1000/3.6 = 278mhz*2 =555mhz rated.
Now depending on the videocard maker u the ram might me slightly undervolted or overvolted. With a slightly overvolted ram u can make a big jump. my mem went from 446 to 580 and i still have room. U should without a hitch hit 600mhz.Farther on depends on alot more variables.
Pentium 4 Northwood BO 2.0Ghz @ 2667Mhz Idle Temp 34 Load 51 Stock Cooling
Asus P4T533-C FSB @ 133.6 VoltCore 1.712 Idle 1.648 Load Bios Revision 1010
Samsung PC800-40 RamBus @ 804Mhz Turbo Enabled
Msi Gf4Ti4200-VTP Ms-8886 @ 275/567 128MB 4ns 4345-Det Drivers
Enermax 350w Whisper Dual Fan w/Fan Control
SoundBlasterLive! Value
HP CDr/Rw 8200a X32/X4/X4
8.9Gig 5400rpm Fijusi HD - Yes I Know.
Windowns Xp Pro