I don't have a 5400+ Black Edition, but do have a 5000+ Black edition (same thing really).
I have mine OC'd to 3.3ghz......I have no troubles at any game except Crysis (Both of them) and even then I won't say it's unplayable by any means, just not as smooth as my 9850 Black Edition rig.
Other than that it's a fine CPU for the money.
On my 5000+ Black rig i'm using an ASUS m2n32-SLI Deluxe (wi-fi) (it's just a AM2 Board not a AM2+) but it's a very nice Board
I changed my SIG rig so you can see what I am running in my 5000+ Black rig

I have mine OC'd to 3.3ghz......I have no troubles at any game except Crysis (Both of them) and even then I won't say it's unplayable by any means, just not as smooth as my 9850 Black Edition rig.
Other than that it's a fine CPU for the money.
On my 5000+ Black rig i'm using an ASUS m2n32-SLI Deluxe (wi-fi) (it's just a AM2 Board not a AM2+) but it's a very nice Board
I changed my SIG rig so you can see what I am running in my 5000+ Black rig
