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Then it is the Asetek unit (rounded coldplate) and should run at 3000rpm at all times unless the unit has Corsair Link, but the pump heather should be always at 12V. You just adjust the speed with the firmware (Corsair Link). If there is no Corsair Link, run it always at 12V. As I said, some motherboards will read the pump pulse wrong and indicate 1500rpm. You can check the Asetek site, where it states the pump at 3000rpm and they list their clients, such as Corsair, EVGA, Thermaltake, etc. And the Asetek pump is pretty silent. You can hear just a low hum if you get your ear to the side panel of the case, so it is inaudible seating a few palms away. But make sure it is the pump, because it can be other harware making the noise, or even the fan, air bubbles in the loop, etc.

What exact model do you have? For example, the H100i Pro RGB is CW-9060033-WW. Corsair has three OEMs for the AIOs if I'm not mistaken. Asetek, CoolIT and the one for the H45, each with a different pump and rpm.

Your unit might be Asetek, so you should not hear any buzz at 1500rpm. In fact the pump runs at 3000rpm, just that some motherboards / apps read the pump pulse wrong and show 1500rpm. If the buzz is getting over the case noise and is strong, you should contact the support. They are not supposed to be noisy. I had two Asetek pumps (H55 / H75) and you could only hear a slow buzz getting really close to the case, and my case sits just by my side and I could not hear anything. My rig was pretty silent with a Noctua cooler (U14S) and low rpm case fans. Both pumps running at 12V 1500rpm (3000rpm). I would also not run the pump below the max speed. There is a post from a Corsair engineer here saying that the pump should be always receiving 12V from the header. If your unit has a firmware that adjusts the speed (quiet/performance, etc), fine, you can run it slow, but it is the app doing the work and it is still receiving 12V from the header. He said that if you have a unit with no speed control and you lower the speed through the header, changing the voltage on your motherboard, you could have voltage oscillations that will break your pump overtime, depending on the voltage quality, pretty quickly. So, in these units with no speed control, you should run always at max speed (12V) to avoid problems down the road.

I'll try to open a ticket just as a curiosity, but the cable I ordered is exactly the same as the original (same flat black cable, same connectors). It is not a custom / braided cable, so I tend to think it is the same OEM that Corsair and other brands uses. Of course I’ll compare both cables when it arrives. Let’s see.

The problem is, I only found the cable in local US stores. Not even on Amazon. The cable that I bought was also available on e-Bay. The same vendor has cables for the RMX series (or some other model). Do you know any vendor who ships it to Brazil? Corsair's site was asking me an US and Canada address only IIRC. I incur in the risk, but after buying products from Aliexpress for years, what I see is that many of them are just OEMs from known brands (nowadays almost everything comes from China, Taiwan and such). I just bought a rad that seems to be the OEM of EK (double fins, which is not common). In fact I like Aliexpress more than e-Bay - way better tracking system / paying system. I could try and contact Corsair Brazil, but I have a sense they won't order the cable and sell it to me. Am I right? Or it is common for local Corsair support to order and sell these things?

Cool, thanks, I found the cable at Aliexpress (for the RM series) and ordered it. I still have one PCIe / CPU connection left to use. Regards,

Hi guys, my motherboard has a 12 pin CPU power connector (Z390 UD). I will overclock my i5-9600K to near 5Ghz (custom loop). But my PSU (RM750) has only an 8 pin connector. Does Corsair offer any kind of extension (I saw some individual connectors for sale) or do I need a new PSU? From what I saw, Corsair does not have any 650/750W PSU with 12 pin CPU connectors (which is strange, since nowadays 750W is almost overkill for a regular gaming rig). I won’t buy a 850W plus PSU because my consumption will never reach the point to spin the fan and the PSU heats up my case, as it does now with the RM750, that won’t get to the point of spinning the fan but gets fairly hot inside the case - never really understood the quiet fan feature if it means heat up the case. So I rather be with a 750W PSU (I just have one GPU and it is unlikely for me to have a Titan or any sort of similar card). I've seen posts about the EVGA units, but I rather stick with Corsair or Seasonic (I know that Corsair has several Seasonic units as OEM). I appreciate any feedback.

Yeah, thanks, I'll do it.

The title is self explanatory. This video below is abnormal, right? I just got this unit. Did not install it yet. From my feeling of the weight of the thud and the sound, I imagine less than 50% filled, but I could be wrong / only opening it to really know for sure (of course I am not going to do that). [ame] [/ame] I assume that something went wrong when the unit was filled. I saw some liquid on the hose / connections and in a rad groove as well. I thought it could be condensation (room ambient, so I don't think this is possible) and the unit now has oil marks that I can wipe off, but unexpected. *Edit: I left the unit working outside the case overnight and there are no spills, but I am wary of it. I am not comfortable with this unit at all. What do you guys think?

I wrote to Corsair support and they only advise 12v for the pump to avoid wear and tear. He said that if the noise is that bad they can only suggest a replacement. I would RMA the unit. By the way I tested my pump at 3/4 speed and indeed the noise is gone. In average the increased temperature is of only 1ºC. I also tested with a quieter fan, in this case an XtraFlo120 or even a Boreas 120 and the loss was also of only 1ºC. Maybe an SP120 HP will keep the temperatures and it is way quieter.

The suggestion was to reduce the fan rotation changing the PWM profile from normal to silent, not the pump. From what people say, to run the pump at lower speeds can cause wear and failures down the line. But I agree that the pump noise of the H45 is unbearable. I am just not sure if it is a good idea to leave it below 12v. On this regard you are in between the rock and the hard place...

I am testing both the H60 and the H45 and the H45 pump indeed has this high pitch noise, which is audible in idle. Then I tested both outside the case, only with the pump connected to the motherboard (both at 12v) and the H45 still makes this high pitch noise. Does not sound like a defective unit or coil whine. It sounds like regular pump noise. The problem is - the H60 pump is basically dead silent -- you need to get really close to hear anything. One advice -- you can set the PWM to "silent" for the H45 fan. I have been doing tests and you are going to lose +- 1ºC, but the noise is significantly reduced. But the pump noise will continue in the background. Maybe there is a turnaround for this, but my wild guess is that the pump is actually noisy. This unit was made to be affordable -- and the price is indeed way lower than the H60.