2 ways, everest home at www.lavalys.com
or taek off the heatsink and look on the core
I am not sure if/how much you may get errant information from software but I had read elsewhere that the only way to be 100% certain is to pull the HS and read it. (then again, maybe the guy who was stress this worked for ATI and therefore was trying to get people to void their warranty?? Yeah, conspiracy guy here)
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