GSkill DDR5 6000MHZ CL 30-38-38-38 - 96 2x16 Hynix A die getting lower read speeds on EXPO, and when overclocking.

[desiprofessor]

Hi all,

I was using some custom timings that a user on Overclockers.net is using. He's a seasoned veteran. 6200mhz cl28 settings and my read speeds are quite low. With the 6200mhz timings it hits 45000, on his any many other people's hynix ddr5 ram it hits about 90000. I was told to switch to all default and just turn on expo. It's improved. But even on Expo, they only hit 78000. . No errors on Karhu, and TM5 overnight. Same thing with the Expo II settings.

I've used buildzoids hynix timings previous to this for the last 2 weeks, and everything is stable. What can I do to increse my ram speeds? Many others are getting 90000 read speeds. I was told 45000 is showing that my ram is limping to be stable, so I'm just wondering what to change to increase that speed.

Some said as a solution to reduce FCLK speed, so from 2167 I changed it to 2000, and it made no difference. Another person said that I need to change my trf1 setting, but you can't change that on AMD motherboards.

Mine is a 6000mhz gskill 2x16 kit hynix a die, CL 30-38-38-38-96.

I've got the rog strix e gaming wifi x670e motherboard on the 7950x3d cpu.

Any help here would be greatly appreciated.

Hello bump on this, any help can be provided?

 

[ir_cow]

6200 CL28 isn't unheard of. Usually it's done at 6000, but good bin kits or more voltage will work too for that.

I would set everything back to defaults without expo / XMP and start over. Your 48k read is like you only have 1 stick installed.

 

[desiprofessor]

6200 CL28 isn't unheard of. Usually it's done at 6000, but good bin kits or more voltage will work too for that.

I would set everything back to defaults without expo / XMP and start over. Your 48k read is like you only have 1 stick installed.

View attachment 290369

Thanks for the response!

Hmmm, I see, what do I need to do to once I set everything to default, by that I assume expo off as well?

Looking at the timings I have, is there something specific on the 6200 OC that could be tweaked, or?

I'm justing someone elses settings, but they have the 64gb version of similar gskill hynix a die kit.
79000 good?

Is there soemthing from there, we can plop into the 6200mhz zen timings settings?

Sorry I'm a total newbie at overclocking ram, so I really dont' know where to get started if I started from scratch. Prior to this I was running Buildzoid's hynix a die settings and that's been stable for 2 weeks.
Looking at my expo settings, is

 

[ir_cow]

I just suggest defaults to solve the read mystery first. Than you can play with overclocking.

Plus at least you know about Karhu, and TM5, so your already ahead of many when it comes to memory overclocking.

 

[evernessince]

Some said as a solution to reduce FCLK speed, so from 2167 I changed it to 2000, and it made no difference. Another person said that I need to change my trf1 setting, but you can't change that on AMD motherboards.

FCLK doesn't impact read speeds much, below is a chart showing the bandwidth with FCLK set to 1600 (which is quite slow considering 1:1:1 DDR5 5200 is 1733):

As you can see, it's only writes that fall off with a slower FCLK.

I would suggest loading BIOS defaults then enabling EXPO as you know you get good performance with that enabled. You can then use that as a base to tweak towards your target frequency of 6200 and timings. That way when your RAM performance drops, you know the exact cause of that drop. It could be something specific to your motherboard, poor CPU memory controller quality, or just that the RAM cannot handle those tighter timings / higher frequency. I assume you are setting your RAM and SOC voltages correctly as you watch buildzoid. Most X670 boards are pretty good with automatically upping the RAM voltage when EXPO is enabled to help RAM OCing.

 

[desiprofessor]

I just suggest defaults to solve the read mystery first. Than you can play with overclocking.

Plus at least you know about Karhu, and TM5, so your already ahead of many when it comes to memory overclocking.

Okay thanks man, I'll report back haha!

FCLK doesn't impact read speeds much, below is a chart showing the bandwidth with FCLK set to 1600 (which is quite slow considering 1:1:1 DDR5 5200 is 1733):

View attachment 290371

As you can see, it's only writes that fall off with a slower FCLK.

I would suggest loading BIOS defaults then enabling EXPO as you know you get good performance with that enabled. You can then use that as a base to tweak towards your target frequency of 6200 and timings. That way when your RAM performance drops, you know the exact cause of that drop. It could be something specific to your motherboard, poor CPU memory controller quality, or just that the RAM cannot handle those tighter timings / higher frequency. I assume you are setting your RAM and SOC voltages correctly as you watch buildzoid. Most X670 boards are pretty good with automatically upping the RAM voltage when EXPO is enabled to help RAM OCing.

Thanks man, yeah I am following buildzoid, least I did with my prveious settings that I didn't post. Buildzoid did say it should be able to handle 1.4 to 1.45, there hasn't been any issues with heating from what I can see. I would lower the voltages a bit, but I want to ensure speed and stability first.

 

[Calenhad]

Every stick of RAM is different. Just because another experienced user managed certain timings on a kit like yours, does not mean that your kit will work. From your original post it sounds like you are pushing too tight timings for your kit. I would either load the EXPO profile and tweak from there. Or if Buildzoid timings works, start with those and see if you can improve from there.

Most X670 boards are pretty good with automatically upping the RAM voltage when EXPO is enabled to help RAM OCing.

This is literally in the EXPO profile. If your motherboard does not set the manufacturer specified RAM voltage when you load the profile, something is wrong.

 

[MainSource]

Okay thanks man, I'll report back haha!



Thanks man, yeah I am following buildzoid, least I did with my prveious settings that I didn't post. Buildzoid did say it should be able to handle 1.4 to 1.45, there hasn't been any issues with heating from what I can see. I would lower the voltages a bit, but I want to ensure speed and stability first.

I would first load optimized defaults, then turn on expo 1, set flck to 2000, go into timings menu8, then first submenu on top, load the first profile for hynix 6200, set tref(i think?) to 50000, change latency from 32 to 30, go back and lower the voltage that is set to 1.14 to 1.09, leave the other voltages as is. I have the exact same setup but with a 7900x3d and this get me decent speeds, also try mem context both ways and mem=cclk 1 or something like that in the timings menu

 

[desiprofessor]

A

I would first load optimized defaults, then turn on expo 1, set flck to 2000, go into timings menu8, then first submenu on top, load the first profile for hynix 6200, set tref(i think?) to 50000, change latency from 32 to 30, go back and lower the voltage that is set to 1.14 to 1.09, leave the other voltages as is. I have the exact same setup but with a 7900x3d and this get me decent speeds, also try mem context both ways and mem=cclk 1 or something like that in the timings menu

Awesome thank you, do you mind sharing your zen timings please?

Also why Expo 1 instead of Expo 2?

Hi all, reporting back. I still have to do some testing on TM5 overnight, but it passed Karhu no problem.

Got it to 90,000 mb/s read and write. The trick was to change the tRDRDSC. I tried to raise the refresh interval before that and lower the fclock and it didn't make much of a difference.

These are my timings now along with bench.

Imgur: The magic of the Internet

Anything else I can do to further tighten it up?

Bad news got 14 errors on tm5 after 2 hours of testing lol.

What else should I tweak?

 

[evernessince]

Thanks man, yeah I am following buildzoid, least I did with my prveious settings that I didn't post. Buildzoid did say it should be able to handle 1.4 to 1.45, there hasn't been any issues with heating from what I can see. I would lower the voltages a bit, but I want to ensure speed and stability first.

I'd have to agree with buildzoid, my motherboard automatically sets memory voltage to 1.45v when EXPO is enabled and there are other vendors that do so as well.

 

[Steevo]

May be a case of faulty RAM or ECC kicking in causing extra latency.

 

[ir_cow]

You can only go so low on the sub-timings before you need to up the voltage(s). CPU mem related ones and DRAM.

Also a fan on the memory helps. You want to be in the 45-50c range go avoid some of those errors.

 

[desiprofessor]

You can only go so low on the sub-timings before you need to up the voltage(s). CPU mem related ones and DRAM.

Also a fan on the memory helps. You want to be in the 45-50c range go avoid some of those errors.

Yeah ave temp is 47

 

[tanaka_007]

For example, when using Hynix A-die DDR5-5600 1.1v to OC for DDR5-9300 1.8v (Async),
it needs to be water cooled with a 2DIMM slot M/B.
6000+ 1.5v (Sync) should be fine with 4DIMM slot M/B and air cooling.
*Except for unreasonable timing settings or insufficient voltage.
*2DIMM Slot M/B + Hynix A-die 1R = DDR5-9300+(OC)
*4DIMM Slot M/B + Hynix A-die 1R = DDR5-7200+(OC)

 

[ir_cow]

@tanaka_007 no one is running 9300 daily. Those OCs are unstable as hell and just for records. Also requires a crap ton of voltage.

 

[desiprofessor]

Well things seem to have stabilised and I have the read speeds at 90,000. Ran TM5 for about 4 hours over night, I'll do another 8 hours today, but so far so good.

Rocking the 6200 cl28

I did need to put a fan on the ram though lol, it was going to 67 celcius. The fan has the temps down to 53c. I blame my ambient temperature which is between 25 to 30c. I live in Jakarta, Indonesia.

 

[ir_cow]

Just for reference I've come across ram that errors out at 70c just with the XMP profile.

Also, I don't think anyone else has a temp sensor for the actual ICs. The sensor sits next to the SPD chip. Igorlab did a article when DDR5 first came out showing SPD temp is 10c lower vs the ICs.

 

[desiprofessor]

On another note, has anyone figure out how to measure Average clock speeds for CCD0 (vcache ccd) of the 7950x3d on hwinfo?

It only has the full CPU clock speed, but not for the 2 ccds? Would this somethign that HWinfo would need to update, or has someone figured it out. Right now on afterburner OSD I have to have all the cores showing to see the clock speed of the vcache ccd.

Just for reference I've come across ram that errors out at 70c just with the XMP profile.

Also, I don't think anyone else has a temp sensor for the actual ICs. The sensor sits next to the SPD chip. Igorlab did a article when DDR5 first came out showing SPD temp is 10c lower vs the ICs.

So the sensor reading I am getting on Hwinfo for the dimms is innacurate and the ram is actually 10c hotter?

 

[ir_cow]

So the sensor reading I am getting on Hwinfo for the dimms is innacurate and the ram is actually 10c hotter?

It can be yes. https://www.igorslab.de/en/how-hot-...-vs-real-measurement-at-module-investigative/ . It kinda makes sense why I error out at 70c, if the datasheets for JEDEC says "up to" 85C.

I have some thermal probes. When I get time I want to probe the PCB, ICs and see what the SPD sensor says.

 

[desiprofessor]

It can be yes. https://www.igorslab.de/en/how-hot-...-vs-real-measurement-at-module-investigative/

I have some thermal probes. When I get time I want to probe the PCB, ICs and see what the SPD sensor says.

Ah okay gotcha.

 

[GRABibus]

Hi all,

I was using some custom timings that a user on Overclockers.net is using. He's a seasoned veteran. 6200mhz cl28 settings and my read speeds are quite low. With the 6200mhz timings it hits 45000, on his any many other people's hynix ddr5 ram it hits about 90000. I was told to switch to all default and just turn on expo. It's improved. But even on Expo, they only hit 78000. . No errors on Karhu, and TM5 overnight. Same thing with the Expo II settings.

I've used buildzoids hynix timings previous to this for the last 2 weeks, and everything is stable. What can I do to increse my ram speeds? Many others are getting 90000 read speeds. I was told 45000 is showing that my ram is limping to be stable, so I'm just wondering what to change to increase that speed.

Some said as a solution to reduce FCLK speed, so from 2167 I changed it to 2000, and it made no difference. Another person said that I need to change my trf1 setting, but you can't change that on AMD motherboards.

Mine is a 6000mhz gskill 2x16 kit hynix a die, CL 30-38-38-38-96.

I've got the rog strix e gaming wifi x670e motherboard on the 7950x3d cpu.

Any help here would be greatly appreciated.

Hello bump on this, any help can be provided?

How do you know it is A-Die ?

 

[ir_cow]

How do you know it is A-Die ?

Peal the heat spreader off and check the part number

 

[jesdals]

Any one know if theThaiphoon tool work with DDR5?

 

[desiprofessor]

How do you know it is A-Die ?

With gskill the serial number sticker has an M or A. M for M Die, A for A die.