Pentium M 740 on Asus A6R problem

Hi,

I have a notebook Asus A6R B081 and it came with a Intel Celeron 1.7GHz CPU, FSB 400MHz.
Today I installed a Intel Pentrium M 740 1.73GHz CPU, FSB 533MHz and it works fine. The problem is that in Windows when I click Properties on My Computer it says "Intel Pentium M processor 1.73GHz 1.30GHz" (exactly like that).
I have a software that checks the CPU frequency and speed and it also says I have Intel Pentium M processor 1.73GHz but the speed is 1.30GHz (13x100MHz). I think it should be 13x133=1.73.
In BIOS setup it says I have a Intel Pentium M processor 1.73GHz, speed 1.73GHz but before it goes to BIOS setup I can see the hardware tests where it says Intel Pentium M processor 1.73GHz, Speed 1.30GHz.
This means my CPU doesn't work at 1.73GHz as it should, it works only at 1.30GHz. Does anybody know if I can fix it to work at 1.73GHz? Are there any jumpers on the motherboard to switch to make it work at 1.73Ghz?

Thanks.

 

Do you have memory that is capable of running at that FSB speed? Grab a copy of CPUZ, available here, run the program and go to the SPD tab. Check what your max bandwidth is.

There might be an option in the bios to switch the FSB to 133, although any motherboard from the last few years should do it automatically.

edit: also in CPUZ, check the mainboard tab, take a look at what chipset you are running, as Greg said could be your chipset does not support 533mhz FSB.

 

I'm thinking that the chipset is not capable of running a 533MHz FSB, as 1.73GHz * 400/533 = 1.3GHz. Download and run CPU-Z to get the FSB speed.

From what I'm seeing though, there is no way to fix this.

 

I think Greg is correct, use CPU-Z and tell us your chipset we can look up and confirm or not?

 

Hi, Thank you for your fast support.
I installed CPU-Z and I went to SPD tab. The max bandwidth is PC2-4300 (266MHz).
Chipset is ATI, RS400/RC400/RC410
Southbridge: ATI, SB400
My notebook came with 512MB RAM, 533MHz and I added another module with 512MB RAM, 533MHz some time ago.
In CPU-Z I can see at Memory tab: 1024MB RAM DDR2, DRAM Frequency 266.5MHz. Why doesn't it show Frequency = 533Mhz?

In BIOS I don't have an option to switch from 100 to 133MHz. Do you think that there may be a jumper on the motherboard to let me do that?

 

I don't have a firm answer yet, but can you tell me does CPU-Z say you have Dual Channel? If so you have RS400 if not RC410 or RC415. Also CPU-Z is reporting RAM speed correctly 266.5X2=533 Double Data Rate.

 

I don't have Dual Channel.
Under CPU tab/Clocks it says:
Core Speed: 1300MHz
Multiplier: x13
Bus Speed: 100MHz
Rated FSB: 400MHz
And I was thinking if it is possible to change the Bus Speed to 133MHz. The BIOS doesn't have an option for this. I don't understand why in BIOS I can see Intel Pentium M 1.73GHz, Speed 1.73GHz and before if goes to BIOS, when it makes the hardware tests, it says Intel Pentium M 1.73GHz, Speed 1.30GHz.

 

533mhz memory is ddr2, which is why your system reports your memory as 266Mhz. DDR2 is double data rate, so 533/2 = 266Mhz.

Have you tried going to the power options, and set it to always on or maximum performance?

You may be able to force your fsb up with CPU rightmark. It should allow you to force the processor to a certain multiplier, and it will allow you to set the voltage.

Also, try and see if ASUS has a bios update for your machine, it may give you 533Mhz FSB support.

K-TRON

 

Having trouble with that sentence. If you are saying it reports 1.73Ghz then tests and shows 1.3Ghz? I understand that, it at first reports what the chips ID code says, then it tests and reports what is actually happening. I also want to say if the BIOS reports 1.3Ghz then the suggestion of checking power settings will not (I think) work as it is prior to those OS functions starting. I should of made clear with my last post, I am assuming you have two matching sticks of RAM, yes? The chipsets support 533Mhz so the limitation is as K-T said BIOS? Or the MoBo or who knows. If you post back on your RAM config I will look further.

 

Thanks.

The Bios is very simple, I can't do too much in it, it doesn't let me change any power options. Can this options be changed on the mobo with some jumpers?

I already made a BIOS update. The BIOS update had this description "Set max memory clock to 266MHz for stability." Nothing else changed, only the version number

In that sentence I wanted to say that when the computer starts it makes some tests and display the CPU as Intel Pentium M 1.73GHz, Speed 1.30GHz, RAM memory ..., VIDEO memory ..., IDE 1 ... If I press F2 I go to BIOS it says Intel Pentium M 1.73GHz, Speed 1.73GHz. Why doesn't it say again Intel Pentium M 1.73GHz, Speed 1.30GHz or why does it say in the first place Speed 1.30GHz?
I have 2 modules/sticks of RAM:
1. Nanya 512MB DDR2, 533MHz, PC2-4300
2. Kingston 512MB DDR2, 533MHz, PC2-4300
Can they affect the speed of the CPU because of their frequency?
Thanks.

 

The processor itself has a "string" built into it that has basic info about it. Name, model number, stock frequency. That's why we're seeing 1.73GHz here. But the running speed is 1.3GHz.

If you were to look at the Properties page of My Computer, you'd probably also see the 1.73GHz/1.3GHz issue. My laptop, which states 1.2GHz, often runs at 800MHz and that shows up in My Computer as well.

BIOS isn't smart enough to calculate the CPU's running speed AFAIK, so its probably pulling the speed from the processor spec's embedded within the chip.

I found one document that hints that the top FSB speed may indeed be 400MHz.