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Antec P183 + SLI?

post #1 of 12
Thread Starter 
Hey guys,

i've been having my sig rig for a while now but i've been looking to go SLI for some time, the only thing thats holding me back is my antec p183 case.

Since I would go 2x MSI 560Ti twin frozr II all the heat would be dumped inside the case. I will be adding two intake fans right in front of the videocards (2x gentle typhoon ap-14). One will be in the lower part in front of the HDD's as an intake and I would add one as a back exhaust. Still doubting if a Gentle typhoon will fit the top exhaust, if it does I will add another one there.

The maximum temperature I got on my 560Ti now is 72° so i'm wondering how much higher the temps of two of these videocards will be in case of 2x 560Ti?

Is there anyone who has a CFx/SLI configuration with this case? How do the temperatures compare with a single card setup? I'm exactly looking for non-reference, in-case-heat-exhausting videocards setups?

If someone could help me out here, i'd be really thankful smile.gif
post #2 of 12
In the case of a high-airflow environment, the P180-type cases do fairly well. I was running GTX460 SLI in mine for a while (air cooled) and it coped fairly well. GPU2 stays cooler than GPU1, as it gets cooler air... take out the top HDD cage so that the cards can get air uninterrupted from the top front intake, and put a fairly powerful fan there, and you shouldn't have any problems.

I'm now running GTX470 SLI in my P180, but I've modded it a little (triple radiator in the roof; high airflow 38mm fans on radiator). I've adjusted the fan profiles to crank the fans up earlier than the defaults, and they top out around 80*C when in a game that really pushes them.

As long as airflow through the case is consistent enough, non-exhausting cards should still be OK. What you might see are CPU temps rise a little as the air pulled upwards by the rear and top exhausts will be warmer.
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post #3 of 12
In my P182 and a 5850 equipped with an similar cooler as your 560Ti (Accelero S2 Turbo) I've noticed the following two situations, details in the pic bellow:

1. If I use a front intake fan (right situation) - about 65°C in 3DMark11 stock case fans on medium speed

2. If I don't use a front intake fan, with two brackets below the card removed (left image) - about 56°C in 3DM11. A fan removed and I got lower temps - I did this by accident as I forgot to connect the front fan and was surprised by the silence and good temps. I left it like that and after some smoke-testing I've found out the reason it works. I have on the upper side two output fans; this creates negative pressure in the case so air is pulled in thru all cracks - air can enter easily thru the brackets bellow the GPU and as such there's a cool flow of air over the graphics card.

I suggest testing with the setup in the left with your current single card and see how you like it - so only two output fans on top of the case and the compartments isolated. This setup should hold even with 2x cards. To further help this systems there are some PCI bracket coolers that pull air from outside the case and blow it on the graphic cards. My 2cents.gif
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post #4 of 12
Thread Starter 
thanks both a lot for your help (repped). A few more questions tho:

1) Paradigm Shifter: I saw on google images that the P180 has 3 removable HDD cages, the P183 only has two, one in the lower chamber and one right above in the upper chamber. Do you mean I should remove this HDD cage in the upper chamber? The thing is: I read in the manual that if no HDD's were installed the cage would work as an air tunnel, sucking in air. The case is able to put one fan in the front of this cage, and one right after it (directly next to the graphics cards that is). Wouldn't this be better to install these two fans instead of just one front fan and no HDD cage?

2) dragosmp: what exactly do you mean by removing the two brackets right under the graphics card? (my English is not fantastic)? Do you mean those things that have to be removed at the back of your case when you install a sound card or graphics card? Or do you mean the black things that are there to isolate the upper chamber from the lower chamber? So that the videocards would get cool air from the lower chamber? Looking at your image you're probably telling the first situation.

edit: reading your post a 2nd time tells me your definitely talking about the first situation. Is it very important that the lower and upper chamber are completely isolated? The thing is I don't think i'll get all the GPU cables and motherboard power cables routed between the side panel and back of the motherboard. I guess I definitely need to route the cables trough the middle of the case. 2nd question: which two fans are you exactly using for the back and top exhaust? Did you remove the upper hdd cage or not? Do you have hdd's installed there?

in any case i'll get to testing the moment I get home, and thanks a lot!
Edited by FlameDB - 8/18/11 at 10:34am
post #5 of 12
if you remove the hdd cage, you could take old 120mm fans and create an air tunnel of your own. this would get the air flow coser to the cards. just an idea
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post #6 of 12
Quote:
Originally Posted by toyz72;14629836 
if you remove the hdd cage, you could take old 120mm fans and create an air tunnel of your own. this would get the air flow coser to the cards. just an idea

Interesting idea, but does the warm air from the GPUs go?
Quote:
Originally Posted by FlameDB;14629577 
what exactly do you mean by removing the two brackets right under the graphics card? (my English is not fantastic)? Do you mean those things that have to be removed at the back of your case when you install a sound card or graphics card? Or do you mean the black things that are there to isolate the upper chamber from the lower chamber? So that the videocards would get cool air from the lower chamber? Looking at your image you're probably telling the first situation.

edit: reading your post a 2nd time tells me your definitely talking about the first situation. Is it very important that the lower and upper chamber are completely isolated? The thing is I don't think i'll get all the GPU cables and motherboard power cables routed between the side panel and back of the motherboard. I guess I definitely need to route the cables trough the middle of the case. 2nd question: which two fans are you exactly using for the back and top exhaust? Did you remove the upper hdd cage or not? Do you have hdd's installed there?

in any case i'll get to testing the moment I get home, and thanks a lot!

Yep, I was talking about the metal things that must be removed when something is installed, English isn't my strong point either.
About the rest of the questions:
*the upper HDD cage is removed because I don't use it. With or without it if there's no intake fan in front it doesn't change a thing
*the compartments don't have to be 100% isolated. I used the plastic movable cover to umm... cover as much as the space possible while leaving some cables to pass thru. You need some separation between the compartments so that the negative pressure inside the main compartment isn't filled with air from the lower part, but with cold air outside the graphic cards (left image)
*I have the Antec Tricool on medium 7V setting. When playing more demanding games I sometimes up them on full speed 12V to lower CPU temp below 60°C
*the disk is in the compartment below; while I have less than 3 disks I can't think of any reason why I'd put them up - below it's in a wind tunnel well colled and separate from the space heaters (GPU and CPU)

Another thing - a way to improve on this setup, and SLI may benefit more, would be to put the front fan as exhaust (not intake); this way most of cold air would be forced in thru the brackets below the GPUs. Part of the warm air from the GPUs would be removed at the front and part thru the up and rear fans.
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post #7 of 12
Quote:
Originally Posted by FlameDB;14629577 
1) Paradigm Shifter: I saw on google images that the P180 has 3 removable HDD cages, the P183 only has two, one in the lower chamber and one right above in the upper chamber. Do you mean I should remove this HDD cage in the upper chamber? The thing is: I read in the manual that if no HDD's were installed the cage would work as an air tunnel, sucking in air. The case is able to put one fan in the front of this cage, and one right after it (directly next to the graphics cards that is). Wouldn't this be better to install these two fans instead of just one front fan and no HDD cage?

Hexus images of P183 - I can see two removable HDD cages, unless there is another new variant they've released (they did for the P180; there's a couple of different models all called 'P180' each with a different internal arrangement). They might have changed the way the upper HDD cage worked with the updates to the P183; for me, I noticed temps drop (and noise; I presume there was less turbulence/interference) across the board with the upper cage removed.

...

Not sure how well reversing airflow throughout the system will work (ie: drawn in via rear fan and top fan, exhausted by front fan) but it might be worth a shot. smile.gif It'd create positive pressure, but negate the dust filters on the front fan. frown.gif
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Aoi
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Midori
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post #8 of 12
Thread Starter 
Quote:
Originally Posted by dragosmp;14630441 
Interesting idea, but does the warm air from the GPUs go?



Yep, I was talking about the metal things that must be removed when something is installed, English isn't my strong point either.
About the rest of the questions:
*the upper HDD cage is removed because I don't use it. With or without it if there's no intake fan in front it doesn't change a thing
*the compartments don't have to be 100% isolated. I used the plastic movable cover to umm... cover as much as the space possible while leaving some cables to pass thru. You need some separation between the compartments so that the negative pressure inside the main compartment isn't filled with air from the lower part, but with cold air outside the graphic cards (left image)
*I have the Antec Tricool on medium 7V setting. When playing more demanding games I sometimes up them on full speed 12V to lower CPU temp below 60°C
*the disk is in the compartment below; while I have less than 3 disks I can't think of any reason why I'd put them up - below it's in a wind tunnel well colled and separate from the space heaters (GPU and CPU)

Another thing - a way to improve on this setup, and SLI may benefit more, would be to put the front fan as exhaust (not intake); this way most of cold air would be forced in thru the brackets below the GPUs. Part of the warm air from the GPUs would be removed at the front and part thru the up and rear fans.


I completely understand now. I'll be trying this asap. One more thing maybe: you're saying the brackets should be removed. But is this really necessary because last time I checked I saw there were holes in all of the brackets? Maybe keeping the brackets on will keep the system a bit more silent too. I'm all for silence:p

i also find the antec tricools to be very good @ low speed, but @ medium speed I already find them too loud. I'll be testing with two gentle typhoon AP-14's. I only hope they fit in the rear top since they have this not-open but not completely closed frame style :s
post #9 of 12
Interested to see how it works out for you. I have a p183 as well and have been trying to find the best fan configuration to keep temps down.
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post #10 of 12
Thread Starter 
I'll keep you posted. Trying this out on monday evening, tuesday evening and wednesday, since I gotta work during the day:(
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