after searching in this forums and web sites i went to fry today and saw 2 items that have blowing out air instead of sucking in and they are bytecc nc-500 ($24.99) and vantec lpc-201 ($39.99)
here is the descriptions of the vantec:
# Dimension: 300.0x 263.0x 45.0 mm
# Rated Voltage: DC 5V
# Max. Current: 2.0A
# Fan Speed: 1800-2500 RPM
# Airflow: 31.6CFM
# Noise Level: 26 dBA
# Bearing Type: Ball Bearing
# USB Type: USB 2.0 Hub, USB 1.1 Compatible
# USB Wire Length: 180.0 cm
# Pad Material: Aluminum & ABS
# Weight: 560.0 g
# Switching Power:
# Input 100~120V
# Output 5V 2.0A
here is the descriptions of bytecc:
Aluminum housing 300mm x 230mm x 2mm
Fan dimension 60mm x 60mm x 15mm
Fan bearing Ball bearing
Fan speed 3200~3500
Air flow 40 CFM
Noise 25 dba
Ps2 power adapter 5V, 085A
i picked the bytecc based on its $, fan speed, airflow, and noise even the vantec has adjutable speed and larger dimensions. i managed to put 8790 on the bytecc but the fan from the far right is about a half out of the bytecc.
the bytecc has the usb-ps2 adapter which i use one of the usb ports and therefore i have an extra ps2 connector.
the bytecc does its job by keeping the cpu and hard drive temperature constant about 42c while i am typing this message. if i hit the full blast then the temperature would quickly drops to 38c in about 2 minutes. i also am doing the 3dmark03 and 3dmark2001se test and the cpu temperature is 52c and hard drive is 44c.
i don't expect this bytecc or any cooler would reduce the temperture dramatically but to keep the temperature from raising. i notice that the air from the back vent is hotter than before and it means that the heat inside the machine is getting out more or faster.
i will keep the bytecc this weekend to test it then i will exchange it with the vantec for comparison... nah .. i will keep this bytecc.