G3258 doesn't go past 4.5Ghz - advice

[Rohan991]

Hi there thanks for taking your time to read this (if you carry on aha). Basically I am pretty new to overclocking and this site is totally new to me so apologies if I do something wrong in advance. I have managed to get my G3258 to 4.5Ghz at 1.26v and is very stable but I obviously would like more! So when I bump up my multiplier to 46 it takes until 1.3v to stop blue screens happening instantly but it still isn't stable for more than 5 minutes Just wondered whether I am doing something wrong because I know that there are other adjustments I could make for a stable overclock just not sure where to start. Any help or advice is appreciated!
Thanks

PC Specs:
Intel Pentium G3258 @ 4.5
Motherboard: MSI Gaming 9 AC
Memory: 16GB TeamGroup @ 2400mhz cl11
Graphics: GTX 970 MSI @ overclocked...
SSD: Samsung 850 Pro w/ RAPID mode enabled
HDD: 300GB WD Velociraptor
Case: Bitfenix Shinobi XL Window (White)
PSU: Corsair CX750

[Bagnaj97]

How are your temperatures looking? Don't forget that overclocks aren't guaranteed - you might have got an unlucky chip!

[Rohan991]

They are around 75 while running prime95 at 4.5ghz then they jump to about 80-85 at 4.6 but it cuts out because its unstable but you do have to remember that 1.3v is low and I'm running stock cooler lol

[Bagnaj97]

I've not got any Intel systems, but from a quick look around online it looks like 4.5GHz at those temps on the stock cooler is very good! Most advice online suggests keeping your temp below 80, which could well be why 4.6 and the voltage bump isn't working for you.

If you get a better cooler you could up the voltage to 1.3 and see how far that takes you - but as always with OCing, you might have hit the wall already. 1.3v isn't low, there are a lot of posts saying the max safe voltage is 1.325v.

[watercooled]

Temperature is related to stable clock speed - a processor can be stable at say 4GHz an 1.2V at 50C but it will become unstable at 70C. It's part of the reason extreme overclocking methods actually use sub-ambient cooling methods e.g. phase change/water chillers, and liquid nitrogen/helium.

Pretty much as Bagnaj97 says, it's probably that the stock cooler isn't up to the job.

4.5GHz seems to be about the clock speed most reviews I saw aimed for with 4.6 being obtainable but 4.7 being unstable (on a much more capable cooler). Generally you don't want to run a CPU just on the border of being unstable, so backing off to at least 4.5GHz would probably be sensible there.

And TBH the difference in performance between 4.5 and 4.6 really isn't worth stressing over.

[Rohan991]

I know yeah I'm quite happy comparing to other people's results! Is that what would cause it to BSOD then? Like when it gets too high temps? If that's the case I'll just buy a 212 EVO cooler I wanted one anyway and just hit money!
Thanks dude (I would thank you but don't know how!)

Thanks man! Great looks like I'm gonna have to order the Hyper 212 EVO! Any objections or better product at that price?

[watercooled]

Sorry, I added more to my post above after you replied. You can't hit thanks until you've made a certain number of posts but don't worry about it.

BSODs when overclocking are a normal sign of severe instability. It can be caused by temperatures but regardless of cooling or temperatures, CPUs reach a point where the voltage is no longer sufficient to sustain the set clock speed, and you obviously don't want to go too far on the voltage or you'll just destroy the processor.

With regard to the 212, it may or may not help with the overclock, it depends on the individual processor. However you're looking at spending close to the cost of the CPU itself in order to gain maybe 100/200MHz which will make next to no difference in performance for the most part.

[Rohan991]

Well my future plan is to buy a i5 4690k so the cooler can just be put on that afterwards so I'm gonna pull the trigger and buy that cooler thanks though dude!

I know that voltage can only be taken so far but I think my CPU is pretty good and I don't need it for a long period of time so running it a little high isn't a problem! I believe the temps must be the problem! And aw okay man have a REAL THANKS from me though