Did Corsair just silently put out the best B Die bin on the market? 4000 16-16-16-36 XMP at 1.40v!

[stephenb]

The values suggested by Ryzen DRAM calculator are just that, suggestions. There is no guarantee that your CPU/Motherboard/RAM combo will be able to run them. 3800@CL15 is very fast already.

 

[Vraz]

Of course, but How to check which parameter causing a problem?
my spec:
CPU 5800X, MB Gigabyte X570 Ultra, and RAM from this thread

Zen timings : https://imgur.com/hpnqFYW

 

[Too Tall]

I was very tempted by these but ended up ordering a set of F4-4000C16D-16GTZNA. CL16-16-16-36 1.40V.

 

[ChocAndGray]

Sorry to bump an old thread but I bought this ram and can't even run it at xmp which is annoying.

This is on a dark hero motherboard.

For anyone that does have this ram, have you managed to run it at XMP or DOCP rather on amd.

Or are you running lower frequencies with tighter timings?

 

[Ross Thomson]

Sorry to bump an old thread but I bought this ram and can't even run it at xmp which is annoying.

This is on a dark hero motherboard.

For anyone that does have this ram, have you managed to run it at XMP or DOCP rather on amd.

Or are you running lower frequencies with tighter timings?

what chip and frequency? very unlikely you will be able to run it at 4000mhz unless you change to 2:1 infinity ratio.

I run it at 3600 cl14 with a 3900x

 

[ChocAndGray]

what chip and frequency? very unlikely you will be able to run it at 4000mhz unless you change to 2:1 infinity ratio.

I run it at 3600 cl14 with a 3900x

I have a 5950x. I can't even boot with a 2000Mhz infinity clock, but I've tried running the ram at 400Mhz and the infinity slower but no dice.

I'm currently running at 16-16-16-36 at 3800Mhz, but not sure if I'd get better performance running at say 3733 at tighter timings 14-14-14- etc

 

[RSR]

Sorry to bump an old thread but I bought this ram and can't even run it at xmp which is annoying.

This is on a dark hero motherboard.

For anyone that does have this ram, have you managed to run it at XMP or DOCP rather on amd.

Or are you running lower frequencies with tighter timings?

I've got it turned down at the moment but 1900 FLCK should be fine, I do have a profile for 2000 FLCK profile as well.

 

[ChocAndGray]

I've got it turned down at the moment but 1900 FLCK should be fine, I do have a profile for 2000 FLCK profile as well.

What voltage do you run at?

Also have you adjusted any secondary timings?

I would be interested in seeing your full settings?

 

[RSR]

Its running at 1.502v from memory and yes, all secondaries have been set.

There is no point sharing them as what works on one setup may not work on the other setup.

 

[ChocAndGray]

Did you use the ram calculator (can’t think of the name) or set them up yourself?

 

[RSR]

Did you use the ram calculator (can’t think of the name) or set them up yourself?

I don't use any of those calculators, as they don't take into account the varances between components. So mine are all manually set and tested, which I use RAM Test / TM5 and Y-Cruncher to confirm its stable.

 

[Audioboxer]

Running memory on Ryzen out of sync is simply not worth it unless it's for benchmarking when bandwidth is king.

I've managed to get my 4000C14 kit to boot up to 4533C16 stable and my memory latency was still worse than what it is at 3800C13. Fairly close but still a few ns off. Bandwidth was amazing, but as I said unless you need the bandwidth for something it's better to prioritize latency.

Sadly it does not look like AMD will get AM4 chips safely to 2000. Very few can manage it fully stable.





Whereas on my daily I get around 54ns



Around 54ns pretty much being where most people will sit with a 5950x.