Rovclock

General

Rovclock is a utility to control frequency rates of your Radeon card.

It is very helpfull for underclocking the Radeon chip in order to save power when running on batteries. Also, by underclocking it is possible to prevent the fan from running.

It can also be used to gain performance by overclocking.

Features

Used to under-/overclock Radeon gfx-cards.

• Controls GPU core frequency
• Controls gfx-memory frequency

Project Homepage / Availability

• Homepage: http://www.hasw.net/linux/

Usage

• Set the core frequency (-c) to 100 Mhz and the memory frequency (-m) to 120 Mhz.

$ sudo rovclock -c 100 -m 120

• Get current frequencies among other information (-i).

$ sudo rovclock -i

Minimum stable clockrates

• T42 with Radeon 7500
  NOTE: Setting the memory under 100Mhz may hang your card.
  • LCD: 100MHz core, 120MHz memory.
  • Using DVI output on Port replicator: 100Mhz core, 180MHz memory.
• T43 with ATI Mobility Radeon X300:
  • 100MHz core, 120Mz memory (see more here)
• Template:ATi AGP Card with ATi Radeon 9500Pro and 128mb memory:
  • 47.25MHz core, 155.75Mhz memory @ 1280x1024@75hz on DVI.
    Some minor 'static' might be noticable, 162.0Mhz on the memory resolves that though.

See also

• How to make use of Graphics Chips Power Management features using the DynamicClocks option of the radeon driver
• Gentoo forum discussion