Here is a list of console commands i have found for BF4 by using the ` key next to the 1
GameTime.MaxVariableFPS
Perfoverlay.DrawFPS
Perfoverlay.DrawFPSMethod
Perfoverlay.DrawGraph
Perfoverlay.Enable
Perfoverlay.GraphMethod
Perfoverlay.LegendDisplayFormat
Postprocess.BlurMethod
Postprocess.DofMethod
Postprocess.DynamicAOEnable
Postprocess.DynamicAOMethod
Render.DrawScreenInfo
Render.ResolutionScale
Render.VSyncFlashTestEnable
RenderDevice.Dx11Dot1Enable
RenderDevice.Dx11Dot1RuntimeEnable
RenderDevice.Dx11Enable
RenderDevice.ForceRenderAheadLimit
RenderDevice.StereoConvergenceScale
RenderDevice.StereoSeparationScale
RenderDevice.StereoSoldierZoomConvergenceScale
RenderDevice.TrippleBufferingEnable
RenderDevice.VSyncEnable
Screenshot.Format
Screenshot.Render
UI.drawEnable
Window.BordersEnable
Window.Height
Window.PosX
Window.PosY
Window.Width
WorldRender.LightTileCsPathEnable
WorldRender.MotionBlurEnable
WorldRender.MotionBlurFixedShutterTime
WorldRender.MotionBlurForceOn
WorldRender.MotionBlurFrameAverageCount
WorldRender.MotionBlurHax
WorldRender.MotionBlurMaxSampleCount
WorldRender.MotionBlurNoiseScale
WorldRender.MotionBlurQuality
WorldRender.MotionBlurScale
WorldRender.SpotLightShadowmapEnable
WorldRender.SpotLightShadowmapResolution
WorldRender.TransparencyShadowmapsEnable
without wishing to state the obvious for example :-
perfoverlay.drawfps 1 (turns the screen FPS counter on)
perfoverlay.drawfps 0 (turns it off)
same for most of the commands
you can also create a config file which will load your commands automatically when the game loads.
Back up all files before doing this as I found it a Royal pain in the arse to get it to stop loading but eventually it worked Sumprat just removed the config file and it was back to normal 
To create the config file
1. In Windows 7 or 8, click the Start button and then click inside the Search box. Type “notepad” and hit enter. Or in WIN 7, go to Start -> All Programs -> Accessories -> Notepad.
2. Type in the console commands you wish to run on start-up, one per line. The two most popular are perfoverlay.drawfps 1 and gametime.maxvariablefps 60.
3. Click the File menu in Notepad, then Save As.
4. Browse to the folder C:\Program Files (x86)\Origin Games\Battlefield 4.
5. In the “Save as type” drop down menu at the bottom, select “All Files”.
6. In the “File name” box type “user.cfg”.
7. Click the Save button.
Happy days
