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Is 1 X 360mm rad enough for a 3090 & 3700x?

Discussion in 'Watercooling' started by Gtiracer, 13 May 2021.

  1. Gtiracer

    Wise Guy

    Joined: 14 Jan 2010

    Posts: 2,280

    Location: Essex

    Will 1 360mm rad be enough for a 3700x and a 3090 or will I need another one do you think?

    I am swaying more toward 2 to be honest, but I'm interested to see others experience on temps with just one
     
  2. darket

    Wise Guy

    Joined: 19 Jul 2011

    Posts: 1,867

    Location: Reading

    1 360 will do the job just fine , but its dependent of the fans and how fast you need them to spin to keep the loop temps at an acceptable level. Personally I'd opt for the second rad and have more radiator surface area, lower fan speeds and a quieter rig.
     
  3. Grim5

    Sgarrista

    Joined: 6 Feb 2019

    Posts: 8,203

    One will be ok as long as both the CPu and gpu are stock or if you even undervolt the 3090. If you plan to overclock either of them you will need two radiators
     
  4. Radox-0

    Mobster

    Joined: 9 Mar 2015

    Posts: 4,139

    Location: Earth

    It will work. Used a 360mm with a 3090 and 9900k in my HTPC build. Temps as you can imagine are not spectacular. Was reaching mid 50's on the GPU and that was with fans running relatively high RPM. Added in more radiator capacity (externally) and dropped that temp by 15 degrees.
     
  5. pastymuncher

    Man of Honour

    Joined: 12 Jul 2005

    Posts: 19,291

    Location: Aberlour, NE Scotland

    It may work but personally I wouldn't do it, especially if it's a thin rad. Temps are going to be poor and you are going to need to run the fans at a higher rpm meaning more noise. Either a pair of very good 280mm rads such as Black Ice Nemesis GTX or a pair of 360mm rads would be the way I would go.
     
  6. MikeTimbers

    Sgarrista

    Joined: 18 Oct 2002

    Posts: 7,759

    Location: New Eltham, London

    yes, not all 360mm rads are equal so which one are you looking at and with what fans. An 80mm thick rad with Deltas will cool great but you won't like it.
     
  7. Gtiracer

    Wise Guy

    Joined: 14 Jan 2010

    Posts: 2,280

    Location: Essex

    Ok, thanks for confirmation, i will deifnately go with 2 rads. the 360 i have is a 30mm one, nothing special, but does the job well on my CPU alone.
     
  8. Evil-I

    Wise Guy

    Joined: 20 Apr 2003

    Posts: 1,283

    Location: Gloucestershire

    I'd go more than 360. 3090 chucks out a lot of heat.
     
  9. Grim5

    Sgarrista

    Joined: 6 Feb 2019

    Posts: 8,203


    Are 80mm thick rads even a thing?
     
  10. D1craig

    Wise Guy

    Joined: 28 Aug 2014

    Posts: 1,996

    Yeah nah. The 3090 needs more than or equal to a 360 rad on its own if you want better than the stock cooler for air...

    Isn't the rule 120mm rad a space per 120watt of power?
     
  11. Grim5

    Sgarrista

    Joined: 6 Feb 2019

    Posts: 8,203

    yeah, which would mean you need a single 360mm rad just for a stock 3090. This doesn't mean you couldn't get away with a smaller radiator or having additional components like the cpu in the loop, however the temps will be high and not much better than any air cooling
     
    Last edited: 14 May 2021
  12. MikeTimbers

    Sgarrista

    Joined: 18 Oct 2002

    Posts: 7,759

    Location: New Eltham, London

    Alphacool Monsta rads. Insane things.