What happens if I insert higher frequency RAM sticks on a lower freq. supported Mobo??

[Amartya]

Motherboard in question : Intel DH55PJ
Max supported freq: Dual channel 4gb stick in 4*2 RAM Slots @ 1333Mhz

RAM I want to buy: Corsair DDR3 4 GB(1 x 4GB) PC RAM (CMV4GX3M1A1600C11)

Link : Corsair RAM on Flipkart

 

[Scibbo]

A few issues can occur.
1. Massive performance drop (Ram will run only at 1333mhz and much higher latency).
2. Lower frequency ram may try keep up with high frequency ram, causing damage to the motherboard due to irregular voltages and heating on the ram.
3. Blue screen of death overtime.
4. Can completely short out motherboard, the higher frequency ram cpu etc. (Meaning brand new pc will be needed).

Never mix and match ram.

 

[Amartya]

errr you probably got this a bit wrong, I have 2 RAM slots. I will replace the 2 slots with 4*2 gigs of 1600Mhz RAM and the mobo supports 13333 Mhz only. So no mix and match of freq just the same freq but the higher freq is not supported. Can I go to my BIOS and under clock my RAM? Does my mobo and the RAM sticks I showed you support it?

 

[Scibbo]

It should automatically reduce the frequency and under clock.
Otherwise I believe your best option will be is to find 133mhz with the lowest CAS available to get the best performance.
I would suggest this : F3-10666CL7D-4GBXH

http://www.gskill.com/en/product/f3-10666cl7d-4gbxh

 

[Amartya]

I have another question if you would be so kind to answer!
I plan to upgrade mobo and processor to an AMD quad core something in the following months (I recently added a r9 270 X) and I game only on a single monitor at 1366*768 so would it be better to invest in the higher frequency RAM now or the lower CAS RAM from G Skill?

 

[Scibbo]

In that case hold off.
If your after AMD, go fx8350 on a Asus M5A99FX Pro rev R2.0 motherboard.
This gives you the option to add up to 32gb ram and up to 2133mhz frequency if you want.
Only look at Dual Band not quad.
1600mhz with a low cas will work well. If you want higher frequency, g skill 16gb sticks lowest cas at 2133mhz is CL11 (can be pushed to cl 9 in XMP mode).

 

[Amartya]

Thank you ever so much for the answer. And lastly, will gaming on the 2*2GB dual channel sticks be a problem for these two months? I'm a bit strapped for cash and that looks like a hefty update and might have to wait a while!
Also you suggest the FX 8350...would the 8 core be worthwhile for gaming or a higher clocked AMD 4.1 GHz FM2 A10-6800K Quad Core Processor be a better bet?
I will not be overclocking either because of noise and case constraints...