In the past (the much distant past), Overclockers Hideout had a rep similar to that of OCZ and OCWC... they had lots of leaking products, downright dumb designs, and problems with reservoirs and pumps. They have definitely turned around, at least somewhat, in recent history. I'm sure their products don't perform too poorly.
-Kevin

one thing i like about the swiftech is the mounting system, very fool proof.

it's high quality, in that it won't leak or have goop over it or whatever, but with that rad and that block, I'm sure the performance will suck. (and it does, .40c/w, worse than an amd retail heatsink)

Thanks guys... I ordered couple of samples from CPUFX and will see myself before start doing business with them...
Their reservoir looks pretty nice, it looks really good installed in an aluminum case...
but don't know about the 12V 500GPH submersible pump they're using...

it's a bilge pump, it will die within a month if it is run constantly

Ok Brad I'll check it out...

You don't like these CPUFX too much I guess ;)

12V pumps are also supposed to be a good bit louder than their AC counterparts.

I hate cpufx, go to the [h] forums, and search for a u/n called 'hardware' (I know I've said this before, but do it again ;) )

Ok everyone, I got some news for you... I was on the phone with Swiftech yesterday. and Gabe is currently testing his prototype blocks with 3/8 ID and 1/2 ID. He didn't decide on 1/2 ID yet, but if he sees any performance increase he'll build them...
He told me that he's going to make the hard data publicly available...

Take care,

Bruce

Bruce, I hope things go well for you.
I sound like you have a good biusness plan, I can tell you from experiance, that it is not easy. I hope you can handle the work load involved. It sounds like you can.

I know I would like to see a band of small guys (like me) pitch in to help growing companys. Wish I had the time, but I am swamped right now.

I will offer you this. if you have an idea you would like tried out before you take it to market, keep www.custom-cooling.com in mind. jaydee and I are working on a few projects. We can maybe come up with some good designs and offer them out.

its just a thought. I love helping out when i can.

Good luck, and I hope to see you raking in the millions...........

Thx Robert... my partners and I are trying to do the best we can.

man, i know you're full of ideas and I'm sure jaydee and you will come'up with great designs.

Well you got my e-mail address and other info.
E-mail me and let's talk about what we can do together.

Take care,

Bruce

Ask Gabe to release his test data that shows those Hayden tranny coolers outperform everything else on the market (he'll tell you that if you ask). Gabe is a nice guy but his job is marketing and sales...

pHaestus - remember we all ranted about 1/4" and asked from him to put bigger fittings on his blocks. he made them finally, and right now he's testing them... the only thing is he doesn't like 1/2" hosing, and he doesn't believe that little performance increase worths garden hosing the system... well i can't blame him :) so the test data he's talking about is 1/2" VS 3/8"...

Of course you can always just go with a bigger pump to get the flow rate up on 3/8" tubing :D

absolutely :)

that isn't terrbily efficient though in terms of space or heat production. If I can use larger tubing and fittings along with a smaller pump to get the same flow rate as a larger pump and smaller tubing and fittings then I will always go that route.

I heard that actually swiftech is going to manufacture blocks with 1/2" sometime soon... some little birds told me :)

pHaetus - I would tend to agree if you are building a new system and the larger tubing doesn't cause any issues. But in this case if someone has an existing system with smaller hose and can't easily upgrade the fittings, then it can be a more viable alternative. ( which was the point :)

well guys actually i'm kinda tired of this all 1/2" issue... i'm so tired that I decided to try and see the difference myself...
I'm really wondering how many degrees it will differ over the 3/8" setup with same parts?

There is no "one size fits all" answer Al :) It very much depends on the system as a whole. Take 5 different systems with different components and they will react differently. Some blocks perform much better with higher flow. Some don't. One system may have 2x the heat load as another. One pump may hardly be affected by the reduced tubing size, another be affected greatly. Etc, etc, etc.

About the only thing that can be universally said is larger tubing will lower the pressure loss through a system and will extend the life of the pump and increase flow rates as a result.

But the degree of affect and type of affect on the cooling performance of the system depends on many variables.

pH did an article on VYW, from memory his temps dropped by a couple of degrees

well here's I what got from cooltechnica... I'll be getting the Xtreme in March...

DD Maze2-1 w 1/2" fittings and 3/8" fittings
Black Ice Xtreme (chrome plated schweet:) )
Eheim 1250 (+RC Tank res)

so I'm going to try straight watercooling with 1/2" vs 3/8" with the same parts in the beginning with XP1800+... then I'll try to test with a heat load coming from the 226W pelt and XP1800+...

let's see if there will be a big difference... or any diff. at all...

Why not just use a valve as a way to put a known restriction on the flow combined with a flowmeter? There is no real reason to replumb everything and test separately.

As mentioned, the results will depend on the radiator, the pump, and the waterblock chosen. The goal should be to optimize everything for a complete system and not to just choose impressive parts. Here is a graph from some of my playing around with my setup:

http://phaestus.procooling.com/gpmvary.jpg

This is an Eheim 1250, a Maze2, and a 1975 Caprice core cooling a 1600+ XP. Temps were taken with a MAX6657 diode reader.

The GPM is varied with a ball valve and measured with an inline flowmeter from McMaster-carr. What you can see is that there is a fairly substantial change in delta T from 0.4 GPM to 1 GPM. However, above 1.1 GPM, there is no real benefit to increased flow rates with this setup. Now from experience, a 3/8" tubing and fittings loop with a heatercore and a Danner 250 was right around 0.75 GPM, and the same setup with 1/2" fittings and tubing was around 1.1. You can expect for this to be reflected in a performance increase. However, switching from a 1250 to the 1060 might actually worsen performance, as the block seems to already be performing at max efficiency and increasing the flow over 1.2 GPM will only serve to decrease the residence time in the radiator.

I said this earlier and I will say it again. I would prefer to use larger tubing and excessively large/drilled out fittings and a smaller pump to get to 1.1 GPM rather than fighting the resistnace and friction of small tubing and fitting by adding a larger pump. I actually hope to move down to an Eheim 1048 in my project case...

This's great pHaestus... thx...

I'm checking the flowmeter... what type of valve did you use?

Here's a pic of my setup:

http://phaestus.procooling.com/test_setup.jpg

Just a big ball valve and some 1/2" NPT x 5/8" barbs. The flow meter has the same in it now (at that time it was copper pipe reducers). I think that the ball valves and this flowmeter might not be good enough for real precision work, but for the kind of data I just presented above it works fine.

looks nice :)

thx for the tip man...

The total time a particular water molecule stays in a radiator is always the same no matter what the flowrate is, just as long as there is flow rate of course =].
Now if I can only think of the formula for that....

Doesn't conservation of mass cover that one? I've been puzzled by the changes in radiator performance as a function of flow rate. The argument that the water spends more time in the radiator at low flow rates just makes no sense to me at all since this water is circulated in a loop. Could it be the characteristics of the flow change with flow rate?

Thanks for any information!

They mean the water coming from the proc etc. that is hot, not water in general.

But the more you increase the flow rates, the less heat is transferred to the water from the proc. For decent flow rates, the temp difference between inlet and outlet of the water block is practically zero.