[DanielPT]

Hey all.

I want to overclock my rpi 2.

But i have made setting "Turbo" in the config file.

# Overclock mode settings.
#
# default recommended values are: arm_freq | core_freq | sdram_freq | over_voltage
# no overclocking : 700 | 250 | 400 | 0
# mode 'Modest' : 800 | 300 | 400 | 0
# mode 'Medium' : 900 | 333 | 450 | 2
# mode 'High' : 950 | 450 | 450 | 6
# mode 'Turbo' : 1000 | 500 | 500 | 6

Overclock mode settings.
#
# default recommended values are: arm_freq | core_freq | sdram_freq | over_voltage
# no overclocking : 700 | 250 | 400 | 0
# mode 'Modest' : 800 | 300 | 400 | 0
# mode 'Medium' : 900 | 333 | 450 | 2
# mode 'High' : 950 | 450 | 450 | 6
# mode 'Turbo' : 1000 | 500 | 600 | 6
# mode 'Pi2' : 1000 | 500 | 500 | 2

# arm_freq=1000
# core_freq=500
# sdram_freq=600
# over_voltage=6

# set to 'force_turbo=1' to disable dynamic overclocking (you can lose your warranty!)
force_turbo=0

Meaby i shall use the "pi2" setting and force turbo?

I can seet in the system info that it runs 600 mhz.

Regards Daniel and thanks

[popcornmix]

The frequency is dynamic. It will be 600MHz when idle (all cores before 50% CPU), and 900MHz when busy.

[DanielPT]

Hi thanks

It feels a bit slow when i play a movie and go a step further it takes a bit long to do it.

I tryed this

force_turbo=1 #Voids Warranty!
boot_delay=1 #helps to avoid sdcard corruption when force_turbo is enabled.
arm_freq=1000
sdram_freq=500
core_freq=500
over_voltage=2
temp_limit=80 #Will throttle to default clock speed if hit.
disable_splash=1

But i get the full screen rainbow.
I have a 2A power supply.

Can somebody help?

Regards Daniel

[popcornmix]

Can somebody help?

Start with:

Code:

force_turbo=1 #Voids Warranty!

and check that works. Then change one thing at a time checking it still boots.
I'd add in the order:
over_voltage, arm_freq, core_freq, sdram_freq

Ignore the other settings.

[DanielPT]

Hi popcorn.

Thanks for youre time.

This works:

boot_delay=1
arm_freq=1000
sdram_freq=500
core_freq=500
over_voltage=2

What will you add next?

[popcornmix]

To be honest from this point the gains are small and the risk of crashing is quite high. Backing up before experimenting is advisable.

You can increase over_voltage (e.g. to 4) and then you may be able to increase arm_freq and core_freq a little (50 to 100 more is about the limit but will probably crash).
You can also add gpu_freq=400 (again could possibly be increased to 500).

sdram may also be increased. e.g.

Code:

sdram_freq=580
over_voltage_sdram=5
sdram_schmoo=0x02000020

[DanielPT]

Hi Popcorn.

If the risk is to high and the gains to small i wont try more. Im not so good at this.

But "force_turbo" will that gain alot?

But can you tell me.
When i set the arm_freq to 1000. Why does it only runs 900 mhz when under load? Why not 1000 ?

Regards Daniel

[popcornmix]

But "force_turbo" will that gain alot?

Not much. It means it uses turbo mode all the time, rather than only when busy.
There is not a lot of point in running fast when you have nothing to do.
Because there is a little latency in switching to turbo mode, you do get a slight benefit always being in turbo mode, but it is small.

[DanielPT]

Hi Popcorn.
Okay thanks

What will youre advise be if i think it runs a bit slow when playing a movie? Browsing is fast but when i "skip" 10 sec it takes a little time to do it.

/Daniel

[popcornmix]

What will youre advise be if i think it runs a bit slow when playing a movie? Browsing is fast but when i "skip" 10 sec it takes a little time to do it.

Where is the movie? Over network or local disk?
Wired or wireless ethernet?
What is the type of the file (e.g. mkv?)
How long does it take?

[DanielPT]

What will youre advise be if i think it runs a bit slow when playing a movie? Browsing is fast but when i "skip" 10 sec it takes a little time to do it.

Where is the movie? Over network or local disk?
Wired or wireless ethernet?
What is the type of the file (e.g. mkv?)
How long does it take?

Uh sorry about the lack of info

On a NFS share on a server on my lan.
Wired 1000 mbit.
.mkv file 1080p.
No problem with openelec 7.0.
About 1 sec between the skips.

[DanielPT]

No good advise?