diff --git a/control-vm.sh b/control-vm.sh
index 68507f0..c934f30 100755
--- a/control-vm.sh
+++ b/control-vm.sh
@@ -48,8 +48,8 @@
 # cat << _EOF > "${GUEST_NAME}/virtual-machine.bash"
 # # Provide the GUEST_NAME which is used in further configuration.
 # GUEST_NAME="Guest-OS"
-# # Configure the number of CPUs.
-# CPUS="2"
+# # Configure the number of CPUs. Simplified and based on
+# # `qemu-system-<arch> -smp help`.
 # CPU_CORES="8"
 # MEMORY="16384"
 # NET="True"
@@ -70,8 +70,7 @@
 
 # === Define default values ===
 CLIPBOARD="${CLIPBOARD:-}"
-CPUS="${CPUS:-16}"
-CPU_CORES="${CPU_CORES:-1}"
+CPU_CORES="${CPU_CORES:-8}"
 EFI="${EFI:-True}"
 GUEST_NAME="${1}"
 LIVE_ONLY="${LIVE_ONLY:-}"
@@ -115,7 +114,7 @@ QEMU_COMMON_ARGS=(
     # Use the same CPU as the host has for maximum performoance and configure
     # the amount of memory and CPU cores as configured per-host.
     -cpu host
-    -smp cpus="${CPUS}",maxcpus="${CPUS}",cores="${CPU_CORES}"
+    -smp cores="${CPU_CORES}"
     -m "${MEMORY}"
     # Detach from the current shell and monitor by pid file and a unix socket.
     -daemonize