Is it PWM version or Speed Control?
D5 pumps are from my perspective better choice.
Generally is less louder. But D5 and DDC are changed and have many variations, special DDC pump.
Looks like some D5 Pumps have some kind of changes on impeller and that cause to impeller need more space and cause noise.
Stay with older models...
These pumps have impeller like Original laing before 2009.https://www.dazmode.com/store/shop/watercooling/pumps/pump-motors/d5-vario-8-24v-pump-wtach-cable-option-mcp655-and-etc/
Look customer experience on old Swiftech MCP655, 5 stars on Newegg... that can't be reach with any new PWM model from any brand I believe.
If seller still have exactly same, not to send you PWM version.https://www.newegg.com/Product/Product.aspx?Item=N82E16835108082
That was classic experimenting on good reliable and proven product to improve his performance and to say My version is even better, than advertise agressively and give 10% more flow...
Without worry what will happen if that cause more noise or problems because anyway enthusiasts will buy another one if don't like.
Every time when someone tried to improve German product that didn't finished good.
On first look PWM version could look as better choice, but actually that's must worse choice, because then you met with buggy softwares from manufacturers and you don't have 5 softwares to control PWM pump, you need to use software from motherboard. With ASUS that's famous well known buggy AI Suit. If not you stuck with BIOS.
If D5 not help you on 3 speed he will not decrease temps even on 5. Speed 5 need only if you use two graphic cards and CPU and VRM cooler because flow.
Than everyone anyway use two pumps on speed 2. And they will not spin max when you restart computer, you will not need softwares, you will not need to enter in BIOS to change settings.
I change everything inside BIOS. I didn't change speed from 50% at all, that's 2400-2500 RPM. I believe she need to work little faster when I add GPU, that's exactly speed 3 on non PWM version, 3300 RPM is speed 3. And you don't need to change that and after all PWM become inferior to old one. I don't know single software to change D5 PWM except AI Suit on ROG Motherboard.
Or you can spend 50-100$ more to add controllers etc but that's complication and not necessary at all.
I installed once AI Suit and after week my thought was, why people complain on this software, everything is fine.
Than one day no icons empty task bar, tomorrow I go to check CPU temps, CPU Temp 0. ****... Intel Diagnostic Fail because temp 0.
I start to look price of second hand Haswell-E, i7-5930K or similar... then I remember people talk AI Suit is in conflict with HWInfo, AIDA64, etc...
Nothing help...everything I tried or read force me to think that sensor in CPU died.
After I reinstall Windows when I saw normal CPU Temp I was so happy... never again installed AI Suit, control PWM in BIOS and never again PWM profile of pump.
Everyone should have two pumps in house, like two PSU, because if you don't have you will start PC when new one arrive.
I don't afraid of damage because BIOS will disable CPU on 80C and that's it but two pumps are necessary and I will keep in box PWM version.
post edited by Vlada011 - 2019/05/14 19:18:47