Making upgrades to PC

[Iceshadoe]

Im making upgrades to my pc was looking for some input.
I've put in a new grapics card. It's a http://www.newegg.com/Product/Product.aspx?Item=N82E16814121363
I've also upgraded the power supply to http://www.newegg.com/Product/Product.aspx?Item=N82E16817153023
I'm looking to play elder scrolls online at the max settings if possible. What do I need to change/upgrade to make this possible. I've got about $300 to spend. Here are my specs, any input and help is much appreciated, Thanks in advance!

A Glance
Support for AMD Phenom™ II X2/X3/X4 multi-core processors and AMD Athlon™ II X2/X3/X4 multi-core processors
Genuine Windows 7 versions, Genuine Windows Vista versions, Genuine Windows XP Professional available through downgrade
rights from Windows 7 Professional, SuSE Linux Enterprise Desktop 11, or FreeDOS
NVIDIA GeForce 9100 Chipset
Legacy serial port support
NVIDIA GeForce 9100 graphics controller with DX10 support
PCI Express I/O bus
Serial ATA controller
Realtek 8111DL Gigabit Ethernet Controller
Choice of hard drives and optical drives
DDR3 SDRAM system memory
Protected by HP Services. Terms and conditions vary by country. Certain restrictions and exclusions apply

 

[Turb0Yoda]

Protected by HP Services.
Can't change anything else without wiping the HDD and putting a new installation of Windows. Most OEMS lock machines so that they will only function with the factory parts. They MAY have some processor upgrades available, look at the page.

 

[IDontUnderstand]

Most OEM Windows are only tied to the motherboard and nothing else.

I'm assuming your motherboard using AM3, it really depends on exactly what CPU you have, you can find out about it in Device Manager.
I would get GTX 750 Ti for the GPU http://www.ncixus.com/products/?usaffiliateid=1000031504&sku=94331&vpn=02G-P4-3751-KR&manufacture=eVGA
CPU would depend on your current one. In addition, we would need a picture of the back of your case to check whether the GPU will be compatible or not.

 

[Turb0Yoda]

Most OEM Windows are only tied to the motherboard and nothing else.

I'm assuming your motherboard using AM3, it really depends on exactly what CPU you have, you can find out about it in Device Manager.
I would get GTX 750 Ti for the GPU http://www.ncixus.com/products/?usaffiliateid=1000031504&sku=94331&vpn=02G-P4-3751-KR&manufacture=eVGA
CPU would depend on your current one. In addition, we would need a picture of the back of your case to check whether the GPU will be compatible or not.

And the model number. I assume you have it since you used the official HP website.