Ram upgrade to 2GB - fan running faster

I have just upgraded my intel mac mini from 512 MB to 2 GB using a kingston upgrade kit (KTA-MB667K2/2G).
The system is performing a lot better but there is an annoying "trouble": when 2 GB are installed the fan is running more fast and more often then with 512MB.
During my tests, I have see that while using OS X the system is able to regulate the speed, it goes from very slow to very fast but it moves to fast more often then before and the system is definetly making more noise.
The bigger problem happens when booting using windows XP: when 2 GB of RAM are installed the fan is always running at top speed or near to top speed.
That is not happening while using the original 512 MB.
I have tried to reset the SMC by using the apple istructions here:
http://docs.info.apple.com/article.html?artnum=303446
but it didn't make any difference.
I have double checked all wires,I have switched from 512MB to 2 GB and from 2 GB to 512MB three times(!) but nothing has changed:
- when using 512MB fan runs slow;
- when using 2 GB fan is still able to change speed but is running fast more often.
Further more, to test, I have also left disconnected the fan speed cable in the front side, and in such way the fun starts at max speed and runs at fast speed all the time. So it is not a trouble with such connection.
Is that normal this behavior?
Does anybody have noticed any fan speed difference after RAM upgrade?
About BootCamp and XP running fan at max speed, could be that reinstall them could solve the "always on" fan trouble with 2 GB?
Thanks a lot for any help.

I have some updates about the problem.
I was thinking that it was a my fault about some missing setup needed when installing more ram to mac mini.
So, today, I have moved to a local apple center and I have asked them to install the RAM for me... they do, and it happens the same thing: the fun was running very fast quite often under OS X and was always fast under bootcamp-XP.
I have asked them why this happens and if that was normal, but they have no other mac mini with such amount of ram and they never see it before. They suggest me to test it for a week and eventually to give them the mac for a day to make some hardware tests.
Later, back into my office, the noise was too high and too annoying so I have called again apple to explain the situation.
They told me that they have no reports about similar problems, that it should not make more noise when adding RAM. They suggest me to try remove and reinstall better the RAMs or to try different RAMs (I am using kingston kit KTA-MB667K2/2G).
So I have also phoned to kingston support, and they say that it is a strange bahavior, that they don't have reports about that too. They are now investigating the problem and they let me know something in next days.
They also put to my attention the fact that the computer is able to see and work well with the 2GB memory, so the memory is working correctly. They think this is something related to apple hardware/firmware and could be that apple should fix it in next realases.
Unfortunatly, all this new infos and all the time lost for a "simple" memory upgrade didn't solve my troubles and I still cannot use the mac like I need.
So I have continued my tests by changing the kensington Dimms with other 2 GB dimms by Nanya technologies that were installed on my centrino duo notebook.
Mac mini was able to see and work well with them too, now the fun speed is a little bit slowly then using kingston ones but still more fast than with 512MB.
Bootcamp-XP is still not usable due to high fan speed and the high noise. OS X seems to control better the fan speed but it goes high there too for any little thing you do.
So I have made one more test suggested by kingston:
I have started mac mini while only one kingston dimm were inside.
In this way the mac mini was making some less noise that using the two nanya dimms, but it was still to high.
The last test I made was to check the cpu temperature with different amounts of RAM and results were interesting.
Using OS X with 512MB, the cpu temperature is about 33 C while iddle; if I try to start parallels desktop with guest windows XP, temperature goes up to 40 C and the fan is still running at quite low levels.
Instead, while 1 GB of RAM was installed, cpu iddle temperature was 35 C and starting parallels desktop will result in temperature levels till 50 C.
So there was a difference of about 10 C.
While doing these test I have left the mac mini open, so once stopped, I was able to quickly feel the RAM temperature with my finger and it was quite hot.
I didn't try temperature with both 2GB dimms, but I belive it will be surely more high.
So what I am thinking now is that probably apple is aware about higher temperature inside when using more RAM, so the bios starts the mac mini with the fun running faster because it detects the 2 GB memory.
OS X is able to control someway the fun so it is not always running fast (but quite often) while using boot camp with XP becomes impossible due to the fan always at max speed.
I don't think apple's rams could work at lower temperature than kingston ones, so the dubt now is that things are correct in this way.. so intel mac mini with 1/2GB could be a shame due to high level of fan noise... or... my mac mini has something wrong.
Is anybody here with a mac mini and 2 GB of RAM?
Anybody could make some test about that?
Thanks a lot for any help

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    87     CVMCompiler               _cvmsroot  0,0      3,8 Mo          2,34 Go         
    92     networkd                  _networkd  0,0      1,0 Mo          2,33 Go         
    94     SystemStarter             root       0,0      1.004 Ko        2,33 Go         
    96     rpcsvchost                root       0,0      2,8 Mo          2,35 Go         
    102    aosnotifyd                root       0,0      5,1 Mo          2,35 Go         
    103    socketfilterfw            root       0,0      3,6 Mo          2,35 Go         
    109    HDDFanControlDaemon       root       0,0      4,4 Mo          2,33 Go         
    110    ocspd                     root       0,0      3,7 Mo          2,35 Go         
    125    nmpppstatsd               root       0,1      272 Ko          585,6 Mo        
    135    logind                    root       0,0      1,8 Mo          2,33 Go         
    139    racoon                    root       0,0      2,2 Mo          2,33 Go         
    140    launchd                   _securitya 0,0      796 Ko          2,34 Go         
    142    CVMCompiler               _securitya 0,0      22,4 Mo         2,36 Go         
    146    xpcd                      root       0,0      4,5 Mo          2,33 Go         
    148    coreaudiod                _coreaudio 0,0      6,5 Mo          2,34 Go         
    149    com.apple.speech.synthesi root       0,0      4,2 Mo          2,33 Go         
    150    FanControlDaemon          root       0,0      2,1 Mo          598,4 Mo        
    152    launchd                   MacBookPro 0,0      1,3 Mo          2,34 Go         
    155    UserEventAgent            MacBookPro 0,0      9,4 Mo          2,37 Go         
    156    distnoted                 MacBookPro 0,0      3,2 Mo          2,35 Go         
    159    cfprefsd                  MacBookPro 0,0      4,8 Mo          2,34 Go         
    163    pboard                    MacBookPro 0,0      932 Ko          2,32 Go         
    168    usernoted                 MacBookPro 0,0      3,5 Mo          2,35 Go         
    170    storeagent                MacBookPro 0,0      7,3 Mo          2,36 Go         
    171    tccd                      MacBookPro 0,0      3,2 Mo          2,35 Go         
    172    pbs                       MacBookPro 0,0      4,4 Mo          2,34 Go         
    173    Safari                    MacBookPro 0,0      58,0 Mo         3,49 Go         
    175    iTunes                    MacBookPro 3,4      133,5 Mo        3,65 Go         
    177    Dock                      MacBookPro 0,0      44,9 Mo         2,43 Go         
    178    talagent                  MacBookPro 0,0      7,2 Mo          2,37 Go         
    179    SystemUIServer            MacBookPro 0,0      20,1 Mo         2,45 Go         
    180    Finder                    MacBookPro 0,0      51,2 Mo         2,51 Go         
    183    fontd                     MacBookPro 0,0      5,6 Mo          2,36 Go         
    184    CalendarAgent             MacBookPro 0,0      15,0 Mo         2,36 Go         
    186    filecoordinationd         root       0,1      2,1 Mo          2,33 Go         
    187    CVMCompiler               MacBookPro 0,0      22,4 Mo         2,36 Go         
    188    NetworkBrowserAgent       MacBookPro 0,0      2,6 Mo          2,33 Go         
    189    CVMCompiler               MacBookPro 0,0      25,9 Mo         2,36 Go         
    190    Contenu web Safari        MacBookPro 0,2      116,0 Mo        3,55 Go         
    192    Centre de notification    MacBookPro 0,0      16,4 Mo         2,40 Go         
    193    xpcd                      MacBookPro 0,0      5,9 Mo          2,35 Go         
    194    com.apple.dock.extra      MacBookPro 0,0      15,6 Mo         2,38 Go         
    195    accountsd                 MacBookPro 0,0      5,2 Mo          2,35 Go         
    197    Mail                      MacBookPro 0,2      137,9 Mo        3,60 Go         
    200    librariand                MacBookPro 0,0      8,6 Mo          2,36 Go         
    201    imagent                   MacBookPro 0,0      5,8 Mo          2,36 Go         
    202    ubd                       MacBookPro 0,0      12,4 Mo         2,36 Go         
    205    imklaunchagent            MacBookPro 0,0      3,3 Mo          2,34 Go         
    206    com.apple.iCloudHelper    MacBookPro 0,0      5,9 Mo          2,35 Go         
    207    Dictée                    MacBookPro 0,0      12,8 Mo         2,38 Go         
    208    lsboxd                    MacBookPro 0,0      2,7 Mo          2,35 Go         
    209    AppleIDAuthAgent          MacBookPro 0,0      1,9 Mo          2,33 Go         
    210    cookied                   MacBookPro 0,0      1,5 Mo          2,33 Go         
    212    syncdefaultsd             MacBookPro 0,0      12,5 Mo         2,35 Go         
    221    SyncServer                MacBookPro 0,0      9,7 Mo          2,36 Go         
    225    mdworker                  MacBookPro 0,0      10,0 Mo         2,36 Go         
    226    iTunes Helper             MacBookPro 0,0      4,0 Mo          2,40 Go         
    227    com.apple.PassXPCService  MacBookPro 0,0      6,7 Mo          2,35 Go         
    234    mdworker                  root       0,0      9,3 Mo          2,34 Go         
    236    WebKitPluginAgent         MacBookPro 0,0      940 Ko          2,34 Go         
    247    helpd                     MacBookPro 0,0      2,1 Mo          2,35 Go         
    250    AirPort Base Station Agen MacBookPro 0,0      1,9 Mo          2,33 Go         
    252    SyncMateServer            MacBookPro 0,0      13,5 Mo         2,38 Go         
    254    PenTabletDriver           MacBookPro 0,0      9,5 Mo          2,39 Go         
    259    Mac_SwapperDemon          MacBookPro 0,0      3,5 Mo          636,1 Mo        
    260    1PasswordAgent            MacBookPro 0,0      12,9 Mo         2,38 Go         
    262    netsession_mac            MacBookPro 0,3      12,4 Mo         766,4 Mo        
    266    TISwitcher                MacBookPro 0,0      5,7 Mo          2,37 Go         
    269    AppleSpell.service        MacBookPro 0,0      2,4 Mo          2,35 Go         
    273    ConsumerTouchDriver       MacBookPro 0,0      7,1 Mo          2,37 Go         
    275    TabletDriver              MacBookPro 0,0      5,9 Mo          2,38 Go         
    278    Moniteur d’activité       MacBookPro 12,6     20,9 Mo         2,45 Go         
    280    activitymonitord          root       5,0      1,4 Mo          2,33 Go         
    282    mdworker                  MacBookPro 1,9      5,9 Mo          2,34 Go         

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