| Priority | medium |
|---|---|
| Bug ID | 69721 |
| Assignee | dri-devel@lists.freedesktop.org |
| Summary | Can't reach maximum memory speed (or core speed) when using dpm=1 on r600g |
| Severity | normal |
| Classification | Unclassified |
| OS | All |
| Reporter | alexandre.f.demers@gmail.com |
| Hardware | All |
| Status | NEW |
| Version | XOrg CVS |
| Component | DRM/Radeon |
| Product | DRI |
After fixing bug 68235, it appears the maximum memory speed (or core speed) can't always be reached. This situation depends on the voltage tweaking seen on some cards. As an exemple, XFX HD-695X-ZNDC has the following maximum values: max_sclk_vddc->80000, max_mclk_vddci->125000, max_mclk_vddc->125000. However, the maximum memory clock value should be 130000 and the core clock should be 83000. As Alex Deucher explained: "This patch set works around the issue by limiting the sclk and mclk to the highest levels listed in the clk/voltage dependency tables. I'll need to dig a bit more internally to try and figure out how to handle these clks properly."
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