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The Challenger ITX was the best 6600XT model ...in my opinion.The XT can be more efficient. The non XT I had did stabe 2000Mhz with a little less than 0.9V and the XT did stable 2250Mhz with a little less than 0.9V... both at a maximum GPU power draw of around 85W, but 14.3% more CU's and 12.5% higher clocks.
The Challenger ITX was the best 6600XT model ...in my opinion.
The XT can be more efficient. The non XT I had did stabe 2000Mhz with a little less than 0.9V and the XT did stable 2250Mhz with a little less than 0.9V... both at a maximum GPU power draw of around 85W, but 14.3% more CU's and 12.5% higher clocks.