DDR4 Cas latency predicament

[rsantos20]

So I have a 2x8 16gb kit of corsair vengeance rgb pro running at 3600mhz CAS 18-22-22-42 1.35v. All works fine however would i be able to also use the exact same kit (2x8gb 3600mhz 1.35v...) with the cas latencies being CAS 16-19-19-36. Would I be able to overclock my current kit to match these timings or is that easier said than done? Would I even be able to have both kits running at CL17 or worst case scenario have them running both C18 if it even is possible. All answers greatly appreciated thanks.

[Jurrunio]

Unless you're on a quad channel platform, you most likely cant even hit the rating of the worse rated kit (3600 18-22-22-42). More memory and sticks per channel makes it more stressful to the CPU and more difficult to run fast.

 

Not saying it's impossible with manual tuning of most timing values, but definitely not "enable DOCP" kind of easy.

[Hairless Monkey Boy]

If the timings are different, it is not the exact same kit.

 

I would recommend buying the exact same kit instead of mixing RAM.

[rsantos20]

5 minutes ago, Jurrunio said:

Unless you're on a quad channel platform, you most likely cant even hit the rating of the worse rated kit (3600 18-22-22-42). More memory and sticks per channel makes it more stressful to the CPU and more difficult to run fast.

 

Not saying it's impossible with manual tuning of most timing values, but definitely not "enable DOCP" kind of easy.

Forgot to mention I'm using a ryzen cpu (correct me if im wrong) I dont think ryzen supports quad channel. I will definitely look into it more, Thanks

[rsantos20]

5 minutes ago, HairlessMonkeyBoy said:

If the timings are different, it is not the exact same kit.

 

I would recommend buying the exact same kit instead of mixing RAM.

A bit late for that haha, I made a stupid mistake and ordered the kit in the CL16 variation, tbf I thought only the CL18 kit existed but I have now learned the hard way. I live in Ireland and ordered from the UK and having to return the kit after the whole brexit situation is a bit of a hassle, Thanks

[Guest]

18-22-22 + 18-19-19 3600mt/s may run together better at 3200mt/s 16-18-18-36 instead.

 

But won't know till you try stuff. 

If XMP enables flies and stable, I'd be shocked honestly.

[Jurrunio]

1 hour ago, HairlessMonkeyBoy said:

If the timings are different, it is not the exact same kit.

 

I would recommend buying the exact same kit instead of mixing RAM.

1 hour ago, rsantos20 said:

A bit late for that haha, I made a stupid mistake and ordered the kit in the CL16 variation, tbf I thought only the CL18 kit existed but I have now learned the hard way. I live in Ireland and ordered from the UK and having to return the kit after the whole brexit situation is a bit of a hassle, Thanks

Buying the same kit wont do either, only way that stability can be somewhat guaranteed (which means you can RMA if it doesn't) is with a kit of double the capacity. In other words, only 1 kit at a time.

[Hairless Monkey Boy]

13 minutes ago, Jurrunio said:

only way that stability can be somewhat guaranteed (which means you can RMA if it doesn't) is with a kit of double the capacity.

With XMP, even then it's not guaranteed to work. 

1 hour ago, rsantos20 said:

A bit late for that haha, I made a stupid mistake and ordered the kit in the CL16 variation, tbf I thought only the CL18 kit existed but I have now learned the hard way. I live in Ireland and ordered from the UK and having to return the kit after the whole brexit situation is a bit of a hassle, Thanks

That said, this should all work together at the slowest combination of timings, which you may have to enter in manually. So try running it all at 3600Mhz 18-22-22-42.

 

Unfortunately there is a slew of secondary and tertiary timings that may not play nice with different kits. These timings can sometimes be set per channel, so if the above does not work, try putting matching sticks in the same channel. So like this:

 

ll ll

 

Instead of this:

 

ll ll