diff --git a/usr.sbin/bhyve/pci_fbuf.c b/usr.sbin/bhyve/pci_fbuf.c
--- a/usr.sbin/bhyve/pci_fbuf.c
+++ b/usr.sbin/bhyve/pci_fbuf.c
@@ -71,10 +71,10 @@
 
 #define	DMEMSZ	128
 
-#define	FB_SIZE		(16*MB)
+#define	FB_SIZE		(32*MB)
 
-#define COLS_MAX	1920
-#define	ROWS_MAX	1200
+#define COLS_MAX	3840
+#define ROWS_MAX	2160
 
 #define COLS_DEFAULT	1024
 #define ROWS_DEFAULT	768