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SLI Fractal Design Define R4 Future Overclocking & Fan advice needed please.

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a b K Overclocking
October 21, 2013 11:30:54 AM

I'm pre/ordering my PC components on Wednesday and due to financial restrictions i cant buy a 2nd card for SLI, 2 additional monitors, an aftermarket cpu fan, and case fans.

As a result i've ensured that i've bought the right mobo to support the crossfire ability and the right case for upgrading fan's whilst keeping noise to a minimum.

Here's the gaming pc spec;

Intel Core i5-4670K
MSI Z87-G45 Gaming
Mushkin Blackline 8GB (2 x 4GB) DDR3-1600
SAPPHIRE TOXIC R9 280X 3GB GDDR5
Samsung 840 EVO 120GB 2.5"
Seagate Barracuda 2TB 3.5"
Fractal Design Define R4 w/Window (Titanium Grey) ATX Mid Tower Case
XFX 850W 80 PLUS Bronze Certified
DVD RW
LG 23EA63V 23" IPS LED

over the next 6 months i'll be buying in order;

Case Fans, 2 additional LG 23EA63V 23" IPS LED monitors, 280x (2nd card) for crossfire then finally an aftermarket CPU cooler to overclock the CPU. My logic is that nothing is out currently that the PC won't be able to handle at 1920 x 1080 (GAMES)

Q1. What is the optimal fan configuration for fan placement? (# of fans and placement)

Q2. What is the optimal configuration for HDD stacking in my build to increase air flow if i'm using 1 x 2.5" 1x 3.5" and 1 5.25" ?

Once i've increased the GPU capability and have my monitors set up i want to o/c the CPU. (i can do my own research on aftermarket CPU cooling)

don't seem to be able to find any specific information on the case and optimal cooling configs.

Can anyone help?

Jonny

a c 126 K Overclocking
October 21, 2013 12:24:46 PM

1. I would keep the two 140mm fans in front as intakes. That will give you a positive pressure situation and provide sufficient airflow. Positive pressure allows the intake air to be filtered and that keeps your case cleaner.
At the very least see how you do before buying added fans. More fans adds to noise. Two 140mm fans should be able to exhaust air faster than your graphics cards can take in air.

2. I would keep only the bottom hard drive rack. It will obstruct the intake the least. Put your ssd and hard drive there. Remove the upper rack.

3. The 4670K is very competent at stock. You can expect a mild 20% oc to 4.0 with minimal increase in cooling requirements.
I see no need for all in one liquid coolers, a simple $30 cooler will do, or a $75 noctua nh-d14 or phanteks will be as good as it gets and be quiet.
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a b K Overclocking
October 21, 2013 12:37:34 PM

geofelt said:
1. I would keep the two 140mm fans in front as intakes. That will give you a positive pressure situation and provide sufficient airflow. Positive pressure allows the intake air to be filtered and that keeps your case cleaner.
At the very least see how you do before buying added fans. More fans adds to noise. Two 140mm fans should be able to exhaust air faster than your graphics cards can take in air.

2. I would keep only the bottom hard drive rack. It will obstruct the intake the least. Put your ssd and hard drive there. Remove the upper rack.

3. The 4670K is very competent at stock. You can expect a mild 20% oc to 4.0 with minimal increase in cooling requirements.
I see no need for all in one liquid coolers, a simple $30 cooler will do, or a $75 noctua nh-d14 or phanteks will be as good as it gets and be quiet.


so use the stock fans as intakes at the front and have nothing venting at the back? :??: 
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a c 126 K Overclocking
October 21, 2013 12:46:38 PM

That is correct.
The case might come with an extra fan for the back, that would be ok.
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a b K Overclocking
October 21, 2013 12:50:21 PM

Forgive my nativity, but positive pressure = less dust ?

I think i'd sleep better at night knowing that my PC has some kind of exhaust fan, my analogy for this is if you open 2 windows at the opposite side of your house you feel a draft coming though and its cooler. if you open 1 window its not as effective in cooling the room.

i think i'll buy an additional fan as it only comes with 2 x 140mm.
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a c 126 K Overclocking
October 21, 2013 1:34:41 PM

With positive pressure, all cooling air is drawn in through one set of fans with a filter.
Then clean filtered air is exhausted out everywhere.
You will need to relocate the supplied rear 140mm fan to the front.
In a negative flow case, it is the top and rear fans that exhaust the heated air. The problem is that such air is drawn in not only through the front air filter, but also in through every other opening and crack in the case. That allows dust to. come in.

Your analogy is correct, but does not go far enough. Add a fan to your window drawing air in, and leave the back window open. That will cool your room.
You can help the process a bit by adding a fan exhausting air out the back window, but not by as much as you think.

I might be cautious about buying the r9 280X. I just saw a thread where there seemed to be some driver issues.
Since it is a rebranded 7970, you might be able to find the older card at a good price.
The fan type coolers do a good job of cooling, but they dump the heat into your case adding ot the case cooling load.
If you used a blower type cooler the heat is sent directly out the back of the case.
Here is one such example: http://www.newegg.com/Product/Product.aspx?Item=N82E168...
I that same vein, consider a GTX770 instead. It is in the same performance category. AMD currently has issues with stuttering in crossfire. Planning on a dual card via GTX770 would reduce that issue.
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a b K Overclocking
October 22, 2013 3:08:28 AM

Personally, I wouldnt run without an exhaust fan. I would get another 140/120mm Fan as an intake and leave the existing exhaust fan in place.

However, my Fractal Arc Midi, runs in the standard config of 1 140mm intake and 1 140mm rear exhaust and 1 140mm top exhaust, and this works just fine for me. My front dust filter picks up lots of dust, and my case doesnt get dusty on the inside and my temperatures are good.
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a c 126 K Overclocking
October 22, 2013 6:52:53 AM

Nothing wrong with an exhaust fan too.
On my case, a Silverstone TJ-08E, I run only a single 180mm intake fan. Undervolted and on low speed. I was prepared to add an optional rear exhaust fan, but found it completely unnecessary.

It is not so hard to add or switch fans, but I suggest you work with what you get first to see how you do.
PC parts are built to tolerate some degree of heat, and will protect themselves if they get too hot.
So long as your temps are reasonable, I see no sense in added expense and noise of extra fans.
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