Problem with MOTHERBOARD,MEMORY

Hello, Im finally Gonna build my budget pc but i have a little problem in motherboard and memory that im gonna buy. it's confusing me

Here is my specs :

i have 2 choices for the processor and memory :

Intel i3-2120 (3.3Ghz, 3MB Cache ) Sandy Bridge and Intel i3-3220 (3.3Ghz, 3MB Cache ) Ivy Bridge

ECS H61H2-M12 Motherboard DDR3/PCIE

1GB SAPPHIRE ATI Radeon 7770 DDR5 128bit

Corsair XMS3 8GB (4Gx2) DDR3 1333 CL9 and Corsair Vengeance 8GB (2x4GB) DDR3 1600 CL9



ecs website : http://www.ecs.com.tw/ECSWebSite/Product/Product_Detail...

ecs website the mobo specification tab it says . "Supports DDR3 1066/1333/1600(with Ivy Bridge)SDRAM" .

what if i have a Ivy Bridge processor like i3 3320 then i can run a 1600 memory or it will downgrade to 1333??

Thanks in advance.