Xants :
I'm new to this. I'm building a new one for gaming and photo editing right now. I have Mobo Asrock Z77 Extreme4 and CPU i5 3570k. What GPU should i get? a single high quality one or 2 mid range for SLI?
budget is about $300-$400.
Thanks,
Your budget for a graphics card is appropriate with a 3570K.
My rule of thumb for a gamer is 2x the cpu cost for the graphics card. You are good there.
Some photo editing apps can use the CUDA capabilities of a Nvidia card, so I would favor NVIDIA.
Perhaps a GTX670.
sli of lesser cards may look good in synthetic benchmarks, but be prone to annoying microstuttering.
Read about it here:
http://www.tomshardware.com/reviews/radeon-geforce-stutter-crossfire,2995.html
And, some games do not play well with dual cards.
Add in higher psu, motherboard, and cooling costs, and I would stick with a good single card when there is one that will do the job.