Heatsink question - Raspberry Pi Forums

i overclock raspberry pi 2 use kodi on raspbian (it looks slow , have wait 3 seconds every operation). setup is:

code: select all

boot_delay=1 initial_turbo=30 arm_freq=1050 core_freq=500 sdram_freq=500 over_voltage=4 temp_limit=70 gpu_mem=320

idle temps ~49°c , kodi ones ~56°c. if know these pretty normal values, put 2 pieces of aluminium heatsink small fan (12v 0.07a) on it.
high 1 fan, height does't create problems fan placed on top, while small 1 sized soc (using middle line), , usb/ethernet chip (using lateral line).
1 suggest me cooling?
also, need thermal adesive or thermal paste?
if in opinion don't notice significant temperature difference between 2 types, suggest me 1 of them or part of each 1 (for praticality)?
tried connect fan first 2 right gpio (5v) didn't start, when if connected pc motherboard (12v) starts, think problem is?
setup safe or change something?
know these lot of questions didn't want open lot of different threads me, , i'll glad of of answers, in advance

alphajack wrote:i overclock raspberry pi 2 use kodi on raspbian (it looks slow , have wait 3 seconds every operation). setup is:

code: select all

boot_delay=1 initial_turbo=30 arm_freq=1050 core_freq=500 sdram_freq=500 over_voltage=4 temp_limit=70 gpu_mem=320

idle temps ~45°c , kodi ones ~55°c.
1 suggest me cooling?

neither. if reach 55°c cooling unnecessary.

alphajack wrote: also, need thermal adesive or thermal paste?

if use heatsink, thermal paste necessary make work properly.

alphajack wrote: if in opinion don't notice significant temperature difference between 2 types, suggest me 1 of them or part of each 1 (for praticality)?

whatever fits best.

alphajack wrote: tried connect fan first 2 right gpio (5v) didn't start, when if connected pc motherboard (12v) starts, think problem is?

if used 2 5v pins, connected together, both @ same voltage. need 1 5v , 1 0v pin. 12v fan designed 12v, there no guarantee start @ 5v. heatsink on pi2, not need fan. without heatsink, won't anyway.

alphajack wrote: setup safe or change something?

afaict, quite safe. pi can run 85°c without problems.

raspberrypi