Are you really trading intra day or are your time horizons more like weekly or monthly.
What are you trading? Are you trading stocks, options, futures, ETFs, commodities, etc?
If you are trading very small time frames, then I would not use any sort of gaming machine for trading. I would be looking at building a server style machine and paying the extra amount for xeon cpus, ECC ram, and redundant power supplies.
_.=5 GHz Overclock Club=._