i think his mobo that asrock...just can support for DRAM freq just DDR266...
the latency jst only 2.5 the highest can setting....

the corsair ram he use is ddr 400 that latency 3.0-3-3-8

for mst setting this latency in mobo but asrock 478 jst can setting only ddr333 that latency is 2.5-3-3-7...

so can ka after we update bios the dram freq can setting until drr400