Overclocking old processor

[rohitk375]

I want to overclock my pentium 4 506 2.66ghz .As I am new to overclocking please someone advice some stress testing utility for it as I am not sure :unsure:  that today's software would overwhelm the processor...........

[FizzyFantom]

Old Pentium CPUs have a locked multiplier (and your motherboard is likely to be locked). That being said you can change the FSB (maybe in your BIOS or through some software) to improve the performance. It isn't really advisable as these CPUs are quite old and only single core, but if you're looking to play about with it (just for fun) then you should read these threads:

http://www.techrepublic.com/article/overclocking-guide-for-intel-celeron-and-p4-processors/

http://www.tomshardware.co.uk/forum/257360-29-intel-pentium-overclock

http://www.hardwaresecrets.com/article/How-to-Overclock-a-Socket-775-Pentium-4/198

 

I think Prime95 should be alright for testing these CPUs, but someone may correct me on that.

[Akolyte]

Firstly, what kind of cooling do you have?  Do you know if your processor is unlocked?  Do you know if your motherboard allows you to overclock?

 

And did you buy your computer from an OEM like Dell, HP or Acer?

 

Just make sure you can overclock and you have good cooling first.    

[LukaP]

@DEcobra11 ghetto is love ghetto is life, show this young padawan teh way

[Leonard]

You may only get it to 2.67Ghz...don't bother.

[harrynowl]

Sheesh... 775 P4? if mb is locked pinmod it and make tricks with the PWM voltage controller

Sheesh... 775 P4? if mb is locked pinmod it and make tricks with the PWM voltage controller

And use setfsb

Those 775 p4s can get 3.5ghz 90% of the time.

Very common 'locked multiplier' misconception for old chips

[rohitk375]

You may only get it to 2.67Ghz...don't bother.

I've seen an article on sleektech.something and he ramped up his processor to 3.8 ghz on stock heatsink..........

[Leonard]

I've seen an article on sleektech.something and he ramped up his processor to 3.8 ghz on stock heatsink..........

How long did the CPU last....an hour or two????

[SkilledRebuilds]

BSEL MODS!!!!!!

What is a BSEL mod?

A BSEL mod allows a CPU to be run at a higher speed via hardware modification, without changing any settings in software (Either the BIOS or via software such as SetFSB). Most motherboards use voltage/ground from the pins on a CPU to determine the CPU’s FSB.

The idea of a BSEL mod is to physically connect pins on a CPU, to make the motherboard ‘think’ that the CPU has a higher FSB than it actually does.

For example, the Intel Pentium Dual Core E2160 CPU (1.8GHz) has an FSB at 800MHz, a bus speed of 200MHz and a multiplier of 9 to give the CPU its speed of 1.8GHz (200 x 9). Now, if the pins on the CPU are connected like a CPU with a FSB of 1066MHz, the bus speed would now be 266MHz, and the CPU would now run at 2.4GHz (266 x 9).

 

I made a Q6600 run at 3.0Ghz on stock volts via a small mod to change the FSB to 1333mhz instead of 1066mhz. (Had a dell Mobo and was the only option to OC)

http://www.overclockers.com/forums/showthread.php/574240-Pad-Mod-for-a-P4-506-Prescott

 

Google search for "P4 506 BSEL" - https://www.google.com.au/search?q=p4+506+mod&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-US:official&client=firefox-a&channel=sb&gfe_rd=cr&ei=-vwOVPmsKOvC8ge0mYH4CA#safe=off&rls=org.mozilla:en-US:official&channel=sb&q=p4+506+mod+bsel

 

What is a BSEL MOD?
http://www.overclock.net/t/341123/intel-bsel-vid-mod-guide

 

Why would I need to do this?
If you’re motherboard can overclock your CPU from the BIOS, you probably don’t need a BSEL mod. However, for motherboards that have no overclocking settings, like OEM motherboards, this is a simple method of overclocking a CPU. Alternatively, if your motherboard’s BIOS has difficulty overclocking, the mod is a simple way to increase the CPU speed.

 

Good luck with it

[rohitk375]

BSEL MODS!!!!!!

What is a BSEL mod?

A BSEL mod allows a CPU to be run at a higher speed via hardware modification, without changing any settings in software (Either the BIOS or via software such as SetFSB). Most motherboards use voltage/ground from the pins on a CPU to determine the CPU’s FSB.

The idea of a BSEL mod is to physically connect pins on a CPU, to make the motherboard ‘think’ that the CPU has a higher FSB than it actually does.

For example, the Intel Pentium Dual Core E2160 CPU (1.8GHz) has an FSB at 800MHz, a bus speed of 200MHz and a multiplier of 9 to give the CPU its speed of 1.8GHz (200 x 9). Now, if the pins on the CPU are connected like a CPU with a FSB of 1066MHz, the bus speed would now be 266MHz, and the CPU would now run at 2.4GHz (266 x 9).

 

I made a Q6600 run at 3.0Ghz on stock volts via a small mod to change the FSB to 1333mhz instead of 1066mhz. (Had a dell Mobo and was the only option to OC)

http://www.overclockers.com/forums/showthread.php/574240-Pad-Mod-for-a-P4-506-Prescott

 

Google search for "P4 506 BSEL" - https://www.google.com.au/search?q=p4+506+mod&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-US:official&client=firefox-a&channel=sb&gfe_rd=cr&ei=-vwOVPmsKOvC8ge0mYH4CA#safe=off&rls=org.mozilla:en-US:official&channel=sb&q=p4+506+mod+bsel

 

What is a BSEL MOD?

http://www.overclock.net/t/341123/intel-bsel-vid-mod-guide

 

Why would I need to do this?

If you’re motherboard can overclock your CPU from the BIOS, you probably don’t need a BSEL mod. However, for motherboards that have no overclocking settings, like OEM motherboards, this is a simple method of overclocking a CPU. Alternatively, if your motherboard’s BIOS has difficulty overclocking, the mod is a simple way to increase the CPU speed.

 

Good luck with it

I appreciate your reply a lot and thank you for your valuable time. But, my mobo is gigabyte GA-8I865GM-775 which is overclockable. I just ran prime 95 which led to dangerous temps of 65⁰C which is pretty high for a pentium. I need to know if  there is any lighter stress testing utility for older cpus' or should I change my cooling solution(presently the stock heatsink)

[SkilledRebuilds]

I appreciate your reply a lot and thank you for your valuable time. But, my mobo is gigabyte GA-8I865GM-775 which is overclockable. I just ran prime 95 which led to dangerous temps of 65⁰C which is pretty high for a pentium. I need to know if  there is any lighter stress testing utility for older cpus' or should I change my cooling solution(presently the stock heatsink)

Grabbing a lighter CPU test is pointless, you won't be testing it efficiently if you do this you may as well write off any expectations of stability testing.

OCCT/Prime95/Aida64 are all good however.

 

You Mobo can OC, and you can STILL use the mod and then OC with your board further

Yes, stock cooling isn't for OC's, they do the job required for stock clocks. (Adding other fans to the case may help if not upgrading the Cooler)