Some CPU Questions, and do I need to upgrade

[wakasm]

I've been playing WoD just fine with my 5 boxing team. I've had my computer for about 4 years now (I think). The only upgrades I've made over the years were the graphics card, ram, and SSD.

I can usually play at 30-60 FPS on my main on Max settings, and slaves on lowest settings set to 15FPS and lately, I've been having issues that I believe are CPU related, where one of my toon windows will start to drop closer and closer to 0 fps and freeze, and I've noticed when I use Open Hardware Monitor, one of my CPU cores will be reaching 100%.

Generally, the specific CPU Core is random, it's not always #1, #2, #3, or #4.

I've messed with a bunch of the ISBOXER settings for cpu, tried most of the different settings but it eventually happens.

Usually an in-game ui reload fixes it for a while, but within an hour, one of the wow windows will start freezing up. I have to catch the slowness and do a /reloadui before the FPS gets too low.

And just to include more info, my temps usually flux between 48C to max 58C.

My GPU always seems to not go very high. The load is always very low, like 20%.

Anyway, I don't know if I am need of a new machine completely... or just an upgrade to this machine. I did build this machine, but I am not the best at knowing what's best when it comes to hardware. I am open to either. I was hoping to attempt 10 boxing this year, so I doubt I can do so on this machine anyway, but possibly could do 5 on this machine in the future if I figure this out. I've never upgraded just a CPU before, so not sure if that's an idea or not.

These are the specs:

Asus P6T SE
Intel Core i7 920 (2.67GHz)
AMD Radeon HD 6900 Series
SanDisk SSD 256GB
12 GB Ram

If I need a new machine completely... does anyone have a parts picker list for something that could feasibly do 10 toons for PVE?

Thanks!

wakasm