Am I OCing properly?

[DarkRogue]

Hello everyone,

I'm tweaking my new build currently. Some defective RAM delayed everything for a bit.
I've got an i7-3770k and it's the second time I've tried to OC a CPU.

With my E8400, it was fairly simple; Bump FSB from 333MHz to 400MHz and reboot. I was done with a 3.6GHz OC.

SB and IVB appear to have a lot more options now, though, so I'm somewhat confused.

Currently, I have my 3770k at 4.6GHz. (Other related stuff - ASUS P8Z77-V Deluxe, 2x8GB Corsair Vengeance LP DDR3-1600 @ 9-9-9-24-1T & 1.5v)

What I did was just change the turbo multiplier thing to 46. The PC boots at 48 / 4.8GHz, but fails prime95/linx, as well as CPU-Z showing something like 1.44v vcore at boot. 4.7GHz was more moderate at around 1.38v but also failed prime95 (but passed 3 runs of linx.)
4.6GHz appears to be stable, 10 runs of linx and 90 minutes of prime95 large fft.

However, thus far I've only left voltage settings on auto. I wanted to decrease temps a bit and lower power usage by trying out the offset modes. Unfortunately, even the minimal offset of -0.005v causes the PC to be unable to boot. Am I doing something wrong, or is my CPU simply unable to maintain the OC with anything other than the stock/auto voltage?

Thanks.

 

[borisvodofsky]

Hello everyone,

I'm tweaking my new build currently. Some defective RAM delayed everything for a bit.
I've got an i7-3770k and it's the second time I've tried to OC a CPU.

With my E8400, it was fairly simple; Bump FSB from 333MHz to 400MHz and reboot. I was done with a 3.6GHz OC.

SB and IVB appear to have a lot more options now, though, so I'm somewhat confused.

Currently, I have my 3770k at 4.6GHz. (Other related stuff - ASUS P8Z77-V Deluxe, 2x8GB Corsair Vengeance LP DDR3-1600 @ 9-9-9-24-1T & 1.5v)

What I did was just change the turbo multiplier thing to 46. The PC boots at 48 / 4.8GHz, but fails prime95/linx, as well as CPU-Z showing something like 1.44v vcore at boot. 4.7GHz was more moderate at around 1.38v but also failed prime95 (but passed 3 runs of linx.)
4.6GHz appears to be stable, 10 runs of linx and 90 minutes of prime95 large fft.

However, thus far I've only left voltage settings on auto. I wanted to decrease temps a bit and lower power usage by trying out the offset modes. Unfortunately, even the minimal offset of -0.005v causes the PC to be unable to boot. Am I doing something wrong, or is my CPU simply unable to maintain the OC with anything other than the stock/auto voltage?

Thanks.

pu pu pu.. 1.38 for 4.7 seems fine.

turn off your C1E, C3, and C6

Lower cpu pll to 1.7

Disable ALL POWERSAVING features, This includes the EPU, which is junk. flip the switch on the motherboard.

Make sure to disable cpu spread spectrum.

 

[DarkRogue]

EPU and TPU are disabled by default as far as I can tell.
CPU Spread Spectrum is also disabled.

I'm not sure what the default voltages for PLL and all those other things are, which is why I didn't want to change any of those yet.. it seems I can't offset from a "stock" voltage for those; it's either auto, or specify a completely manual number. Is 1.7v for PLL safe? It's at like 1.8v right now or something.

Why would I want to disable all those power saving features? The whole idea is to maximize performance while minimizing power usage.

 

[dma0991]

Use manual voltage with LLC to prevent large fluctuations in the voltage you've set.

 

[DarkRogue]

As I understand it, wouldn't setting a manual voltage override the voltage settings entirely, and it'd be feeding like 1.3v even when idling at 1.6GHz?

 

[Smoblikat]

pu pu pu.. 1.38 for 4.7 seems fine.

turn off your C1E, C3, and C6

Lower cpu pll to 1.7

Disable ALL POWERSAVING features, This includes the EPU, which is junk. flip the switch on the motherboard.

Make sure to disable cpu spread spectrum.

Keep C1E on, put PLL to 1.75

 

[Puppies04]

As I understand it, wouldn't setting a manual voltage override the voltage settings entirely, and it'd be feeding like 1.3v even when idling at 1.6GHz?

Personally I prefer offset mode + speedstep and the power saving features turned on but when I was figuring out how much voltage my CPU needed to be stable I ran it on manual voltage with the aforementioned features turned off, it makes it a lot easier to get a stable overclock. Once you have that information you can turn them back on if you want.

P.s before anyone chirps up about my cpu "only" being at 4ghz I am talking about when I was running it at 4.8.

 

[Magic Carpet]

P.s before anyone chirps up about my cpu "only" being at 4ghz I am talking about when I was running it at 4.8.

Let me guess.., there wasn't much difference in general use? Heck, I bet.. the main bottleneck was you, trying to exploit all that processing power. Welcome back, to the real world

However, thus far I've only left voltage settings on auto. I wanted to decrease temps a bit and lower power usage by trying out the offset modes. Unfortunately, even the minimal offset of -0.005v causes the PC to be unable to boot. Am I doing something wrong, or is my CPU simply unable to maintain the OC with anything other than the stock/auto voltage?

Thanks.

Set it to Auto, find out in Windows (CPU-Z) how much Auto is actually is. Then, manually lower it, notch by notch until you crash-stable

 

[Puppies04]

Let me guess.., there wasn't much difference in general use? Heck, I bet.. the main bottleneck was you, trying to exploit all that processing power. Welcome back, to the real world

Oh i'm sure there was a difference, a few frames extra here, a tenth of a second unzipping a file there. Could I see that difference.... nope.

 

[Magic Carpet]

Oh i'm sure there was a difference, a few frames extra here, a tenth of a second unzipping a file there. Could I see that difference.... nope.

Technically, of course. Well, it's good to have extra speed under the hood. One day, you might going to need that.