Water Temperature & Pressure Guidelines?

[Daharen]

Looked around for this, I'll gladly delete this thread if it's posted somewhere, but I can't seem to find a good consistent answer. While I'm fairly certain I'm more than fine and have nothing to worry about, I do want to know anyway what is generally considered tolerable water temperature fluctuation for a custom loop, what the pressure failure is for most soft tubing custom loops, and what other people tend to get their water/coolant up to when doing overclocked gaming? 

As I said I'm more interested in 'general' answers then answers concerning my particular build. However, if this is one of those 'it depends' categories, then I'll go ahead and post the details (Though as I said, I know I probably have nothing to worry about):

- EVGA RTX 2080 ti FTW Ultra @ 2,205 MHz GPU Clock/8,200 MHz Memory Clock (1.094v/420w Max)
- 8700k Silicon Lottery 5.3 Approved, Delidded, Direct Die Cooled @ 5.2 GHz (1.44v/145w Max)
- EVGA HydroCopper Waterblock (Replacing GPU Block)
- Fujipoly 17w/mk Thermal Pads (Replacing All Stock GPU Thermal Pads)
- Ice Delid Die Gaurd Intel 6/7 Series
- EKWB EK-Supremacy EVO CPU Waterblock, Copper/Plexi
- Thermal Grizzly Conductonaut TIM (CPU Direct Die & GPU)
- Phobya Dual 5.25" Bay Reservoir V2 (2 Liter Reservoir)
- EK-DuraClear Soft Tubing 3/8"-1/2".
- The Koolance PMP-500 Water Pump (Always Running @ 4,350 RPM)
- 1 x EK-CoolStream XE 480 (Quad)
- 1 x EK-CoolStream XE 360 (Triple)

- 2 x EK-CoolStream XE 240 (Double)

- 1 x EK-CoolStream XE 120 (Single)

- 12 x Noctua NF-A12x25 PWM Fans (Always Running @ 2,000 RPM)
- Phantek Primo (No Side Panel, Top Metal Mesh Removed, Front Metal Guard Removed, Side Panel Opened)
- Ambient Temperature 20.5c - 21.5c

(Not Likely THAT Relevant But Smooth Power Delivery Can Have a Negligible Impact on Thermals):
- Gigabyte AORUS Master Motherboard
- EVGA SuperNova 1600 T2, 80+ Titanium
- CyberPower PFC Sinewave UPS System, 2000VA/1540W, AVR (Plugged into a 20a/120v Outlet)

So far the most intense game for the system as a whole has been Metro Exodus with everything completely maxed out. During game play I get the following readings:

- Water Temp Average Idle Before Play 22c
- Water Temp Average During Play 29c
- Water Temp Max During Play 31c
- Average Total System Power Draw 585 W
- Maximum Total System Power Draw 882 W
- CPU Average Idle Before Play 29c
- CPU Average During Play 42c
- CPU Max During Play 62c
- GPU Core Average Idle Before Play 29c
- GPU Core Average During Play 52c
- GPU Core Max During Play 60c
- GPU Mem Average Idle Before Play 30c
- GPU Mem Average During Play 58c
- GPU Mem Max During Play 65c

The question if it 'depends' and doesn't have general guidelines is, how much do I need to worry about repeated pressure cycling with 10c delta in a waterloop? Does this pose any issues where I'll need to look at replacing the loops tubing on some sort of regular interval, or is this a low enough delta that it's unlikely I'll ever really need to replace the loop before replacing the computer? What deltas are other people getting? What are the tolerable deltas? Do I need to bother with a pressure release valve or anything, or is that only really necessary when you don't have a ton of radiators to prevent extreme temperature fluctuations? 

[For Science!]

Your loop is fine. The question is invalid since you have not specified what delta you are talking about. For soft tubing it is recommended to replace tubing on a regular basis anyway, usually coinciding with loop maintenance or every other loop maintenance.

[Mick Naughty]

Never seen pressure cause any specific issue in a custom loop. Could add a breather if you are concerned. Or have minimum air in the system. 

 

 

[fabafaba]

6 hours ago, Daharen said:

The question if it 'depends' and doesn't have general guidelines is, how much do I need to worry about repeated pressure cycling with 10c delta in a waterloop? Does this pose any issues where I'll need to look at replacing the loops tubing on some sort of regular interval, or is this a low enough delta that it's unlikely I'll ever really need to replace the loop before replacing the computer? What deltas are other people getting? What are the tolerable deltas? Do I need to bother with a pressure release valve or anything, or is that only really necessary when you don't have a ton of radiators to prevent extreme temperature fluctuations? 

You don't have to aside from regular replacing of the tubes, as @For Science!already said. The pressure itself also won't be a problem, I have my fans set up to keep the water at a 8°C delta over ambient, and my loop didn't explode yet. I'm also sure that a soft tubing loop is more tolerant to pressure increses than a hardline one like mine, because the tubing can expand a little bit and soft tubing compression fittings also hold on to the tubing way stronger than hard tubing fittings do.

The aquacomputer forum allows to put a livefeed from aquaeros in the users signatures, and there I usually see deltas from 5-15°C, and some AIOs run even hotter at up to 20°C over ambient. A 10°C delta really is fine.