First off,
WELCOME TO THE FORUMS DUDE! 
Now, down to 'business'
Depending on your cooling, your processor overclock is far from shabby - ~2400 MHz with aircooling (I'm assuming you are using aircooling) is a respectable achievement. Lets forget about the processor overclock for now, it looks like your chip maxes out at ~2400 MHz, when given the amount of voltage that you're comfortable giving it (~1.55V from your screenshot). That's reasonable.
Your RAM however, is rated at DDR400, and it should run at 200 MHz easily with no VDIMM overvolt and the stock timings that it's rated for. You currently have your memory on a 'divider' to the processor's HTT speed - your HTT is set to 270 MHz, and the 'divider' puts your memory to 173 MHz.
One of the secrets to overclocking, especially with these complex and multi-part A64s (There's loads of stuff to play with
), is to divide and conquer. Drop your HTT speed to 200 MHz, drop your processor multiplier to 8X, drop your LDT multiplier to 2X, change the FSB/HTT 'divider' (or 'ratio') to 1/1, and start pushing your memory independantly of the processor. Since we know that your processor can handle 2400 MHz, any processor clockspeed below that is "safe" for memory-specific overclock limit testing.
By keeping the processor at a slower and "known stable" speed, we remove the processor as a source of error, allowing you to push your memory by itself, and see how far it will go. Raise the memory 'FSB' in 5 MHz increments using stock timings, stability testing as you go. When your memory loses stability, add a 0.1V VDIMM overvolt and continue to increase in 5 MHz increments. Stop at 2.8V of VDIMM, and see where that leaves you for a stable memory overclock. Later on, you can come back to this, overvolt more if you want to, and play with timings a little bit. For now, sticking to stock timings and a small overvolt is a good idea for simplicity's sake.
Now that you have your memory's "peak" clockspeed for 2.8V, put it together with your processor's "peak" clockspeed of ~2400 MHz. Close to where we left off, 270x9, is a good place to start on your processor overclock - although this time change the memory divider so that your memory is running closer to it's limit.
For example: A 5/6 divider, with your HTT set to 270 MHz, would get 225 MHz out of your memory (5/6 is a ratio of 1.2, so an HTT of 270/1.2=225 MHz).
I don't know what type of memory chips your RAM uses, although knowing this information will give you a rough idea of how they'll behave with more voltage and with different timings.
What are the version numbers, and the stock memory timings on your Corsair sticks?
XMS-PC3200C2 Rev1.0 (2-3-3-6-1T) --chip--> Winbond CH-5
XMS-PC3200C2 Rev1.1/2.1 (2-3-3-6-1T) --chip--> Winbond BH-6
XMS-PC3200C2 Rev1.2/2.2 (2-3-3-6-1T) --chip--> Winbond CH-6
XMS-PC3200C2 Rev3.1 (2-3-3-6-1T) --chip--> Infineon B-5
XMS-PC3200C2 Rev4.1 (2-3-3-6-1T) --chip--> Samsung TCCD
XMS-PC3200C2 Rev4.2 (2-3-3-6-1T) --chip--> Samsung TCCD & TCC5
XMS-PC3200C2 Rev5.1/6.1 (2-3-3-6-1T) --chip--> Mosel Vitelic 5ns
XMS-PC3200C2 Rev1.5 (2-2-2-5-1T) --chip--> Winbond New BH-5 ~ Brainpower PCB
With your memory's revision number and stock timings, you'll find your chip type on this list. I hope all that helps you break the "memory-overclock ice" a little bit
.
. 
