View Full Version : Centrino CPU Question / Dell model question
Foxie3a
02-12-05, 04:01 AM
Going to build a Dell from the ground up.
I was debating between P4-M and P-M, but considering you need the P4-M at around 2ghz to be worth it the Centrino is almost at that speed anyway, so might as well go Centrino.
What the the model numbers for low/medium end dell centrino laptops?
Do the motherboards support both Dothan and the first core? What is the first core's name? What speeds do the first core and Dothan range at? If it could be done I wouldn't mind putting the slowest Dothan in an older Centrino laptop.
What do you think?
the perfect laptop for mid/low end is the I8600... to gaurentee that your comp be compatible with Dothan cpu (if u decide to start with bianas) you will need to specifically request that the laptop come with zero parralel or serial ports to gaurentee upgradeability to dothan. or you could get a low end dothan right off the bat an not worry bout it later. this laptop is very good because you can upgrade it To a high-end 2.1ghz dothan chip (which performs better than a 3.0 ghz p4 and will get twice the battery life than with the p4).
Foxie3a
02-12-05, 07:24 AM
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=38121&item=6743303533&rd=1
Is 725 the socket? The Dothan is 755 I think, so that would make this one Banias, but they're stopped selling Bianas by now I'd think. It has no serial/paralled ports on it. So there are two main revisions of this laptop Banias and Dothan.
Is there too much of a difference between the two cores? I'm figuring I'll get something around 1.4ghz/1.5ghz, so mhz for mhz, is Dothan worth it to spend a lot more on it? I'm thinking I can't afford a Dothan, so how about these D*** series by Dell? I take it they're Banias ones. Should I focus on those?
@crilicM@n
02-12-05, 03:00 PM
Dell D810 may use the new sonoma plataform with the katest 2,13ghz Dothan Processor, using Duuuuual channel DDR2 I sayd 2222222222222222222222! I īve seen some comparissons with the same speed PentiumM with the 400 bus and the 533 bus... the latter ouperformed for a good margin the first... paired with dual channel ddR2, it is the most sweetest notebook you can get... Even mooore work per cycle done....
@crilicM@n
02-12-05, 03:02 PM
buy the cheapest Dothan 2mb cache pricessor you can afford,... The m730 is a 1,6ghz with 2mb cache L2 and 533mhz bus!
buy the cheapest Dothan 2mb cache pricessor you can afford,... The m730 is a 1,6ghz with 2mb cache L2 and 533mhz bus!
so the 730 is Dothan for sure?
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&category=38121&item=6743303533&rd=1
Is 725 the socket? The Dothan is 755 I think, so that would make this one Banias, but they're stopped selling Bianas by now I'd think. It has no serial/paralled ports on it. So there are two main revisions of this laptop Banias and Dothan.
Is there too much of a difference between the two cores? I'm figuring I'll get something around 1.4ghz/1.5ghz, so mhz for mhz, is Dothan worth it to spend a lot more on it? I'm thinking I can't afford a Dothan, so how about these D*** series by Dell? I take it they're Banias ones. Should I focus on those?
I have a bianas in my comp and i have talked to 2 tech support people from dell and they bolth say my lappie can take bolth bianas and dothan becaue of the fact that i got the revision that dosn't have those specific ports because it's a different mobo that supports bolth of em.
you are getting Dothan mixed up with sonoma which is a 533mhz processor and is very expensive processor cauz it's new. bianas and dothan are about the same price at the same speed.
the only noticable difference between bianas and dothan is 1MB cache vs 2MB cache.
the numbers you are mentioning 725 vs 755 are not socket types. but proccesor numbers. all pentium-m processors use socket 478. it just depends on the motherboard weather the bios has ability to see extera cache. numbers ending in o are sonoma chips which are not compatable with bianas/dothan. numbers ending in 5 are bianas/dothan chips with the exception that bianas only goes up to 1.7 ghz. numbers ending in 3 are bianas/dothan low voltage chips and numbers ending in 8 are sonoma low voltage chips.
Foxie3a
02-12-05, 05:32 PM
You see, "Centrino" was all anyone knew before. No one new the core's name, it was all just "Centrino"....Then P-M came into play and everyone thought that was a P4-M.... I'm here thinking I'm so upto date knowing about the Dothan, and you're telling me they have yet another core called the Sonoma. Well I'll tell you something, there is no way I can afford a P-M that has anymore than 100mhz FSB.
I'll look into different Dells, thanks. :)
You see, "Centrino" was all anyone knew before. No one new the core's name, it was all just "Centrino"....Then P-M came into play and everyone thought that was a P4-M.... I'm here thinking I'm so upto date knowing about the Dothan, and you're telling me they have yet another core called the Sonoma. Well I'll tell you something, there is no way I can afford a P-M that has anymore than 100mhz FSB.
I'll look into different Dells, thanks. :)
LOL...if it's any consolation, it's all new to me too. :p It's a brave new world...upgrading and modding laptops.
How long before one of us gets the bright idea to start taking chunks of copper and making high end heatsinks for them?
Watercooling for them is closer than you think.. ;) I've personally been beta testing a block small enough..it's just a matter of pump and radiator size/weight.
Wait a minute... Centrino != Pentium M??
EDIT: Intel Centrino Mobile Technology Technical documents (http://www.intel.com/products/notebook/centrino/documentation.htm) then you click on See all Technical Documents for the IntelŪ PentiumŪ M Processor (http://www.intel.com/design/mobile/pentiumm/documentation.htm), and it all of a sudden becomes "Pentium M." What gives?
^^^^^ The penium-m is the name of the cpu and centrino is the name of the platform....
For a comparison an AMD Barton is the name of the cpu and the N-Force 3 is the name of the platform.
looks like I Am going to have to make another stickey... THE TRUTH ABOUT CENTRINO AND THE PENTIUM-M :)
Yep, I have a i8600 with a 1.6 Ghz Dothan. It became a Centrino set up when I had the cpu, the 855 intel board, and the Intel integrated wireless installed on the lappie. Otherwise it would be a P-M dothan on a 855 chipset lol :D Centrino is just a special name for a efficient platform that Intel makes. I love my i8600 though. Just a hint, buy 256 Mb of ram and then buy a gig from Newegg and install it yourself if you want 2*512. I bought a gig for 160 there which is a lot cheaper than Dell's offer and you can sell the 256 for extra cash afterward lol :D
Ah I understand now.. so what makes it a Centrino is that it is a Pentium-M combined with the 855 chipset PLUS integrated wireless?
Is that the latest chipset that Intel has for laptops? I am assuming that's what can be found in most Pentium-M laptops (segar, Dell, Compaq, etc)? Am I right?
That's what Intel says:
http://www.intel.com/products/notebook/centrino/index.htm
Here's a CPU-Z screenie for you to stare at. Really odd but for some reason my lappie is running at 1.6 Ghz on battery..............really weird. But anyway, that's the info that would be displayed normally when you are plugged in. On battery it runs at 100*6 at some rediculously low voltage.
http://img.photobucket.com/albums/v256/enduro/Dothan855.jpg
^^^^^^ you can change the settings to get it run at 1600 or 600 depending on the circumstancs. most people don't know this but the settings are actually built into the windows power settings... it dosn't seem obvious at first but then u will notice that your lappy has a ton more power settings than a normal desktop. those settings change how the speedstep behaves.
Yeah, but I haven't been messing around with the power settings and usually it runs at 600 on battery......... and cpu usage was at 12-20% max. Hmmmmmm.
THat's interesting. when you only run at 600mhz on battery and you just surf the web or write word documents and such, so you ever feel a lack of power? Also, I notice that you have the 400mhz bus model (725), would there be noticeable difference if you had teh 533mhz model (730)?
Nope, it surfs the internet just fine. Don't even notice a difference really. Access to My Computer and My Documents slows down a lot but other than that I don't notice too much of a difference. I've only tried gaming on batteries once and it did really well then. High cpu usage jumps the multiplier back up.
Not sure on the 533 but I'd guess that it might help a bit. I've never used a Pentium before so I'm not sure if changing the fsb but not the ram speed changes the data throughput......... on AXPs you're running 1:1 but these lappies run a ratio so I'm not familiar with the performance changes.
^^^^the speedstep technology can switch frequencies in less than 1 millasecond and as long as u had the settings on a normal setting it will switch to a higher speed the moment it's demanded. the power will be there when you demand it. think of it as cpu cycle conservation :) as for the performance diff between 400 and 533 mhz and the answer to that question lies with the p4 2.4ghz procssor. the 2.4ghz p4 processor is the only processor that was offered with all three bus speeds (400,533,800) and with my own personal experience it did enhance performance of the whole system. I would say that a 1.8 with a 533 would be about equivilant to a 2.0 with a 400 bus because ddr2 and pci express kinda come with the 533 bus and thus thereare some rally noticable gains to be had... one point i would like to make though... you will never notice a performance difference with notepad... you can have a 300mhz computer or a 3 ghz computer it still types at the same speed :)
Slackfumasta
02-14-05, 04:04 PM
It seems to be a common misconception that a processor with SpeedStep is always clocked down when on battery.
Your processor will jump it's speed up when it needs to even if you are on battery. Use something like MobileMeter and you can see the effect right away, battery or not.
Yeah, I know it jumps up when you are doing something................ but that's what I'm trying to say. I wasn't doing a single thing. I opened up CPU-Z and watched it for 3 minutes at least and it stayed at 1600 Mhz.............
Although come to think of it, I was messing around with CPUMSR the other day...........although I restarted since then so it shouldn't be affecting it still........ hmmmmmm.
Foxie3a
02-14-05, 06:48 PM
So we see what Dothan can do with SpeedStep, but is Banias just as efficient?
By the way, do you know what voltage it is that it goes down to when at 100x6?
http://img.photobucket.com/albums/v256/enduro/Dothan600Mhz.jpg
So we see what Dothan can do with SpeedStep, but is Banias just as efficient?
By the way, do you know what voltage it is that it goes down to when at 100x6?
i have a bianas and which is very efficent.... i have a 3rd party program that decreases the speedstep speed even more... whilest idleing my processor can drop down to 200mhz which is really weird cause intel says the min speed is 600mhz but i guess it's the 3rd party program that does it. it's called speedswitchxp and i also run another i8kfangui.
as for the voltage i think it can drop down to half voltage but i would need to check itel's white papers to be sure.
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