I would suggest some GOOD RAM. Clip from the last paragraph of the Geil review.
In the more difficult area of memory for the Athlon 64, the Geil brings nothing new to the table. We found it behaved like Samsung memory tested in our roundup on the Athlon 64 platform, which means it tops out MUCH lower on the A64 than the Intel platform. Consider the A64 limit to be around DDR466 with this Geil Ultra X. That means for Athlon 64 systems, your best choices are still Crucial Ballistix or other Micron-based memory like OCZ 3500EB or 3700EB. The Micron-chip memory performs the same in our tests on either Intel or Athlon 64. If you prefer Samsung chips for your A64, then OCZ PC3200 Platinum Rev. 2 was the only Samsung dimm to reach DDR500, which was still far short of the DDR557 it reached on the Intel 875 platform.