Originally Posted by
massman
You're right, but it's not really relevant to this discussion. This discussion is about the necessity for ultimate PWM designs with regards to product line. As Sin stated, vendors tend to over-engineer the entire product line meaning, for instance, elaborate PWM designs as well as extensive BIOS options. The vast majority of the users will not need that.
The data acquired from the HWBOT database shows a trend of an inceasing amount of overclockers using extreme cooling. Although this is, of course, a market trend in a niche market, it means that there's an increase in demand for products pushing the hardware to the absolute maximum performance, including the elaborate PWM and BIOS. One of the problems with using liquid nitrogen for overclocking is that it cools down more than just the CPU; it also cools down the PWM. Since most PWM lose efficiency below a certain temperature range, vendors need to take this into account when designing a new product and make sure the PWM will not cool down too much.
I think most of the overclockers are aware that they represent a niche market as I've heard more than one person asking a vendor to simplify things and bring one mainboard dedicated to overclockers on the market. The problem is that the resources put into the design of this one mainboard well exceed the amount of potential customers (although that is also debatable); in other words, vendors want to make sure different groups of the enthusiast market buy their high-end mainboard. To do that, they need to add excellent audio features (gamers), fancy color schemes (casemodders) and add an excessive amount of sata, usb and other useless ports. Too much useless features for overclockers, too much bios/pwm engineering for gamers.
As for the positive trend for usage of liquid nitrogen. As mentioned before, the popularity of a certain cooling type correlates postively with the charateristics of the prominent hardware. If the highest performing platform does not scale below -50°C, less people will use liquid nitrogen and more people will use cascade cooling. It's a pity HWBOT has only been around for 4y now and only 1y in its current format because the data <2008 is heavily skewed. If only Futuremark would have listened to the XS community in the past and added cooling fields to the ORB! The data of the AXP/A64 era would, without any doubt, have shown a large majority of the users sticking to cooling types varying between +10°C (chilled air) and -30°C (phase-change) because the most prominent technology back them (Athlon64) had a lot of problems with extreme cold. Liquid nitrogen was expensive, not easy to get and not really worth the time since you could reach the same frequencies with a single-stage or chilled water configuration.
So, yes, people use liquid nitrogen at HWBOT because it's necessary to be competitive. But, it's only a necessity because the technology is tolerating those operating temperatures. Think about it this way: it's only because AMD brought their Phenom II technology, which scaled incredibly with temperatures, that overclockers have used liquid helium.
Sandy Bridge brings us back to the A64-era in terms of cooling usage, although it will not be the platform giving you the highest absolute performance. I'm excited to see what that will bring for HWBOT and other overclocking ranking boards.
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