528V instead of the normal 1.5 (should i increase voltage for memory unless i'm increasing the mhz?)

i'm using a MSI P55A Fuzion motherboard, should i do the trial and error method? and is there a possibility of me burnin out my cpu/motherboards? if so, what do i keep out of reach of?

 

[Blastman]

Clarkdales, even though they are made on the same 0.32 fab process as SB (Sandy Bridge), will not overclock as well as SB at the same vcore. SB CPU’s overclock about 200 - 400Mhz faster with the same vcore as compared to Clarkdale i3/i5. For eg., I can do 4.0Ghz at 1.21v on my i3-530, a SB i5-2500K will do 4.2 – 4.4Ghz at that vcore.

At 1.40v, generally, I think the best you can hope for is in the 4.4 – 4.6Ghz range stable. To get 5.0Ghz you are going to need more than 1.40v. You might be able to get your i5-650 to post or get to windows higher than 4.6Ghz at that 1.40 vcore, but it probably won’t be stable under stress test.

Here are a couple of forum threads with overclocked Clarkdales and the vcores they used …

xtreme
overclock.net

There are two 5.0Ghz i3-530’s in that xtreme list, and they were using 1.59/1.64v and one at overclock.net that used 1.568v.

If you’re willing to push more than 1.40v into your CPU you might make 5.0Ghz, but then you will have to decide if the risk is worth it. With water cooling you might be able to keep the temps in line, but that vcore is still going to be pretty high.

Also, keep the memory speeds below 1700Mhz and preferably close to 1600Mhz max, the IMC on Clarkdales generally doesn’t like faster speeds than that.

My thinking is that a good overclock for Clarkdale is 4.4-4.6Ghz for 24/7 use and anything much past that is hardly going to be noticeable.

 

[HURRIC4NE]

so far from the bios screen it tells me i'm doing a post of 4.3 @1.35, however on windows, i'm using CPUZ and OCCT and i'm getting 4.5 (says i got a 25X multiplier ? how?) currently i'm stability testing... is OCCT cpu testing okay? if so, how long should i make it go for? (its been 7 minutes+ stable as of right now)

EDIT: i did some more literary work and some minutes of Prime 95 and 30 minutes of CS:GO....
what happened was that intel turbotech was left enabled... so i thought lets just leave it there, and upped the voltage and cpu frequency to 4.5ghz.. then i ran OCCT for 3 minutes then windows crashed.. so i got back in the bios and increased the voltages, and my bios 4.5 is now running at 4.7 (i somehow got a gift of an additional multiplier from intel) and THEN i ran some prime 95 and OCCT, maximum temps was 70C... at 1.47 core voltage. (ran for around 10 minutes), then i did a stable 30 minutes of CS:GO gameplay and it was alright... so i think this is it for me... 4.7...

if i ever crash i guess i'll just increase the voltages a little bit... (i'm using an H100 btw)

 

[Blastman]

I5-650 have TB (turbo boost) up to 2 multipliers higher than the stock 24x. +1 if both cores loaded, +2 if only one core loaded.

I would turn off TB in the BIOS if overclocking.

Probably want to keep vcore <= 1.40v for long term use.

What I did for overclocking is to find the lowest vcore where I can boot to windows and then add 0.05 &#8211; 0.06v to that for to get a stable vcore under stress. Start at 1.40v or lower and 4.5Ghz then lower vcore and boot up. After finding lowest boot vcore add .05v and stress test for 15 minutes. (I know people like to stress test much longer but I don&#8217;t think it&#8217;s needed for this method).

4.5Ghz is a good overclock. Vcore needed is rising quickly at that point so that&#8217;s close to the limit where people leave their Clarkdales.