DDR2 PC4300 RAM --- Intel Setup but a little confused. Need help.

Firegod

Firegod

Firegod

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I recently purchased some ram for a Vaio laptop from Crucial's website. Now the CPU is an Intel Celeron M @ 1.6Ghz. See CPU-Z screenshot below,

Memory_web_cpu.jpg


What I would like to know is why is the FSB at 100Mhz? Obviously this is 100x16 to equal 1.6Ghz, but 100Mhz on the RAM is way to slow?! Surely it should be at 266Mhz which is the default for the RAM?

Memory_web_spd.jpg


I'm a little confused as I own AMD setups, but why is the bus speed at 400Mhz? That to me is the Memory speed, i.e. PC3200. Yet the CPU is only running at 100Mhz?

What I would like to know is how to I get the CPU to run at 266Mhz with a Multiplier of 6. (266x6 = 1.6Ghz) As you can see below, the RAM is only running at 100Mhz. :eek:

Memory_web.jpg


Thanks for any help as it sounds to me that the bandwidth is really low, and I thought intel's needed more bandwith, but I'm baffled by how this all works and ties in. I have looked in the BIOS but there are no options for changing any settings. :(
 
Oh cheeky.... :)

The ram will be set in the bios. There may or may not be an option for ram speed in your laptop bios.... often there is not with laptops.

I'm afraid with a laptop its going to be a case of... take a quick look in the bios else contact the manufacturer. You need to check for Ram speed or ratio...

266Mhz DDR means an FSB speed of 133... you need to lock in the bios for a 266 or 133 or 3:4 ratio... something like that.
 
SimonMaltby said:
266Mhz DDR means an FSB speed of 133... you need to lock in the bios for a 266 or 133 or 3:4 ratio... something like that.
Click to expand...
It's DDR2, and it should be running at DDR533 (or 550??) A 2:5 divider or something like that.
 
Its different on Intels, the memory controller isnt on the cpu I think ? So its not bound to be twice as much like it is for AMD. (Though it can run async of course)
QDR I think means it will quad the fsb for the bus speed.

Your 100 ram speed is dam slow yes but how much bus speed can your motherboard take, the latest ones are like 1066 but maybe the older ones were half this.
Maybe you could run it async anyway and it'd be more beneficial then is the case for AMD.


Take the above with a crate of salt anyway since Iam guessing most of it :p :o
 
Should have probably mentioned the laptop in question is a brand new Sony Vaio VGN-FS315E model

MAINBOARD:
mainboard.jpg


Tryed the latest version of CPUZ and it reported the same numbers :(

Are there no programs I can use to unlock settings or even alter them?
 
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That looks correct to me. Remember on current Intels the Ram speed gets quad pumped so 4 x 100=400Mhz FSB. That 915 chipset on your mobo is probably the cut down mobo version so may only support an FSB400 max. On a desktop PC the 915 chipset will do 200x400=800FSB and may OC a little higher but not much as the 915 is a budget chipset.

All current skt775 Intels are 200x400=800FSB (except for the Extreme Editions which are 266x4=1066).

Even the new conroes are quad pumped so 266x4=1066 FSB.

Now you may get better performance if you can use an overclocking option in the bios so that you use the ram @ 266 but lower your CPU divider instead so the ram is @ 1:1. heat may become a big issue though...
 
Ahhh right, I think I'm starting to understand. So this quad business basically means even though its 100Mhz, technically its 400Mhz. And if there was a way to fiddle with the FSB and Multi I could in theory run 266x6 (266x4 = 1066Mhz memory speed)?
 
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