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Can't get cpu fan to run at full speed?

post #1 of 10
Thread Starter 
Hi overclockers!
I'm overclocking my cpu but my cpu cooler is not helping me at all. I put it on "Full on" in bios setting but the speed only hoovers around 2000rpm. The fan can go up to 2500 rpm. How do I get it to go max speed?
Alpha dawg
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Alpha dawg
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post #2 of 10
Two options....

1. You probably have it connected to a 4-pin (or PWM) fan header. Connect it to a 3pin header on your mobo.

2. Get a fan controller and hook it up to that. I recommend the lamptron fc-6 or the zalman zm-mfc1 plus depending on the classiness vs. flashiness of your build.

EDIT: also remember the purpose of PWM fans is to run at a speed that matches your cpu temp. If your CPU isn't overheating, it won't run at 100%. This is to maximize performance and minimize sound.
Kilgore Trout
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Kilgore Trout
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post #3 of 10
Thread Starter 
I see but the fan doesn't go any faster even when the CPU is scorching hot going to the 70C+. I'll try the 3 pin to see how it goes.
Alpha dawg
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CPUMotherboardGraphicsRAM
i3 2100 Gigabyte z68ma-d2h-b3 GTX 460 Hawk 8GB DDR3 1600 
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WD Scorpio Blue  Asus  H60 Windows 7 64x 
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Asus 24"  Antec neo eco 620W  Corsair 650D  
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Alpha dawg
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post #4 of 10
3 pin will always run at 100% unless your motherboard always fan control for them in the bios
Kilgore Trout
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Kilgore Trout
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post #5 of 10
Thread Starter 
I think that's as far as the fan could run. What bad advertisement! I put it on the 3 pin and fan controller and got the same results. Temperature drops drastically after I put table fan under the heat sink. I'll probably get different fan or cooler.
Alpha dawg
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WD Scorpio Blue  Asus  H60 Windows 7 64x 
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Alpha dawg
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WD Scorpio Blue  Asus  H60 Windows 7 64x 
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post #6 of 10
What model fan is it?
Kilgore Trout
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Kilgore Trout
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1TB Western Digital Black Caviar Asus CD+RW Noctua NH-C12p SE14 Windows 7 Home Premium x64 
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post #7 of 10
Thread Starter 
I'm using the stock fan...whatever fan that i got with my cpu cooler listed below. It is a weak sauce though, for overclocking. With a massive table fan underneath, temperature hoovers around 60C instead of 70+ like before.
Alpha dawg
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i3 2100 Gigabyte z68ma-d2h-b3 GTX 460 Hawk 8GB DDR3 1600 
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WD Scorpio Blue  Asus  H60 Windows 7 64x 
MonitorPowerCase
Asus 24"  Antec neo eco 620W  Corsair 650D  
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Alpha dawg
(11 items)
 
  
CPUMotherboardGraphicsRAM
i3 2100 Gigabyte z68ma-d2h-b3 GTX 460 Hawk 8GB DDR3 1600 
Hard DriveOptical DriveCoolingOS
WD Scorpio Blue  Asus  H60 Windows 7 64x 
MonitorPowerCase
Asus 24"  Antec neo eco 620W  Corsair 650D  
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post #8 of 10
That's a weak heatsink... if you're going to be overclocking get a thermalright venomous x with two gentle typhoon ap-15's or a noctua dh-14
Kilgore Trout
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Razer Death Adder 
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Kilgore Trout
(14 items)
 
  
CPUMotherboardGraphicsRAM
i7 950 EVGA X58 Sli Micro GTX 570 3x2GB G-Skill Ripjaw F3-12800CL8T 
Hard DriveOptical DriveCoolingOS
1TB Western Digital Black Caviar Asus CD+RW Noctua NH-C12p SE14 Windows 7 Home Premium x64 
MonitorKeyboardPowerCase
Samsung Syncmaster P2370HD TG3 BL82 w/ Cherry Clears Corsair AX850 Lian Li pc-v354a 
Mouse
Razer Death Adder 
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post #9 of 10
Thread Starter 
Yeah. It was a good rating cpu cooler and cheap when I bought it about a year ago. I wasn't planning on overclocking either so I preferred the quiet kind. Now, I care more about performance, not so much on noise.
Alpha dawg
(11 items)
 
  
CPUMotherboardGraphicsRAM
i3 2100 Gigabyte z68ma-d2h-b3 GTX 460 Hawk 8GB DDR3 1600 
Hard DriveOptical DriveCoolingOS
WD Scorpio Blue  Asus  H60 Windows 7 64x 
MonitorPowerCase
Asus 24"  Antec neo eco 620W  Corsair 650D  
  hide details  
Reply
Alpha dawg
(11 items)
 
  
CPUMotherboardGraphicsRAM
i3 2100 Gigabyte z68ma-d2h-b3 GTX 460 Hawk 8GB DDR3 1600 
Hard DriveOptical DriveCoolingOS
WD Scorpio Blue  Asus  H60 Windows 7 64x 
MonitorPowerCase
Asus 24"  Antec neo eco 620W  Corsair 650D  
  hide details  
Reply
post #10 of 10
You can get a power cable (fan to molex), that will force it to run at full speed!

I second the VenX!!!
Game Killer
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Game Killer
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Intel i7 990 extreme @ 4.2GHz ASRock X58 Extreme MSI GTX-580 lightning G.Skill Ripjaws X DDR3-2000 9-9-9-24 
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Intel 510 250Gb SSD WD RE4 250Gb x 4 Raid-0 Plextor DVR 880SA VenomousX 
OSKeyboardPowerCase
W7 Razor Lycosa PC power & cooling 950 CM ATCS-840 
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SB Xf-i Xtreme Professional, Z2300 speakers WD 1Tb external SATA II 64Mb cache HD 
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