diff --git a/canframemodel.cpp b/canframemodel.cpp
index 07e2869..985e7c2 100644
--- a/canframemodel.cpp
+++ b/canframemodel.cpp
@@ -3,6 +3,7 @@
 #include <QFile>
 #include <QApplication>
 #include <QPalette>
+#include <QDateTime>
 #include "utility.h"
 
 
@@ -91,6 +92,16 @@ void CANFrameModel::setSecondsMode(bool mode)
     }
 }
 
+void CANFrameModel::setSysTimeMode(bool mode)
+{
+    if (useSystemTime != mode)
+    {
+        this->beginResetModel();
+        useSystemTime = mode;
+        this->endResetModel();
+    }
+}
+
 void CANFrameModel::setInterpetMode(bool mode)
 {
     //if the state of interpretFrames changes then we need to reset the model
@@ -237,8 +248,11 @@ QVariant CANFrameModel::data(const QModelIndex &index, int role) const
         switch (index.column())
         {
         case 0: //timestamp
-            if (!timeSeconds) return QString::number(thisFrame.timestamp);
-            else return QString::number((double)thisFrame.timestamp / 1000000.0, 'f', 6);
+            if (!useSystemTime) {
+                if (!timeSeconds) return QString::number(thisFrame.timestamp);
+                else return QString::number((double)thisFrame.timestamp / 1000000.0, 'f', 6);
+            }
+            else return QDateTime::fromMSecsSinceEpoch(thisFrame.timestamp / 1000).toString("MMM-dd HH:mm:ss.zzz");
             break;
         case 1: //id
             return Utility::formatNumber(thisFrame.ID);
diff --git a/canframemodel.h b/canframemodel.h
index ba36746..a934eff 100644
--- a/canframemodel.h
+++ b/canframemodel.h
@@ -23,7 +23,7 @@ public:
     QVariant headerData(int section, Qt::Orientation orientation,
                         int role = Qt::DisplayRole) const;
     int columnCount(const QModelIndex &) const;
-    int totalFrameCount();    
+    int totalFrameCount();
 
     void sendRefresh();
     void sendRefresh(int);
@@ -32,6 +32,7 @@ public:
     void setInterpetMode(bool);
     void setOverwriteMode(bool);
     void setHexMode(bool);
+    void setSysTimeMode(bool);
     void setFilterState(unsigned int ID, bool state);
     void setAllFilters(bool state);
     void setSecondsMode(bool);
@@ -63,6 +64,7 @@ private:
     bool overwriteDups; //should we display all frames or only the newest for each ID?
     bool useHexMode;
     bool timeSeconds;
+    bool useSystemTime;
     bool needFilterRefresh;
     uint64_t timeOffset;
     int lastUpdateNumFrames;
diff --git a/config.h b/config.h
index a9b6119..3967ab2 100644
--- a/config.h
+++ b/config.h
@@ -1,7 +1,7 @@
 #ifndef CONFIG
 #define CONFIG
 
-#define VERSION             169
+#define VERSION             170
 
 //try to keep this in sync.
 //SavvyCAN will complain if you connect a GVRET board with a revision
diff --git a/connections/canconmanager.cpp b/connections/canconmanager.cpp
index 4484906..ef099c2 100644
--- a/connections/canconmanager.cpp
+++ b/connections/canconmanager.cpp
@@ -1,4 +1,5 @@
 #include <QDateTime>
+#include <QSettings>
 
 #include "canconmanager.h"
 
@@ -24,6 +25,14 @@ CANConManager::CANConManager(QObject *parent): QObject(parent)
     mNumActiveBuses = 0;
 
     resetTimeBasis();
+
+    QSettings settings;
+
+    if (settings.value("Main/TimeClock", false).toBool())
+    {
+        useSystemTime = true;
+    }
+    else useSystemTime = false;
 }
 
 void CANConManager::resetTimeBasis()
@@ -168,7 +177,8 @@ bool CANConManager::sendFrame(const CANFrame& pFrame)
         {
             workingFrame.bus -= busBase;
             workingFrame.isReceived = false;
-            workingFrame.timestamp = ((QDateTime::currentMSecsSinceEpoch() * 1000) - mTimestampBasis);
+            workingFrame.timestamp = (QDateTime::currentMSecsSinceEpoch() * 1000);
+            if (!useSystemTime) workingFrame.timestamp -= mTimestampBasis;
             txFrame = conn->getQueue().get();
             *txFrame = workingFrame;
             conn->getQueue().queue();
diff --git a/connections/canconmanager.h b/connections/canconmanager.h
index 0918358..1056f5b 100644
--- a/connections/canconmanager.h
+++ b/connections/canconmanager.h
@@ -74,6 +74,7 @@ private:
     QTimer                 mTimer;
     uint64_t               mTimestampBasis;
     uint32_t               mNumActiveBuses;
+    bool useSystemTime;
 };
 
 #endif // CANCONNECTIONMODEL_H
diff --git a/connections/canconnection.cpp b/connections/canconnection.cpp
index 1575492..049468e 100644
--- a/connections/canconnection.cpp
+++ b/connections/canconnection.cpp
@@ -1,3 +1,4 @@
+#include <QSettings>
 #include <QThread>
 #include "canconnection.h"
 
@@ -79,6 +80,14 @@ void CANConnection::start()
     /* set started flag */
     mStarted = true;
 
+    QSettings settings;
+
+    if (settings.value("Main/TimeClock", false).toBool())
+    {
+        useSystemTime = true;
+    }
+    else useSystemTime = false;
+
     /* in multithread case, this will be called before entering thread event loop */
     return piStarted();
 }
diff --git a/connections/canconnection.h b/connections/canconnection.h
index aaf7d9f..c659cab 100644
--- a/connections/canconnection.h
+++ b/connections/canconnection.h
@@ -237,6 +237,7 @@ protected:
     void setCapSuspended(bool pIsSuspended);
 
 protected:
+    bool useSystemTime;
 
     /**************************************************************/
     /***********     protected interface to implement       *******/
diff --git a/connections/gvretserial.cpp b/connections/gvretserial.cpp
index ffcb5dd..b8f24c6 100644
--- a/connections/gvretserial.cpp
+++ b/connections/gvretserial.cpp
@@ -400,6 +400,10 @@ void GVRetSerial::procRXChar(unsigned char c)
             buildFrame.timestamp |= (uint)c << 24;
 
             buildFrame.timestamp += timeBasis;
+            if (useSystemTime)
+            {
+                buildFrame.timestamp = QDateTime::currentMSecsSinceEpoch() * 1000l;
+            }
             break;
         case 4:
             buildFrame.ID = c;
diff --git a/connections/socketcan.cpp b/connections/socketcan.cpp
index a653c27..63e7b4a 100644
--- a/connections/socketcan.cpp
+++ b/connections/socketcan.cpp
@@ -1,6 +1,7 @@
 #include <QObject>
 #include <QDebug>
 #include <QCanBusFrame>
+#include <QDateTime>
 
 #include "socketcan.h"
 
@@ -189,7 +190,10 @@ void SocketCan::framesReceived()
                 frame_p->extended      = false;
                 frame_p->ID            = recFrame.frameId();
                 frame_p->isReceived    = true;
-                frame_p->timestamp     = (recFrame.timeStamp().seconds()*1000000 + recFrame.timeStamp().microSeconds()) - timeBasis;
+                if (useSystemTime) {
+                    frame_p->timestamp = QDateTime::currentMSecsSinceEpoch() * 1000ul;
+                }
+                else frame_p->timestamp     = (recFrame.timeStamp().seconds() * 1000000ul + recFrame.timeStamp().microSeconds()) - timeBasis;
 
                 checkTargettedFrame(*frame_p);
 
diff --git a/mainsettingsdialog.cpp b/mainsettingsdialog.cpp
index a4671cc..caa242a 100644
--- a/mainsettingsdialog.cpp
+++ b/mainsettingsdialog.cpp
@@ -26,7 +26,31 @@ MainSettingsDialog::MainSettingsDialog(QWidget *parent) :
     ui->cbRestorePositions->setChecked(settings->value("Main/SaveRestorePositions", true).toBool());
     ui->cbValidate->setChecked(settings->value("Main/ValidateComm", true).toBool());
     ui->spinPlaybackSpeed->setValue(settings->value("Playback/DefSpeed", 5).toInt());
-    ui->cbTimeSeconds->setChecked(settings->value("Main/TimeSeconds", false).toBool());
+
+    bool secondsMode = settings->value("Main/TimeSeconds", false).toBool();
+    bool clockMode = settings->value("Main/TimeClock", false).toBool();
+    if (clockMode)
+    {
+        ui->rbSeconds->setChecked(false);
+        ui->rbMicros->setChecked(false);
+        ui->rbSysClock->setChecked(true);
+    }
+    else
+    {
+        if (secondsMode)
+        {
+            ui->rbSeconds->setChecked(true);
+            ui->rbMicros->setChecked(false);
+            ui->rbSysClock->setChecked(false);
+        }
+        else
+        {
+            ui->rbSeconds->setChecked(false);
+            ui->rbMicros->setChecked(true);
+            ui->rbSysClock->setChecked(false);
+        }
+    }
+
     ui->comboSendingBus->setCurrentIndex(settings->value("Playback/SendingBus", 4).toInt());
     ui->cbUseFiltered->setChecked(settings->value("Main/UseFiltered", false).toBool());
 
@@ -40,7 +64,9 @@ MainSettingsDialog::MainSettingsDialog(QWidget *parent) :
     connect(ui->cbRestorePositions, SIGNAL(toggled(bool)), this, SLOT(updateSettings()));
     connect(ui->cbValidate, SIGNAL(toggled(bool)), this, SLOT(updateSettings()));
     connect(ui->spinPlaybackSpeed, SIGNAL(valueChanged(int)), this, SLOT(updateSettings()));
-    connect(ui->cbTimeSeconds, SIGNAL(toggled(bool)), this, SLOT(updateSettings()));
+    connect(ui->rbSeconds, SIGNAL(toggled(bool)), this, SLOT(updateSettings()));
+    connect(ui->rbMicros, SIGNAL(toggled(bool)), this, SLOT(updateSettings()));
+    connect(ui->rbSysClock, SIGNAL(toggled(bool)), this, SLOT(updateSettings()));
     connect(ui->comboSendingBus, SIGNAL(currentIndexChanged(int)), this, SLOT(updateSettings()));
     connect(ui->cbUseFiltered, SIGNAL(toggled(bool)), this, SLOT(updateSettings()));
 }
@@ -68,7 +94,8 @@ void MainSettingsDialog::updateSettings()
     settings->setValue("Main/SaveRestorePositions", ui->cbRestorePositions->isChecked());
     settings->setValue("Main/ValidateComm", ui->cbValidate->isChecked());
     settings->setValue("Playback/DefSpeed", ui->spinPlaybackSpeed->value());
-    settings->setValue("Main/TimeSeconds", ui->cbTimeSeconds->isChecked());
+    settings->setValue("Main/TimeSeconds", ui->rbSeconds->isChecked());
+    settings->setValue("Main/TimeClock", ui->rbSysClock->isChecked());
     settings->setValue("Playback/SendingBus", ui->comboSendingBus->currentIndex());
     settings->setValue("Main/UseFiltered", ui->cbUseFiltered->isChecked());
 
diff --git a/mainwindow.cpp b/mainwindow.cpp
index b4b9778..da2d0b4 100644
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -52,13 +52,13 @@ MainWindow::MainWindow(QWidget *parent) :
 
     readSettings();
 
-    ui->canFramesView->setColumnWidth(0, 110);
+    ui->canFramesView->setColumnWidth(0, 150);
     ui->canFramesView->setColumnWidth(1, 70);
     ui->canFramesView->setColumnWidth(2, 40);
     ui->canFramesView->setColumnWidth(3, 40);
     ui->canFramesView->setColumnWidth(4, 40);
     ui->canFramesView->setColumnWidth(5, 40);
-    ui->canFramesView->setColumnWidth(6, 275);
+    ui->canFramesView->setColumnWidth(6, 225);
     QHeaderView *HorzHdr = ui->canFramesView->horizontalHeader();
     HorzHdr->setStretchLastSection(true); //causes the data column to automatically fill the tableview
 
@@ -256,19 +256,6 @@ void MainWindow::readSettings()
         ui->cbAutoScroll->setChecked(true);
     }
 
-    /*
-    int cType = settings.value("Main/DefaultConnectionType", 0).toInt();
-    if (cType == 0) connType = "GVRET";
-    if (cType == 1) connType = "KVASER";
-    if (cType == 2) connType = "SOCKETCAN";
-    portName = settings.value("Main/DefaultConnectionPort", "").toString();
-    */
-
-    //qDebug() << connType;
-    //qDebug() << portName;
-
-    //"Main/SingleWireMode"
-
     readUpdateableSettings();
 }
 
@@ -280,6 +267,8 @@ void MainWindow::readUpdateableSettings()
     Utility::decimalMode = !useHex;
     secondsMode = settings.value("Main/TimeSeconds", false).toBool();
     model->setSecondsMode(secondsMode);
+    useSystemClock = settings.value("Main/TimeClock", false).toBool();
+    model->setSysTimeMode(useSystemClock);
     useFiltered = settings.value("Main/UseFiltered", false).toBool();
 }
 
diff --git a/mainwindow.h b/mainwindow.h
index 4a03275..a75c9c6 100644
--- a/mainwindow.h
+++ b/mainwindow.h
@@ -126,6 +126,7 @@ private:
     bool useHex;
     bool allowCapture;
     bool secondsMode;
+    bool useSystemClock;
     bool bDirty; //have frames been added or subtracted since the last save/load?
     bool useFiltered; //should sub-windows use the unfiltered or filtered frames list?
 
diff --git a/ui/mainsettingsdialog.ui b/ui/mainsettingsdialog.ui
index b7f15a3..b1f38d9 100644
--- a/ui/mainsettingsdialog.ui
+++ b/ui/mainsettingsdialog.ui
@@ -7,7 +7,7 @@
     <x>0</x>
     <y>0</y>
     <width>400</width>
-    <height>580</height>
+    <height>687</height>
    </rect>
   </property>
   <property name="windowTitle">
@@ -42,10 +42,57 @@
        </widget>
       </item>
       <item>
-       <widget class="QCheckBox" name="cbTimeSeconds">
-        <property name="text">
-         <string>Display time in seconds</string>
+       <widget class="QGroupBox" name="groupBox_6">
+        <property name="title">
+         <string>Time Keeping</string>
         </property>
+        <layout class="QVBoxLayout" name="verticalLayout_7">
+         <item>
+          <widget class="QLabel" name="label_3">
+           <property name="text">
+            <string>Seconds/Microseconds are dongle based</string>
+           </property>
+          </widget>
+         </item>
+         <item>
+          <layout class="QHBoxLayout" name="horizontalLayout_4">
+           <item>
+            <widget class="QRadioButton" name="rbSeconds">
+             <property name="text">
+              <string>Seconds</string>
+             </property>
+            </widget>
+           </item>
+           <item>
+            <widget class="QRadioButton" name="rbMicros">
+             <property name="text">
+              <string>Microseconds</string>
+             </property>
+            </widget>
+           </item>
+           <item>
+            <spacer name="horizontalSpacer">
+             <property name="orientation">
+              <enum>Qt::Horizontal</enum>
+             </property>
+             <property name="sizeHint" stdset="0">
+              <size>
+               <width>40</width>
+               <height>20</height>
+              </size>
+             </property>
+            </spacer>
+           </item>
+           <item>
+            <widget class="QRadioButton" name="rbSysClock">
+             <property name="text">
+              <string>System Clock</string>
+             </property>
+            </widget>
+           </item>
+          </layout>
+         </item>
+        </layout>
        </widget>
       </item>
       <item>