--- xf86-video-ati/src/radeon_driver.c.org	2006-11-28 17:53:13.000000000 +0800
+++ xf86-video-ati/src/radeon_driver.c	2006-11-29 18:07:12.000000000 +0800
@@ -1096,12 +1096,9 @@
     if (info->ChipFamily == CHIP_FAMILY_RV100 && !info->HasCRTC2) {
         /* Avoid RN50 corruption due to memory bandwidth starvation.
          * 18 is an empirical value based on the databook and Windows driver.
-         *
-	 * Empirical value changed to 24 to raise pixel clock limit and
-	 * allow higher resolution modes on capable monitors
 	 */
         pll->max_pll_freq = min(pll->max_pll_freq,
-                               24 * info->mclk * 100 / pScrn->bitsPerPixel *
+                               18 * info->mclk * 100 / pScrn->bitsPerPixel *
                                info->RamWidth / 16);
     }