Adding a GPU and NB block

psychofunk · 12-21-2003, 09:51 PM

My CPU block is a white water and I was thinking that maybe I could run pump>rad>cpu block>gpu & nb>pump, etc. The cpu block has 2 exhausts so I was thinking one to the gpu the other to the nb and both to a Y and to the pump and start the cycle all over. Would that be okay? Anyone tried it? What works best in your experience?

killernoodle · 12-21-2003, 11:20 PM

If they the 1/2" Dtek GPU and NB blocks, this would work very well because they are essentially the same block and therefore would cause almost equal restriction. Water would be split fairly evenly between the two. It would be even better if you could keep their lines seperate until you got to a resevior or something, but it doesnt look like you have one in your system. Having them inline will create more restriction than keeping them seperate after the whitewater, thereby improving temps for the CPU. Also, the NB and GPU dont produce nearly as much heat as the CPU, so you should be alright in that category. I'd say go for it.

psychofunk · 12-22-2003, 01:55 AM

I was actually thinking of going with the swiftech gpu and nb blocks as they seem to have no/little restiction. Are these a bad choice to go with for this setup?

fhorst · 12-22-2003, 02:48 PM

LOL

All blocks are OK, just as long as they have "equal" restiction.

You are planning to use them after the WW anyway, so the type of blocks does not matter that much in this case.

Joining the outlets prior to the NB would gain a bit on the NB and GPU (1 degree e.g.) and you loose some on the WW.

Leaving the WW split, would gain a bit on the WW, but you lose a bit on the NB/GPU.. (as the flow is devided in half)

I'm not sure with keeping the 2 tubes till the res. 2 hoses have 2 times the wall surface, giving a but more restriction. But as it is spilt, the friction will be less. It just might be equal.

psychofunk · 12-22-2003, 11:57 PM

Ahhh! I got it. The similar restriction refers to the gpu and nb only not incl the ww. The point being to not cause some sort of back flow or uneven flow out of the ww. Right?

Any other ins and outs that a noob like me might subject to myself because of my ignorance???

fhorst · 12-23-2003, 03:05 AM

LOL (again), when it comes to watercooling we are "all noobs".
(Except a few specialists) But yeah, the key is to prevent to much "back pressure" and to divide the flow as equal as possible.

But it still isn’t rocket science.
Having a bit more flow at one side, doesn’t mean you’ll get real bad results.
The biggest issue is still to prevent leaks and the use of elbows

killernoodle · 12-23-2003, 08:52 AM

What kind of pump do you have. If you have a weak/low flow pump, it is likely you will have uneven flow.

fhorst · 12-23-2003, 11:39 AM

?????????? :shrug: ??????????

Even with a 1 gph pump you won't get this...
If the pump is real weak, and it won't give pressure inside the WW, you might get an uneven dividing of flow, but that is in that case a design/manufacturing mistake.

If I'm correct (has been 20 years ago since I had this stuff) we are dealing with the law of Pascal.
<<Pressure is the same in all directions.>>
This also goes for the two outlets of the WW.
Any difference in the pressure is a design mistake, letting the Jet pushing more water to one side.

You will only see it more clearly with less waterflow

mmakay · 12-23-2003, 04:15 PM

Quote:

Originally posted by fhorst
?????????? :shrug: ??????????

Even with a 1 gph pump you won't get this...
If the pump is real weak, and it won't give pressure inside the WW, you might get an uneven dividing of flow, but that is in that case a design/manufacturing mistake.

If I'm correct (has been 20 years ago since I had this stuff) we are dealing with the law of Pascal.
<<Pressure is the same in all directions.>>
This also goes for the two outlets of the WW.
Any difference in the pressure is a design mistake, letting the Jet pushing more water to one side.

You will only see it more clearly with less waterflow

Yes, the pressure would be equal, so the route with greater restriction would have reduced flow. It's just like electronics....voltage (pressure) is constant, but current (flow volume) varies according to resistance (restriction).

I'm not sure whether unbalanced flow would signifigantly effect performance (due to the jet design). Cather should be able to say, though.

fhorst · 12-23-2003, 06:41 PM

Jep, we need Cathar!

Not only will he be able to tell us if the "delayed" split ater the WW is a good setup (better then combining the spilt, and then let it flow through the NB and then GPU block), he could also tell is if the jet was designed for equal flow. (My best guess is that it is)

Cathar · 12-23-2003, 07:02 PM

Equal flow works best. Blocking off one outlet totally will reduce performance by around 1.5C or so, with the actual performance hit for splitting the flow unevenly being some middle point between 0-1.5C worse depending on how uneven it gets split.

fhorst · 12-23-2003, 07:44 PM

Thank you for the reply!

Just one question in mind. Having the split going through the other blocks first prior to joining them together, will give a bit less "backpressure" then placing them after each other.

Will this improve the performence?

Cathar · 12-23-2003, 09:30 PM

Quote:

Originally posted by fhorst
Thank you for the reply!

Just one question in mind. Having the split going through the other blocks first prior to joining them together, will give a bit less "backpressure" then placing them after each other.

Will this improve the performence?

Marginally, at the expense of lost performance for the two blocks due to lower flow rates through each.

fhorst · 12-24-2003, 12:35 AM

OK thanks Cathar!

psychofunk · 12-24-2003, 04:27 AM

Quote:

Originally posted by Cathar
Marginally, at the expense of lost performance for the two blocks due to lower flow rates through each.

So does that mean that the best route is to combine to the one and then go to the nb and then the gpu?? I guess that would be series??? BTW my system is listed on my sig just click below, if your into choppers the pic is worth the click.

12-21-2003, 09:51 PM	#1
psychofunk Cooling Savant Join Date: Jan 2003 Location: Los Angeles Posts: 365	Adding a GPU and NB block My CPU block is a white water and I was thinking that maybe I could run pump>rad>cpu block>gpu & nb>pump, etc. The cpu block has 2 exhausts so I was thinking one to the gpu the other to the nb and both to a Y and to the pump and start the cycle all over. Would that be okay? Anyone tried it? What works best in your experience?

12-21-2003, 11:20 PM	#2
killernoodle Thermophile Join Date: Sep 2002 Location: Charlotte, NC Posts: 1,014	If they the 1/2" Dtek GPU and NB blocks, this would work very well because they are essentially the same block and therefore would cause almost equal restriction. Water would be split fairly evenly between the two. It would be even better if you could keep their lines seperate until you got to a resevior or something, but it doesnt look like you have one in your system. Having them inline will create more restriction than keeping them seperate after the whitewater, thereby improving temps for the CPU. Also, the NB and GPU dont produce nearly as much heat as the CPU, so you should be alright in that category. I'd say go for it. __________________ I have a nice computer.

12-22-2003, 02:48 PM	#4
fhorst Cooling Savant Join Date: Oct 2003 Location: Almere, The Netherlands (Europe) Posts: 262	LOL All blocks are OK, just as long as they have "equal" restiction. You are planning to use them after the WW anyway, so the type of blocks does not matter that much in this case. Joining the outlets prior to the NB would gain a bit on the NB and GPU (1 degree e.g.) and you loose some on the WW. Leaving the WW split, would gain a bit on the WW, but you lose a bit on the NB/GPU.. (as the flow is devided in half) I'm not sure with keeping the 2 tubes till the res. 2 hoses have 2 times the wall surface, giving a but more restriction. But as it is spilt, the friction will be less. It just might be equal. __________________ If it get's hot, it needs to be watercooled!

12-23-2003, 03:05 AM	#6
fhorst Cooling Savant Join Date: Oct 2003 Location: Almere, The Netherlands (Europe) Posts: 262	LOL (again), when it comes to watercooling we are "all noobs". (Except a few specialists) But yeah, the key is to prevent to much "back pressure" and to divide the flow as equal as possible. But it still isn’t rocket science. Having a bit more flow at one side, doesn’t mean you’ll get real bad results. The biggest issue is still to prevent leaks and the use of elbows __________________ If it get's hot, it needs to be watercooled!

12-23-2003, 08:52 AM	#7
killernoodle Thermophile Join Date: Sep 2002 Location: Charlotte, NC Posts: 1,014	What kind of pump do you have. If you have a weak/low flow pump, it is likely you will have uneven flow. __________________ I have a nice computer.

12-22-2003, 01:55 AM	#3
psychofunk Cooling Savant Join Date: Jan 2003 Location: Los Angeles Posts: 365	I was actually thinking of going with the swiftech gpu and nb blocks as they seem to have no/little restiction. Are these a bad choice to go with for this setup?

12-22-2003, 11:57 PM	#5
psychofunk Cooling Savant Join Date: Jan 2003 Location: Los Angeles Posts: 365	Ahhh! I got it. The similar restriction refers to the gpu and nb only not incl the ww. The point being to not cause some sort of back flow or uneven flow out of the ww. Right? Any other ins and outs that a noob like me might subject to myself because of my ignorance???

12-23-2003, 11:39 AM	#8
fhorst Cooling Savant Join Date: Oct 2003 Location: Almere, The Netherlands (Europe) Posts: 262	?????????? :shrug: ?????????? Even with a 1 gph pump you won't get this... If the pump is real weak, and it won't give pressure inside the WW, you might get an uneven dividing of flow, but that is in that case a design/manufacturing mistake. If I'm correct (has been 20 years ago since I had this stuff) we are dealing with the law of Pascal. <<Pressure is the same in all directions.>> This also goes for the two outlets of the WW. Any difference in the pressure is a design mistake, letting the Jet pushing more water to one side. You will only see it more clearly with less waterflow __________________ If it get's hot, it needs to be watercooled!

12-23-2003, 06:41 PM	#10
fhorst Cooling Savant Join Date: Oct 2003 Location: Almere, The Netherlands (Europe) Posts: 262	Jep, we need Cathar! Not only will he be able to tell us if the "delayed" split ater the WW is a good setup (better then combining the spilt, and then let it flow through the NB and then GPU block), he could also tell is if the jet was designed for equal flow. (My best guess is that it is) __________________ If it get's hot, it needs to be watercooled!

12-23-2003, 07:02 PM	#11
Cathar Thermophile Join Date: Sep 2002 Location: Melbourne, Australia Posts: 2,538	Equal flow works best. Blocking off one outlet totally will reduce performance by around 1.5C or so, with the actual performance hit for splitting the flow unevenly being some middle point between 0-1.5C worse depending on how uneven it gets split.

12-23-2003, 07:44 PM	#12
fhorst Cooling Savant Join Date: Oct 2003 Location: Almere, The Netherlands (Europe) Posts: 262	Thank you for the reply! Just one question in mind. Having the split going through the other blocks first prior to joining them together, will give a bit less "backpressure" then placing them after each other. Will this improve the performence? __________________ If it get's hot, it needs to be watercooled!

12-24-2003, 12:35 AM	#14
fhorst Cooling Savant Join Date: Oct 2003 Location: Almere, The Netherlands (Europe) Posts: 262	OK thanks Cathar! __________________ If it get's hot, it needs to be watercooled!

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