[how to]overclock a cpu with locked multiplier

[legopc]

I am kind of tired of the people saying that it is impossible to overclock a CPU without an unlock multiplier. So this is a tutorial on how to overclock your CPU using baseclock.

Specs: 

Intel dh55tc 

I3 550 

2gb 1333mhz kingston ram 

300w noname psu 

 

Step one: 

Go into the bios, most of the time you need to press f2 or del. 

Step 2:

Go to the tab that has the overclock settings for me this was preformance.

Step 3: 

Switch the host clock frequency overide to manuel.

Step 4:

Select the desired host clock frequency. 

Step 5: 

Save the settings, Go into windows and do some stress testing and see if the clock is stable. 

If you get bsod just up the voltage or select a lower base clock. 

Then test again and you know the rest.

 

thanks whiskers for fixing some grammer errors  

[flibberdipper]

Yep. That's how I overclocked my Sempron and Pentium 4.

[Bad2049]

AMD Phenom II X6 1055T here and OC'd. BTW, who said you can't OC a locked multiplier CPU?

[Levent]

AMD Phenom II X6 1055T here and OC'd. BTW, who said you can't OC a locked multiplier CPU?

most of the 12 year olds still say that.

[legopc]

AMD Phenom II X6 1055T here and OC'd. BTW, who said you can't OC a locked multiplier CPU?

couple of guys have not going to give names

[Cwazywazy]

My CPU (I think) is supposed to have a locked multiplier even though I can kick it up to x47 in AMD Overdrive. (BIOS only goes up to x36)

 

My old P4 rig had no overclocking limits though I didn't know much about voltages and RAM timings and all that so even though I got it up to 4GHz once it was horribly unstable. (Had a good heatsink, heat was no issue.)

 

And for my bus speed I have it running at 114MHz from 100MHz stock but people say that with my CPU they can go over 130 just fine, but my stupid MSI Military Class motherboard has no VCore control.

[flibberdipper]

couple of guys have not going to give names

I don't bother to remember their names.

[Bad2049]

couple of guys have not going to give names

I must have missed those posts.

 

most of the 12 year olds still say that.

This is very true, though, I do know of a few older individuals that are full of false information regarding computer hardware and capabilities. 

[Bad2049]

My CPU (I think) is supposed to have a locked multiplier even though I can kick it up to x47 in AMD Overdrive. (BIOS only goes up to x36)

 

My old P4 rig had no overclocking limits though I didn't know much about voltages and RAM timings and all that so even though I got it up to 4GHz once it was horribly unstable. (Had a good heatsink, heat was no issue.)

 

And for my bus speed I have it running at 114MHz from 100MHz stock but people say that with my CPU they can go over 130 just fine, but my stupid MSI Military Class motherboard has no VCore control.

 

Found this bit of info regarding your APU:

 

 

"Empty Overclocking" is a term we just made up, to describe unreal overclocking headroom that does not translate into any performance improvements, with AMD's A8-3850 APU. This chip can be set to run at base clock multiplier value above 29x on some motherboards, that will increase clock speed being reported to you, but that "increased" clock speed will not translate to any performance improvements at all. 

 

This means that the multiplier is ineffective in driving the clock above its maximum default value. So the next time you see screenshots screaming something like "6.00 GHz" on air with the base clock at its default 100 MHz, don't be fooled, trust only those overclocking feats in which the multiplier is set at the maximum default (29.0x) or lesser, and in which the overclocker has increased the base clock among other things. 

 

 

 

Update: It seems like AMD is aware of the issue, and forewarned reviewers about it. Apparently a glitch in the BIOS code allows the users to "set" higher multiplier values than the chip can respond to, even as the chip doesn't run at those values. Utilities like CPU-Z read those BIOS-set values and display the effective clock speed, even as the actual clock speed doesn't budge. AMD recommends only the base clock increase method for overclocking. As always, AMD warned that overclocked chips are not covered by product warranties. Perhaps future BIOS updates by motherboard vendors will fix this bug.

 

Source.

 

 

It may be fixed on your current BIOS and it may not..

[Cwazywazy]

Found this bit of info regarding your APU:

 

 

Source.

 

 

It may be fixed on your current BIOS and it may not..

My board shipped with the latest BIOS, which I hate because I can't revert it. Yeah, I knew there was no performance improvements, but it's still nice to brag about my CPU running 5.4GHz on stock voltage.

[nokturrduk84]

yeah with bclk, that's how I OC'ed my i3 -550 in the past.

[harrynowl]

That's how I overclocked my old Conroe Pentium E2200, base at like 310 for 3.4

[Cryptonite]

couple of guys have not going to give names

Dude, please just warn people that they should not try this on LGA 1155 past an increase of just 5 on the Bclock, else they might damage their hard drives.

[Maslofski]

so would this damage my i5 650 in any way?

[Guest Jagobeth]

Dude, please just warn people that they should not try this on LGA 1155 past an increase of just 5 on the Bclock, else they might damage their hard drives.

how can the hard drives be damaged??

[Cryptonite]

how can the hard drives be damaged??

Because the hard drives, RAM and PCI slots are linked with the Bclock and get overclocked along with the CPU when you adjust it.

 

http://www.tomshardware.com/forum/283798-29-bclk-ratio

http://www.bit-tech.net/hardware/cpus/2011/01/07/how-to-overclock-the-intel-core-i5-2500k/2

[Cryptonite]

so would this damage my i5 650 in any way?

650s are LGA 1156 so...

not unless you take voltages too high.

[Guest Jagobeth]

Because the hard drives, RAM and PCI slots are linked with the Bclock and get overclocked along with the CPU when you adjust it.

 

http://www.tomshardware.com/forum/283798-29-bclk-ratio

http://www.bit-tech.net/hardware/cpus/2011/01/07/how-to-overclock-the-intel-core-i5-2500k/2

thanks for the info

[Cryptonite]

thanks for the info

that's why I'm warning him to put that in his post, it's important for newbies to overclocking to know these things as to not damage their hardware.

[ragedev]

CPU Strap overclocking is quite useful, it basically is changing the base clock only for the CPU and RAM with BCLK frequencies of 125MHz, 166MHz etc..

[Maslofski]

650s are LGA 1156 so...

not unless you take voltages too high.

 

and what about the temperature, what temperature would be a good roof on load? right now its 60°C, or 70 on extreme and long use

[Cryptonite]

and what about the temperature, what temperature would be a good roof on load? right now its 60°C, or 70 on extreme and long use

max load? I'd not let it go past 85 C max. however it is recommended to keep it below 80 C.

What's fun about socket 1156 is that you can get quite an overclock out of it without having much of a thermal change. you should be able to hit around 4GHz with ease I believe. (if your chip isn't too bad)

[Maslofski]

max load? I'd not let it go past 85 C max. however it is recommended to keep it below 80 C.

What's fun about socket 1156 is that you can get quite an overclock out of it without having much of a thermal change. you should be able to hit around 4GHz with ease I believe. (if your chip isn't too bad)

 

ok, ill look into it then

[Kuzma]

This is how I got from 2.27 Ghz to 3.9

[SkilledRebuilds]

Because the hard drives, RAM and PCI slots are linked with the Bclock and get overclocked along with the CPU when you adjust it.

 

http://www.tomshardware.com/forum/283798-29-bclk-ratio

http://www.bit-tech.net/hardware/cpus/2011/01/07/how-to-overclock-the-intel-core-i5-2500k/2

Wow... And I thought it was common knowledge.... guess not.

This is why research is so important.

Anyone who goes into base clocking without knowing this...  expect higher failure rates on hardware being pushed too far from the motherboard, because I'm sure like normal overclocking.. if its stable, they push further and further. Which is VERY bad for base clocking.

I used to test it, and when hitting 4.8ghz, adding baseclock increases to manage 4.95ghz, but knew of the risks, and brought it back to normality and pushed further multi's.