question mga sir kapag ganito ang setup ryzen 3600 at rx 5700xt ano magandang ram speed ang ipares yung board ay b450?
Suggestion ko go for DDR4-3200 CL16 memory kit with good Ryzen compatibility. Ideally mas maganda kung nasa QVL ng motherboard mo yung memory kit para may extra assurance ka na walang compatibility issues. Performance wise almost the same narin ang DDR4-3200 CL16 and DDR4-3600 CL18 in games and DDR4-3200 tends to be cheaper sa atin.
Usually hindi worth it to spend more on expensive memory especially if may risk na hindi siya maging stable at the memory kit's rated speed (DDR4-3600 for example). Pwede ka naman bumili ng DDR4-3600 memory kit and hope na stable siya at DDR4-3600 speed with your CPU + B450 motherboard combination, but hindi siya guaranteed. If you want more performance na hassle-free, spend more on the CPU like Ryzen 5 3600X or Ryzen 5 3700X which has higher boost clocks.
and i heard 5700xt minimum power supply needed is 600w anong power supply ba ang 650w na hindi masakit sa bulsa?
Just check the videocard manufacturer's website on the minimum and recommend power supply wattage for their RX 5700 XT videocard. Usually the minimum PSU wattage they mention is 600W and the recommended is 650W (for Sapphire). Others like Gigabyte recommend 600W for their RX 5700 XT models while PowerColor recommends 650W ~ 700W minimun for their Red Dragon and their Red Devil cards respectively.
Suggestion ko is go for an RX 5700 XT na mababa ang PSU requirements (Sapphire Pulse or Gigabyte) since you will not be overclocking anyway. Then buy a Seasonic S12III 650W PSU for Php 3,250 or step up to Seasonic Focus GM-650 for Php 4,500. If you plan to go for a heavily overclocked RX 5700 XT, a good option is FSP Raider II 750W for Php 3,500. That PSU should be able to handle high power cards like the PowerColor RX 5700 XT Red Devil.