I googled a little and from what I read, the max temp for the x1900 is 120c. which is way more than enough to burn your finger. reguardless that max temp, it still seems way to high to me. personally i would want to cool that thing down alot!!
you have 3 fans, but they won't do any good if your case isn't neat inside it. what I mean by that is, are your power and data cables hanging all over the place?
1. any unused power cables should be stuffed in an un-used optical drive bay or other out of the way location that doesn't block airflow.
2. replace flat ribbon IDE and floppy cables with rounded cables
3. all remaining power and data cables that are used should be routed along the case perimeter and not just hanging freely
the above steps will greatly increase the airflow inside your case, but reguardless of cable organization, there is still another problem common to most systems... the video cards heatsink is on the bottom of the card, and there is not entrance or exit for air in the area under the video card, so much of the heat generated by the card will just sit in that poorly ventilated space.
there are a few simple ways to help with that issue.
1. if you don't use need all the PCI/PCI-e x1 or x4 slots on your mobo, then in many cases (such as mine) you can remove the unused PCI slot cover plates and install an 80mm fan there, make it an exhaust fan to suck out the hot air from the video card.
2. if you dont have room for that, then consider a PCI slot fan (they sit horizontally and only use up 1 PCI slot)
3. if you still want more cooling, then consider an aftermarket air cooler, or for even better cooling consider water cooling it (you can buy cheap standalone video card watercooling units that would do a decent job cooling, alot quieter too
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