Why is my cpu voltage requirement jumping so high?

[dupue]

So i am new to overclocking, but i feel i have a fairly decent grasp and am learning nicely how to fine tune my cpu. However i am running into a problem with high cpu voltage requirement. Also forgive me for not knowing lingo 100%

Here is my rig
Asus sabertooth 990fx r2.0
amd phenom x6 1100t
8g patriot ram 1600 mhz ddr3
h100i corsair closed loop
sli evga 660ti cards
corsair hx1050 powersupply

I am currently overclocking my cpu at 19.0x multiplier with a 210 bus speed @ 1.35v cpu voltage and cpu n/b voltage @ 1.25v. I can run this perfectly fine in prime 95 for 3 plus hours with zero errors and my cpu never goes above 50c

When i try to bump the multiplier to 19.5x with 210 bus speed it takes 1.45v to run stable. Furthermore, when i bump it to 20x multiplier, i have to drop the front side bus to 205 and crank the cpu voltage to 1.5v

So my question is, why am i seeing such a drastic increase in voltage required to bump that multiplier from 19x on a relatively low voltage to high voltage (which i am not comfortable seeing my voltage bouncing up to 1.55, during prime95) just for a minor multiplier increase?

 

[Andy11466]

Don't overclock by increasing bus speeds. No one ever overclocks like that anymore. Try only increasing the multiplier. If you computer isn't stabilized try increasing your SouthBridge Chipset Voltage instead of VCore (1.3 is max) If the problem persists and you HAVE to set voltages pretty high for low multiplier increases, it could be that you got a bad chip. Not all chips are rated the same, some have overclocking capabilities +0.2 - +1.5

 

[dupue]

Don't overclock by increasing bus speeds. No one ever overclocks like that anymore. Try only increasing the multiplier. If you computer isn't stabilized try increasing your SouthBridge Chipset Voltage instead of VCore (1.3 is max) If the problem persists and you HAVE to set voltages pretty high for low multiplier increases, it could be that you got a bad chip. Not all chips are rated the same, some have overclocking capabilities +0.2 - +1.5

Thanks for reply! The reason i am overclocking with increasing the bus speed is i am seeing better results at lower voltages. When i overclock just the multiplier at 20x @200 bus speed, it is taking 1.5v to run stable, and when i run prime 95 it jumps to 1.56v. When i overclock 19x @210 bus speed i am able to run stable at 1.35v. So i basically get the same speed with way lower voltages

here is my current cpu-z specs




Is it normal for such an increase in voltage like this when you bump the multiplier like so? Even if its just by .5? Wondering if i am bottlenecking the overclock with a missed setting or overlooking importance of cpu n/b voltage?

 

[Andy11466]

It's normal when you don't set the voltages to manual. When you use Offset or Auto Settings the CPU may not get the juice fast enough causing it to crash, as it happens almost immediately. Unless your motherboard has a more advanced Bios setting, like a lot of the gaming motherboards do now you can use "adaptive mode" which is still kind of unstable at times.

and all chipsets qualities are made different. .5Ghz can range of .05 to .1 voltage or higher increments to keep it stable.

All in all your CPU is a 3.3Ghz chipset oced to 4.0
that is a pretty high jump so 1.45-1.59 would be completely normal at those overclocks.

 

[dupue]

i can respect that, is it fine to run at 1.45v constantly if the temps remain low? I ran a stress test for 8 hours and max temperature it hit was 59C.

Will running it at high voltage wear out the processor faster? My friend says as long as temps remain low voltage isn't that big of a deal. I would just like a second opinion before i leave it at that voltage 24/7.

 

[Andy11466]

i can respect that, is it fine to run at 1.45v constantly if the temps remain low? I ran a stress test for 8 hours and max temperature it hit was 59C.

Will running it at high voltage wear out the processor faster? My friend says as long as temps remain low voltage isn't that big of a deal. I would just like a second opinion before i leave it at that voltage 24/7.

Yes running that would be fine. I ran 1.5volts with my 8350 for a couple of years and ran great. Full load around 60c

Degration happens quicker if it's not cooled well or you're over the max volts which is 1.59 i believe