Question CORSAIR Vengeance RGB RT DDR4 3600 C16 OC Question

[Niteowl0171]

I'm thinking of getting these CORSAIR Vengeance RGB RT 32GB (2x16GB) DDR4 3600 (PC4-28800) C16 snd have read a couple of reviews that they were able to overclock these to 4000MHz with 18-17-17-38 times but never mentioned voltage so my question is would I need to adjust the voltage if so what would be a good voltage setting also would I need XMP on or off? If it helps I have a i7 12700k and a MSI Z690 Pro-A mobo.

 

[Aeacus]

snd have read a couple of reviews that they were able to overclock these to 4000MHz with 18-17-17-38 times

Why would you want to OC already OC'd RAM and make it slower? 🤔

Your RAM SPD speed is 3200 MT/s with CL22 at 1.2V.
Your RAM has XMP (OC profile) with 3600 MT/s with CL16 at 1.35V.
But OC'ing already OC'd RAM, to 4000 MT/s with CL18 at 1.35V-1.5V will make the RAM slower.
So, why bother in the first place?

Also, higher transfer speed isn't always the best, especially when you have high CAS Latency to go along with it. To know which transfer speed and CAS Latency combos are most beneficial, lets put the transfer speed and latency into nanoseconds, with a formula of:

(cas latency/ram transfer speed) x 2000 = latency in nanoseconds

Whereby;
SPD speed: (22/3200) x 2000 = 13.75 nanoseconds
XMP speed: (16/3600) x 2000 = 8.8 nanoseconds
OC of OC speed: (18/4000) x 2000 = 9 nanoseconds

So, why spend time and effort, fiddling with timings and voltage, to increase transfer rate but overall also increasing latency (making RAM slower)? 🤔

Btw, XMP = automatic overclock profile. If you enable XMP, your RAM IS running in overclocked state.

For DDR4, 3000 MT/s is the sweet spot. At most, 3200 MT/s. Anything above that, is waste of money, time and effort.

View: https://www.youtube.com/watch?v=D_Yt4vSZKVk

 

[Niteowl0171]

Why would you want to OC already OC'd RAM and make it slower? 🤔

Your RAM SPD speed is 3200 MT/s with CL22 at 1.2V.
Your RAM has XMP (OC profile) with 3600 MT/s with CL16 at 1.35V.
But OC'ing already OC'd RAM, to 4000 MT/s with CL18 at 1.35V-1.5V will make the RAM slower.
So, why bother in the first place?

Also, higher transfer speed isn't always the best, especially when you have high CAS Latency to go along with it. To know which transfer speed and CAS Latency combos are most beneficial, lets put the transfer speed and latency into nanoseconds, with a formula of:

(cas latency/ram transfer speed) x 2000 = latency in nanoseconds

Whereby;
SPD speed: (22/3200) x 2000 = 13.75 nanoseconds
XMP speed: (16/3600) x 2000 = 8.8 nanoseconds
OC of OC speed: (18/3600) x 2000 = 9 nanoseconds

So, why spend time and effort, fiddling with timings and voltage, to increase transfer rate but overall also increasing latency (making RAM slower)? 🤔

Btw, XMP = automatic overclock profile. If you enable XMP, your RAM IS running in overclocked state.

For DDR4, 3000 MT/s is the sweet spot. At most, 3200 MT/s. Anything above that, is waste of money, time and effort.

View: https://www.youtube.com/watch?v=D_Yt4vSZKVk

More out of curiosity I never have really manually OC'd RAM and is something I've always wanted to tinker with it I can OC a CPU in my sleep so just wanted to like I said tinker with the idea can't learn if you don't try and like why make a mobo that can handle RAM upto 5133 MHz OC'd if it would make a system slower? but you gave great info something I didn't really realize.

 

[Aeacus]

More out of curiosity I never have really manually OC'd RAM and is something I've always wanted to tinker with it

Just because similar RAM with given timings is stable, doesn't mean that yours is.

But if you want to tinker, then this short video tells you how to manually OC the RAM;

View: https://www.youtube.com/watch?v=Yed-a9vqTYc


For the most part, with RAM OC, idea is to get the lowest latency in nanoseconds and not the highest transfer rate.

and like why make a mobo that can handle RAM upto 5133 MHz OC'd if it would make a system slower?

Marketing.

For example, street legal cars have the top speed presented boldly, e.g 200 km/h, 250 km/h, 300 km/h, 330 km/h etc, but why make cars to go that fast, when speed limit is 90 km/h or 120 km/h? Since you'd never be able to drive that fast regardless.
(Similar is with car engine RPM, most cars keep the RPM below 3000 (gasoline engine) when driving daily, so, it's pointless to make engine that can go 7000-9000 RPM.)

But bigger number usually indicates that "it has to be better" and people want to get bigger number item. Be it RAM transfer speed, car top speed or max engine RPM. Despite never using the hardware at it's fullest capacity.


As for RAM, look your MoBo memory QVL and see if there is actually any RAM that can operate at 5133 MT/s.
Link: https://www.msi.com/Motherboard/PRO-Z690-A-DDR4/support#mem

I gave it a look and there is just 1! RAM set, from Kingston, that your MoBo can run at 5133 MT/s.
Well, at least this is the one that MSI tested and was able to get working at 5133 MT/s. (Having a guarantee.)

I couldn't find what that specific RAM set costs since it's Unavailable at current date. Not even when looking back up to 2 years. But given that normal DDR4 usually caps out ~3200 MT/s, that 5133 MT/s set could've easily cost 1000 bucks, if not more.

E.g similar DDR4 kit (2x 8GB) at 5100 MT/s costs 1000 bucks,
pcpp: https://pcpartpicker.com/product/DL...-x-8-gb-ddr4-5100-cl19-memory-blm2k8g51c19u4b

While the same capacity (2x 8GB) at 3200 MT/s costs 26 bucks,
pcpp: https://pcpartpicker.com/product/P4...8-gb-ddr4-3200-cl16-memory-sp016gxlzu320bdaj5

That's price difference of 38.4 times! It is insane how much the 5100+ MT/s DDR4 RAM costs.

 

[Niteowl0171]

Just because similar RAM with given timings is stable, doesn't mean that yours is.

But if you want to tinker, then this short video tells you how to manually OC the RAM;

View: https://www.youtube.com/watch?v=Yed-a9vqTYc


For the most part, with RAM OC, idea is to get the lowest latency in nanoseconds and not the highest transfer rate.


Marketing.

For example, street legal cars have the top speed presented boldly, e.g 200 km/h, 250 km/h, 300 km/h, 330 km/h etc, but why make cars to go that fast, when speed limit is 90 km/h or 120 km/h? Since you'd never be able to drive that fast regardless.
(Similar is with car engine RPM, most cars keep the RPM below 3000 (gasoline engine) when driving daily, so, it's pointless to make engine that can go 7000-9000 RPM.)

But bigger number usually indicates that "it has to be better" and people want to get bigger number item. Be it RAM transfer speed, car top speed or max engine RPM. Despite never using the hardware at it's fullest capacity.


As for RAM, look your MoBo memory QVL and see if there is actually any RAM that can operate at 5133 MT/s.
Link: https://www.msi.com/Motherboard/PRO-Z690-A-DDR4/support#mem

I gave it a look and there is just 1! RAM set, from Kingston, that your MoBo can run at 5133 MT/s.
Well, at least this is the one that MSI tested and was able to get working at 5133 MT/s. (Having a guarantee.)

I couldn't find what that specific RAM set costs since it's Unavailable at current date. Not even when looking back up to 2 years. But given that normal DDR4 usually caps out ~3200 MT/s, that 5133 MT/s set could've easily cost 1000 bucks, if not more.

E.g similar DDR4 kit (2x 8GB) at 5100 MT/s costs 1000 bucks,
pcpp: https://pcpartpicker.com/product/DL...-x-8-gb-ddr4-5100-cl19-memory-blm2k8g51c19u4b

While the same capacity (2x 8GB) at 3200 MT/s costs 26 bucks,
pcpp: https://pcpartpicker.com/product/P4...8-gb-ddr4-3200-cl16-memory-sp016gxlzu320bdaj5

That's price difference of 38.4 times! It is insane how much the 5100+ MT/s DDR4 RAM costs.

 

[Niteowl0171]

Ok thanks for your time and info!