Well firstly do you have any warranty if so use it, if not are you willin to open yuor machine ad take a look. The Graphic card is a sealed unit with star type screws with 2 heat pipes coming offit one goes to the left fan one goes to the right fan so both fans are used to cool the GPU the cpu is only cooled by the left fan and its exhaust fins are closer to the fan so the gpu fans are taking air slightly warmed by the cpu on the left and strongest fan, i have a t2500 and it settles at around 45C with no fan at an ambiant room temp of around 20c with no load and the throttle @ 100C which it does tested with intel thermal analysis tool. the GPU however sits more around 65-70C under same conditions. the Nvidia driver beleaves it will throttle at 120C my card is a year and a half old and i have pressured it ofte and for long periods
and it will pop at around someware over 86C according to i8k.
But runs Track mania, Teamfortress 2 at native res ie under alot of pressure at core 600 & ram 800, though it is winter and i may need to claim on my warranty come the warmer months myself. luckily mine runs till 2010.
I took mine apart today its really easy and dell site has manuals. managed to put it all back together with no left over screws was proud of myself
although not filthy fans were skined with dense skin of dust hard to remove but you can remove fan units take them out chasis to clean the fins of the coolers on left were pristine but right had some thickish clumps of dust, its 3CFM (last pc i had i think the heat produced by the hard drives produced a natural convecton that produced more then 3 cfm lol
)5v 120ma fan! on the right so even a small blotch of dust or a thin layer of dust on the fan adding to weight is going to adversly effect cooling. Also Heat is a matter of what game yuor playing some will use parts of the gpu more intensley then others and some will light up the entire gpu same with cpu and lesser degree down the chain.
Another thing i found with I8K it kills yuor 3dmark score by hundreds if you monitor all yuor sensors etc, also it can leave the the fans idle when switching back to dell bios controll which dosnt kick in so have to watch that if using i8k and maybe other controllers.
you cant swap the fans round but you might be able to replace them they are standard 3 pin fans by the look of them but if you clean it so its nice and shinny the the air flow should be opimum get i8k away let dell bios controll thing if you over heat and are in warranty get dell techies to crawl all over it and do there work if not then you have to do somthing i havent open it up and maybe apply as5 and make a good connection else get use to i8k @ force fans on high and maybe underclocking or ebay.
of course there are cooling pads and if you covered all the bare metal in yuor laptop with non conductive compound you could use it in the fridge.
Ed. leaving it to the dell bios A07 seems flaky at best using i8k just too monitor is worrying but i am going to trust it no bsods yet but my peaks are cpu 76c(current 27/29c) GPU 84(67) memory 58(53) chipset 54 (46) HDD1 41(39) HDD2 32(28) fans @ 0 & 0 ! :/ - every 10C hotter a silcon device runs it takes a year off its working life or so the statistic goes with i8k cpu never went over 55 mind you CPus do seem to last well all mine have and theyve been oc'd and messed with.