I cant boot up 1T

my system

neo 2 plat bios 1.3
3200+ winni
raptor hd(sata 3)
gskill mem pc3200/pc4400 tccd

i jus cannot boot up using 1t is there a setting i forgot??
i jus spent £180 on gskill memory coz i thought my old mem was the problem but i still cant boot up 1t even with no ocing it jus bleeps an i must clear cmos
PLZ help me! what am i doing wrong ?

any help is much apprecaited

Have you tried swapping memory slots to 3&4?

Otherwise why not use "Optimal" settings to see if it works and then tweak from there?