Mobile Athlon XP tempatures compared to a desktop athlon of the same speed.

[coolred]

I am considering building another system with a mobile athlon XP(haven't picked a board yet, waiting to see prices after socket 939 comes out an dhopefully the nforce2 400Gb)inside an Antec Aria. I have heard that the aria has low air intake making it get somewhat toasty with soem systems. I knwo the mobile athlons run cooler then thier desktop counterparts due to the lower voltage. I would likely increase the FSB to 200Mhz, but other then that no overclocking, trying to keep it as close to stock voltage as I can.

I know this processor isn't at the top of the speed charts any more, so it liekly shouldn't pose a heat problem, but I just wanted to know for myself what temp differance there are between the 2. I'm not really trying to figure out how hot they run ina system, since that would be hard to find accurate info, unless someone tested both int he exact same system. Basically I just want to know what sort of temps they output, I would imagine this number is posted somewhere, mayeb on AMD's site, but I have no idea where to look exactly.

 

[VisableAssassin]

if they are both the same speed and hte same voltage they should be identicle unless your cooling different than the other.
they are both the same chip !
the only difference is the mobile silicon is the cream of the crop. its runs at the same stock speeds as the desktop counter part with less voltage.

 

[coolred]

Thanks, but as you pointed out, they are not the same chip, they have a differant voltage. Therefore the mobile should run cooler, I just want to know how much cooler

 

[Shimmishim]

Originally posted by: coolred
Thanks, but as you pointed out, they are not the same chip, they have a differant voltage. Therefore the mobile should run cooler, I just want to know how much cooler

maybe you're not understanding what he said...

if you run a mobile barton at 2.5 ghz and a desktop at 2.5 ghz @ the same voltage ie 1.75 lets say.. then temps should be the same... but...

if you run a mobile at 2.5 with 1.65 votls and the desktop one at 2.5 with 1.85 volts, the mobile will run cooler for obvious reasons...

but if the situation is reversed, the desktop would run cooler than the mobile....

it's all about clockspeed and voltage

 

[xroyal]

They got it right!

 

[coolred]

Oh no, I understood you guys, but I think you misunderstood me, and that is likely my fault for poor wording in the topic.

I meant say you have a mobile XP running at 2500+ at stock voltage and you compare that to a desktop 2500+ also running at stock voltage. The mobile will obviously be cooler since it has a lower voltage, how much cooler is what I am after.

 

[myocardia]

With high-end aircooling, there will be a 1-2° C difference. I don't know how much difference there would be with slower, less efficient coolers, though, since I have a Thermalright heatsink and a 92mm 119cfm fan.

 

[mechBgon]

Given the same overal clockspeed, I would expect the actual heat production to be proportional to the voltage, so divide the voltage of the mobile CPU by the voltage of the desktop CPU.

(granted, this is heat production in watts, not temperature, that I'm talking about; but I think it may be the more relevant thing to focus on, in the bigger picture)

 

[coolred]

Well according to newegg the mobile 2500 is 90 bucks, the desktop is 75.00, both OEM processors.

there will be a 1-2° C difference

I fthere is only a 1-2 degree differance then is that really worth the extra 15 bucks. I ask cause i want to build a system in an Antec Aria, which from reviews I have found out that it doesn't provide the greatest airflow and it is pretty quiet unless the PSU fan ramps up. I was hoping a mobile would help prevent the PSU fun from running high RPM's, but 1-2 degrees doesn't seem like it owuld matter much. Sure if its that 1 degree making the fan spin up, then it would, but that seems unlikely. I don't plan to overclock aside from upping the FSB to 200, but I woudl lower the mulitplier to compensate, so I coudl run stock voltage. I had planned on using a Zalman CNPS7000A-(Al)Cu heatsink. The reasont he AL is in perenthese is because I have heard it performs almost on par with the all copper model, but is quite a bit less weight. Thats assuming it won't interfere with a hard drive or anything, which I haven't heard of yet.