Bro, if i were you, i will only use the CPU waterblock.
Why?

Coz that will make you're processor run cooler.
And you know you'reself that the processor is the most important part in a pc, and that's the highest temperature producer...

My advise for you is, take out the northbridge waterblock, then use back the original northbridge heatsink...

This way, you can keep you're processor run cooler...
--------------------------------------------------------------------------------------------------------------
To watercooling experts, kind to help me in watercooling a bit?

Now, i'm using "Air Suling" [can't remember the name in english ] for my watercooling loop.

1st question:
How do i make the water turns to UV green?
Is there any Car Coolant that meets the specification to turn my "Air Suling" to UV Green?

2nd question:
What's the measurement for mixing the water with the car coolant?

Help me guys...

Got bored with the transparent colour...
That's why i want to turn it to UV Green...

***Please don't tell me to get those UV Green tubes...