There is a plenty diversity in information units through the code, command-line options, GUI and logs. Here are some examples:

`-dbcache`
**megabytes** in CL and GUI _vs_ **MiB** in logs and code (constants in [txdb.h](https://github.com/bitcoin/bitcoin/blob/master/src/txdb.h))

`-prune`
**MiB** in CL _vs_ **GB** in GUI. Also, setting prune = 1 GB in GUI gives _incorrect_ prune target = 1000 MiB.

Which prefix type -- binary (a power of 2) or SI (a power of 10) -- is preferable in the Bitcoin Core project?
return QVariant();
        }
    }
    return QVariant();
}
bool OptionsModel::setData(const QModelIndex & index, const QVariant & value, int role)
{
    bool successful = true; 
    if(role == Qt::EditRole)
    {
        QSettings settings;
        switch(index.row())
        {
        case StartAtStartup:
            successful = GUIUtil::SetStartOnSystemStartup(value.toBool());
            break;
        case HideTrayIcon:
            fHideTrayIcon = value.toBool();
            settings.setValue("fHideTrayIcon", fHideTrayIcon);
    		Q_EMIT hideTrayIconChanged(fHideTrayIcon);
            break;
        case MinimizeToTray:
            fMinimizeToTray = value.toBool();
            settings.setValue("fMinimizeToTray", fMinimizeToTray);
            break;
        case MapPortUPnP: 
            settings.setValue("fUseUPnP", value.toBool());
            m_node.mapPort(value.toBool());
            break;
        case MinimizeOnClose: