Rads in the 750D

[Vengeful Souls]

I recently finished a build in the 750d and I would like to water cool it. This will be my first time water cooling, so keep that in mind.

 

So this is my system:

• CPU i7 4790k
• Motherboard Gigabyte GA-Z97X-UD5H-BK
• RAM Corsair Vengeance Pro 16GB (2 x 8GB)
• GPU Gigabyte GeForce GTX 970 4GB WINDFORCE 3X
• Case Corsair 750D
• Storage Samsung 840 EVO 120GB, Western Digital BLACK SERIES 2TB
• PSU Corsair RM 650W

(If you need to know anything else, just ask)

I was wondering if i could technically fit four radiators in it. I think I can, but I am not sure if it would be a good idea to cover the exhaust with a rad

 

I was also wondering which radiators/ fans should be push or pull.

 

I am going to put my hard drive one of the 5.25 bays so there will be no hard drive cages on the floor. I will be using something ls to complete that task:

http://www.newegg.com/Product/Product.aspx?Item=N82E16811993004&nm_mc=AFC-C8Junction&cm_mmc=AFC-C8Junction-_-na-_-na-_-na&cm_sp=&AID=10446076&PID=6146836&SID=i65pycthz0000a1700053

 

I would also like to know where the best place to mount the res and the pump would be and if I could use something like an UN mount for the pump. The res I am going to use is a Phobya balances 150. I don't have a pump picked out yet cause I think that can change depending on how many rads I have.

 

I have found water blocks that I like for my CPU and GPU, but I can't find one for my motherboard. I have looked long and hard and I was wondering if anybody knew a universal one that would work. A full board one would be nice but anything works. I do know that motherboard blocks don't help much with heat, but I really like the aesthetics of them

 

Sorry for all the questions, I just don't really want to screw anything up and have to buy more of anything than I need to. If you need to know anything else to answer my multitude of questions, just ask

 

Thanks

[airdeano]

welcome to the linus Tech Tips forums!

 

ok, a lot of this will depend on location, budget and abilities.

 

for a CPU/GPU loop, some can get by on a single 360 radiator (3x120). depends

on overclocking ability, comfort on loaded temperatures and tolerance to fan noise.

 

to play it safe most can use a 2x 240 radiator loop or a 360 and 240 loop (the latter

can easily handle a second GPU if upgrading later).

 

the 750D can handle a XT45 360 in the roof with a single fan set. either the 240 can

mount to the front intake or floor (your choice for hose routing).

 

push/pull isn't necessary if using the right fan to begin with.

 

depending on your aesthetics needs, a dual bay reservoir is a place to start (but the

750D and dual bay res don;t really look the part). so your choice of a tube reservoir

is valid, but you will have to drill holes in the chassis to mount it firmly.

 

pump-wise, i prefer the Laing D5 pump. there is also the DDC (9, 12, and 18watt)

but for multiple block configs (over one) use nothing less than 18w pump. the D5

allows the coolant to cool the pump itself, the DDC relies on airflow to cool itself, so

closed ventilation of lack of airflow can force the pump to an earlier than expected

death. they make a heatsink for this purpose as an option.

[KWelz]

I used to have a Phobya in my 750D.  It works well between the GPU and drive cage with no drilling or case Mods needed.   It is very easy to run a 360 in the top and a 240 in the front.  Another 240 can be run in the floor as long as your PSU is short enough.  Sadly my PSU was a bit too long

 

There are some holes in the case that line up perfectly to mount the Res with using the hardware supplied.  

 

[siox69]

here's my 750D

 

alphacool 360 xt45 at the top and alphacool 240 xt45 at the bottom

 

[brandishwar]

In my 750D, I have a 360mm in the top, and a 240mm in the front and bottom, all of them ST30s. In my wife's system (750D as well) I have a 360mm XT45 in the top, 240mm XT45 in the front and a 240mm ST30 in the bottom.

 

[chewbaca5000]

In my 750D, I have a 360mm in the top, and a 240mm in the front and bottom, all of them ST30s. In my wife's system (750D as well) I have a 360mm XT45 in the top, 240mm XT45 in the front and a 240mm ST30 in the bottom.

 

 

First off, sweet build!!  I have a 240 st30 for the bottom and 240 xt45 for the front mounted inverted like in your pic here but i cant get it mounted using the stock 120mm fan holes in the front.  Im trying to mount it inverted with the ports toward the bottom of the case like you have here.  On mine the rad is hitting 2 places at the bottom of the 5.25" drive bay.  If i could raise the radiator up about an 1/8th inch it would work.  2 places the rad is hitting are: 1) the lip that hangs down a 1/4 inch or so near where the bottom of the drive bay and the front plane of the case meet.  2) the middle bottom lateral dimpled area that hangs down a 1/4 inch or so (there are 2 of them running laterally at the bottom middle and bottom rear of the drive bay).  I attached a screenshot with some red circles drawn where the problem areas are.  

 

 

I had resigned myself to cutting those areas out but since you got yours to fit...can you maybe post a closeup pic of the mounting of your wifes 240 xt45 in the front please?  Id love to get some info on which holes you used to pass the bolts through so i can do the same thing.  Thanks a bunch!

[froobs]

I have a 750d will a 64mm rad and 25mm fan work with clearnace?

[brandishwar]

I have a 750d will a 64mm rad and 25mm fan work with clearnace?

 

On the top, No. It'll interfere with your mainboard. On the bottom or front, yes.

[chewbaca5000]

in which position?  top, front or bottom?  if you're referring to a 360 on top the safe clearance is 80mm, 85mm is the normal max.  You usually end up hitting some components on the motherboard at that point though it depends on the board.  You're at 89mm with a 64mm rad.  That being said, i have seen posts of folks that made it fit but they arent using the stock holes in the top and it depends on how the board is configured.  You will need to offset quite a bit to get the power cable in the upper left of the board to still work.  Safer bet would be to run an xt45 up top.  The thermal efficiency of a alphacool UT60 and an xt45 are within a few percentage points of each other so you arent gaining much going with the 60mm.  

[brandishwar]

I had resigned myself to cutting those areas out but since you got yours to fit...can you maybe post a closeup pic of the mounting of your wifes 240 xt45 in the front please?  Id love to get some info on which holes you used to pass the bolts through so i can do the same thing.  Thanks a bunch!

 

For a 240mm radiator, you have to use the vent holes. This means you can only use 4 mounting screws instead of all 8 of them, but I haven't had any problems with stability on the front radiator.

 

 

This is really the only way to get the proper clearance for the bottom radiator and fan:

 

 

These are from Part 5 of the build log for my build, Beta Orionis.

[chewbaca5000]

For a 240mm radiator, you have to use the vent holes. This means you can only use 4 mounting screws instead of all 8 of them, but I haven't had any problems with stability on the front radiator.

 

 

This is really the only way to get the proper clearance for the bottom radiator and fan:

 

 

These are from Part 5 of the build log for my build, Beta Orionis.

 

Thanks, appreciate the help.  So did you use the stock fan mounts for the 120's then?  That would leave a portion of the radiator at the bottom not getting air blown through it right?

[brandishwar]

Thanks, appreciate the help.  So did you use the stock fan mounts for the 120's then?  That would leave a portion of the radiator at the bottom not getting air blown through it right?

 

I didn't use 120mm fans. I used 140mm fans on the front. Two 140mm fans should practically cover the 240mm radiator (they're typically about 280mm long, give or take) when mounted how I have it. If I was going to use 120mm fans, I'd fill out the entire front with them -- you can put 3x120mm in the front -- but the 2x140mm work perfectly fine. It's if you use the 140mm fans but use the labeled radiator mount holes that part of the radiator may be left uncovered.

[chewbaca5000]

gotcha, thanks.

[froobs]

On the top, No. It'll interfere with your mainboard. On the bottom or front, yes.

what rad size will allow me to have clearance and no interfernce? 

[KWelz]

what rad size will allow me to have clearance and no interfernce? 

 

A 45mm rad will work with one fan.  If you want Push/Pull you need a 30mm rad.  If you do a 60mm you need to mod it like mine was.  ANything larger would not work at all. 

[brandishwar]

A 45mm rad will work with one fan.  If you want Push/Pull you need a 30mm rad.  If you do a 60mm you need to mod it like mine was.  ANything larger would not work at all. 

 

And on a 30mm radiator, push-pull isn't worth it. I have 30mm radiators all around, and temperatures are not a problem, but I have 3 radiators in my 750D (I've considered adding another 120mm or 140mm radiator to the back, but... no). If you want only two radiators, then go with XT45s, push on both. If you want anything thicker than a 45mm radiator, then it needs to be front-mounted only.

[froobs]

im thinking of a 360mm rad for a cpu+gpu , if thats neough, if not a 280 mm in the front or 240 bottom?

[brandishwar]

Having the 280 or 240 will give a little more headroom for quieting your fans, so I'd recommend it.

[froobs]

Top rad = 360, front 280, does this seem good?

cpu and gpu, will add a 2nd gpu in the future, i suppose a 240mm wont be enough

[brandishwar]

360mm in the top and 240mm in the front will be fine, or if you want to go with a 280mm in the front, that'll also be fine. The 280mm will be more expensive than the 240mm and won't offer significantly better cooling capacity over the 240mm in a loop that will also have a 360mm radiator, but if you want to go with a 280mm radiator, then go for it, but the 240mm radiator will be fine as well.

[froobs]

360mm in the top and 240mm in the front will be fine, or if you want to go with a 280mm in the front, that'll also be fine. The 280mm will be more expensive than the 240mm and won't offer significantly better cooling capacity over the 240mm in a loop that will also have a 360mm radiator, but if you want to go with a 280mm radiator, then go for it, but the 240mm radiator will be fine as well.

sounds good, any quiet fans u reccomend that push alot of air? i feel like 750d front panel restricts it and i do like the front panel on

[brandishwar]

If you want to leave the front panel on, then you can replace the 140mm fans in the front with Noctua fans -- since they'll be hidden by the front panel. Beyond that there's not really anything available that is significantly better than the 140mm fans that come with the case.

 

For 120mm fans, you can go with Spectre Pros, which tend to be quiet -- though I have 5 of them in my case and it still makes a little bit of noise, but not nearly as much as having 5 SP120s. I'm considering undervolting them to quiet things down -- not all the way to 7v as I did some testing and don't like the temperature results. Noctuas are again the best available for 120mm, but they are about $30 each. If looks concern you, again the Spectre Pro is good, and the new fans by EK, the Vardar, show promise as well.