Liquid Flow Rate vs Loop Cooling Performance (restored)

[DazMode]

This is another restored tests which are still usefull.

Experimental review: Influence of D5 pump's flow settings on water cooling loop performance



Follow up review: Influence of coolant flow on water cooling loop performance (Core i7 multi-block setup)

[snef]

great test Daz

i like the idea of having fan with more than 1000rpm
thats why i boughtCorsair SP120

i will try push, pull and push/pull comparison later
now ambient temp here in moncton is to high

we have 36c today

[bungwirez]

smoking hot down here in the GTA as well.

thanks for the data Daz.

[Grey]

I really like keeping my rig silent. I wonder how much additional rad space is required to make up that large of difference from fan speed. For the same cpu temps, how much additional area is required? 50%?

[Hooded]

OK If you haven't figured it out yet I'm new here.

I'm trying to understand these charts but need something cleared up.
What does the t Cores column mean?

I figure it means temps / Cores averaged over the 4 cores of each of the CPU's as they both are multiple cores?

[brechan69]

I do believe "t core" means the average temperature across multiple cores

[Hooded]

H'mm ok I think these pump speeds look awefully low.
Are we sure these aren't GPM (Gallons/Minute) not LPM(Liters/Minute)

[bungwirez]

H'mm ok I think these pump speeds look awefully low.
Are we sure these aren't GPM (Gallons/Minute) not LPM(Liters/Minute)

1 Litre = 0.264 Gallons. Even American manufactures (swiftec) have adopted metric rate standards.

[Hooded]

Still figuring it out LOL

Yes thats correct Bungz but so is this

liter/min. x 0.2642 = U.S. Gal./min.
liter/min x 0.0037 = IMP. Gal./min.

U.S. G/min x 3.785 = liter/min.
IMP G/Min x 4.55 = liter/min.

D5 Pumps
DazMode - DazMode STORM D5 STRONG 8-24V Pump - Max Capacities: 7.5GPM - 28.4LPM
DazMode - DazMode STORM D5 VARIO 8-24V Pump w/TACH cable - Max Capacity 5.5GPM - 20.8 LPM

DDC Pumps
Swiftech MCP 350-02 DDC1 Quiet Water Pump - Nominal discharge (@ 12 V) 1.54GPM (5.8LPM)
Swiftech MCP 355 Water Pump - Nominal discharge (@ 12 V) 2GPM (7.56 LPM)

So I don't see any pumps moving at a trikle like the above graphs shows.
All of these pumps are giving better flow rates than are listed above.
So from what I see in above graph is the the i7 needs a better pump to handle the 6 blocks at a higher flow rate, to get the temps closer to the i5 setups temps.

Yes No?

[bungwirez]

Yes. regardless of the scale, the trend in the graph is toward lower temps and higher pump LPM and higher fan RPM.

[DazMode]

Test was in Liters per minute.

Also note that it is not even a liter difference between CPU only and fully loaded loop.

[bungwirez]

Interesting, cause I would have thought that LPM goes down more than that with increasing restrictions of more blocks.