Pretty much. :) equivalent to the MCP350 in pressure, but with much better flow characteristics.Quote:
Originally Posted by zads
I like to see it more as a "MCP35X @ 50% PWM". :D
http://www.swiftech.com/images/MCP35B-vs-MCP35X-PQ.png
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Pretty much. :) equivalent to the MCP350 in pressure, but with much better flow characteristics.Quote:
Originally Posted by zads
I like to see it more as a "MCP35X @ 50% PWM". :D
http://www.swiftech.com/images/MCP35B-vs-MCP35X-PQ.png
This one is not PWM regulated. The MCP350 (or a 35X @ 50%!) is very, very quiet already. :DQuote:
Originally Posted by churchy
And we wouldn't be able to offer such a price if PWM was included ;)
stephen: I noted price regarding "MSRP of the MCP35X dropped to $99.9" :), though 35B being priced even lower then 350 even while having new top is wonderful aswell.
15$ imho is reasonable premium for PWM, even in cases if enhanced top is not used.
it's summer time, my mcp35x always run at 100% after turn on few minutes:shocked:
there seems a temperture sensor inside the pump, it will run at full speed if the pump internal temperature is over a predefined value. No response to the pwm control from the motherboard at this situation.
Anybody can help to confirm it?
This heatsink seems the only way to restore the PWM control feature:cool:
Sounds wierd. Somehow doubt it. I suspect rather it's not some sensor in pump, but rather higher ambient temps > higher resulting cpu temps > above set temp threshold for min rpms. I'm guessing you should be able to tune temp tresholds how pwm should act. Pump's heatsink in this case will do nothing to change that.
I used oscilloscope to check the PWM wire, it's 60% duty cycle but the pump run at full speed.Quote:
Originally Posted by churchy
When I use a fan to blow the pump for a few minutes, it reduced speed and under motherboard pwm control again.
hope there are mcp35x user can help to confirm
I can only confirm that when the PWM duty is at 60% the pump runs at full speed no matter the temperature. That's your issue. The PWM curve doesn't scale from 0-100% in a linear fashion.
That's what I got too, here is the PWM to RPM response that I got using a Gigabyte board and Easytune 6.
http://img337.imageshack.us/img337/1052/35xpwmvsrpm.png
35% is really about 1/2 power.
I guess it probably depends on the motherboard and software used too.
It also responds the same when hooked up to an Aquaero 5 (XT/PRO) using the PWM header which I have it running under currently.
When I performed the validation testing for the MCP35X-HS I've had a MCP35X run at >50 C (pump back panel) for several hours @ 100 % PWM. Data was logged for the whole duration of the test and it never throttled down.Quote:
Originally Posted by wizard1238
http://www.swiftech.com/images/Produ...5X-HS-Temp.png
Prior to that I did some validation testing at high coolant temperature (> 50 C) and it didn't throttle down either - the actual pump temperature (back panel) wasn't recorded but at this coolant temperature it was likely > 60 C.
I am thinking your CPU temperature might have been high enough to increase the PWM response. After all, easytune6, fan Xpert, etc are actual "temperature controller" reading CPU temps and increasing PWM accordingly. Maybe what you experienced was just that? If it's still happening right now, can you give me your easytune6, fanxpert, bios settings and and your current cpu temps?