jyjjy :
The basic principles I stated are entirely sound. Seriously, this is basic physics. Power cannot simply disappear, conductive materials or not if a card USES a certain amount of power it is, in the end, transformed into heat. Silver wires with current running through them do NOT use the power they carry and thus do NOT give off heat so it is entirely irrelevant. Video cards are not magical and cannot break the first law of thermodynamics.
As for the fan thing I stated the CARD creates more heat in total with the fan on than off and that is 100% true. That the fan creates an airflow that in conjunction with the case fans allows for the heat to be removed from the system more effectively does not change that THE CARD itself creates more heat. If the airflow in the case is good enough, then no, running your GPU at above 100 degrees should not affect the other components. In fact plenty of microprocessors come close to that as a normal operating temperature without cooking the entire system. How concentrated the heat is in the processor itself does not change the overall amount of heat the card gives off. How much heat it gives off is DIRECTLY related to how much power it uses and that applies to every electrical device in existence(minus the usually trivial amount of energy that is turned into light or sound in some cases) and you can argue with that all you want but you will be wrong.
First off passing current through any metal or conductive material will produce heat. How much is dependent on the resistance in the metal. Like I have stated before. This is specially true when using tungsten, and specially true when using silver as it will produce very very little heat. Also why we don't have a 100% electrically efficient power grid, because a good portion of the electricity is lost as heat.
Guess what is flowing through the GPU? Electricity. The only reason why GPU's produce heat is because of the resistance created while using the electricity. In turn electric energy converts into heat as the resistance of the electrons flowing through the metal causes friction. This is why any electrical device will give off heat. Now how much is concentrated, or what the surface area is also comes into point into how much heat the device will give off.
Yes in paper specs, more gpu's should survive over 100c+ at stock speeds, with max fan on. However in reality manufacturing defects occur, specially in microprocessors they're so small that even a .000010 cm offset could end up frying the GPU. Even some of the most precision cutting instruments (used mostly for steel precision cutting) have a .010cm variation (if i remember correctly).
Yes you are right that the fan in the GPU also helps the air flow in the case, which was where I was going with it. A card left without a fan to fry would produce higher heat in the case than a card frying with a fan for two reasons: Let's take a case without fans.
1. Air inside the case would be heated up, but without airflow the heat would remain driving heat to other components like memory, power supply, motherboard bridges, and cpu.
2. The high pressure caused by the heat would drive minimal colder air currents to go into the case, and out of the case. This airflow however is so minimal that it can be considered irrelevant as the minimal colder air would almost certainly be heated under a minute.
Now take the same principle I just discussed and add in case fans, but no GPU fan.
1. The gpu's surface area will not change, the only thing that will change is the airflow on the case being lowered.
2. The air inside the case will get hotter because while the joules (heat) are the same coming from the GPU there is no fan there to dissipate the heat from the heatsink. Since the heatsink is still present the surface area in the heatsink is the same, thus giving off the same amount of heat outward. Without adequate air flow to remove the excess heat, the case temperatures would increase. Even the most popular case the Antec 900 would be able to push the air out, and in fast enough to cool the temperature inside the case.
As you can tell the real killer isnt so much the GPU, but the lack of air flow.
I wish I could do testing on my GPU, but unfortunately it's a blower style fan.
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