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post #301 of 307
Quote:
Originally Posted by TK421 View Post

How do you achieve "equal restriction"?

Identical blocks.
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post #302 of 307
Quote:
Originally Posted by TK421 View Post

How is it possible that he runs the GPU waterblock in parallel? Won't one of the card receive less flow because of water physics?

Don't quote "water physics" if you don't understand "water physics".

Water flows from a point of high water pressure to a point of low water pressure. The flow rate is higher when the pressure differential is higher. This is true of any fluid (i.e. air) and is also true for electricity (replace "pressure" with "voltage" and "flow rate" with "current").

The pump (battery) is the source of pressure (voltage) and each waterblock (light bulb) is a restriction in the loop (circuit) which eventually brings the pressure (voltage) to zero when you reach the reservoir (ground). Tubing (wiring) offers almost zero resistance so any two points connected by only tubing (wiring) are at the same pressure (voltage). This is true at the entrance or exit to both blocks (light bulbs). If the blocks (bulbs) are the same, then the flow (current) through either will be the same.


Now, if you have two in parallel and they're identical, the flow will be split in half exactly, which shouldn't be an issue if your flow is sufficient to begin with. Less intuitively, the overall restriction added to your loop is LESS if the GPU's are in parallel versus in series. This is where fluids and electricity are different: The restriction offered by a block is a function of how fast the water is moving. When there are two blocks in parallel, the flow is split so the water's speed is cut in half. The viscous friction is non-linear so cutting the speed in half drops the friction factor by 1/4.

What is surprising then is that your flow rate is higher if your GPU's are in parallel so you actually get a bit more than "half". The GPU's are still in series with the rest of your loop though, so the impact is small.

4-way GPU's are usually in semi-parallel with 2 pairs of parallel GPU's in series with each other because 1/4 flow rate is probably a bad thing unless you have two pumps or a completely separate GPU loop.


(Source: two fluid dynamics courses and one Hydraulics course in a Mechanical Engineering Program)
Edited by YawMawn - 4/17/15 at 12:09pm
post #303 of 307
[Double post: hit quote instead of edit. Please remove]
post #304 of 307
Quote:
Originally Posted by snef View Post


Hey Snef,
This is a fantastic build you have. So, I've been away from the modding scene for years, and I've never seen these fancy little plastic cable guides you have shown here. I see something like it at dazmode but it doesn't come over the top, making a sort of loop. I was wondering, where do you pick something like that up? Thanks man, and really, a beautiful build.
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post #305 of 307
Quote:
Originally Posted by snef View Post

loll thanks guys


Nothing to do this morning

why not share more pics


















so most of the above pics are taken from a macro lens or u are using the kit lens that came with the camera , superb shots , do enlighten us on how u take ur shots
post #306 of 307
Thread Starter 
Thanks

im not sure of witch lens I used, sure its not my Macro, 95% is the lens in the kit (18-55mm)

the most important thing is a tripod, and for light source, I use cheap table light from Walmart with 5000k light bulb

the rest is where you put the focus point and all things like that
post #307 of 307
Quote:
Originally Posted by jadawgis732 View Post

Hey Snef,
This is a fantastic build you have. So, I've been away from the modding scene for years, and I've never seen these fancy little plastic cable guides you have shown here. I see something like it at dazmode but it doesn't come over the top, making a sort of loop. I was wondering, where do you pick something like that up? Thanks man, and really, a beautiful build.

In the UK, E22 carry them. Called stealth combs.

J.
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