![]() It does not.DDC has about 50% more head pressure than a D5 does. I don't know why you keep saying a D5 pump has more pressure than a DDC. The flow rating and pressure rating is with no restrictions, so the restriction in your radiators, fittings and blocks will lower your flow.ĭo you have many 90 degree fittings or quick disconnect fittings in your loop? If all that doesn't help: Get a proper flow meter (aquacomputer mps line) and take the readings.ĭdc pumps dosent offer as much head pressure as a D5 pump would, that's why D5 pumps are generally recomended for loops with multiple blocks and radiators. Have you tried your CPU before with an air cooler? (this might tell you whether your aftermarket IHS is off spec) Wouldn't be surprised if both Bykski and Barrow basically use/buy the same components and one of their suppliers has just made some mistake.ĭid you use the correct inlet port on the CPU block? (CPU blocks often have jet plates and those are sensitive to flow direction)ĭo you have a proper mount on the CPU? (all other temps are fine, just the CPU load temps are surprisingly high) Since this is one of a few threads regarding low flow rate with Bykski and Barrow components and their built-in sensors with displays, I assume the sensors to be just awfully bad or the software has some issues. I find it very unlikely that a realistic loop is so utterly restrictive that a DDC pump can't push >100lph or 1/2GPM. An EKWB DDC pump has a head pressure of 5.2m and a max flow of 1000lph. The EKWB SPC has a max pressure head of 2.2m and a max flow of 250lph. My little SPC pump has no issue with 2 radiators (HWLabs GTS - pretty restrictive in comparison) and 2 blocks. Then you would now if it's a flow or pressure problem with the pump. If I were you, I would try to RMA the pump, or at least test it without all the restriction, and see what flow it's producing. My experience is that the gap between a good ddc pump and a bad one is pretty big, where most D5 pumps are almost indentical. But I have seen plenty of ddc pumps not being able to handle two radiators and two blocks, where a single D5 would perform without breaking a sweat. I'm thinking of buying another DDC pump to add in series to the one I currently have and increase the to improve the head pressure, but I'm unsure if the pump I currently have is faulty or not based on the information I've provided. When running 100% and then 50% pump speed tests, the temperatures increase by around 5 degrees on the CPU. The Radiators do get warm to touch on load, and I have set up a fan curve based on the water temps, so I've ruled out any issues with the radiators as they seem to be doing a good job of keeping the water cool based on the above deltas. Here are the components used within the loop :īarrow DDC Pump (960L/H and 5.2m Head Pressure)Ģ x Radiators (1 x EK-XE360 and 1 x EK-PE60)Īs you can see from the image above, there are plenty of right-angled fittings (14 in total if you count the connections on the distro-plate) and I've tried to do a few bends myself to cut down on those right-angles, so I understand that there would be some restriction of flow, but would it explain the lowly 50-60LPH I'm currently experiencing in this setup when the pump is rated at 960L/H?įor reference, my temps at idle and load are as follows : I've observed the flow myself around the tubing and then dribbles into the reservoir, so I know the flow meter reading is relatively accurate. On a separate test, the GPU is topping 60 degrees during GPU-only 3D Mark stress tests, and from research, I should be getting anything from 48-55. ![]() Eventually it causes the system to freeze. The CPU is thermal throttling during OCCT SSE small size and Prime95 non-AVX stress tests with temps of between 90-100 on all cores. It's been overclocked to 5.1Ghz all cores and my Radeon 6800XT has been overclocked to 2.7Ghz at the moment. ![]() My i9-9900k CPU has been de-lidded and had liquid metal applied to the die, and a copper ISH installed. However, according to my digital flow meter, I'm having trouble with a low flow rate (around 50-60 LPH) at 100% pump speed, and believe it's causing some issues with abnormally high CPU and GPU temps.įrom doing a little digging around online, I should be looking for anything between 0.5-1GPM for maximum efficiency, and I'm a long way away from achieving that at the moment. I'm fairly new to water cooling, so decided to construct my own custom loop just over a month ago for my CPU and GPU. Apologies in advance for the lengthy post.
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