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

stephenb · 25 Aug 2021 at 14:05

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 · 25 Aug 2021 at 14:52

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 · 1 Sep 2021 at 12:50

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

ChocAndGray · 13 Feb 2022 at 09:39

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 · 13 Feb 2022 at 10:22

Jay343434 said:
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 · 13 Feb 2022 at 10:26

Ross Thomson said:
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 · 18 Feb 2022 at 00:40

Jay343434 said:
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 · 18 Feb 2022 at 08:24

RSR said:
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 · 18 Feb 2022 at 09:22

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 · 18 Feb 2022 at 10:14

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

RSR · 18 Feb 2022 at 11:05

Jay343434 said:
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 · 21 Feb 2022 at 21:02

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.