Hi,
New here. Need some advice on a new build. Ive got:
i9-9990xe
64gb (4x16gb) Trident Z Neo 3600mhz 14cas
2x EVGA RTX 3090 FTW3 ULTRA
ASUS Rog Rampage VI Extreme Encore x299
2x Intel Optane m.2 in PCIE Bifurcator Raid 1 setup
4x WD 10TB Enterprise Gold HDD Raid 10 using LSI card
1600w Thermaltake PSU
1100w Dell T7500 PSU
Thermaltake 20XT case
Originally I planned tonrun 4x 480mm Alpha Radiators with Noctua Fans in a push pull config. But was warned that the cpu when pushed can hit 500w, and with 2x 3090s my heat will be significant. I want to stay above dewpoint so im not looking at phasechange refrigerant. So I was told by more than one person that I should consider a chiller.
I have 2 issues:
1. I hate water (actually designed a datacenter utility patent as a water free cooling solution).
2. A single chiller would have to be quite large without inline radiators, and unless i find a 100% duty cycle scientific/industrial chiller, I likely would be better with a dual variable speed compressor system or 2 seperate chillers (doubling capacity and redundancy).
If i add up all the power at full OC im probably going to be around 1700w before cooling solution. I plan to run the GPUs off the 1100w PSU and the rest off the 1500w.
I believe a 1/2hp chiller wont be enough. Im consodering using 2x 1/4hp hp to keep the loop running at all times at least at 1/2 capacity, or Id need to use a remote insulated tank to cover the lockout time before the compressor kicks back on. I actually think doing a hybrid solution will work best though, using the chilled water directly on the CPU, board, vrm, ram, HDD bay using say 1/4hp chiller, then 2x 480mm radiators to strip some heat, then put another 1/4hp inline before the GPUs, with 2x more 480mm radiators before reentering chiller 1. Id use some sort of timer to set the chillers to not both cycle off at the same time sonat least i have 50% chilling capacity along with the radiators to halve the rate of rise. Should i oversize the chillers to dual 1/3hp so Im not completely loading them or is that overkill?
Secondly id prefer to not use water. Id love to find a non conductive, low viscosity refrigerant that has similar heat absorbtion to water or i can oversize a pair of pumps in the chillers to compensate.
Ive played with mineral oil immersion for crypto mining but unless i use industrial oil pumps i dont see that as a viable solution. But what about low viscosity gear oil (mineral oil),, or some engineered fluid like Novec 7500? With the cost in this system already, buying a 12lb bottle of novec isntgoing to beeak the bank...though id prefer a cheaper option if possible. The Novec is also fine on copper and plastics.
If anyone has ideas or suggestions Im all ears. I still wonder if i cant just use 4x 480mm and then run the GPUs with hybrid aio kits in the front and rear, but with the money ive already got in this Im not looking for a shortcut now.
New here. Need some advice on a new build. Ive got:
i9-9990xe
64gb (4x16gb) Trident Z Neo 3600mhz 14cas
2x EVGA RTX 3090 FTW3 ULTRA
ASUS Rog Rampage VI Extreme Encore x299
2x Intel Optane m.2 in PCIE Bifurcator Raid 1 setup
4x WD 10TB Enterprise Gold HDD Raid 10 using LSI card
1600w Thermaltake PSU
1100w Dell T7500 PSU
Thermaltake 20XT case
Originally I planned tonrun 4x 480mm Alpha Radiators with Noctua Fans in a push pull config. But was warned that the cpu when pushed can hit 500w, and with 2x 3090s my heat will be significant. I want to stay above dewpoint so im not looking at phasechange refrigerant. So I was told by more than one person that I should consider a chiller.
I have 2 issues:
1. I hate water (actually designed a datacenter utility patent as a water free cooling solution).
2. A single chiller would have to be quite large without inline radiators, and unless i find a 100% duty cycle scientific/industrial chiller, I likely would be better with a dual variable speed compressor system or 2 seperate chillers (doubling capacity and redundancy).
If i add up all the power at full OC im probably going to be around 1700w before cooling solution. I plan to run the GPUs off the 1100w PSU and the rest off the 1500w.
I believe a 1/2hp chiller wont be enough. Im consodering using 2x 1/4hp hp to keep the loop running at all times at least at 1/2 capacity, or Id need to use a remote insulated tank to cover the lockout time before the compressor kicks back on. I actually think doing a hybrid solution will work best though, using the chilled water directly on the CPU, board, vrm, ram, HDD bay using say 1/4hp chiller, then 2x 480mm radiators to strip some heat, then put another 1/4hp inline before the GPUs, with 2x more 480mm radiators before reentering chiller 1. Id use some sort of timer to set the chillers to not both cycle off at the same time sonat least i have 50% chilling capacity along with the radiators to halve the rate of rise. Should i oversize the chillers to dual 1/3hp so Im not completely loading them or is that overkill?
Secondly id prefer to not use water. Id love to find a non conductive, low viscosity refrigerant that has similar heat absorbtion to water or i can oversize a pair of pumps in the chillers to compensate.
Ive played with mineral oil immersion for crypto mining but unless i use industrial oil pumps i dont see that as a viable solution. But what about low viscosity gear oil (mineral oil),, or some engineered fluid like Novec 7500? With the cost in this system already, buying a 12lb bottle of novec isntgoing to beeak the bank...though id prefer a cheaper option if possible. The Novec is also fine on copper and plastics.
If anyone has ideas or suggestions Im all ears. I still wonder if i cant just use 4x 480mm and then run the GPUs with hybrid aio kits in the front and rear, but with the money ive already got in this Im not looking for a shortcut now.