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Corsair H45 pump voltage -- always 12v or constant voltage?

post #1 of 16
Thread Starter 
This is my doubt. I always heard that is best to leave at 12v, but is it because the voltage doesn't vary at full or because it has to be 12v (for 12v pumps)?

Or the issue is to maintain the pump always at a constant voltage and not vary? For example, my Corsair H45 at 3000rpm is silent, while at 4200rpm (12v) it is noisy as hell, and it seems that other people has the same problem.

I know that the rpm might not be correct, but could it run at a constant 3000rpm (whatever voltage that is) for life and don't wear out our fail or the ideal is to run always at max?

I am selling it, so I need to know if there is a workaround for the noise. If it 'has' to run at 12v I need to advise the buyer that he is buying a noisy product. I bought it just for test, then I was going to sell it anyway.

By the way, strong water cooler with a tight mounting system (which makes it perform way better than the H60 out of the box without washers on the backplate -- in my mobo). But the fan is also noisy -- the H60 also has a noisy fan.

I appreciate any inputs.
Cheers,
post #2 of 16
If you can hear the pump over the fans then either there's a trapped air bubble in the impeller or there's something wrong with the pump. I have the H45 here as well, and I did not notice any real change in pump noise at full speed vs slightly undervolted. They recommend sticking to 12V of course.
post #3 of 16
Thread Starter 
Quote:
Originally Posted by geggeg View Post

If you can hear the pump over the fans then either there's a trapped air bubble in the impeller or there's something wrong with the pump. I have the H45 here as well, and I did not notice any real change in pump noise at full speed vs slightly undervolted. They recommend sticking to 12V of course.

Yeah, I wrote to Corsair's support and they also said 12v. But it does not sound like bubble (gurgling) or clacking sounds that we see in internet videos of people with problems. It sounds just like engine noise. There is another guy with a H45 with a noisy pump. Corsair advised me to RMA the unit.

I can hear the pump across the room (seven, eight feet away). But at 3/4 speed it becomes inaudible.

Geez, it will be the second water cooler in a row from Corsair that I'll have to RMA. In fact the first two water coolers that I ever bought. I knew they were problematic (water coolers), but I would never imagine that much smile.gif
post #4 of 16
This is a new OEM they are using so it's a moot point to compare issues. But if you are having issues constantly, consider paying extra for higher performance, higher reliability coolers. The H45 is good bang for your buck though, so the other units will be a lot more expensive. Alternatively you can go air cooled if you are up for it.
post #5 of 16
Quote:
Originally Posted by geggeg View Post

This is a new OEM they are using so it's a moot point to compare issues. But if you are having issues constantly, consider paying extra for higher performance, higher reliability coolers. The H45 is good bang for your buck though, so the other units will be a lot more expensive. Alternatively you can go air cooled if you are up for it.

You mean get more bang for the buck? An better overall cooling with less noise and better reliability?????? But, there would be no tubes.....that's just crazy talk right there.....
post #6 of 16
Quote:
Originally Posted by ciarlatano View Post

You mean get more bang for the buck? An better overall cooling with less noise and better reliability?????? But, there would be no tubes.....that's just crazy talk right there.....

You haven't seen the H45, have you? Still not in retail channels in the US but $40ish and performs basically the same as the H75 with dual fans even which is $65-70 on a good day. Outperformed all my sub $40 air coolers here. Not Asetek, not CoolIT either.

I don't have many single tower air coolers here, the only one is the CM Hyper 612 v2 which is all noise optimized so I am sure there are some in the $40-60 range which will be better than the H45 but so far this is the best bang for buck CLC I have used.
post #7 of 16
Quote:
Originally Posted by geggeg View Post

You haven't seen the H45, have you? Still not in retail channels in the US but $40ish and performs basically the same as the H75 with dual fans even which is $65-70 on a good day. Outperformed all my sub $40 air coolers here. Not Asetek, not CoolIT either.

I don't have many single tower air coolers here, the only one is the CM Hyper 612 v2 which is all noise optimized so I am sure there are some in the $40-60 range which will be better than the H45 but so far this is the best bang for buck CLC I have used.
I'm siding with ciarlatano.
We need to get you a few good mid-range air coolers like True Spirit and Macho 140mm fan models with H5, Dark Rock Pro, Pure Rock, and a few others.
post #8 of 16
Quote:
Originally Posted by geggeg View Post

You haven't seen the H45, have you? Still not in retail channels in the US but $40ish and performs basically the same as the H75 with dual fans even which is $65-70 on a good day. Outperformed all my sub $40 air coolers here. Not Asetek, not CoolIT either.

I don't have many single tower air coolers here, the only one is the CM Hyper 612 v2 which is all noise optimized so I am sure there are some in the $40-60 range which will be better than the H45 but so far this is the best bang for buck CLC I have used.

I wouldn't say performing like an H75 is particularly complimentary. As doyll said, you need some good budget and mainstream coolers.
post #9 of 16
Quote:
Originally Posted by ciarlatano View Post

I wouldn't say performing like an H75 is particularly complimentary. As doyll said, you need some good budget and mainstream coolers.

Well it was more relative to other CLCs than anything else biggrin.gif

I'll try to get some other air coolers on board.
post #10 of 16
Thread Starter 
I am testing six coolers / air coolers and the difference in between the H60 and the H45 (there is a review saying the H45 gets close to the H80) is the mounting system. The H45 has a very tight fit in my mobo, while the H60 is not properly mounted. The thermal paste does not spread all through. And looks like the H60 has this lackluster performance in reviews exactly because of that. The H80 and other models seem to suffer from the same problem in some motherboards (thickness I imagine). The best mount I did in the H60 made it draw with a Raijintek Evo (good entry cooler). Then I used washers and it did draw with my NH-U14S in average temps. The mount might have been tighter with another washer, but I did not want to risk my CPU / socket. But the H45 was ahead of the pack (NH-U14S included) most of the time.

Remember that I tested with an i7-3770K, a 77W CPU. The tests were made at stock, 4.2 / 4.4 and 4.6GHz overclocks. The NH-U14S had a curve indicating it would open from the pack with a 130W CPU for example, but nonetheless it got me surprised. In fact I went back to use my old Zalman 9900 NT, not that far behind. I bought the Zlaman a few years back and then replaced it by the NH-U14S. The Zalman mounting system is very complicated (one of the fixing screws is hidden below the radiator and you have to screw it in a very awkward angle) and it was not performing accordingly. The cap tends to overlap the berth in every mounting attempt and you don't even see it. After a few trials I got a good mount (now I know what to look for) and it gets very close to the NH-U14S as well.

So, back to the entry level water coolers like H60, I think most of the time they have lackluster performances because of the mount. I bought the H45 just because of the review, saying it got close to the H80 and all, this and that, and from my tests it performs the same as the H60 with washers. It has nothing to do with the new pump or design (the pump is located next to the radiator).

With a good fan (the OEM is subpar in quality and noise) and washers (in my mobo) the H60 is a very good water cooler.
Edited by Contiusa - 8/13/16 at 6:13pm
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