diff --git a/src/add-ons/kernel/drivers/graphics/radeon_hd/radeon_hd.cpp b/src/add-ons/kernel/drivers/graphics/radeon_hd/radeon_hd.cpp
index a2689f1908..2851bffb41 100644
--- a/src/add-ons/kernel/drivers/graphics/radeon_hd/radeon_hd.cpp
+++ b/src/add-ons/kernel/drivers/graphics/radeon_hd/radeon_hd.cpp
@@ -109,12 +109,19 @@ radeon_hd_init(radeon_info &info)
 		info.shared_info->has_edid = false;
 	}
 
-	// Read R6XX memory size into shared info
-	info.shared_info->graphics_memory_size
-		= read32(info.registers + R6XX_CONFIG_MEMSIZE) >> 10;
+	// Populate graphics_memory_size with graphics memory size in KB
+	if (info.shared_info->device_chipset >= RADEON_R800) {
+		// R800+ has memory stored in MB
+		info.shared_info->graphics_memory_size
+			= read32(info.registers + R6XX_CONFIG_MEMSIZE) * 1024;
+	} else {
+		// R600-R700 has memory stored in bytes
+		info.shared_info->graphics_memory_size
+			= read32(info.registers + R6XX_CONFIG_MEMSIZE) >> 10;
+	}
 
-	TRACE("card(%ld): found %ld KB memory on card.\n", info.id,
-		info.shared_info->graphics_memory_size);
+	TRACE("card(%ld): found %ld MB memory on card.\n", info.id,
+		info.shared_info->graphics_memory_size / 1024);
 
 	TRACE("card(%ld): %s completed successfully!\n", info.id, __func__);
 	return B_OK;