i regret after i bought it 

I have to agree the GeminII works great but inside the 690, it's probably choking when it comes to the air flow
Earlier with my cheap casing w/ side panel opened, I get 24-25C idle but in the new 690 case, I get 30C. Impressively sucks.

Ok, I re-organized the fans a bit and had those low cfm, low performance Cooler Master fans on top and rear exhaust. It isn't so noisy anymore and temps are a bit better but still worse than my cheap case with side panel open.

I thought CM 690 should give better temp since it has good airflow?

I know lapping would probably help but what I'm saying is this 690 gives a worse temp compared to cheap casing with panel open.

are u comparing the temps in the 690 with an open or closed side panel?

if ur comparing closed vs open.... then of course open is better.

Open chassis has better ventilation. That's all. I have no idea why you got GeminiII when you could get something better, but heck, "nasi sudah jadi bubur". So, unless you want to leave your CM chasis open, then be ready for a higher temperature.

The thing about GeminiII is that it's airflow is not direct. It blows unto the motherboard. The air is not directed out of the chassis. Conceptually, it cools other components on your motherboard, but Anandtech has proven that the difference is neglible. It does not do its primary job well especially with the configuration of chassis, and its secondary job is just a marketting gimmick.

Are you saying the Xigmatek gives 11C improvement?
Well, this is really interesting as I never had 11C improvements changing from one to another 3rd party cooler Your load temps must be in the 30's without air cond then.
Maybe Xigmatek is really that superb or you had a bad mount on your GeminII earlier.

Cool stuff indeed You're right because I'm using 1.39125Vcore now after I upped some FSB and it's giving me 55C load.

How much does that Xigmatek costs and where can I buy it?

how you lapped the xigmatek?
there are heatpipes at the base area woh.

no idea how he gonna lap it lol : D

lap too much then can bocor the heatpipe oledi

i totally agreed with u bro, 

Can GeminII uses thicker fans ? As usual we can see 120x120x25mm, how bout those 120x120x38mm profile fans  ?

I change back to TT BT VX, surprisingly, after cleaned and polished, it's better than Gemini II. Idle for BT VX is 4c higher, but during full load, it's 6c cooler compared to Gemini II. Getting Xigmatek S1283 to see how it performs.

My BT VX is lapped though, that's why performs good. Gemini II still new and going to sell it off, so not wasting time lapping it. I guess it will be only cooler by 2c after lapped.