I have a five year old Dell XPS 630 that came with two GeForce 9800 GTs. It's a mid-range gaming rig that's really starting to show its age and instead of completely upgrading to a new PC for $1000, I figured for now just getting a GTX 750 Ti would be a better option to get mid-high range settings for only $150. Was I crazy to expect that? All the reviews I've been seeing have said that some older mid-range PCs are able to even see an 800% increase in performance and outperform an Xbox One with games like Titanfall on 1920x1080 resolution.
 
Unfortunately, while the card is without question an improvement, I'm only seeing about a 250% increase in performance from using just ONE 9800 GT (without SLI). Obviously my five year old rig is holding the card back... but is there any way I can boost this card even more? I'm not even able to hold a solid 30 FPS when things get crazy in Planetside 2 on low/medium settings, which is a bit disappointing for just dropping close to $200 (once tax/shipping was factored in).
 
Running the Heaven Benchmark v2.1 tool, my Min FPS actually even dropped... which is odd.
 
Can anybody suggest ways that I could clock this card better using a tool like EVGA Precision X (I've never used it before), or another program that I could run that could try and diagnosis any issues or weak points with my PC that I could correct? My system's specs are below and I've attached the before and after results of running Heaven's benchmarking tool:
 
Intel Core Quad Q8200 @ 2.33 GHz
6 GB of RAM
750 watt power supply (so I got plenty to burn)
Windows 7 64-bit OS
EVGA 02G-P4-3757-KR GeForce GTX 750 Ti 2GB 128-Bit GDDR5 PCI Express 3.0 FTW w/ ACX Cooling Video Card
 

New rig time!

FattysGoneWild
New rig time!

I really don't want to purchase everything brand new at the moment, which is why I was excited to hear such great things about this card on older systems. :(
 
Since my processor sucks, what are my options in terms of overclocking the card? Would pushing the card to its limit produce some slightly better results? Since I'm stuck with the brand new card and a dated PC, I might as well push it to try and get the most out of it before trying to upgrade everything. No point in trying to put a GTX 750 Ti into brand new rig if I'm trying to achieve High-Ultra settings, right?

IntoxicatedPuma
I think your computer is being limited by the CPU not the video card.  It doesn't look like the CPU can overclock very well either from what I've read online about the q8200.  Possibly upgrade to a Q9550 which would give you some performance gains - but it looks like it's around $100 on ebay for one.  At that price you could buy a new FM2+ motherboard and an AMD 750k which would have a bit more performance and alot more room for future upgrades.  It'd cost you about $80 for the CPU and $50-60 for a decent motherboard.

Thanks for the detailed recommendations Puma. Like you and others have said, seems like my only option if I want to see run this card in this case is to look for a cheap new CPU and mobo.

I agree with everyone here. Your 5 year old motherboard and CPU just aren't going to cut it.
 
Here are the specs of your system:
 
http://reviews.cnet.com/desktops/dell-xps-630/4507-3118_7-32865535.html
 
So you've got an old NVIDIA nforce 650i motherboard in it. Ideally you could purchase another motherboard and CPU but Dell more often than not uses proprietary parts in their rigs so your PSU may not work unless you bought it yourself. Hopefull Dell used a standard ATX PSU and if so then you should be OK.

You have a dangerous situation now. I always feel it is better to have a GPU bottleneck rather than a CPU or RAM bottleneck. You have a CPU bottleneck here. Your CPU is  cannot do the things your GPU can do.

Ok, since my PC sucks, what if I go with purchasing a brand new one and putting the 750 in it? I was thinking this from ibuypower sans the card that comes with it ibuypower[dot]com/Store/Intel-B85-Core-i5-Configurator/W/209725would be a solid build for now and could easily be updated with a new card and ram in the future.