Desktop vs. Mobile Core 2 Duos on notebooks?

So, I understand that, besides the mobile-based Merom Txx00 line, it is also possible to get notebooks with desktop-based Conroe Exxx0 processors.

1)How do they compare in terms of performance, heat, power consumption and cost?

2)When would you recommend which line?

Thanks in advance.

 

1. Desktop CPUs are going to be faster without a doubt. However, sacrafices must be made for speed, which includes heat, battery life, etc.

2. Mobile CPUs for laptops, Desktop CPUs for desktops. Unles you need a blistering fast CPU for games on your laptop, you should stick with mobile CPUs.

 

Same, I think the c90 is getting something like 30 minutes unplugged. I say if you are getting a laptop, in most cases it for portability. WHich is kinda moot if you go that big. And yeah, there are exceptions and people who just need that.

 

I checked the Intel site to compre specs on the desktop vs. laptop cpu's.
I'm definitely going with the laptop cpus for battery and heat reasons. But I got a ?

For instance, a T7200 is 667 FSB and T7300 is 800FSB, both are 2GHz.
Yet most of the laptops I see using a T7300 are using 667 memory modules.
So if I can get a T7200 for a little less than a T7300 I should do that.
I understand it is better to get a 4mb cache version over a 2mb one, but the faster FSB may not matter.

Unless I'm going to OC (not in this laptop as it's for son to take to college) or upgrade the memory to 800mhz (unlikely as I'm getting 2GB and unless 800mhz ram drops to pennies I couldn't afford to throw the 2GB 667 away!)

Am I missing something?

 

The memory MHz doesn't affect the processor's FSB speed or anything like that if you are wondering. The Core 2 Duo isn't memory bandwidth dependent like the Pentium 4 so I wouldn't worry about the RAM speed. 667MHz memory is more than enough to saturate the C2D's FSB.

 

No, I know the MHz doesn't affect the FSB, just wondering why an 800MHz FSB on a CPU if most manufacturers don't use it!

And why get a desktop CPU that's 1066MHz FSB. If 2GHz is 2GHz and not FSB dependent and you use 667MHz memory in both anyway, what's the glamour in a desktop CPU in a laptop? Just because you can get slightly higher GHz in a desktop CPU? A T7700 maxes out the laptop versions at 2.4 GHz,800FSB and a E6700 is at 2.66GHz, 1066FSB
Desktop specs
http://www.intel.com/products/processor/core2duo/specifications.htm
Laptop specs

http://www.intel.com/products/processor/core2duo/specifications.htm

 

The current Intel mobile chipset 965PM/GM only supports memory upto DDR2 667. So,there is no real point in using DDR2 800 memory. There is very little difference in terms of performance between the T7300 & the T7200 but the T7300 gets a new chipset, integrated graphics card(X3100) and also better deeper sleep states and few other power saving features. There are also a few other optional feaures like Robson which are only available with the newer Santa Rosa based systems. I would suggest looking at the whole package instead of just the processor when comparing the systems.

As far as the desktop cpu's are concerned, they are a little bit cheaper compared to the mobile counterparts and since they are mostly used in a desktop replacement style notebooks the extra weight(due to the bigger cooling solutions), poor battery life are not too important. These things exist for people who want a portable desktop which they dont move often but do take it out once in a while. Another point in favor of the desktop cpus is that you also get the option to upgrade to quad core or the extreme series processors which are not currently available in the mobile series.

 

Wait, I just noticed that at GenTech ( http://1toppc.com/Merchant2/merchant.mv?Screen=PROD&Product_Code=C90S&Category_Code=Notebook) all the RAM options are 667Mhz, regardless of the CPU's FSB. So, when getting a Conroe, you really can't use the 1066Mhz bus entirely?

Argh. If that is so, then Conroe really don't have any technical advantages over Merom. So Merom can match the Conroe options all the way up to 2.4Ghz (except E6700) AND they don't consume as much power?

So, taking into consideration a 667Mhz limit on FSB for the Conroe, then is a Merom 2.4Ghz pretty much equivalent performance-wise to a Conroe 2.4Ghz? I guess that is what I want to know. If they're equivalent, then maybe I'm better off going Santa Rosa.

 

The ram will be running a slower fsb, the cpu wont it wil still be running its full 1066mhz fsb glory. Trust me when I say the performance is still far above santa rosa. When c90 owners take over the wprime thread with all the top marks for notebooks it will be pretty obvious

 

Yeah, there's definitly more to it than just plain processor speeds.

 

Actually the Desktop Conroe will max out with the X6900 processor 3.2Ghz Core 2, vs the Santa Rosa X7900 2.8Ghz.