Gaming PC Upgrade Advice

[Daichin]

Hi Everyone,
My current PC is recently not doing as well as I would like on various games. I'm not 100% sure what the current bottlenecks are/what I should upgrade.

My Specs are:
NZXT M59
Athlon II X4 620 @ Stock 2.6ghz
DFI Lan Party 790FXB-M2RSH AM2+
4GB G.Skill DDR2 2400 @ 800mhz
2 x Sapphire Ati Radeon HD 5750
Western Digital 500gb + WD 320gb
WinPower 700w PSU
19" ViewSonic VA1916W (1440 x 900)

As I mentioned, I'm not sure what the bottlenecks are, but I'm assuming it's the processor.
My budget is roughly £350.

What I have come up with thus far:

i5 2500k - £167.98
Asus P8P67 Rev 3.0 - £106.40
4GB Corsair Vengeance 1600mhz - £25.68
650W PSU, OCZ Technology ZS Series ZS650W - £61.98
Total: £371.63

Or...

Phenom II X4 955BE - £89.86
650W PSU, OCZ Technology ZS Series ZS650W - £61.98
2GB XFX 6950 - £212
Total: £374.66

Suggestions and advice would be very welcome. I'm assuming I'd get much better performance out of the second one, but I'm concerned about how future proof it would be.

Thanks in advance.

 

[rolli59]

Well 2 x HD5750 in crossfire would not be far behind the HD6950 in performance. It is pretty much up to you how to proceed but overclocking the current X4 would be the first step.

 

[Daichin]

Thanks. I thought there would be a significant difference between the 6950 but I couldn't find any benchmarks.

I've looked into overclocking, but I don't know very much about it. I'd be willing to learn, but I don't really know where to start.

Finally, would the 955 bottleneck the 5750s? They seem to go to about 60-70% usage with the 620, but in some games (usually the ones I want to play) they only go to about 30%.

 

[rolli59]

No 955 would not. couple of HD5750 would be somewhere in between HD5850 and HD6950 in performance.
There is plenty of overclocking guides out there if you google inclusive in our OC section.