EK PWM Pump?

[Real_PhillBert]

Hey guys, I have been kicking around adding a custom loop into my machine when I get a 980 in. I have been doing a fair amount of research about pumps and blocks but I have stumbled on a question that I am having trouble getting a strait answer on.

 

1) I understand that the flow rate of the water does not effect the temp of your components, so why would you want a PWM pump? I am pretty limited on space in my 350D so I am looking at these two pump/res combo's from EK.

 

PWM type:

http://www.frozencpu.com/products/21018/ex-pmp-247/EK_DDC_X-RES_Top_100_w_32_PWM_Pump_EK-DDC_32_PWM_X-RES_100.html?tl=g57c595s1938

 

Regular D5 Vario:

http://www.frozencpu.com/products/21022/ex-pmp-251/EK_D5_X-RES_Top_100_w_D5_Vario_Pump_EK-D5_Vario_X-RES_100_incl_pump.html?tl=g57c595s1938#blank

 

Right now I am leaning in the direction of the PWM pump purely because it is shorter.

 

2) I want to run a 280x30 alpha cool in the top and a 280x60 or 280x80 (if it will fit) in the front of my 350D. I would cool the 4790k @ 4.7Ghz 1.30v and a 980. I know we know nothing about the 980's right now but assuming its thermally identical to a 780 (which I really do believe it will be thermally superior) would I run into a cooling issue down the road if I wanted to add another 980?

 

I do not really need the performance but I really really love how multi-GPU machines look with liquid cooling.

 

Thanks in advance. 

[Benbinbeen]

If you are short on space the 3.2 PWM pump would be perfect and would work just fine. I have a MCP655-PWM pump in my personal computer which is a D5 pump but I don't even use the PWM control because it is dead silent on full blast and I didn't like the pump constantly speeding up and slowing down under PWM control. I had a EK 4.0 pump in an old system and it worked fine for me so I would imagine the 3.2 PWM pump and res combo would be just fine. I actually like the 3.2 PWM pump and res combo and I could see getting a bracket to mount it over a fan, if I had a radiator in the bottom of the case, and everything would look nice and tidy.

[Real_PhillBert]

If you are short on space the 3.2 PWM pump would be perfect and would work just fine. I have a MCP655-PWM pump in my personal computer which is a D5 pump but I don't even use the PWM control because it is dead silent on full blast and I didn't like the pump constantly speeding up and slowing down under PWM control. I had a EK 4.0 pump in an old system and it worked fine for me so I would imagine the 3.2 PWM pump and res combo would be just fine. I actually like the 3.2 PWM pump and res combo and I could see getting a bracket to mount it over a fan, if I had a radiator in the bottom of the case, and everything would look nice and tidy.

Thanks. I am just in the planning stage now, trying to get everything sorted out. Plus I have to get a 980 in there just to see how much space I have for the front rad. Unfortunately Bottom mount radiator would have to be pretty small, so front it is.

 

The only advantage I could think of for the PWM control was that you don't have to open up your system to adjust the pump speed. I would likely find a speed I am happy with and just set it at that speed. Like you I dont really care for the idea of the pump constantly changing speeds.

 

Thanks

[Shaqo_Wyn]

 

 

The D5 will run a cooler and quieter but both pumps are good and have plenty of pumping power for your needs.

 

With pumps PWM vs a physical know for rpm regulation is just a matter of how you want to control it. One could argue that you don't need PWM if you plan to leave it on one speed anyway. Especially if the PWM pump is more expensive. You can just buy the EK pump/res without the pump and chuck a Alphacool D5 Vario in it, set the dial once and presto. Up to you really.

[Real_PhillBert]

The D5 will run a cooler and quieter but both pumps are good and have plenty of pumping power for your needs.

 

With pumps PWM vs a physical know for rpm regulation is just a matter of how you want to control it. One could argue that you don't need PWM if you plan to leave it on one speed anyway. Especially if the PWM pump is more expensive. You can just buy the EK pump/res without the pump and chuck a Alphacool D5 Vario in it, set the dial once and presto. Up to you really.

 

That's also a good option.

 

The reason I am leaning to the PWM pump is not really for control but size. The PWM controlled pump/res is shorter and would probably package better in my fairly limited space. I will have to look into how tall a separate Pump and Res would be like you said.

 

Thanks

[Shaqo_Wyn]

That's also a good option.

 

The reason I am leaning to the PWM pump is not really for control but size. The PWM controlled pump/res is shorter and would probably package better in my fairly limited space. I will have to look into how tall a separate Pump and Res would be like you said.

 

Thanks

 

They look to be the same size to me..

 

http://www.frozencpu.com/products/17571/ex-pmp-215/EK_D5_X-RES_Top_100_-_Acetal_-_Laing_D5_Swiftech_MCP655-B655655-PWM.html

 

+ http://www.frozencpu.com/products/13147/ex-pmp-131/Alphacool_VPP655_Variable_Speed_Pump_w_RPM_Monitoring_-_Single_Edition_13122.html#blank

 

and it's $5 less.

 

http://www.frozencpu.com/products/21022/ex-pmp-251/EK_D5_X-RES_Top_100_w_D5_Vario_Pump_EK-D5_Vario_X-RES_100_incl_pump.html

[Real_PhillBert]

They look to be the same size to me..

 

http://www.frozencpu.com/products/17571/ex-pmp-215/EK_D5_X-RES_Top_100_-_Acetal_-_Laing_D5_Swiftech_MCP655-B655655-PWM.html

 

http://www.frozencpu.com/products/21022/ex-pmp-251/EK_D5_X-RES_Top_100_w_D5_Vario_Pump_EK-D5_Vario_X-RES_100_incl_pump.html

One of those is just the res and pump base and one is the combo. The D5 is taller.

 

PWM pump/res: 121mm tall

http://www.frozencpu.com/products/21018/ex-pmp-247/EK_DDC_X-RES_Top_100_w_32_PWM_Pump_EK-DDC_32_PWM_X-RES_100.html?tl=g57c595s1938

 

D5 Vario Pump/res: 153mm tall

http://www.frozencpu.com/products/21022/ex-pmp-251/EK_D5_X-RES_Top_100_w_D5_Vario_Pump_EK-D5_Vario_X-RES_100_incl_pump.html

[Shaqo_Wyn]

One of those is just the res and pump base and one is the combo. The D5 is taller.

 

PWM pump/res: 121mm tall

http://www.frozencpu.com/products/21018/ex-pmp-247/EK_DDC_X-RES_Top_100_w_32_PWM_Pump_EK-DDC_32_PWM_X-RES_100.html?tl=g57c595s1938

 

D5 Vario Pump/res: 153mm tall

http://www.frozencpu.com/products/21022/ex-pmp-251/EK_D5_X-RES_Top_100_w_D5_Vario_Pump_EK-D5_Vario_X-RES_100_incl_pump.html

 

Haha, now I see the confusion. You're referring to the 3.2 as the PWM pump. There are PWM D5's too bruh. Yes, the 3.2 pump/res config would be the smaller one. 

[Real_PhillBert]

Haha, now I see the confusion. You're referring to the 3.2 as the PWM pump. There are PWM D5's too bruh. Yes, the 3.2 pump/res config would be the smaller one. 

Yes... Because of the two listed in the OP one is PWM and one is D5. Lol.

 

But I did not know there was PWM controlled D5's. I know everyone suggests a D5 or bust. Should I be concerned about the 3.2?

[Shaqo_Wyn]

Yes... Because of the two listed in the OP one is PWM and one is D5. Lol.

 

But I did not know there was PWM controlled D5's. I know everyone suggests a D5 or bust. Should I be concerned about the 3.2?

 

Nah. It's a powerful little pump. It can push up to 1000L per hour, more than enough to give you max head pressure at 1GPM with 2 GPU's + 1 CPU and 2 rads and fittings + tubing.

[Real_PhillBert]

Nah. It's a powerful little pump. It can push up to 1000L per hour, more than enough to give you max head pressure at 1GPM with 2 GPU's + 1 CPU and 2 rads and fittings + tubing.

Cool. Thanks for the info!