Originally Posted by NaroonGTX
I thought people were over that whole "Phenom II still is better than FX" thing. Piledriver > Thuban for some things, neck and neck with everything else. As a PCSX2 user, we've taken just about every post-A64-era AMD CPU, and APU, and overclocked the hell out of them for the purpose of the CPU benchmark. This emulator being very CPU-intensive, it generally shows you the performance you could get clock for clock. Phenom II would generally get you 1.5fps per 100 MHz. The Sandy Bridge would get you 2fps per 100 MHz. The benchmark showed that FX Piledriver generally outperformed Phenom II. Phenom II generally tops out around 4.0~4.2 GHz.
We have a Phenom II x6 1090T which was clocked at 4.2 GHz. It scored 60.94fps (the general goal of this benchmark is to get at least 60fps, which would generally ensure you could run most games without having to use speedhacks at full speed. Since the PS2 was bound to the refresh rate of your TV, fps in this sense means % of refresh rate. If you get 40fps in a game, for example, the game will be going in slow motion because it's not running at the speed it was on the original PS2.)
The closest result for the FX-6300 was a result at the stock clock of 3.5 GHz, where the FX-6300 gets 56.94 fps. The next highest is the same chip at 4.8 GHz, where it gets 70.64 fps. Here are some more:
Phenom II x6 1055T @ 3.33 Ghz OC: 48.05 fps (Turbo core off)
Phenom II x6 1055T @ 3.33 Ghz OC: 53.33 fps (Turbo core on)
FX-6300 @ 3.5 Ghz stock: 53.36 (Turbo core off)
So basically, Phenom II and Vishera are just about neck and neck with each other, with Vishera being faster clock for clock (though nothing massive). This program favors the Intel architectures, but otherwise shows how a CPU will perform very accurately. The program isn't strongly multi-threaded; under normal use, two threads are used for most of the emulation, and a third thread can optionally be used to process the VU1 unit which provides a nice boost for most games. The benchmark runs in software mode, only using two threads.
Seeing as how the Vishera can easily clock a lot higher than PII can, we usually recommend that to people who are already on an AM3+ socket, but want an upgrade from their current whatever.
However, going from a PII x6 to a Vishera... As a few have said, it's mostly a side-grade. You can get more performance out of the Vishera, but it would be up to the user if they really wanted to spend $130 for a bit more performance than they're already getting.