Windows 7: Only 100 megahertz???

I just got a new PC running Win 7 64 bit and the mobo is ASUSTeK COMPUTER INC. P8Z77-V LK Rev X.0x... but the Bus Clock is only 100 megahertz

It's got the 3.30 gigahertz Intel Core i5-2500K processor and 16gigs of DDR3 RAM, eventually to be upgraded to 32 gigs of RAM.

I've noticed my second computer (runs XP on purpose) that I just had rebuilt at a local computer shop (new mobo, quad 4 3.2 AMD processor) has a Bus Clock of 200 megahertz

My question is this... on my first computer, is there any way to increase the Bus Clock Speed to 200 megahertz?

Also, is there any advantage to enable hyper-threading?
I noticed both PCs have this disabled by default.

I use both for business purposes where I get busy running numerous applications at the same time.

2 Different chip types and 2 types of Tech

default fsb is 100 mhz intel AMD 200mhz


usually intel will be Oc'ed Multi same with amd but you can use a combination of fsb/multi

intel just multi from what i seen but not to sure havn't ran one in a while

Amd multi /fsb just depends on your target

OK, so with Intel processors having 100 FSB is normal?

I was just wanting to make sure I was not missing out on a teak that could be made to get better performance.

Increasing the Ram from 16 to 32 oughtta help increase performance, right?

increasing ram only increases performance if your computer uses all the ram you got allready, if not then its up to you, enabling hyper threading will increase performance by quite a bit, cant recall but i think it it 20% to 30%. all the current sandy/ ivy bridge have the bus clock of 100. you can increase it to a about 106-107 after that most of the time ur pc wont boot and you have to reset cmos

First off, the 2500K does NOT support hyperthreading.......you have 4 cores/threads. Leave Hyperthreading alone.

BCLK is 100MHz by default.....fiddling around with this number without knowing what it does is a recipe for disaster.

Here is a direct quote from a Z77 Overclocking Guide on BCLK:

I would generally leave this alone unless you absolutely know what you are doing. If you want to bump up performance of your CPU, it is unlocked.......you can change the multiplier and get a higher clock speed. I would hoever, read up on overclocking so you have an overall better experience.

If you would like a copy of the Z77 OC'ing guide, PM me and I will send it to you.

I would ditch the RAM upgrade and go with a nice SSD if you don't already have one in that machine. You will see a 0% gain with 32GB of ram more than likely. With an SSD, you will see an increase in performance every time you open up a program, install programs/applications, and starting up/rebooting. Single best upgrade there is, in my opinion.

agree with kbrady, i wasnt sure but i think only the i3 and extreme i7s have hyper threading is that correct?, also on socket 2011 it gives 100/166/266mhz fsb option + unlocked multiplier

I bought my new PC from Velocity Micro and they say it is a "3.30 gigahertz Intel Core i5-2500K processor Hyperclocked to 4.0 GHz"

Anyway to verify it is "Hyperclocked" to 4.0 GHz?
Is hyperclocking the same as overclocking?

I'm not looking to blow up my computer... I just want to get the best performance.

The 100mhz is the Base clock ratio.
This is the base clock speed EVERYTHING runs off of. The Chipset, PCI, etc ....

So by changing this, you not only increase the CPU clock speed, but the memory speed, PCI Speed, and so on. Everything connected to it goes up.
This is why everything can fall apart quickly when Overclocking here. Some systems can not handle it.

So, on the Intel to OC you use the CPU Multiplier to OC the CPU. Cpu multi * BCLK = Clock speed. I/E x44 * 100 = 4.4Ghz Cpu speed.
Everything else remains at default values.
For the RAm, its speed can be changed by directly setting its clock speed to 1333,1600,1866 etc. This will not effect CPU speed, chipset speed,or and other speeds. Only RAM.


Now, on Socket 2011, it works slightly different. Messing with the base clock still cause the same issue here as well, but the implemented the star which only effects the CPU/RAM together leaving the rest alone.


So the same formula applies, CPU Multi * base clock setting you are using. You may need to use lower multipliers. BUT, it also has a impact on the Memory speed, not just the CPU.

So lets say your CPU has a x35 multiplier, and you have the Memory set to run at DDR3 1600. Without making anyother changes, only changing the BLCK to 125 it would be:
RAM= DDR3 2000 CPU=4.38ghz

You need to be careful with this, and be sure you have the hardware to handle it.

Everything else runs at its default speed.
Im probably not describing it corrently but hopefully it makes sense.


In short ... Leave the BLCK alone. Use CPU multi, and direct RAM speed setting to OC.

For the record if you have RAm that runs at 1600-1866 or even 2133 .... Ocing it will not really make much of a difference. Just run it at its rated speed.
If you want to OC, just use the CPU multi only, and increase the CPU clock speed.

Do me a favor and download CPU-Z here....CPUID - System & hardware benchmark, monitoring, reporting


Instal that and post the results please.

OK, I did and here's the link...

CPU-Z Validator 3.1