Breaking the 4 Ghz barrier?

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plutoniumman

New Member
Hey all,
So I’m trying to OC my CPU past 4 Ghz, but no matter how much I increase voltage, Intel burn test always finds it to be not stable after a while.

I have an AMD Phenom II 955. The max temp I hit is 64˚C and the max voltage I applied is 1.5v. It’s just fine at 4 Ghz on 1.4v; passes Intel burn test for more than 100 runs on high stress setting and runs about 60˚C. Right now at 4 Ghz on 1.4v, it’s idling 33˚C and never exceeds 52˚C on normal loads. (Ie playing games, converting video etc)

I’m plenty happy going from 3.2Ghz to 4 Ghz on only 1.4v. I don’t really want to OC anymore because it plays my games and everything else almost perfectly; I just want to learn what’s limiting me from OCing more in this situation. If it helps I have a MSI 890FXA-GD70 for the MoBo. Only the CPU is OCd, everthing else is stock speed.


Any tips or info is appreciated :)
 
plutoniumman said:
Hey all,
So I’m trying to OC my CPU past 4 Ghz, but no matter how much I increase voltage, Intel burn test always finds it to be not stable after a while.

I have an AMD Phenom II 955. The max temp I hit is 64˚C and the max voltage I applied is 1.5v. It’s just fine at 4 Ghz on 1.4v; passes Intel burn test for more than 100 runs on high stress setting and runs about 60˚C. Right now at 4 Ghz on 1.4v, it’s idling 33˚C and never exceeds 52˚C on normal loads. (Ie playing games, converting video etc)

I’m plenty happy going from 3.2Ghz to 4 Ghz on only 1.4v. I don’t really want to OC anymore because it plays my games and everything else almost perfectly; I just want to learn what’s limiting me from OCing more in this situation. If it helps I have a MSI 890FXA-GD70 for the MoBo. Only the CPU is OCd, everthing else is stock speed.


Any tips or info is appreciated :)
Click to expand...
It's probably best just to keep it at a stable 4GHz. You won't really notice an extra 100MHz anyway. ;)
 
NOt all silicon (ie CPU) will be able to OC in the same way. It sounds like you have reached your motherboard or CPUs limit. As temps aren't out of control.
 
Thanks everyone for the replies :)

I’m trying core damage right now. Been running for about 45 minutes now. The max temp so far is 62.5˚C.

I upped the voltage to 1.425v. at 1.4v it was slightly unstable, giving me a BSOD once in a while, and failing intel burn test after 1000 runs. Now it seems better.


Benny Boy said:
As mentioned..

..the boards 4+1 power phase is most likely the limiting factor.
Click to expand...

Would buying a better PSU help? As it is now, I don’t have the greatest quality PSU around. I can’t remember the brand or model number, but I read a review about it (after I bought it—derp derp derp). I recall that they stated the PSU had no PFC, which according to the reviewer is bad. They didn’t like the PSU, really, which I don’t blame them since it was pretty cheap. I don’t really know much about PSUs except to choose the heavier one because it’s made of better quality parts.

That pesky salesman at fry’s convinced me to get this POS, even though I knew my old PSU would do just fine for now. Heck it’d probly do better than what I got now. He tried telling me that the motherboard (MSI 890FXA-GD70) wouldn’t even turn on with my old 500 watt PSU. I knew it was BS and I pretty much even told the guy, but I bought it anyway >.<
 
Im running my Intel at 4.3GHz at 1.45volts, stays resonably cool.

In terms of the PSU, active power factor control really has no economic benefit in small scale windings, especially when there is no reactive power tariff in residential areas usually. Power factor simply brings real power and apparent power closer to a ratio of 1. This energy is stored in the windings like a sponge, being returned back to the grid once the device is switched off. This is a waste, but not a consumption. Power companies charge industry with massive AC motors or fans etc a reactive power charge which they pay for, thus power factor control saves money.

So, active power factor control on a domestic PSU will provide few benefits outside of noise reduction in linear capacitors, and possibly heat reduction. Good to see, but not a deal breaker.

But, I would suggest you getting Corsair TX range which would be just right for you, may be a 550W to covers some updrade potential.
 
I personally ran prime95 blend for over 24 hours on a 4.2ghz OC on my 950. I heard the same "not so great things about intel burn" But even @ max stress with an H70 cooler highest core temps I saw I believe were 72c in a hot ambient room.
 
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