Overclocking 2180, what else can i do?

[lopkinfop]

i have overclocked my 2180 to 3.5Hz im pretty happy with that (might do more later)
my idle temps are 25-30 and load is 45ish



2180 with Tunic tower
IP35
2Gb 6400 Geil
ATI 1950 Pro

my ram is at 840MHz with 4-4-4-10

my question is what else can i do to improve performance

this is what i have set in the bios what values could the other memory setting be set at?
Cs latency time - 4
Ras to cas - 4
Ras precharge - 4
Precharge delay - 10
Refresh cycle time - auto
Write recovery time - auto
Write to read delay - auto
Act to act time - auto
Read to precharge - auto

 

[lopkinfop]

it ran for 10 hours or so with no problems, just ran that to show full load