Don't think 1T is possible over 900-950Mhz mate, for 4-4-4-8 1T you will need to drop ram speed to around 800mhz, 4-4-4-12 2T 1000mhz is surely doable...

Think you set ya goals too high, my Gskills do 1000mhz 4-4-4-5 2t but not 1T...