3770k stuck at 4.3GHz

[Mears]

Just bought a 3770K to replace a 3770 that I accidentally bought. Now I'm thinking I should've kept the 3770. I can't seem to get this thing stable past 4.3 GHz. If I set the multiplier to 44, bumping the vcore all the way up to 1.3v isn't enough to get it through more than a couple hours of Linx. My board is a Gigabyte GA-Z77X-UD3H. I haven't touched the bus frequency at all. From everything I read, I thought 4.5GHz would be very much obtainable.

 

[Phynaz]

Every chip is different. But think of it this way, what you are getting now is only 4% away from what you wanted. I'm building mine now and I'm only shooting for 4.4Ghz.

 

[2is]

Does that board have LLC? (Load Line Calibration)? My guess is vdroop is the main cause of your instability at 4.3GHz.

 

[cmdrdredd]

Enable CPU internal PLL overvoltage and set LLC to something higher. I don't know what your BIOS calls the LLC levels but on mine it's low, medium, high, very high etc. Some boards have it listed as level 1, level 2 etc.

 

[Kenmitch]

Just bought a 3770K to replace a 3770 that I accidentally bought. Now I'm thinking I should've kept the 3770. I can't seem to get this thing stable past 4.3 GHz. If I set the multiplier to 44, bumping the vcore all the way up to 1.3v isn't enough to get it through more than a couple hours of Linx. My board is a Gigabyte GA-Z77X-UD3H. I haven't touched the bus frequency at all. From everything I read, I thought 4.5GHz would be very much obtainable.

What did you build your rig for?
Gaming?
Encoding?
LinX?
Fold @ Home?
Scientific calculations for NASA?


Depending on your planned uses a couple of hours of LinX could equate to never seeing an issue at all with the overclock

Enable CPU internal PLL overvoltage and set LLC to something higher. I don't know what your BIOS calls the LLC levels but on mine it's low, medium, high, very high etc. Some boards have it listed as level 1, level 2 etc.

I doubt he'd need PLL overvoltage at such a low overclock.

 

[Don Karnage]

What are your full specs?

 

[borisvodofsky]

There is no way your 3770k is THAT terrible.

Like the others have said, you need to use M0ar voltage.

I looked up your board. Not the best motherboard for overclocking. WHICH means one thing, M0AR voltage. :sneaky:


So in conclusion, M0AR voltage!!

 

[borisvodofsky]

If you'd like, we can help you fine-tune the whole thing, If you post screen shots of EVERY bios page relevant to overclocking, memory, memory voltage, cpu, cpu voltage, memory timings, cpu power states.

 

[Kenmitch]

If you'd like, we can help you fine-tune the whole thing, If you post screen shots of EVERY bios page relevant to overclocking, memory, memory voltage, cpu, cpu voltage, memory timings, cpu power states.

Google is good at finding bios images FYI

http://www.pcstats.com/articleview.cfm?articleid=2653&page=7

Looks like most of the important stuff is covered anyways.

 

[cmdrdredd]

What did you build your rig for?
Gaming?
Encoding?
LinX?
Fold @ Home?
Scientific calculations for NASA?


Depending on your planned uses a couple of hours of LinX could equate to never seeing an issue at all with the overclock



I doubt he'd need PLL overvoltage at such a low overclock.

You think so, but when I turned it off any overclock I did past 4.2Ghz wouldn't work.

 

[Zap]

From everything I read, I thought 4.5GHz would be very much obtainable.

I thought 4.5GHz was for Sandy Bridge, and Ivy Bridge was a bit behind due to temperatures?

 

[cmdrdredd]

I thought 4.5GHz was for Sandy Bridge, and Ivy Bridge was a bit behind due to temperatures?

I don't know, but most everyone I've seen who has had decent cooling has been able to take a 3570k to 4.4 - 4.5. It's more about the cooling than the chip itself from what I've seen. Very hard to contend with the heat.

 

[Kenmitch]

You think so, but when I turned it off ANY overclock I did wouldn't work.

IB's temps kept me from being an early adopter so I haven't tried one yet. I figured they would tend to be similar to SB's or better when it comes to needing Internal PLL overvoltage enabled.

I've tested 5 SB's and the worst one needed Internall PLL overvoltage enabled at 4.5ghz with the best one (in sig) only needing it beyond 5ghz.

 

[cmdrdredd]

IB's temps kept me from being an early adopter so I haven't tried one yet. I figured they would tend to be similar to SB's or better when it comes to needing Internal PLL overvoltage enabled.

I've tested 5 SB's and the worst one needed Internall PLL overvoltage enabled at 4.5ghz with the best one (in sig) only needing it beyond 5ghz.

I had to make a correction to my post. Over 4.2Ghz didn't work without it. Not anything over stock. Still, I'd leave it on as it really hurts nothing and can help out.

 

[Idontcare]

IB's temps kept me from being an early adopter so I haven't tried one yet. I figured they would tend to be similar to SB's or better when it comes to needing Internal PLL overvoltage enabled.

I've tested 5 SB's and the worst one needed Internall PLL overvoltage enabled at 4.5ghz with the best one (in sig) only needing it beyond 5ghz.

Considering what the "internal PLL overvoltage" does, it is one of those things that most certainly should not be expected to scale one way or the other with the underlying process technology as it involves a lot of analog circuitry and scaling analog cmos is not easy or straightforward.

Given the OP's quandry, I'd like to know his temperatures when loaded. Cooling may simply be inadequate.

That said, enabling the "internal PLL overvoltage" merely as a means of determining if it is infact the limiting factor in his overclock should be tested if for no other reason than to rule it out as being unnecessary.

 

[TekDemon]

What kind of cooling do you have? Maybe you're being too aggressive on the voltage and overloading your cooling solution.
But ivy really is pretty terrible in terms of clocks.

 

[2is]

What did you build your rig for?
Gaming?
Encoding?
LinX?
Fold @ Home?
Scientific calculations for NASA?


Depending on your planned uses a couple of hours of LinX could equate to never seeing an issue at all with the overclock



I doubt he'd need PLL overvoltage at such a low overclock.

You'd be surprised. I tried 4.3 GHz with a +.15 offset and blue screened within a minute of running prime small FFT. Enabled internal PLL over voltage, kept everything else the same and re-ran prime. It ran for a good 10-15 min before getting an error on one of the cores. But no BSOD or lockup. A bump to +.20 stabilized it. Without internal PLL Overvoltage I needed to enable LLC for stability which was a lot harder on the CPU.

 

[Kenmitch]

You'd be surprised. I tried 4.3 GHz with a +.15 offset and blue screened within a minute of running prime small FFT. Enabled internal PLL over voltage, kept everything else the same and re-ran prime. It ran for a good 10-15 min before getting an error on one of the cores. But no BSOD or lockup. A bump to +.20 stabilized it. Without internal PLL Overvoltage I needed to enable LLC for stability which was a lot harder on the CPU.

To this day I've not tested a Ivy Bridge....Maybe pretty soon if I decide to downsize my rig.

On the Sandy Bridge it was one of those need it to boot at ??x things for the most part. If I could boot and load windows without it then I could get stability.

Guess maybe Ivy Bridge is more dependant on PLL overvoltage.

 

[borisvodofsky]

So I'm guessing the op's issue is resolved?

 

[Smoblikat]

I thought 4.5GHz was for Sandy Bridge, and Ivy Bridge was a bit behind due to temperatures?

I think 4.8 - 5.0 is SB

 

[borisvodofsky]

I think 4.8 - 5.0 is SB

never seen an unlocked sandy that couldn't do 4.8-5.

It's only ever a user error, because they n0 good at 0verclock.

 

[2is]

Or maybe you just haven't seen it.

 

[hokies83]

I can enable LLC and get 4.6ghz with volts set to auto and passed 6hrs of Prime 95.

 

[borisvodofsky]

I can enable LLC and get 4.6ghz with volts set to auto and passed 6hrs of Prime 95.

See this is what I'm talking about "Volts set to auto"..

This is how you get face speared.

 

[hokies83]

See this is what I'm talking about "Volts set to auto"..

This is how you get face speared.

Indeed.. was seeing how far i could go on auto.

I am able to do 5ghz with 1.37v And it passed 6 hrs of prime 95. with temps around 90c On Air.