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Best speed for MCP655

post #1 of 8
Thread Starter 
I have a swiftech water cooling system:
apogee water block
apogee northbridge block
120 mm radiator
mcp655 pump

the air on the radiator is at maximun
the pump is currently set at 5-fastest speed
i was thinking maybe it should have a lower flow rate to increase the
thersmal exchange (the water stays more time in the radiator)
anyone has any suggestions or experience with this.
My System
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e6600 @ 2.4 ghz eVGA 650i Ultra XFX 8800GTX PNY PC6400 2GB 
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My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
e6600 @ 2.4 ghz eVGA 650i Ultra XFX 8800GTX PNY PC6400 2GB 
Hard DriveOptical DriveOSMonitor
WD 150 GB RAPTOR and WD160GB slave NEC 18x DVD-/+RW Windows XP/Windows Vista on diff partitions Viewsonic 22" and LG 17" LCDs 
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Logitech G15 silverstone Strider 1000 watts Cooler Master Mystique Aluminum Logitech G5 
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post #2 of 8
Considering your components, there’s probably nothing you can do to flow rate to improve your CPU temp.

When you decrease the flow rate water certainly does take longer to travel through the radiator. However, the radiator isn’t the only part of your system. You have two waterblocks, and the water is taking longer to go through them as well. That means the water is getting hotter. The end result is that you’re pretty much transferring the same amount of energy regardless.

But when the temperature difference between water in and water out of the block increases, then the average temperature of the block increases. When that happens, the CPU temperature goes up. That’s why you don’t want really slow flow.

Fast flow, however, is a function with diminishing returns. Every time you double the flow, the in-out temperature difference cuts in half. But if your in-out temperature difference is already only, say, 0.2C then doubling flow can only get you a 0.1C improvement.

That’s why I say that you want your flow to be between 1 and 2 GPM. At that flow rate the in-out temperature difference is only about 0.3C. Moving the water faster just wastes energy without any measurable improvement.

I always recommend trying the slower settings to see how it affects temperature. Most likely you can go down to 3 and not notice an increase in temperature. But at 3, you use less power and generate less noise, and that’s always a good thing.
post #3 of 8
Thread Starter 
thanks.
as it is right now (fastest speed) the temp idles at 37 and at load 56 C.
I have not over clocked the cpu so i dont know why t would be so high at load. Ill give it a cople of days to see if the hardening artic cool 5 thermal paste makes a difference.
well thanks for the replay.
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
e6600 @ 2.4 ghz eVGA 650i Ultra XFX 8800GTX PNY PC6400 2GB 
Hard DriveOptical DriveOSMonitor
WD 150 GB RAPTOR and WD160GB slave NEC 18x DVD-/+RW Windows XP/Windows Vista on diff partitions Viewsonic 22" and LG 17" LCDs 
KeyboardPowerCaseMouse
Logitech G15 silverstone Strider 1000 watts Cooler Master Mystique Aluminum Logitech G5 
  hide details  
Reply
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
e6600 @ 2.4 ghz eVGA 650i Ultra XFX 8800GTX PNY PC6400 2GB 
Hard DriveOptical DriveOSMonitor
WD 150 GB RAPTOR and WD160GB slave NEC 18x DVD-/+RW Windows XP/Windows Vista on diff partitions Viewsonic 22" and LG 17" LCDs 
KeyboardPowerCaseMouse
Logitech G15 silverstone Strider 1000 watts Cooler Master Mystique Aluminum Logitech G5 
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post #4 of 8
The Apogee is setup for high-flow. Leave it at 5 and call it good. Get bigger and better Fans or a new rad or a stinger If you would like to see a difference.
    
CPUMotherboardGraphicsRAM
i7-3770k Asus Maximus IV Extreme-Z ASUS GTX 770 2x4GB Gskill Ripjaws 
Hard DriveHard DriveOptical DriveCooling
Samsung EVO 840 WD Caviar Green Sony AD-7260S-0B DVD Burner Scythe Mugen 2 Rev. B 
OSMonitorKeyboardPower
Windows 8.1 Pro x64 QNIX QX 2710 Filco Majestouch-2 Rosewill Capstone-750-M R 
CaseMouseMouse PadAudio
Zalman Z-Machine GT1000 Logitech MX518 Black Banshee Pad Krator N2-20020 (Garbage) 
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CPUMotherboardGraphicsRAM
i7-3770k Asus Maximus IV Extreme-Z ASUS GTX 770 2x4GB Gskill Ripjaws 
Hard DriveHard DriveOptical DriveCooling
Samsung EVO 840 WD Caviar Green Sony AD-7260S-0B DVD Burner Scythe Mugen 2 Rev. B 
OSMonitorKeyboardPower
Windows 8.1 Pro x64 QNIX QX 2710 Filco Majestouch-2 Rosewill Capstone-750-M R 
CaseMouseMouse PadAudio
Zalman Z-Machine GT1000 Logitech MX518 Black Banshee Pad Krator N2-20020 (Garbage) 
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post #5 of 8
I say experiment! See what provides the best combination of noise, flow and performance. The MCP655 DOES make a high-pitched noise at full tilt, I can hear it, but then again, I've got a near-silent system
Burning Phoenix
(13 items)
 
  
CPUMotherboardGraphicsRAM
Intel Q9550 Gigabyte EP45-UD3P eVGA GTX 260 Core 216 SuperClocked 4GB G.Skill DDR2-1000 5-5-5-15 
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3 WD 80GB RAID0, Seagate 500GB, WD 1TB Caviar BLCK Lite-On LH-20A1S Windoze 7 Professional Dual Dell E207WFP 20.1" Widescreen LCD's 
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Burning Phoenix
(13 items)
 
  
CPUMotherboardGraphicsRAM
Intel Q9550 Gigabyte EP45-UD3P eVGA GTX 260 Core 216 SuperClocked 4GB G.Skill DDR2-1000 5-5-5-15 
Hard DriveOptical DriveOSMonitor
3 WD 80GB RAID0, Seagate 500GB, WD 1TB Caviar BLCK Lite-On LH-20A1S Windoze 7 Professional Dual Dell E207WFP 20.1" Widescreen LCD's 
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post #6 of 8
Quote:
Originally Posted by Burn View Post
I say experiment! See what provides the best combination of noise, flow and performance. The MCP655 DOES make a high-pitched noise at full tilt, I can hear it, but then again, I've got a near-silent system
You could hear a fly cough at 500 yards
    
CPUMotherboardGraphicsRAM
i7-3770k Asus Maximus IV Extreme-Z ASUS GTX 770 2x4GB Gskill Ripjaws 
Hard DriveHard DriveOptical DriveCooling
Samsung EVO 840 WD Caviar Green Sony AD-7260S-0B DVD Burner Scythe Mugen 2 Rev. B 
OSMonitorKeyboardPower
Windows 8.1 Pro x64 QNIX QX 2710 Filco Majestouch-2 Rosewill Capstone-750-M R 
CaseMouseMouse PadAudio
Zalman Z-Machine GT1000 Logitech MX518 Black Banshee Pad Krator N2-20020 (Garbage) 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
i7-3770k Asus Maximus IV Extreme-Z ASUS GTX 770 2x4GB Gskill Ripjaws 
Hard DriveHard DriveOptical DriveCooling
Samsung EVO 840 WD Caviar Green Sony AD-7260S-0B DVD Burner Scythe Mugen 2 Rev. B 
OSMonitorKeyboardPower
Windows 8.1 Pro x64 QNIX QX 2710 Filco Majestouch-2 Rosewill Capstone-750-M R 
CaseMouseMouse PadAudio
Zalman Z-Machine GT1000 Logitech MX518 Black Banshee Pad Krator N2-20020 (Garbage) 
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Reply
post #7 of 8
I am only hoping to make it quieter, too, with the addition of a triple rad to replace the 2 heatercores, and reusing the 120mm Enermax silent fans....Pump probably will get turned down, and then I'll have a silent system
Burning Phoenix
(13 items)
 
  
CPUMotherboardGraphicsRAM
Intel Q9550 Gigabyte EP45-UD3P eVGA GTX 260 Core 216 SuperClocked 4GB G.Skill DDR2-1000 5-5-5-15 
Hard DriveOptical DriveOSMonitor
3 WD 80GB RAID0, Seagate 500GB, WD 1TB Caviar BLCK Lite-On LH-20A1S Windoze 7 Professional Dual Dell E207WFP 20.1" Widescreen LCD's 
KeyboardPowerCaseMouse
Logitech G15 Silverstone OP750 Lian-Li PC-A10B Logitech G5 
Mouse Pad
Harley Davidson 
  hide details  
Reply
Burning Phoenix
(13 items)
 
  
CPUMotherboardGraphicsRAM
Intel Q9550 Gigabyte EP45-UD3P eVGA GTX 260 Core 216 SuperClocked 4GB G.Skill DDR2-1000 5-5-5-15 
Hard DriveOptical DriveOSMonitor
3 WD 80GB RAID0, Seagate 500GB, WD 1TB Caviar BLCK Lite-On LH-20A1S Windoze 7 Professional Dual Dell E207WFP 20.1" Widescreen LCD's 
KeyboardPowerCaseMouse
Logitech G15 Silverstone OP750 Lian-Li PC-A10B Logitech G5 
Mouse Pad
Harley Davidson 
  hide details  
Reply
post #8 of 8
Thread Starter 
i wana replace my radiator too, what u guys recommend in the `240mm range, and how do i go about replaceng it without making a mess.
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
e6600 @ 2.4 ghz eVGA 650i Ultra XFX 8800GTX PNY PC6400 2GB 
Hard DriveOptical DriveOSMonitor
WD 150 GB RAPTOR and WD160GB slave NEC 18x DVD-/+RW Windows XP/Windows Vista on diff partitions Viewsonic 22" and LG 17" LCDs 
KeyboardPowerCaseMouse
Logitech G15 silverstone Strider 1000 watts Cooler Master Mystique Aluminum Logitech G5 
  hide details  
Reply
My System
(13 items)
 
  
CPUMotherboardGraphicsRAM
e6600 @ 2.4 ghz eVGA 650i Ultra XFX 8800GTX PNY PC6400 2GB 
Hard DriveOptical DriveOSMonitor
WD 150 GB RAPTOR and WD160GB slave NEC 18x DVD-/+RW Windows XP/Windows Vista on diff partitions Viewsonic 22" and LG 17" LCDs 
KeyboardPowerCaseMouse
Logitech G15 silverstone Strider 1000 watts Cooler Master Mystique Aluminum Logitech G5 
  hide details  
Reply
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