My BTF 4 is VERY SLOW

> Update your video card drivers to the latest version possible.
> Turn off anti aliasing and anisotropic filtering.
> Use a wired Internet connection.
> Defragment your hard drive with PCFresher.
> Overclock your CPU and graphics card.
> Shut down all programs that run in the background while playing Battlefield.

If the hardware is inadequate, that won't help, and given that the post is nearly a month old, the author is almost certainly absent now, since the Beta won't run without the Battlelog network, and the network no longer recognizes the Beta. 

Simcity 2013 Requirements

Operating Systems:
SimCity will run on Windows XP, Vista, and Windows 7.
CPU:
Intel C2D E4400, 2 GHz, or AMD X2 4000
Video Card:
Geforce 7800 GT or Radeon HD 2600 XT with 512 MB VRAM
***NOTE: each of the above-mentioned must also have Shader 3.0 or better support, and it is essential to the game’s performance and stability that the latest possible drivers for your video card are installed at all times (see my note#).
2 GBs RAM
Direct3D Dx9
Needed space on HDD 10 GB
Optical Drive:
DVD-ROM drive required.

Internet Connection:
Players will need an Internet connection of at least 256 kbps download and 64kbps upload or faster.

Here's that Note# :

The equivalent to those minimums they named for playable results today: Geforce GT 640 and Radeon HD 6570.

Since cards' names are practically meaningless without a score sheet, the Geforce 205, 210, 215, 305, 310, 315, 430, 510, 515, 520, 610, 615, and 620 are all below the Geforce 640.  The GT 630 is a fence-sitter, not recommended (to be fully complete, all of the Geforce 6n00s, any 7600 - downward, 8500 -downward, 9400-downward, are below minimum).  The Radeon X1550, HD 2400, HD 3450, HD 3470, HD 4350, HD 4550, and HD 5450 are all below the 6570.  The HD 6450 may be a fence sitter, however, I don't believe it is actually quite that good.  The HP card that Hewlett Packard sells as an HD "7450" is just a 6450 all over again.