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mcp355 w/ top vs mcp35x - Page 3

post #21 of 27
Quote:
Originally Posted by AliceInChains;13521836 
Yea they do make things easier in tight spaces. But if I can get by without I'd rather just use barbs. Now a smaller case might have forced me to use rotaries.

I'm still fairly new to water cooling so I guess I feel more secure with barbs and clamps

Everything leaks, given the right circumstances or mistakes. wink.gif
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post #22 of 27
Quote:
Originally Posted by AliceInChains;13520579 
xspc rasa block, 2x ek 570/580 full cover blocks, 1x rx360 rad, 1x 120 rad(dont remember the model)

The 355 will handle that no problem..

I'm with you in avoiding elbows and rotaries and even avoid compression fittings if possible. A simple barb and clamp gets my vote. I've only had one build where I needed a pair of elbows in which I used brass Qpex household 3/4" elbows. Not as purdy as your watercooling rotary, but less restriction and no rotary to worry about.smile.gif
    
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post #23 of 27
i don't want to hijack, but just a quick question if i may: why are people recommending the D5 to him over other pumps?

i ask because i'm also doing a build soon (my first) and the 35x was the pump recommended to me due to its superior performance.

i'll be running 1 CPU XSPC Rasa and 1 GPU Koolance 580 blocks, and 1 XSPC RX240 rad.

i look for a balance between good temps and noise. PWM control preferred.

thanks!
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post #24 of 27
Thread Starter 
Quote:
Originally Posted by nicodemus;13523275 
i don't want to hijack, but just a quick question if i may: why are people recommending the D5 to him over other pumps?

i ask because i'm also doing a build soon (my first) and the 35x was the pump recommended to me due to its superior performance.

i'll be running 1 CPU XSPC Rasa and 1 GPU Koolance 580 blocks, and 1 XSPC RX240 rad.

i look for a balance between good temps and noise. PWM control preferred.

thanks!

I think the d5 is rated at 50 psi while the 35x is 22 psi. What I dont understand is how the d5 has more pressure, but the 35x has more head. Like 14.something ft head.
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post #25 of 27
Quote:
Originally Posted by nicodemus;13523275 
i don't want to hijack, but just a quick question if i may: why are people recommending the D5 to him over other pumps?

i ask because i'm also doing a build soon (my first) and the 35x was the pump recommended to me due to its superior performance.

i'll be running 1 CPU XSPC Rasa and 1 GPU Koolance 580 blocks, and 1 XSPC RX240 rad.

i look for a balance between good temps and noise. PWM control preferred.

thanks!

Probably based on personal preference, but not on performance. Look here at testing, scroll down on both loops tested (both charts) and highest performing ddc3.2 pump/aftermarket top was about 0.1 GPM higher than best D5 aftermarket top in both cpu only loop and sli loop. And since chart is old, maybe aftermarket top on a D5 is little better now by 0.1GPM. Regardless, 0.1 GPM wont mean anything for temps, ie in reality they perform the same. And even though one may perform slightly better in flow (completely unnoticeable in temps) in one scenario vs another, bottom line its personal preference and splitting hairs.

Prior to 35x, D5 had speed control, ie noise control over it, but now not even that.
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post #26 of 27
Quote:
Originally Posted by opt33;13525769 
Probably based on personal preference, but not on performance. Look here at testing, scroll down on both loops tested (both charts) and highest performing ddc3.2 pump/aftermarket top was about 0.1 GPM higher than best D5 aftermarket top in both cpu only loop and sli loop. And since chart is old, maybe aftermarket top on a D5 is little better now by 0.1GPM. Regardless, 0.1 GPM wont mean anything for temps, ie in reality they perform the same. And even though one may perform slightly better in flow (completely unnoticeable in temps) in one scenario vs another, bottom line its personal preference and splitting hairs.

Prior to 35x, D5 had speed control, ie noise control over it, but now not even that.


sounds great! thanks for the useful info! i think i'll stick with the 35x then. =)
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post #27 of 27
Quote:
Originally Posted by nicodemus;13523275 
why are people recommending the D5 to him over other pumps?

The DDC series with aftermarket top is superior in performance hydraulically (more pressure per flow rate in the applicable ranges). The DDC series also consumes less heat and dumps less heat into the loop (More efficient). The DDC series also has a smaller footprint. The 35X is basically a DDC with PWM control + Top + RPM tweaks....it's sort of the DDC we have been all making with aftermarket tops but also adding PWM and a touch more power.

The D5 series comes with 1/2" barbs and a good performing stock top, so modifying it is much more for show than go. The D5 series is also generally a bit quieter at full speeds with a top, a bit more reliable, has less heat buildup (Metal pump casing transfers heat better), and if selecting the vario comes with a cheap/easy means to vary speeds. The D5 series also comes with a lifted stand, so placing it on decoupling materials doesn't cause any heat build up issues.

They each have some pros and cons. I like the 35X because of the PWM function and raw power it provides right out of the box. When you set up PWM control to reduce speeds during low loads, you eliminate the heat buildup issues and you really improve noise.

They are all good pumps, but I would suggest the 35X if you plan to utilize PWM automatic speed controls. There is really no reason to run a pump at 100% when browsing the web and doing office tasks. It's a waste of silence, waste of energy, and unnecessary heat/wear on the motor.

If you don't need that much power, and want reduced costs...there will also be a 35B coming out soon that is basicaly an MCP350 with 35X top.
Edited by Martinm210 - 5/16/11 at 3:45pm
    
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