Well there is no way you can run a gtx with a 90 watt PS It will 1. overheat your GPU because the video card will try to request more power and there just is not enough juice there so you will see your temps start rising. When i had my 7800 go in and flashed the bios from 1.1v to 1.3v i could get the gpu up to 400-475Mhz but the temps went to 93 degrees and then the threshold would slow it down, and the fastest stable memory i could get was 950, anything faster would make the games just slow down then the system would freeze. The most stable clock i could get with the 90w was 375-385MHz core & 900-950MHz memory. Once i bought the 130watt i flashed my 7800 with the gtx bios and ran 475/1250 at 93' full load which is fine. As long as it stays below the 95' for the 7800 go it was fine.
As for the battery being a 6 cell Im not sure if it would work or not if it does its not gonna last you too long, gaming atleast. But during normal 2-d windows the card runs at 1.1v so you might get away with it. I Found an extra real brand new dell 9c for $69.95 on ebay aswell, and i was able to buy a brand new Dell brand 130w PS for $19.95 on ebay, so you can imagine the 90w arent worth much, i didnt even try selling mine i just gave it to my girl to use as a back-up for her 9300, hope this helped
By the way be ready to sweat bullets putting in the GTX cause you need to bend the pipes a little and remove a few fins to get it to fit, but when you do it you'll be glad you did, it was easy to open and work on these dell laptops. I dont know about the 9300, but the 9400 i had to cut a metal support peice which was sodered to the mobo,+ i put a new CPU in and that was easy too! good luck
Desktop Rig: AMD Athlon64 x2 4400+\2GB DDR-400 Platinum EL 2-3-2-5-1t\ATI Radeon X1800xt(690/1600)\Maxtor SATA 7200 120GB\Maxtor SATA 7200 160GB\Mad gog 6in1 DVD Burner\Lite-on Combo Drive\KDS Rad-9p LCD <?xml:namespace prefix = st1 ns = "urn:schemas-microsoft-com[IMG] /><st1:metricconverter ProductID=[/IMG]19”</st1:metricconverter>
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you're welcome.. now shoot out some reps.. [IMG] /><
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how big of a power supply do you have? to run at anything above 380-390 core you need 130W... otherwise the 90W will shut down from too much power drainage and yuo'll end up running on batteries...</div><!-- / message --><!-- sig --><div>__________________
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Laptop: E1705\T2500\2GB DDR2-667\7800Go GTX (450\1200)\100BG Hitachi SATA 7200\WXGA+\SB Audigy HD\Intel Pro WI+Bluetooth (Dell Outlet $948 Previously ordered mint condition)<!-- / message --><!-- / message -->