RAM questions and help!

[Allunia]

I have an 8700k on gigabyte z370 aorus gaming 7
And a 2080 ti with it. 
My ram is some old 3000 cl17 kit that can't really OC much. 

I plan to buy some new ones like the viper or gskill. 

so :
1) If i get some of those really high freq(4400) and my mobo+cpu can't get there can i downclock them to a lower frequency like 4000 and reduce the timings to still benefit? 

2) should i buy those really high freq and low CAS ones?  or they are not worthy? (money is not an issue) 

3) Is  the voltage those kits specify 1.45 some even safe for long usage? 

4) even if xmp doesn't work can i still manually tweak them to a dream setting? 

5) Will higher speed benefit me mostly on gaming?  ( i play on 1440p, 144hz and usually single player games especially more action oriented ) 

6)  will i have any real compatibility issues aside the xmp profile not working? 

Any other advice on what kit to choose? 

PVS416G440C9K is one that is suggested on sites....  is it good? 

thx in advance.

note: cpu is OC to 5ghz

[Code.016]

46 minutes ago, Allunia said:

I have an 8700k on gigabyte z370 aorus gaming 7
And a 2080 ti with it. 
My ram is some old 3000 cl17 kit that can't really OC much. 

I plan to buy some new ones like the viper or gskill. 

so :
1) If i get some of those really high freq(4400) and my mobo+cpu can't get there can i downclock them to a lower frequency like 4000 and reduce the timings to still benefit? 

2) should i buy those really high freq and low CAS ones?  or they are not worthy? (money is not an issue) 

3) Is  the voltage those kits specify 1.45 some even safe for long usage? 

4) even if xmp doesn't work can i still manually tweak them to a dream setting? 

5) Will higher speed benefit me mostly on gaming?  ( i play on 1440p, 144hz and usually single player games especially more action oriented ) 

6)  will i have any real compatibility issues aside the xmp profile not working? 

Any other advice on what kit to choose? 

PVS416G440C9K is one that is suggested on sites....  is it good? 

thx in advance.

note: cpu is OC to 5ghz

1. You should still be able to run high freq RAM as long as it is supported by your mobo. XMP will do that for you.

2. As long as your mobo supports that kit (2x4 or 4x4), the go with high freq and low cas.

3. Yes

4. Yes

5. A big YES

6. Check your mobo's RAM compatibilty sheet before buying RAM. Most RAMs can run on every mobo, but you should still rely on your mobo's compatibilty sheet.

Bonus: If you have a lot of cash to burn, look for 4x4 16GB Kit and call it a day. Google Chrome will love you for that.