diff --git a/src/config.sh b/src/config.sh
index 60e6c05..9725628 100644
--- a/src/config.sh
+++ b/src/config.sh
@@ -4,21 +4,29 @@ set -Eeuo pipefail
 KVM_ERR=""
 KVM_OPTS=""
 
-if [ -e /dev/kvm ] && sh -c 'echo -n > /dev/kvm' &> /dev/null; then
-  if ! grep -q -e vmx -e svm /proc/cpuinfo; then
-    KVM_ERR="(vmx/svm disabled)"
-  fi
-else
-  [ -e /dev/kvm ] && KVM_ERR="(no write access)" || KVM_ERR="(device file missing)"
-fi
+if [ "$ARCH" == "amd64" ]; then
 
-if [ -n "$KVM_ERR" ]; then
-  if [ "$ARCH" == "amd64" ]; then
+  if [ -e /dev/kvm ] && sh -c 'echo -n > /dev/kvm' &> /dev/null; then
+    if ! grep -q -e vmx -e svm /proc/cpuinfo; then
+      KVM_ERR="(vmx/svm disabled)"
+    fi
+  else
+    [ -e /dev/kvm ] && KVM_ERR="(no write access)" || KVM_ERR="(device file missing)"
+  fi
+
+  if [ -n "$KVM_ERR" ]; then
     error "KVM acceleration not detected $KVM_ERR, see the FAQ about this."
     [[ "$DEBUG" != [Yy1]* ]] && exit 88
+  else
+    if [ "$CPU_MODEL" == "host" ]; then
+      if ! grep -qE '^flags.* (sse4_2)' /proc/cpuinfo; then
+        error "Your CPU does not have the SSE4.2 instruction set, which is required by DSM."
+        [[ "$DEBUG" != [Yy1]* ]] && exit 89
+      fi
+    fi
+    KVM_OPTS=",accel=kvm -enable-kvm -cpu $CPU_MODEL"
   fi
-else
-  KVM_OPTS=",accel=kvm -enable-kvm -cpu host"
+
 fi
 
 DEF_OPTS="-nographic -nodefaults -boot strict=on -display none"