My New Water Block

[Silversinksam]

DViper,

If they had a Socket 478 version of the Gemini, or a suitable way of holding it down, I would have absolutly ordered one of those Gemini's without giving it a second thought.

 

[rivercom9]

DViper, are the Gemini blocks backlogged like the Spir@ls?

 

[meatpipe]

I also have one coming-(high flow version).I spoke to Peter over a week ago, and again today, should be here be Wednesday. Cant wait-I'll add one more to the collection. The price is right, I think I' ve spent money on more foolish endeavors than this!!!

 

[Lt. Max]

is there a difference between low and high pressure ones? except price?

and why do the gemini only use 1/4 inch fittings? isnt that kinda small? , considering most ppl use 1/2 inch ones.

 

[DodgeViper]

The High Volume looks to be 1/2" thick.

High Volume has 3/8" barbs. Changing mine to 1/2"

Low Volume has 1/4" barbs.

Peter is working on a block for the 478s.

Backlog? You need to call Gemini and ask for Peter Jr.

 

[Lt. Max]

i see, how will u b doin yours to 1/2?

 

[DodgeViper]

Having already purchased silicon tubing in 1/2" and the barbs on the rad are 1/2" I ordered barbs from McMaster that will fit the thread hole to 1/2" nylon barbs. Personally there is not much difference in 3/8" and 1/2" in flow. I decided to change only for the reason mentioned above. Look at Hoot's review. The High & Low Volume blocks having different size barbs changed nothing in temps. Although I will be using a high flow rate pump I may see some changes.

 

[Hoot]

I did not realize they made a 1/2" ID barb that would screw into the threaded hole for 3/8" ID barbs. All the 1/2" barbs I saw at Menards had much larger diameter threaded shanks. Those ones you found must be special.

Hoot

 

[racecar12]

Hey racecar, how much did you get your spiral for? From where?

I was kinda there in the begining with fix when he started making them and this is block #3.

Now back to redigest those temp readings on that Gem

 

[NoKtEm]

whoa, looks very sweet... is there possibly a spot for a peltier or two on that thing?

 

[Doc_T]

I ordered mine on Friday looks very promising

 

[meatpipe]

Pete from Gemini told me the blocks were tapped using 1/8" NPT.
McMaster-Carr has barbed fittings using 1/2" barbs and 1/8" threads, part#5372K115. I believe they are $3.50 for 5. I'm not sure the barbs are worth changing, as the ID must be pretty small to accomodate the 1/8" thread size...

 

[Tecumseh]

I have been reluctant to post Hoot testing, but seeing that its already on someone website that sells the Gemini WB I decided to post what Hoot sent me.

Here's a sneak preview:

Pump: Eheim 1048 (158gph)
Radiator: D.D. Heater core (low pressure drop)
Tubing: 3/8" ID Silicon
Vertical lift: 4 inches (insignificant)
All Water Blocks 3/8" ID straight hose barbs
All Water blocks inlet water temperature 25C
CPU: Athlon XP1600 12.5x145 (1822 Mhz) @ 2.05Vcore = 112.5Watts

Gemini High Flow Core Temperature=41C Efficiency=.14c/w (consistent)
Gemini Low Flow Core Temperature=41C Efficiency=.14c/w (consistent)
Swiftech MCW-462u Core Temperture=43C Efficiency=.16c/w (consistent)
D.D. Maze-2 Core Temperature=45C Efficiency=.17c/w (best of three tries)

I was totally surprised by the results, especially the Danger Den Maze-2.
I was equally surprised that the Gemini Low Flow block did as well as the
High Flow block, considering the slower flow rate that the 1/4" channel
causes. (120GPH vs 158GPH)

Guys, the temp reported for the DD Maze-2 in NOT consistant.
If you take the C/W, power and ambient temp, you get
44.1C NOT 45C. ------------Must be a typeo

 

[Aesik]

I hate to be a fly in the ointment, but until I see a series of tests between the two blocks, I just can't accept saying that one is 4 degrees better than the other. At a very bare minimum 3-5 runs of each block (mounting and unmounting for each test) should be run before even considering the results to be anywhere near valid.

After having a few conversations with others and doing a few rough calcs on the accuracy of testing with high-end equipment, 4 degrees could easily be within the margin of error. I posted more thoughts on temperature measurement here:

http://forum.oc-forums.com/vb/showthread.php?s=&threadid=71023

I still believe we have a ways to go to come up with a more reliable way of comparing any cooling systems. Lots of work by a few individuals is being done out there, but for now there are still too many issues to definitively call one block better than the other.

 

[G33k]

I think on average the SYSTEM flowrate of typical WC rigs
is between 140 and 160 GPH.

hehe, with my Eheim 1046 I get 240 through my system!!

[Edit]Oops, my bad! That's 240L/H which equates to ~50GPH LOL[/Edit]