My RAM speed

[bono]

Hi I was just wonering if my RAM is running at the right speed because I got the Corsair 3600 mhz yet my NZXT cam says they are running at 1333 mhz. My ram is DDR4 8*2 so in total a 16gb ram.

 

[biffzinker]

Your Corsair is running at 2666 MHz. 1333*2

There’s a XMP speed profile on the sticks that you need to activate in the motherboards BIOS. It could be under DRAM timings in a overclocking section of the BIOS.

A list of your system specifications would help.

 

[bono]

oh okay what speed do you think my ram should run because I think its kind of waste having my ram run at 2600 when I paid for a 3600 you know?

 

[biffzinker]

oh okay what speed do you think my ram should run because I think its kind of waste having my ram run at 2600 when I paid for a 3600 you know?

Your Corsair is advertised as 3600 MHz but that depends on your CPU, and it’s integrated memory controller. You still have not listed the system’s components.

https://www.techpowerup.com/forums/account/specs

 

[bono]

Your Corsair is advertised as 3600 MHz but that depends your CPU, and it’s integrated memory controller. You still have not listed the system’s components.

oh shit mb the specs are this:
Motherboard: Asus ROG Strix X570-F
CPU: Ryzen 9 3900x
GPU: MSI RTX 2070 super
do you need the other components as well?

 

[robot zombie]

Worth noting, those speed specs don't always pan out - you can think of them like a factory OC, depending on board and CPU. Certain board/CPU configs seem to prefer certain DRAM under the heatsinks, pulling more out of them, while certain high quality DRAM paired up with the right controllers will well exceed the stated speeds and timings on most things. XMP is really an Intel thing - basically overclocks qualified and approved as working on Intel platforms - parameters that will automatically bump up the voltage and tighten them down for better speed and latency without losing stability. It's only with recent Ryzen gens that AMD hardware really started to translate well. Stability can still be a little finnicky with overclocking, but it can now do much better speeds and timings. Well enough to finally run most RAM as advertised.

Kind of confusing and misleading. I've never liked how they advertise those specs. The actual speed they will run at when you just drop them in is much lower and sometimes even if you know what you're doing, you're lucky to get all of the performance they're stating. They present it like that's the stock performance when it's not relevant to any real specs and is more like what they *think* it'll run at on most compatible machines. Most DDR4 is 2133-2666mhz these days, even if there's a higher number on the box, What it does at the stock 1.2v is the real voltage spec - that is the DDR4 standard, not what it does at 1.35v or 1.5v. Stuff that does even 3200mhz at 1.2 tends to be the absolute cream of the crop. Those kits can overclock to crazy levels like 4800mhz with pretty tight timings, and you'll see them sold that way, not as 3200mhz RAM.

The particulars are sort of irrelevant at the moment. The point is that you should hope to get that performance out of the right setup, but it's never guaranteed. It's a "generally attainable potential" figure. Marks what they CAN do under reasonably optimal conditions. Sometimes with time you can make them do more. Other times you'll never quite get that speed no matter what. Just setting expectations. It basically lets you know how good the IC and DRAM on the sticks is. The higher the speed and lower the timings they boast, the higher quality it is. You sort of buy it for that instead of for the exact number. Again, it is nonsense but that's how it goes.

Now, that CPU and mobo should be able to do 3600mhz, and in fact that is right where you want it. That's how I have my 3900x system configured, this RAM is rated for 3600mhz and will run that profile. I was even able to then lower the latency further. And that kit is 2133mhz stock even though it says 3600mhz on the box.. You didn't mention the model or timings, so I'm not sure what tier that kit really is, but 3600mhz is at least a good start. It really ought to run how it says without major issues.

There is a timing profile for 3600mhz stored on the RAM itself, meant to tell the bios how to run them. Somewhere in your overclock settings you will see something to enable that either says "XMP" or "D.O.C.P" which is just what AMD calls it. For Asus, it'll be under the Ai Tweaker panel in advanced mode, in one of the dropdowns. You should see something like "D.O.C.P 3600mhz 16-17-17..." It's a little different for every BIOS, but I think pretty much all of them have the ability to enable these profiles and run them correctly. But not by default, all DDR4 runs at its normal speed for 1.2v, which is always lower than it can run. That is a MUCH tighter spec, and is the default because the default needs to be guaranteed to load the bios and boot. Has to be rock-solid, unfailingly stable. Needs to also be efficient and able to work with as many systems as possible right out of the box. That is technically the actual spec - the one that kind of just has to work to sell em.

Not so for custom configs, which will simply be reverted to default if they fail to boot and are always the over-spec way to run your RAM. There no required guarantees to those settings, but DDR4 can take up to 1.5v and many manufacturers rate their sticks by how they perform with added voltage, try to work out a tailored combination that will work on compatible systems and give you more performance without messing around. All you need to do is enable that one option - don't mess with anything else. All of the necessary RAM settings to run the advertised speeds and timings will automatically be written to your bios with that profile enabled. You might even see some of the feilds previously set to auto change when you enable the profile. Watch the RAM speed dropdown, it will probably change from auto to 3600mhz.

 

[biffzinker]

Here's a guide from ASUS that walks you through enabling DOCP (AMD) in the BIOS setup.

[Motherboard]How to optimize the Memory performance by setting XMP(XMP Tweaked) or EXPO or DOCP in BIOS? | Official Support | ASUS USA

 

[TheLostSwede]

Are those LPX modules? If so, check for a Z in the part number to see if they're fully compatible with Ryzen CPUs. Otherwise XMP might not work as intended and you have to configure them manually.

 

[robot zombie]

Are those LPX modules? If so, check for a Z in the part number to see if they're fully compatible with Ryzen CPUs. Otherwise XMP might not work as intended and you have to configure them manually.

Fortunately less of a problem these days, but yeah... we haven't gone nutty sniffing out specific DRAM dies from specific manufacturers for nothing. As more time goes by and Ryzen becomes more common, that XMP spec means less. And yet it is as ubiquitous to RAM performance ratings as the name "Band-Aid" is to bandages. I'm betting a lot of people out there don't realize that the XMP specs they basically advertise as 'stock' are reliant on an extra layer of assumed compatibility... namely that it's an Intel system. And very few advertise being truly AMD-friendly. At best they say they're compatible. But that only tends to mean they'll work. Not so much that they'll work fast

As of Zen 2 it seemed to get a lot better. I've yet to see a 3600mhz XMP pair that wouldn't run XMP when paired with an x-model, at least. I've often been able to even tweak them further. I've somehow avoided those cursed models that get talked about. I know there's a few out there that just HATE AMD systems for no apparent reason.

 

[TheLostSwede]

@robot zombie I guess you didn't read my other PSA thread with regards to LPX modules? This is directly from Corsair. If you want hassle free LPX modules for Ryzen, then having a Z in the model name is key.

 

[robot zombie]

@robot zombie I guess you didn't read my other PSA thread with regards to LPX modules? This is directly from Corsair. If you want hassle free LPX modules for Ryzen, then having a Z in the model name is key.

Nope, didn't see it! But I did remember there being some specific Corsair sticks that were inexplicably bad/unusable with Ryzen. Didn't know Corsair themselves came out and acknowledged it!

 

[Jetster]

CORSAIR Vengeance LPX (AMD Ryzen Ready) 16GB (2 x 8GB) 288-Pin DDR4 3200 (PC4 25600) Desktop Memory Model CMK16GX4M2Z3200C16 - Newegg.com

Buy CORSAIR Vengeance LPX (AMD Ryzen Ready) 16GB (2 x 8GB) 288-Pin DDR4 3200 (PC4 25600) Desktop Memory Model CMK16GX4M2Z3200C16 with fast shipping and top-rated customer service. Once you know, you Newegg!

www.newegg.com

Never mind there's the Z

CORSAIR Vengeance LPX (AMD Ryzen Ready) 32GB (2 x 16GB) 288-Pin DDR4 3600 (PC4 28800) Desktop Memory Model CMK32GX4M2Z3600C18 - Newegg.com

Buy CORSAIR Vengeance LPX (AMD Ryzen Ready) 32GB (2 x 16GB) 288-Pin DDR4 3600 (PC4 28800) Desktop Memory Model CMK32GX4M2Z3600C18 with fast shipping and top-rated customer service. Once you know, you Newegg!

www.newegg.com

 

[TheLostSwede]

Nope, didn't see it! But I did remember there being some specific Corsair sticks that were inexplicably bad/unusable with Ryzen. Didn't know Corsair themselves came out and acknowledged it!

Officially, no. But I know quite a few people that work at Corsair, so I asked...
The ones with a Z in the model name are all guaranteed to work. It doesn't mean they're the only modules that work, but a mate of mine for some random B-die LPX modules and they are terrible B-dies with tRFC in the 500's...

 

[INSTG8R]

I always used. Corsair on my Intel builds but these kind of problems made me try to steer clear but I was having issues with.my build originally and was running out of reasonably priced 3600 Kits but ended up with Vengence Pro with Hynix ICs that have impressed the crap out of me bit it was definitely a nail biter the LPX have seemed to be a dice roll other Lost Swede finding the right ones to look for.

 

[Zach_01]

Hi I was just wonering if my RAM is running at the right speed because I got the Corsair 3600 mhz yet my NZXT cam says they are running at 1333 mhz. My ram is DDR4 8*2 so in total a 16gb ram.

Can you post a screenshot of ZenTimings v1.2.1? From there we all can see the configuration of memory and the specific model.
Also, post Thaiphoon Burner screen shot.

ZenTimings

ZenTimings is a simple and lightweight app for monitoring memory timings on Ryzen platform.

zentimings.protonrom.com

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