diff --git a/src/radeon_driver.c b/src/radeon_driver.c
index d039920..efb3dec 100644
--- a/src/radeon_driver.c
+++ b/src/radeon_driver.c
@@ -1388,7 +1388,7 @@ static void RADEONInitMemoryMap(ScrnInfoPtr pScrn)
      * but the real video RAM instead
      */
     if (info->ChipFamily >= CHIP_FAMILY_R600) {
-	mem_size = INREG(R600_CONFIG_MEMSIZE);
+	mem_size = 0x10000000;//INREG(R600_CONFIG_MEMSIZE);
 	aper_size = INREG(R600_CONFIG_APER_SIZE);
     } else {
 	mem_size = INREG(RADEON_CONFIG_MEMSIZE);
@@ -1679,7 +1679,7 @@ static Bool RADEONPreInitVRAM(ScrnInfoPtr pScrn)
 	OUTREG(RADEON_CONFIG_MEMSIZE, pScrn->videoRam * 1024);
     } else {
 	if (info->ChipFamily >= CHIP_FAMILY_R600)
-	    pScrn->videoRam = INREG(R600_CONFIG_MEMSIZE) / 1024;
+	    pScrn->videoRam = 0x10000000 / 1024;//INREG(R600_CONFIG_MEMSIZE) / 1024;
 	else {
 	    /* Read VRAM size from card */
 	    pScrn->videoRam      = INREG(RADEON_CONFIG_MEMSIZE) / 1024;