How to turn off two cores?

[johnnysti08]

Hi guys,
I getting absolutely no suceess overclocking my cpu, some people say its my motherboard, some say its my PSU. I then want to try taking off two cores to see if it will work then. How to do so?

SPECS
Phenom X6 1045T @2.7GHZ
Sapphire Radeon 7770
G.Skill Ares 8GB DDR3 1600 Ram
ASROCK N68C-S UCC
Omega 750W [+12V rail] -33A (Yes I Know its generic)
3 Case Fans

 

[tracerbullet]

No success in what way? Details? Or was that a different thread here?

 

[johnnysti08]

No success in what way? Details? Or was that a different thread here?

No when i say no success i mean when running prime95, at 3.3GHZ computer automatically shuts off and when running at 3.1Ghz prime95 goes for 15 minutes then shuts off. My cpu also downthrottles when running prime

 

[JimPhreak]

No when i say no success i mean when running prime95, at 3.3GHZ computer automatically shuts off and when running at 3.1Ghz prime95 goes for 15 minutes then shuts off. My cpu also downthrottles when running prime

What are your temperatures like when running Prime? Sounds like an overheating issue to me. What are you using for cooling and have you tried reseating the heatsink/waterblock?

 

[Vesku]

That motherboard is definitely not designed to handle OCing a x6 or a 125W x4 for that matter. As for disabling cores, I don't see the option listed in the manual:

http://www.asrock.com/mb/NVIDIA/N68C-S UCC/?cat=Manual

You can check if it's a sub option of UCC (Unlock CPU Core) on the OC Tweaker screen.

 

[johnnysti08]

That motherboard is definitely not designed to handle OCing a x6 or a 125W x4 for that matter. As for disabling cores, I don't see the option listed in the manual:

http://www.asrock.com/mb/NVIDIA/N68C-S UCC/?cat=Manual

You can check if it's a sub option of UCC (Unlock CPU Core) on the OC Tweaker screen.

Yes there is a unlock core UCC option. Got no clue what that is though

EDIT: My bad, in bios i see Unlock UCC and there are two options, enable and disable

 

[johnnysti08]

What are your temperatures like when running Prime? Sounds like an overheating issue to me. What are you using for cooling and have you tried reseating the heatsink/waterblock?

No my max temp at 3.3GHZ is 32 degrees

 

[JimPhreak]

No my max temp at 3.3GHZ is 32 degrees

What are you reading your temps with?

 

[johnnysti08]

HWmonitor and speccy. They both say the same thing for cpu core

 

[Vesku]

Yes there is a unlock core UCC option. Got no clue what that is though

EDIT: My bad, in bios i see Unlock UCC and there are two options, enable and disable

Then I don't think that motherboard has the core on/off feature available.

 

[jaqie]

unlock UCC should show new options when available of turning on and off individual cores, or give another option that allows you to turn on that feature. if it doesnt, theres no way to disable cores at will in that mobo and you should replace it with one that can handle your cpu.

 

[Gronnie]

If it is available it should be an option on your motherboard, at least that's where the option is for me. If it is not there, then your board probably doesn't have that capability.

 

[VirtualLarry]

your problem is the power draw of the cpu is too much for the mobo.

 

[Trm8r]

My ECS board won't allow any CPU overclocking so I use AMD Overdrive. Like yours, my 1090t will shut the computer off with 6 cores running prime95. Overdrive allows selecting multipliers for each core and how many cores will turbo. Mine is set for 6 cores at 18x and 2 turbo cores at 20x.

 

[cytg111]

No my max temp at 3.3GHZ is 32 degrees

Throttling at 32 deg celcius? Common.

 

[tracerbullet]

your problem is the power draw of the cpu is too much for the mobo.

This makes a lot of sense. It's not the heat doing it, it's the overall inability to get the power it needs. If this was my setup, I would definitely be looking at motherboards right now.

 

[johnnysti08]

Well i disabled two cores and so far it ran at 2.9ghz and 3.1Ghz for an hour each with no problems whatsoever, then I took it off. I will try to go higher to see how it responds

 

[Idontcare]

ASROCK N68C-S UCC

Your mobo only supports 95W CPUs.

http://www.asrock.com/mb/NVIDIA/N68C-S UCC/?cat=CPU

There is a reason why the mobo maker spec's it as supporting 95W CPUS and nothing higher.

If it was capable of supplying the power to the socket as needed to support 110W/125W/140W CPUs then the mobo maker would have included them in the list of supported CPUs.

Overclocking your 95W CPU to be a 125W CPU is no different in this regard to putting a 125W CPU into the mobo in the first place, and what do you think would happen if you put a 125W CPU into your mobo when the mobo only supports at most a 95W CPU?

You are playing with fire, literally, you are going to overheat your mobo at some point, it will melt, and when it does there is a chance it is going to catch on fire.

Don't be a statistic here, be responsible, if you want to OC your 6-core CPU then get the right mobo for the job, one that isn't going to meltdown on you.

 

[johnnysti08]

OK I hear you but could I ask, If I orignally have a 95W 6 core processor. I then Disable 2 cores. Then I increase the speed to 3.1GHZ. Isnt It in theory I am not passing 95W. As I dont have much experience, im asking to learn

Thanks

 

[Idontcare]

OK I hear you but could I ask, If I orignally have a 95W 6 core processor. I then Disable 2 cores. Then I increase the speed to 3.1GHZ. Isnt It in theory I am not passing 95W. As I dont have much experience, im asking to learn

Thanks

Of course that is just fine. The point is do what you like provided you don't end up asking the mobo to push more amps than it was designed to push.

Disabling cores gives you more budget (reduces the amperage) to allocate towards the other cores. You are approaching it the right way.

And don't let my sternly worded post come across like I am some expert on high that has never done an oops. I did all sorts of stupid stuff that should have burned my house down ten times over. Just trying to pass along some of my hard-learned lessons is all, trying to save you the trouble of learning these things the hard way yourself.

 

[Matt1970]

I would do some benchmarks to confirm but I don't think 4 cores at 3.1 is going to be faster than 6 cores at 2.7 will be, You are going to need a lot more overclock to make up for the loss of 2 cores.

 

[jaqie]

Benchmarks are not games. There are many games that cannot and will not take advantage of >4 cores, some even still only use one. So yes, the lower core count and higher clocks can most definitely be faster for games.

 

[VirtualLarry]

Still, OP should invest in a real motherboard.

 

[johnnysti08]

Thanks guys for all the help. At the end of the day i decided to geta i5 3570K or a 2500K ( I heard the 3570 pushes alottt of heat which im not looking for, and a z77 motherboard.