Games lagging what to replace?

1333Mghz Ram sounds the problem.
Front side BUS speed.

Do a scan on crucial.com for an upgrade.
1333Mghz DDR3 is used in netbooks.

Also, you need so much Hard Drive space for Virtual memory.
So if your Hard drive is full, this will cause the same problem.

That system shouldn't be lagging on anything very much, especially not Sims 4 or Minecraft. What is your definition of lag?

Crucial show for ram… Ddr3 1600 or ddr3 1866 no mention of 1333… If all you have is a 240gig SSD… Well, I have a 1T hard drive / windows 7… Some programs / some games / some music / backups and the likes and I've used up 210gigs…

You know you got a problem when minecraft is lagging

It might sound like a dumb question, but do you have your monitor plugged into the integrated graphics port rather than the video card? You'd be surprised how many people do that.

I'd start with checking RAM and CPU usage in Task Manager. See if there are any programs hogging the CPU or using a crazy amount of RAM.

Then I'd check system temperatures with something like Speccy or Speed Fan. If parts are overheating it will make the system slow down.

If everything is normal there then I'd look into the GPU usage while you play those games with GPU-Z or MSI Afterburner. If your GPU isn't maxing out, then the games are probably waiting on the CPU, but like others said, that CPU ought to be fine for those games.

Make sure you've got at least 20% free space on your hard drive too. If it gets too full Windows can't do certain maintenance tasks that speed things up.

Your DDR3 looks a bit slow. What with the mobo support? And do you have enough psu to support overclocking anything? [read reviews of the various components to see what added power is required for overclocking]

Your hardware should be more than enough. It could be HD is full reducing your page file. Most likely its something running in the back ground, malware, stuff like that.

unless you mean its lagging online, in which case its likely your isp or router.

Take off all the software you do not use any more.