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420 radiator size??

Morgoth

Fueled by Sapphire
Joined
Aug 4, 2007
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Location
Netherlands
System Name Wopr "War Operation Plan Response"
Processor 5900x ryzen 9 12 cores 24 threads
Motherboard aorus x570 pro
Cooling air (GPU Liquid cooling) rad outside case mounted 120mm 68mm thick
Memory kingston 32gb ddr4 3200mhz ecc 2x16gb
Video Card(s) sapphire RX 6950 xt Nitro+ 16gb
Storage SK hynix ssd OS 1tb. Crucial 500gb ssd OS backup. 6tb raid 1 hdd. 1.8tb pci-e nytro warp drive LSI.
Display(s) AOC display 4k
Case SilverStone SST-CS380 V2
Audio Device(s) Onboard
Power Supply Corsair 850MX watt
Mouse corsair gaming mouse
Keyboard Microsoft brand
Software Windows 10 pro 64bit, Luxion Keyshot 7, fusion 360, steam
Benchmark Scores timespy 19 104
i need some help ordering the correct thickness radiator
im going with a 420mm and i get max 57mm clearing if i take a 15mm noctua fan i get 42mm radiator max thickness not sure how mutch clearance for the air is to move trough the fan..
so far i cant find a 42mm radiator. doubt there is one. seen several of 30mm gives max size of 45mm that would give me 12mm of clearance for the air... ( and offcourse other 2 fans wil be standart thickness)
so will 420 30mm tickness be a good radiator size to cool my GPU with and future proof for more heat outputing gpu's if there be any??
1753304090412.png
 
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I used a 3 x 140 fan by (45 x 420) at the top and a 2 x 140 fan x (60 x 280) on the bottom w/ with Phanteks 140mm 150 rpm fans, 10on rads, 5 case fans. Was way overbuilt .... so most of those fans went into other builds and system delta T is still< 10C. All my fans were 25 mm.

The dimensions of the rads are on manufacturers web sites,for example

If I am reading your image correctly, your case only allows below radiator fans and can not be used in push-pull. Again if reading the image correctly those dimensions - the space **below** the radiator. Looking at the text, it seems to contradict the image.

back in the day Martin was my go to source


He provided performance data for various rad thicknesses and fan rpm. I based my selections on the 1000 rpm tests as that's where I wanted to be under most stressful loads. At this point the performance of a 30 and 45 mm thick is not all that great. At 2200, it's 20 watts, At 1800 rpm it's about 12 watts. The difference between a 45 and 30 is about 15 watts (). Assuming comparable fan and radiator characteristics, at 1800 rpm ....

30 mm will get you 242 watts of cooling with a temperature drop of 10C @ 1800 rpm
45 mm will get you 257 watts of cooling with a temperature drop of 10C @ 1800 rpm

Or put another way, all other things being equal, if you were to get a 10C delta T with 45mm your Delta T with the 30 would be 10.6C
 
@Morgoth

What case do you have?
The one in the image doesn't look like the Silverstone SST-CS380 V2 you listed in your specs.

If I were to give examples of AIO rads the usual thickness for those is 27mm. With a regular 25mm fan you have 52mm total thickness. Well actually the screws won't be countersunk so maximum protrusion is 54mm on the screws.

Regarding adequate cooling capacity for flagship GPUs, a 5090 does absolutely fine with a 360mm AIO:
See also the cooler performance comparison.
The specs however list the ASUS at 65mm thick that means 38mm rad + 27mm fans, and the MSI at 55mm thick, which means 27mm rad + 28mm fans.
But the MSI proves you don't necessarily need maximum thickness to top the charts.

You can use this example to calibrate your rad size.
 
@Morgoth

What case do you have?
The one in the image doesn't look like the Silverstone SST-CS380 V2 you listed in your specs.

If I were to give examples of AIO rads the usual thickness for those is 27mm. With a regular 25mm fan you have 52mm total thickness. Well actually the screws won't be countersunk so maximum protrusion is 54mm on the screws.

Regarding adequate cooling capacity for flagship GPUs, a 5090 does absolutely fine with a 360mm AIO:
See also the cooler performance comparison.
The specs however list the ASUS at 65mm thick that means 38mm rad + 27mm fans, and the MSI at 55mm thick, which means 27mm rad + 28mm fans.
But the MSI proves you don't necessarily need maximum thickness to top the charts.

You can use this example to calibrate your rad size.
Its the cs383 that im going to order very soon
 
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Do you have a 5.25" drive? Even then, just get a 30mm radiator + 27mm fan or don't install the last fan.
 
Its the cs383 that im going to order very soon
Ok.
Well about that case I see that the top panel has centered radiator mounting. Coupled with the 65mm total clearance I think you need to be cautious and less optimistic about thick setups (rad + fan). I say that optimal for this case is a 55mm max thickness and 120mm wide, basically a 360mm.

The centered mounting means that the radiator is going to be close to the mobo, not when looking from the side but from the top. It will be especially bad with a 140mm wide rad.
If the setup is thick, it will cover the cutouts in the mobo tray above the mobo, and make it difficult to route cables and manipulate various connectors/plugs.

If you have the time to read my criticism of the Phanteks G500A which has 70mm top clearance and also centered mounting. And I got an Arctic LF3 360 which is 63mm thick and 120mm wide.
Not all of it if you don't want just the paragraph about the top panel.

All I'm saying make sure that after you order the parts and start the assembly you still have a return window for each part just in case you're not satisfied with how everything fits. Else you're stuck with them, like me.
 
Do you have a 5.25" drive? Even then, just get a 30mm radiator + 27mm fan or don't install the last fan.
Yes cd rom burner
 
In the build I referenced earlier which has its own thread. I use cardboard cutouts. I keep a few old components around to "assist" ... I have a large reservoir and my case has a reservoir mounting bracket that is fixed horizontally. I can adjust up and down but not left and right. So I took an old entry level GFX card, cut out a piece of cardboard to the length and width of the GFX card, attached it to the old card and inserted it in the slot. It cleared the reservoir by 2 mm

According to the diagram, as the manufacturer says it fits a 2 x 140 and 3 x 140mm radiator it would appear that the manufacturer seems fine w/140mm rads and fans.

Are you using the same GFX card as in the build listed in your profile ? that's a 391 watt card A 5090 hits 600 watts. The usual target for water cooling is a Delta T of 10C...as you can see in Martins charts a 30 mm Alphacool 360 can deliver 281 watts of cooling but at annoying 2200 rpm. The 45 x 360 =307.

Do you have already have the optical drive ? Will an external suffice ? Was hoping by now we'd see Thunderbolt externals but have not as yet looked for any. Was thinking I might get one for new laptop if they arrive anytime soon.

If you were to get an external opt[cal, you might try the Reeven Six Eyes which can be used to control 6 channels of fans. If you use a Radiator with extra ports like the Alphacool ones I used, you can install thermocouples plugs from Bitspower to dispaly rad fluid temps for rad in and rad out. You can have the remaining thermocouple wired measure HD surface temps inside case temps or anything else with the provided tape.

I have my thermocouples measuring the in and out of both rads (4 Bitspower) , case interior air temp and ambient air. As not worried about SSDs and hard drives directly being the front case fans. But they could be used to control case air flow in and out also or any other componentupon which airflowis directed.

On the downside, usually, you will need a 45 mm rad to get extra ports for liquid temp monitoring. Haven't compared rad performance in years so dunno who sits as king of the hill at the moment, but just for "fit analysis" the 30" from Alphacool is 30 mm thick and w/a 25 mm fan you'd be 55 mm so you should be able to keep your optical.


Notice that in Martin's testing the 360 x 45 rad (307) delivered only 9 % more (28 watts) than the 30 mm (281) one at 2200 rpm. At more comfortable to the ear leavels ... at 1000 rpm the 30 was actually better than the 45 by 1 watt and at 1400 rm it was just 5 watts. In short,you're not missing much with a 30.

When mounting fans in the case,note that in the instructions for Corsair's AIO,thy state to have fresh air blown into the case. Yes we alllearned in 8th grade eart science that hot air rises ... yeah but no when fans are involved. The case is an enclosure ... for every 1 cfm coming in there is 1 cfm going out (condervation of mass law). Questions:

1. Do you want to cool your GPU with ambiant air or hotter inside the case air ?
2. With front case fans and rad fans blowing air into the case, the only way the air can get out is via the rear fan(s) and that grille area with the big holes where it helps blow all the hot air from your PSU AWAY from that cramped space between the case and the wall. If your hi rpm rad rans are removing the heat from your rads by blowing out, where is the air coming in ? yes your presumably lower rpm fans in the front are blowing in ...rare that they will push more air than your 3 rad fans are blowing in do. In most instances, the case will be experiencing negative pressure thereby drawing in air thru the rear grille .... the same air exhaused fromyour 850 watt PSU ?

We started helping people building OCs for colleagues, neighborood families and friends in 1991. We "smoke tested" every build with a spray or incense stick ... almost w/o fail, after letting them install as they wanted, we do a smoke test.
In almost every instance they changed their minds.

Corsair AIOInstructions: "For best performance we recommend mounting the fans as an air-intake intoyour PC case." If you do the Reeven, you can see this yaself.
 

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