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malmental
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Upgraded cpu same class, now fan hits high more frequently

Watching a full-screen video (on-line) for long periods of time with no problems, not even fans kicking into high, nothing. Upgraded my cpu, I went from Athlon X2 3600+ (1.9Ghz) Brisbane 65nm to a Athlon X2 4800+ (2.5Ghz) Brisbane 65nm, AM2 socket.

I wiped off OEM heatsink and reapplied new compound and installed new processor, made sure I re-installed firm and securely, then I cleaned fans and motherboard with compressed air. Next I also installed a 5.25" bay cooling fan system. My computer isn't crammed in a corner or up against the wall, nicely ventilated area I think.
Anyways, going back to to the full-screen video (on-line) and now less then 10min of video, the fan starts slowly to take off like NASA preparing for flight.

What gives.? I was told by numerous sources that the OEM heatsink will work.
Is there something I'm missing.? Please hit me with your troubleshooting best, it can be done.!!
Thanks in advance.

Dell E521 - Athlon 64x2 6000+ (3.1Ghz) - Noctua NH-U9B - Artic Silver 5 thermal - 4GB Elpida DDR2 PC2-6400 - 2 Seagate HDDs= 240GB - PNY nVidia GT240 - Asus DVD+/-RW 24B1ST - 5.25" twin fan case cooler - 2 Dell 1905FP moniotrs - Windows 7 Ultimate x32

Dell D620 - Intel C2D T7200 (2.0Ghz) MEROM - 3GB DDR2 PC2-6400 800mhz - nVidia Quadro NVS 160M - NEC DVD +/-RW 8x - 9 cell batt - laptop cooling fan - Windows 7 Ultimate x32

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malmental
1 Nickel

Re: Upgraded cpu same class, now fan hits high more frequently

After doing more research both on-line and them physically testing myself, I've come to the following conclusions:
Aftermarket fan+heatsink combos will not work on a Dell. Dell alters their motherboards physically and also locks them from overclocking in BIOS.
So no matter what high of an upgrade, you will have to use the oem heatsink that came initially with the unit.
For the first processor upgrade, I used Ceramique by Artic Silver thermal compound and like stated above, case fan would come on after some video.
For the second processor upgrade, I used Artic Silver 5 high-density w/ polysynthetic silver; system runs like normal with NO fan acceleration..
Artic Silver 5 makes the difference, so now I'm going to sell the aftermarket fan and sink and upgrade the video card.
Peace..

Dell E521 - Athlon 64x2 6000+ (3.1Ghz) - Noctua NH-U9B - Artic Silver 5 thermal - 4GB Elpida DDR2 PC2-6400 - 2 Seagate HDDs= 240GB - PNY nVidia GT240 - Asus DVD+/-RW 24B1ST - 5.25" twin fan case cooler - 2 Dell 1905FP moniotrs - Windows 7 Ultimate x32

Dell D620 - Intel C2D T7200 (2.0Ghz) MEROM - 3GB DDR2 PC2-6400 800mhz - nVidia Quadro NVS 160M - NEC DVD +/-RW 8x - 9 cell batt - laptop cooling fan - Windows 7 Ultimate x32

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