Water cooling diagram???

Your setup looks just fine. But you said you have decided the "RAM" should be inside the case. I think you meant the "RAD"
If you can set the "RAD" on top of the case it would help you achieve lower temps as the air flowing through the RAD will be cooler.

Basically you want the following loop order (which I see you already have):
Reservoir -> Pump -> Radiator -> CPU Block -> GPU Block

You might also want to consider adding a Y-Splitter to split the water coming out of the Radiator equally to the CPU and the GPU.
Then when the water comes out of both the CPU and GPU you can also use a Y-Splitter (inverted this time) to channel the water to the Reservoir.

Hmmm thats right!! why didnt i think of that.. so im going to need 2 y splitters...

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The advantage of splitting is less load on the pump, and greater flow overall. The disadvantage is that if one waterblock is more restrictive than the other, flow will be unbalanced and cooling could be uneven.

The challenge would be figuring out which one is restrictive, and balancing flow if needed--perhaps by seeing which one is hotter, and constricting the flow to the cooler one.

Just something to think about...

Have fun!

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I get what ur saying i actually thought of that too, its basically same as a paintball gun. AIR will take the first available hose so i was assuming water would do the samething, the only thing i can think so the cpu would have enough water was use a small barb and hose fitting going to the vga. so the flow bottle necks where the "Y" slipts. well not really bottle neck but slows down since a smaller diameter hose/barb is going to the VGA. however on my first diagram cpu in and out to the vga how hot is that water going to the vga. would it be alot to affect cooling my vga?

sorry mates. i think i would have to differ on this. when u have a single loop for the gpu and the cpu, there is no such thing as different load on the pump. the load in terms of flow remains the same. what changes is the pressure drop. the pressure drop over two blocks namely the gpu and the cpu would most definitely be higher than the pressure drop across just the cpu. the pressure drop over the setup of cpu to gpu then to reservoir would be a lot more than either of the above. but then since u have a reservoir the pressure drop doesnt matter at all because the reservoir acts as a buffer zone providing the necessary head for the suction of the pump. therefore the pump will still start at the same point. of course if u were not to have a reservoir things would be different.

as for greater flow from splitting the flow there exists no such thing. the flow of the pump is determined by the design of the pump and not the flow patterns. no matter how u direct the tubes, the flow will remain constant for any particular power consumption. what changes is the pressure drop.

Something like this right? Im assuming water/ liquid has the same principle as a "BRAKE LINE" once it has been bled the flow of liquid should be fine no matter how it has been splitted without adding a valve. Or am i wrong? And if the problem with with my first diagram is the load on the pump wouldnt it be better if i add a small pump inbetween the cpu and vga, so the flow from the cpu out going to the vga input would be faster?

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I must respectfully disagree!

For any pump at a given voltage, flow goes down as head pressure (usually measured in feet of water) goes up. And head pressure goes up with increased resistance to flow.

Here's an example graph, from Dangerden:

http://www.dangerdenstore.com/files/...d_gpm_500w.jpg

And, for a given system, head pressure increases as flow resistance increases--from things like increased total tubing length, reduced tubing diameter, and constrictions in the system like waterblocks and tubing connectors.

Short form: more waterblocks in series ==> greater total tubing and constriction ==> greater flow resistance ==> less flow.

Perhaps a thought experiment will make it clearer: take a system (with a reservoir) that is functioning at a given flow rate, and kink a hose so that it is blocked (infinite resistance to flow). By your logic, total pressure drop would remain the same, along with flow. But we know that's not the case, and flow would stop.

Putting in additional waterblocks is like putting a constriction in a hose--not total blockage, but resistance goes up, and flow goes down.

Make sense?

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You understand, same idea--restricting water flow. I'm just suggesting something adjustable, since I dunno how you'd be able to pick the right barbs and tubing to balance things.

I'd think you'd want to fiddle around, tweak, while watching cpu and gpu temps. I know that's my idea of fun. Really!

But it is kinda fiddly, and the barbs for the y-connections restrict flow, taking away some of what you're trying to gain by running waterblocks in parallel. And you're adding more parts and connections, which increases your likelihood of leaks.

That's why I just stuck with series operation. And if series was too much of a load on my dinky pump (doesn't seem so), I'd just buy one of those DangerDen pumps I'm coveting.

ok mates i wasnt here yesterday so let me try to reply now to the disagreement. first lets start with some common definitions. all definitions are excerpts from Perry's Chemical Eng.s Handbook Rev. 7.

Total dynamic head - is total discharge head minus total suction head
Static suction head - the available head of liquid presented by a liquid level at the suction of a pump
Static discharge head - is the produced head presented by the net height of liquid level
Friction head - the required pressure to overcome the resistance in a flow piping and fitting.

Work performed in pumping. (page 10-23 of Perry's)
To cause liquid to flow, work must be expended. A pump may raise the liquid to a higher elevation, force it into a vessel at a higher pressure, provide the head to overcome pipe friction, or perform any combination of the above. Regardless of the service required of a pump, all energy imparted to the liquid in performing this service must be accounted for; consistent units for all quantities must be employed in arriving at the work or power performed.
having quoted the above, lets look at the following equation from the same page.

kW = HQ(ro) / 3.67x100000 ; (ro) is the density of the fluid being pumped.

in this case, kW is the power output of the pump, H is the total dynamic head and Q is the capacity of the pump. looking at the above equation, one should be able to realize that the density of any given fluid remains constant over all temperature conditions generally excepting for Newtonian fluids. then the power output of the pump can never exceed the power input for the pump multiplied by the efficieny of the pump. therefore the power output of the pump pretty much remains the same. as such what CAN change? the head and the flow can change. but then every pump is designed for a maximum flow for any given head. meaning when a mfg says max head of 3m and max flow of 400l/hr they mean the pump can achieve both the head of 3m and 400l/hr but not necessarily at the same time. it could probably reach a head of 3 m at 100l/hr or a flow of 400l/hr at a head of 1m. so what you are conjuring at this point is more or less correct. but then it is not accurate since you are omitting the fact that the head is constant.

the Static head of the system remains the same under any conditions unless you change the locations of the components. so now we only have a flow which can change according to the power output which is already shown to be constant. therefore for any given power consumption for any particular fixed system the flow will remain constant. this is the reason why in industrial applications, a VFD (variable flow drive) is utilized to control flow at different power consumptions. either that it is so much more common to utilize control valves to control flow by inducing a stop flow.

under no circumstances does the total head increase due to resistance unless u r talking about the friction head which would result in net drop of the Static discharge head and NPSH.

as for the graph remaining the same for all fluids u might want to think about compressor flow, piston pumps and two phase flow.