Will these DDR2 memory work together?

Currrently have..

2 x 2GB
PC6400 / 800MHz DDR2
CL 5-5-5-18
1.8 Volts (2.1 Extended Voltage Protection)

Thinking about adding..

2 x 2GB
PC6400 / 800MHz DDR2
CL 5-5-5-15
2.1 Volts

Will they work together ok? Also, which memory is faster?

I've currently got a Q6600 g0 stepping, overclocked to 3.0ghz if that makes any difference.

What brand of memory are we talking about? As long as the top brand can do 2.1v it should be fine!

Quote:

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Originally Posted by 360bhp

currrently have..

2 x 2gb
pc6400 / 800mhz ddr2
cl 5-5-5-18
1.8 volts (2.1 extended voltage protection)

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ocz ?