Do you mean 1 GB of RAM?
If so, then yes, you probably can. Especially if you get a Venice core. I have a Winchester core and it is an AMD Athlon 64 3000+ and I hit 2.3 GHz no problem. My RAM is around 210 MHz with the FSB at about 250 or a little bit higher. You should be able to get that speed at least. It rates better on the 3DMark tests than it did before, so that is why I was wondering what was meant by a LOSS in performance.
AMD Athlon 64 3000+ socket 939 @ 2.3 GHz
MSI K8N Neo2 Platinum motherboard
EVGA GeForce 6800 GT
2 GB DDR 400 (PC 3200) (2 x 1 GB sticks) (Dual Channel)
DVD player and seperate DVD RW drive
80 GB Western Digital Hard Drive
500 watt power supply
Sound Blaster Audigy
Logitech 5.1 surround sound speakers
SAMSUNG SyncMaster 710T LCD monitor
Aspire X Navigator Case