CM690 XSPC RASA 750 RS 240

[G-Dubs]

Well a good day and a bad day.

Got a lot done on the case, but have had to change my plans a bit.

1st off a few pics of the progress (the good bit), bad bit at the end.


Decided to go with the stock kit in the end. I can always change it later if I want a change of scenery.

I always PTFE my fittings. PTFE is an active barrier, and the O ring is a passive barrier, but no reason not to have both.

Silverstone air penetrators on the Rad. and barbs fitted

Barbs fitted to the res

The i7 ready for....

The Rasa

Bit of a blob

Thought it all looked so pretty It deserved some nice shots.

Ok now the not so good bit. I was originally intending to have the Silverstones inside the case under the rad pushing air up and out through it, assisted by the fans that come with the case having a bit of a pull from the outside of the rad.

However....

There aint enough room inside to have fans pushing up and uot.

So a couple of options.

1 Just the silverstones as pull on the rad (they don't work at their best as extracts)

2 the silversones as push from the top down through the rad. this of course would be great as it would be cool air from outside the case being pushed over the rad, only problem is it's then entering the top of the case area. perhaps the rear case fan would be enough to remove the warm air, although I'm a bit worried about general air flow through if I do this.

3 find another fan to use as extract, either the fans that come with it or the orange Bitfenix I have

So what do you think guys?

 

[joxang]

Very nice photos m8.

I'm of the understanding that pull is supposed to be a degree or two better than push in WC anyway. Also of the understanding that air penetrators are absolutely sucky as radiator fans due to their low cfm, low static pressure, and the fact that you don't need 'targeted' flow with a radiator fan . RS240 needs reasonably good air flow too.

Otherwise I love how it's looking so far!!

 

[Kurisu Makise]

wouldnt Gentle typhoons 1850rpm in pull be better than the air penetrators?

 

[LiamJ]

Having the AP as push blowing down on the rad will probably be the best solution without buying/using other fans.

 

[King Damager]

Thought this might be an interesting Vid for you

http://www.youtube.com/watch?v=_YzbR3cHiNE&feature=feedu

kd

 

[Shayper]

AFAIK, the Laminar airflow provided by the Air Penetrators is more preferable for use on radiators than the Turbulent airflow provided by most other fans. They are definitely what I shall be using for my WC setup

 

[joxang]

AFAIK, the Laminar airflow provided by the Air Penetrators is more preferable for use on radiators than the Turbulent airflow provided by most other fans. They are definitely what I shall be using for my WC setup

Is that an opinion? Because I would be genuinly interested to see evidence to back it up.

All the benchmarks I've seen of APs in radiators (and in some cpu coolers); the APs produce extremely subpar results. The type of airflow does not matter for rad cooling - targetted airflow is useful in a case fan that targets a certain area of a case - but shrouding and % of air that passes through a rad as well as cfm and static pressure are far more important.

The Air Penetrators are nothing but stock low cfm SS fans fitted with a reversed grill which 'unrotates' the airflow (and a much higher price tag).

 

[Shayper]

Basic physics really. Laminar, or straight airflow passes through radiators a lot easier, as it travels in a much more straight line than turbulent airflow, thus taking more heat. Turbulent travels in a lot of random directions, so would be buffeting off the radiator fins and therefore being less efficient. However, as you said it you also have to take into account CFM, and if the AP181's are anything to go by, these produce quite a high CFM. I can't comment on static pressure however.

And I'm pretty sure that these are not just "stock" CM fans, as, per TealC's review, they have more blades. The reviews I have seen have been brilliant

 

[joxang]

And I'm pretty sure that these are not just "stock" CM fans, as, per TealC's review, they have more blades. The reviews I have seen have been brilliant

Apologies for this build log getting a bit off topic but it's kind of relevant .

http://hardforum.com/showthread.php?t=1530259

The AP181 is the same fan as the FN-181 with a different speed profile and counter-spun grill. Both have the same Globe Fan model number of S1803212 with the FT-02 stock fan being the M-3M variant (700rpm/1000rpm), and the AP181 as the HN-3M variant (700rpm/1200rpm).

Anyway OP show us the temps!! I was wrong about the cfm, the AP181s are actually pretty high (I was thinking of 121s), and static pressure slightly lower than a GT so it would be interesting to see what happens with the set up.

 

[Shayper]

Apologies for this build log getting a bit off topic but it's kind of relevant .

http://hardforum.com/showthread.php?t=1530259


Anyway OP show us the temps!! I was wrong about the cfm, the AP181s are actually pretty high (I was thinking of 121s), and static pressure slightly lower than a GT so it would be interesting to see what happens with the set up.

OK I apologise, it's just that the performance was rather different, my bad

 

[~REALiTY]

Love the look

 

[G-Dubs]

Thanks for all the great comments and feed back guys, and no worries re the little off topic debacle on the last page. It's actually all relevant and helpful

I have no idea what the verdict was but everyone seemed to friends afterwards.

Time for a bit of an update, and hopefully garner some good advice from you guys.

Been spending a few days staring at the case trying to visualise the loop and the options for fan placement and direction.

I've narrowed it down to a few options and would like to know which should be best. I've put my thoughts in on each also

Option 1
Top mounted rad with 2 fans on pull
rear case fan as intake to supply fresh cool air to rad
1 front fan on intake and 2 base fans on intake to give cross board airflow up and towards the rad.
pros, good cross board cooling
cons pull not as good as push

Option 2
Top mounted Rad with 2 fans on push
rear case on exhaust
front fan on intake and 2 base fans on intake to give cross board flow.
Pros
optimal cooling of rad with fans on push
cons possible turbulent air mid case may disrupt cross board flow.

Option 3
Bottom mounted rad with fans in push pull
top fans on exhaust
rear fan on exhaust
front fan on intake mounted higher to cool HDD and give cross board flow.
Pros.
best rad cooling solution
cons perhaps less cross board flow than other options
WC loop not as tidy looking (this is a biggy for me)

So what do you think guys?

If you've got a better idea here's a blank.

 

[KiiYzOo]

I'd go with option 1.

 

[hellarda]

I'd go with option 1.

surely then you're pulling all the heat from the mobo and HDD etc through the rad?

i'd go with option 2

 

[G-Dubs]

Cheers for the responses guys.

Why not option 3??? surely it's getting best rad cooling

 

[seekdestroy]

I'd go with option 2. But don't fans cool better when pulling through the radiator?

 

[KiiYzOo]

You said you thought that option 3 would be messy, and the reason I said option 1 is because there is only a couple of degrees difference between push and pull I personally don't want to have a huge amount of dust build up on my rad.

 

[Sgt Tackleberry]

option 2

 

[Tealc]

From a thermodynamics point of view Option 3 would be the clear winner. Better cooling through Rad with cool floor air.

The other options are messy regarding airflow, but then will probably work just fine anyway.

 

[LiamJ]

Option 3 to be honest.

Not sure how you want the loop to look but I don't think the rad being there will make it look significantly worse. Fancy giving us some loop diagrams for top/bottom mounts?