diff --git a/gns3server/controller/gns3vm/__init__.py b/gns3server/controller/gns3vm/__init__.py
index 6a745d15..c18e60a4 100644
--- a/gns3server/controller/gns3vm/__init__.py
+++ b/gns3server/controller/gns3vm/__init__.py
@@ -49,6 +49,7 @@ class GNS3VM:
             "headless": False,
             "enable": False,
             "engine": "vmware",
+            "allocate_vcpus_ram": True,
             "ram": 2048,
             "vcpus": 1,
             "port": 80,
@@ -311,6 +312,7 @@ class GNS3VM:
             if self._settings["vmname"] is None:
                 return
             log.info("Start the GNS3 VM")
+            engine.allocate_vcpus_ram = self._settings["allocate_vcpus_ram"]
             engine.vmname = self._settings["vmname"]
             engine.ram = self._settings["ram"]
             engine.vcpus = self._settings["vcpus"]
diff --git a/gns3server/controller/gns3vm/base_gns3_vm.py b/gns3server/controller/gns3vm/base_gns3_vm.py
index c111989a..14d8aae4 100644
--- a/gns3server/controller/gns3vm/base_gns3_vm.py
+++ b/gns3server/controller/gns3vm/base_gns3_vm.py
@@ -30,6 +30,7 @@ class BaseGNS3VM:
         self._ip_address = None
         self._port = 80  # value not used, will be overwritten
         self._headless = False
+        self._allocate_vcpus_ram = True
         self._vcpus = 1
         self._ram = 1024
         self._user = ""
@@ -203,6 +204,26 @@ class BaseGNS3VM:
 
         self._headless = value
 
+    @property
+    def allocate_vcpus_ram(self):
+        """
+        Returns whether VCPUs and RAM settings should be configured for the GNS3 VM.
+
+        :returns: boolean
+        """
+
+        return self._allocate_vcpus_ram
+
+    @allocate_vcpus_ram.setter
+    def allocate_vcpus_ram(self, value):
+        """
+        Sets whether VCPUs and RAM settings should be configured for the GNS3 VM.
+
+        :param value: boolean
+        """
+
+        self._allocate_vcpus_ram = value
+
     @property
     def vcpus(self):
         """
diff --git a/gns3server/controller/gns3vm/hyperv_gns3_vm.py b/gns3server/controller/gns3vm/hyperv_gns3_vm.py
index e756635c..45186cdf 100644
--- a/gns3server/controller/gns3vm/hyperv_gns3_vm.py
+++ b/gns3server/controller/gns3vm/hyperv_gns3_vm.py
@@ -251,9 +251,10 @@ class HyperVGNS3VM(BaseGNS3VM):
             raise GNS3VMError("Could not find Hyper-V VM {}".format(self.vmname))
 
         if not self._is_running():
-            log.info("Update GNS3 VM settings (CPU and RAM)")
-            # set the number of vCPUs and amount of RAM
-            self._set_vcpus_ram(self.vcpus, self.ram)
+            if self.allocate_vcpus_ram:
+                log.info("Update GNS3 VM settings (CPU and RAM)")
+                # set the number of vCPUs and amount of RAM
+                self._set_vcpus_ram(self.vcpus, self.ram)
 
             # start the VM
             try:
diff --git a/gns3server/controller/gns3vm/remote_gns3_vm.py b/gns3server/controller/gns3vm/remote_gns3_vm.py
index 48a89d53..386c0a20 100644
--- a/gns3server/controller/gns3vm/remote_gns3_vm.py
+++ b/gns3server/controller/gns3vm/remote_gns3_vm.py
@@ -15,8 +15,6 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-import asyncio
-
 from .base_gns3_vm import BaseGNS3VM
 from .gns3_vm_error import GNS3VMError
 
diff --git a/gns3server/controller/gns3vm/virtualbox_gns3_vm.py b/gns3server/controller/gns3vm/virtualbox_gns3_vm.py
index 874cca36..ddb6b3ea 100644
--- a/gns3server/controller/gns3vm/virtualbox_gns3_vm.py
+++ b/gns3server/controller/gns3vm/virtualbox_gns3_vm.py
@@ -259,9 +259,12 @@ class VirtualBoxGNS3VM(BaseGNS3VM):
         log.info('"{}" state is {}'.format(self._vmname, vm_state))
 
         if vm_state == "poweroff":
-            log.info("Update GNS3 VM settings (CPU, RAM and Hardware Virtualization)")
-            await self.set_vcpus(self.vcpus)
-            await self.set_ram(self.ram)
+            if self.allocate_vcpus_ram:
+                log.info("Update GNS3 VM vCPUs and RAM settings")
+                await self.set_vcpus(self.vcpus)
+                await self.set_ram(self.ram)
+
+            log.info("Update GNS3 VM Hardware Virtualization setting")
             await self.enable_nested_hw_virt()
 
         if vm_state in ("poweroff", "saved"):
diff --git a/gns3server/controller/gns3vm/vmware_gns3_vm.py b/gns3server/controller/gns3vm/vmware_gns3_vm.py
index a7a03e8e..44bc38f3 100644
--- a/gns3server/controller/gns3vm/vmware_gns3_vm.py
+++ b/gns3server/controller/gns3vm/vmware_gns3_vm.py
@@ -148,9 +148,12 @@ class VMwareGNS3VM(BaseGNS3VM):
         except VMwareError as e:
             raise GNS3VMError("Could not list VMware VMs: {}".format(str(e)))
         if not running:
-            log.info("Update GNS3 VM settings (CPU, RAM and Hardware Virtualization)")
             # set the number of vCPUs and amount of RAM
-            await self._set_vcpus_ram(self.vcpus, self.ram)
+            if self.allocate_vcpus_ram:
+                log.info("Update GNS3 VM vCPUs and RAM settings")
+                await self._set_vcpus_ram(self.vcpus, self.ram)
+
+            log.info("Update GNS3 VM Hardware Virtualization setting")
             await self._set_extra_options()
 
             # start the VM
diff --git a/gns3server/schemas/gns3vm.py b/gns3server/schemas/gns3vm.py
index c713c8d2..32367eb8 100644
--- a/gns3server/schemas/gns3vm.py
+++ b/gns3server/schemas/gns3vm.py
@@ -41,6 +41,10 @@ GNS3VM_SETTINGS_SCHEMA = {
             "description": "The engine to use for the VM. Null to disable",
             "enum": ["vmware", "virtualbox", None]
         },
+        "allocate_vcpus_ram": {
+            "description": "Allocate vCPUS and RAM settings",
+            "type": "boolean"
+        },
         "vcpus": {
             "description": "Number of vCPUS affected to the VM",
             "type": "integer"