just to clarify i don't really know much about computers and i was on a budget...
 
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im currently using windows 7 home premium
my computer : dell inspiron 560
cpu : intel core 2 quad Q9400
psu : evga 500w 
ram : pny 2 x 4gb to get total of 8gb
 
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and the gpu i wanna instal is gtx 950 axc 2.0 ssc. (im aware it would bottle neck cause of cpu i just wanted something that'd last and be good until i had funds to get a better motherboard and cpu..) 
 
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anyways i put the graphics card in and connected 8pin and turned it on and got nothing to show up on screen it was just black. to be fair i don't have a div or hdmi to my monitor that was connected to the card not sure if that is the problem or not... so i had an hdmi cord around and a tv so i connected it to the tv and it wasn't receiving a signal was just blue screen.
 
so i looked up online for what i should do, this video was like i should disable my on board graphics in device manager then shut down put the card in then trun it on.    so i did that i disabled (intel(r) g45/g43 express chipset) in device manager under the display drivers.. shut it down put card back in still black screen.
 
so i searched again for a fix came across a video telling me to search under start menu 'msconfig' then click boot and safe boot and check minimal apply then shut down. so i did this and put card back in still black screen.
 
im not sure what im suposed to do any and all help would be greatly appreciated thank you

arestavo
Your computer likely doesn't support UEFI, which the 700, 900, and now 10 series requires. There were some special 600 series cards that would work on legacy BIOS motherboards, but they were very few and far between.
 
You can try to update your BIOS to A06 to see if that helps, but it is likely that you just need to return the 950 and buy a used 500 series card. http://www.dell.com/support/home/us/en/04/Drivers/DriversDetails?driverId=GMYFW&fileId=2731098888&osCode=W764&productCode=inspiron-560&languageCode=en&categoryId=BI 
 
Should you want confirmation of this, contact EVGA's tech support: http://www.evga.com/about/contactus/ 
 
If you don't have the card registered, register it here first to get expedited support: https://www.evga.com/support/register.asp 

Thank you for the great info! Based on previous experience if a Dell system is compatible the BIOS version is usually A08 and up, they also usually also say something in the terms up "Updated UEFI support" in the patch notes. So it would be very unlikely that this board would be compatible. If you need assistance confirming compatibility for your current or future build please do not hesitate to give us a call at +1.888.881.EVGA (3842). 

MiceRace
the bios/uefi is all on the motherboard correct? could i replace the motherboard with another lga 775 mother board that supports uefi?

Yes that is correct. You can definitely just replace your motherboard with a UEFI compatible unit. 

would something like this work? ASUS P5G41T-M LX Motherboard Intel G41 LGA 775 DDR3
 

alright thank you. if you've any idea of a good lga 775 board that could support it lemme know. seen alot of these boards had ddr2 which i don't have that kinda ram but i do have ddr3 ram lol