[Nikronius]

Hi guys Im the owner of a Intel Pentium dual core E2200 CPU with a Front Side Bus speed of 800mhz.

Im using pc-wizard at the moment and it says that the bus speed of the cpu is 200mhz, and it doesnt say 800mhz anywere else.

So the question is... is there a problem with my bus speed or front side bus and bus are different... and if there is a problem what can i do?

here are my specs:

Mainboard : ECS P4M900T-M2
Bios : American Megatrends Inc.
Chipset : VIA P4M900

Processor : Intel Pentium E2200
Frequency : 2200 MHz - (current : 1199.58 MHz)

General Information :

Real Frequency : 1199.68 MHz
Multiplier : 6x
Low/High Multiplier : 6x / 11x
Multiplier Locked : Yes
Marketing Frequency : 2200 MHz

Front Side Bus Information :
Bus Speed : 199.9 MHz
FSB Frequency : 799.8 MHz (QDR)

Initial Frequencies :
Frequency : 2200 MHz
Bus Speed : 200.00 MHz (QDR)
Multiplier : 11x

[mctw]

Intel processors use a system called Quad Pumping, basically means that your actual fsb is multiplied by 4 aka quad, to give you your effective fsb.

[rider200]

Hi Nikronius

This is what ECS says about your motherboard: FSB 1066/800/533 MHz
It also says: Support DDR2 667/533/400 DDR2 SDRAM

What type of ram do you have installed? If you have DDR 2 and it is FSB of 400 then it will show as FSB of 200. DDR 2 Ram is Dual Channel, each chanel is one half of the FSB. If you have DDR 2 that is say 533 then the FSB would be 261 give or take one or two. If how ever you had DDR 2 800 MHz FSB then it would show up as 400 MHz FSB.

My ASUS has two DDR 2 800 MHz 2 Gig modules, CPU-Z says my rated FSB is 400 MHz.

Now if I wanted to increase the FSB of the Ram I would get a coresponding increase in FSB for the processor.

Here is the rub - If you increase the FSB of the Ram you increase the FSB of all components on that bus, and the Ram is on the Main bus for the motherboard. So overclocking your Ram may give you a boost in clock frequency of the ram and the processor but it also overclocks any add-on cards, any embed devices that need the Main bus such as sound devices, USB, Network Interface, all of it. And the side effect if the devices still operate is Heat.

How do you get around this 'overclocking' and not burn up your computer? With adiquite cooling. If you are going to overclock the FSB be sure to increase the cooling before increasing the FSB.

Another way to bump up the modifier (this is locked by the manufacture) but it is a multiple of the FSB and the CPU frequency.

If you change your ram from DDR 2 400 to say DDR 2 800 you have in effect doubled the FSB on the memory and the processor, you have not doubled the FSB on the Main bus, you will have an increase in heat for both the memory and the processor but with adiquite cooling this can be accomodated.

I went from DDR 2 400 MHz 1 Gig modules (four of them) to two DDR 2 800 MHz 2 Gig modules. My FSB went from 200 to 400, my clock speed on my processor went from 2.4 GHz to 3.05 GHz, the modifier is locked at 9. My system increased 4* F in heat.

So to answer your question - There is nothing wrong with your FSB, it is being reported correctly. The CPU FSB will run at what the FSB of the memory is set for. As I said you can bump up the FSB of the memory but remember all the components on the Main Bus will also get that bump in FSB frequency and will produce a lot of heat.

Do a search for CPU-Z and see what it has to say about the CPU and Memory FSB.

MHO...

[Carbon]

Originally Posted by rider200

What type of ram do you have installed? If you have DDR 2 and it is FSB of 400 then it will show as FSB of 200. DDR 2 Ram is Dual Channel, each chanel is one half of the FSB. If you have DDR 2 that is say 533 then the FSB would be 261 give or take one or two. If how ever you had DDR 2 800 MHz FSB then it would show up as 400 MHz FSB.

This is incorrect. Dual channel only assigns a memory module to two different channels to improve performance, most notably on machines that don't even have a FSB, considering the goal is to increase bandwidth to the integrated memory controller which precludes the presence of a FSB.

My ASUS has two DDR 2 800 MHz 2 Gig modules, CPU-Z says my rated FSB is 400 MHz.

This is because the RAM does work on the rising and falling edges of the clock cycle, increasing its effective speed to 800mhz but its rated speed at 400mhz. This is also probably out of synchronization with the "real" FSB, since only processors with very low multipliers will ever hit a FSB of 400mhz.

Now if I wanted to increase the FSB of the Ram I would get a coresponding increase in FSB for the processor.

Not proportionally and not in your scenario. Since the RAM is at an unlocked frequency you could clock it to hell and back and you wouldn't have any difference in FSB speed or processor speed. The motherboard is compensating for the non-synced FSB whatever you do.

Here is the rub - If you increase the FSB of the Ram you increase the FSB of all components on that bus, and the Ram is on the Main bus for the motherboard. So overclocking your Ram may give you a boost in clock frequency of the ram and the processor but it also overclocks any add-on cards, any embed devices that need the Main bus such as sound devices, USB, Network Interface, all of it. And the side effect if the devices still operate is Heat.

The FSB is on the northbridge. All those other things are on the southbridge. There shouldn't be any difference in the clock frequencies of anything on the southbridge.

How do you get around this 'overclocking' and not burn up your computer? With adiquite cooling. If you are going to overclock the FSB be sure to increase the cooling before increasing the FSB.

Increasing a FSB without voltage changes doesn't usually increase heat by any substantial amount. Vcore changes do.

If you change your ram from DDR 2 400 to say DDR 2 800 you have in effect doubled the FSB on the memory and the processor, you have not doubled the FSB on the Main bus, you will have an increase in heat for both the memory and the processor but with adiquite cooling this can be accomodated.

I went from DDR 2 400 MHz 1 Gig modules (four of them) to two DDR 2 800 MHz 2 Gig modules. My FSB went from 200 to 400, my clock speed on my processor went from 2.4 GHz to 3.05 GHz, the modifier is locked at 9. My system increased 4* F in heat.

This won't happen in most cases because the FSB sync is based on the CPU's speed, not the RAM's. If it's unlocked, the CPU's speed will obviously not increase.