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Cpu Block+VRM block Vs Monoblock

post #1 of 22
Thread Starter 
Hi there,
my motherboard is dying and i'm looking for a new one, I was wondering, since I need to change my cpu waterblock aswell (due to lack of support for the lga 1151), will a monoblock have better flowrate and an overall better thermal dissipation than a standard cpu block+vrm block?

thanks biggrin.gif
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post #2 of 22
Hi there,

Interesting, well to be honest I do think is almost the same thing tongue.gif, well the cold water will cool your CPU and the water will spread to the VRM's this is using the monoblock of course.

Now for the normal CPU+VRM, the cold water will cool the CPU 1st and then the VRM's, sounds like it's a bad thing, but you have to keep in mind that after a few minutes your cooling system will hit the maximum temperature that's able to cool let's call it delta. (this is depending on how many radiators you have tongue.gif) so after a while your water will have a stable temperature and still keep cooling your system, no matter what.

I think is more of aesthetics here, maybe someone have more input on this biggrin.gif

Cheers rolleyes.gif
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post #3 of 22
Quote:
Originally Posted by josepi View Post

Hi there,

Interesting, well to be honest I do think is almost the same thing tongue.gif, well the cold water will cool your CPU and the water will spread to the VRM's this is using the monoblock of course.

Now for the normal CPU+VRM, the cold water will cool the CPU 1st and then the VRM's, sounds like it's a bad thing, but you have to keep in mind that after a few minutes your cooling system will hit the maximum temperature that's able to cool let's call it delta. (this is depending on how many radiators you have tongue.gif) so after a while your water will have a stable temperature and still keep cooling your system, no matter what.

I think is more of aesthetics here, maybe someone have more input on this biggrin.gif

Cheers rolleyes.gif

I wouldn't confuse him by using delta wrong.

If you've ever taken calculus you should remember, delta is a change or difference of two similar (well usually two points along the same function) data points in this case it is a temperature delta so the difference in temperature between two different places either air/water delta (the most common when using the word delta) or inlet/outlet temperature delta.

What he is talking about is thermal equilibrium, where the thermal input into the cooling system is equal to the thermal dissipation capacity of the radiator and fans which every cooling system has.

Honestly the separate blocks might perform marginally better (probably as little as a few fractions of a degree if any at all), so going with the easier option of the monoblock if you don't plan on upgrading your motherboard for a few years. Mostly because mono blocks aren't usually reuseable like a universal cup block.
Edited by somebadlemonade - 1/31/16 at 2:08am
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post #4 of 22
Thank you for telling me that tongue.gif

I took calculus a longg time ago hahaha, but still we reached the same conclusion. thumb.gif

And that's a good point, the monoblocks are not really reusable like a universal CPU block.
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post #5 of 22
Thread Starter 
thanks for the answers guys,
well I should say that I did a "classical" highschool where I did 2 hours of math a week and like 8 hours of latin, old greek, italian grammar, german and english literature etc...and @ university I did ancient roman history, so my math is basically the math of a 12year old kid...fortunally my gf does math at university so when I struggle I usually have her to explain things to me XD

Aw I think I know what delta is, what I was asking is exactly that, will a monoblock have a better delta than a cpu block, since it should have bigger canals than a standard monoblock and has a larger surface?
I'm asking this because with my cpu waterblock I have a delta of more than 10 degrees in idle, with the vgablock I have the card at 41-45 degrees in full load heavily when the water temp is at 31 and 35 degrees, basically a delta 10 in load and 0 in idle (where the delta here is the difference between the water and the chips).
This temps or delta are doubled with the raystorm block, with a 1.450v OC @4800mhz, I have like a delta 12/15 in idle and a delta of 20/25 respectively in game and in full load. What I would like to know if there is a better cooling option for the cpu, since if I'm not lucky I would need to push voltages and tbh I would like to keep the i7 6700k@4.8/5.0 ghz for gaming and benchmarking.

with your answers I got that they are basically the same but the monoblock is not reusable, which is a bit disappointing, I really hoped to lower the delta in the cpu and have more room for OC.

Well about the "re-usability" I don't really care, I mean I already got a cpu block (xspc raystorm) that I cannot use because it does not have a 1151 backplate.
Considering that I kept for 4ys my mobo I would like to do the same with a newer one tongue.gif.
Edited by Prometheus6987 - 1/31/16 at 2:53am
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post #6 of 22
Like said above: It will be better to separate them.
Monoblock: The hotter source will heat up the cooler heating source, like you would add another block i.e. to the northbridge like you would overclock your CPU even higher: your water will get hotter and your parts will raise degrees. With copper connection (not water), this will be more intensified.
But your flow rate will be higher because of less angles and shorter way to flow smile.gif

edited
Edited by IrvineG - 1/31/16 at 3:19am
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post #7 of 22
Thread Starter 
Quote:
Originally Posted by IrvineG View Post

Like said above: It will be better to separate them.
Monoblock: The hotter source will heat up the cooler heating source, like you would add another block i.e. to the northbridge: your water will get hotter and your parts will raise degrees. With copper connection (not water), this will be more intensified.
But your flow rate will be higher smile.gif

So if the the flow rate will be higher this will compensate the copper connection and that's is why the temps will be about the same?
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post #8 of 22
Flow rate is minor to thermal conductance of copper, that would not compensate^^
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post #9 of 22
Pretty much any flow rate over 1.5GPM doesn't have a massive effect on temperatures once the loop reaches equilibrium, well not as much effect as adding another radiator does.

All closed cooling systems are limited this way, if you had an absolutely massive reservoir higher flow rates would come into play, but with standard off the shelf parts it's not really going to change much past a few fractions of a degree here or there.

Honestly, books and books could be written about water cooling and the thermodynamic of it, and still not cover everything, to try and condense the absolute the pros and cons of each is a foolhardy endeavor, worst case scenario, your cpu is 3 degrees hotter than with the other option or has 0.2GPM less flow per minute.
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post #10 of 22
Go monoblock due to flow rate. As for thermals, monoblock should cool a tad bit better than separate vrm + cpu block due to higher amount of copper to dissipate heat from the source.
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