Graphics card motherboard compatibility issues

[jonloe]

heres the deal. im on a tight budget. so for christmas, im trying to get my parents to get me a new graphics card. i love COD4, and am hoping to love COD:mw2, as soon as i can get my hands on it. my only problem is that my current rig can only handle it on close to the lowest settings.
what i have now,

Pentium D 3.2ghz
2Gb corsair ram
Rio 3 motherboard
Asus X550 512mb graphics card
250 GB seagate HDD
all wrapped up in windows XP

what im hoping to get from my parents is this

http://www.newegg.com/Product/ComboDealDetails.aspx?ItemList=Combo.292676
its a XFX HD 4670 and a corsair 400 watt power supply ( i have a puny 250 watt ATM)


after getting all my hopes up for this, i discover that my MOBO is a PCI-e 1.0a, and the Graphics card i want to get is a 2.0. after putting many an hour into trying to figure out if it was compatible or not, i came to the conclusion that everyone online likes to confuse me. half of the things i read said that 2.0 is only backwards compatible with 1.1, while the other half say its fully backwards compatible with 1.0a.

so my question to you would be:
A. is the graphics card in question backwards compatible with a 1.0a PCI-e slot
B. if so, will the HD 4670 handle COD4 and COD:mw2 and make them look sexy? ( yes i know their the same engine)
C. if not, what are some good PCI-e 1.0a cards that could handle these two games?


thanks for all of your help and advice before hand,
Jon Loe

 

[jay2tall]

A. Yes, 2.0 is compatible with 1.1/1.0
B. a 4670 will run COD4 at 1680x1050 at high detail with no AA or AF
C. What is your budget. I'd say a 5750 or 5770 would be a good choice. What resolution are you gaming at?

 

[jonloe]

thanks for the reply!

im not one to be picky about resolution. if its above 1024x768 ill be happy
budget would be my biggest weakness. i am the definition of super broke. i was looking at a 4770, but that was before i found out that i need a new power source too. thats the main reason im looking at the 4670, because i found a deal that will give me that and a corsair 400 watt for 89 bucks. that would be about the top of my limit. i doubt i can get anything over 100.

And im sorry, i dont mean to second guess you, but are you sure about the 2.0 being compatible with 1.0a? i also shot off an email to the makers of my MOBO, and the email i got back said,

Hello, Thank you for contacting Packard Bell.

Regarding your enquiry,

The PCIe slot is 1.0a compliant. It will not accept a PCIe 2.0

Regards

Steve
Packard Bell UK Customer Services Team

this is agian confusing me. i would just say screw it, ill order it, and if it doesnt work ship that puppy back, but i live overseas, so whatever i order im going to have my brother bring back when he comes to visit for the holidays. thanks again for the advice.