RAM upgrade, vprašanje glede frekvenc itd.

The divider for AM2 is calculated like this: CPU multiplier x 0.5 x RAM ratio (this is 1 for DDR2 @800, 1.2 for DDR2 @ 667, 1.5 for DDR2 @ 533 and 2 for DDR2@400)

Let's calculate for this 5050e and PC2-6400 (DDR2 800):
divider 13 x 0.5 x 1.0 = (6.50) 7 (which must be ROUNDED to next high int).
Memory will be running at CPU multiplier x FSB x 2 (because it's DDR2) / divider, so we have: 13 x 400 / 7 = 743 magic number.
To have memory running @ 800 we need to overclock a bit, so we calculate necessary CPU speed: 800 * 7 / 2 = 2800MHz. So that is 2800 / 13 (CPU multiplier) = 215.4
Now go to your BIOS, locate your overclock section, set FSB to 215 or 216 (from default 200) and punch it. Check out now with CPU-Z now, no surprise, it says DDR2 @ 800 (799 to be more precise).

I hope it's not (very) confusing, but in CONCLUSION: overclock your 5050e (or 4850e) to 2800MHz (or more) to have your DDR2 running @ 800 (or more).