Ryzen 3900X can't clock 1800MHz Infinity Fabric with 3600 CL14. Disappointed with Ryzen.

[eMWu]

For anyone having problems trying to use 3733Mhz on b-die using DRAM calculator, try settings: tFAW to 20 or 24(calculator provides 16 but my kit didnt like it >= 3600Mhz) tRDWR to 9 (calculator provides 8 but my kit didnt like it too). Now im fully stable(memtest overnight, 2h aida64 stress test, 2h prime95 3x different tests) at 3733MHz 15-15-16-15-32 1.43V and 1.1V SOC. Getting 63.3-63.9 latency. Couldnt get 3733Mhz CL14 stable, but i will try some tweaks if I have time.

 

[KhakiKukhi]

For anyone having problems trying to use 3733Mhz on b-die using DRAM calculator, try settings: tFAW to 20 or 24(calculator provides 16 but my kit didnt like it >= 3600Mhz) tRDWR to 9 (calculator provides 8 but my kit didnt like it too). Now im fully stable(memtest overnight, 2h aida64 stress test, 2h prime95 3x different tests) at 3733MHz 15-15-16-15-32 1.43V and 1.1V SOC. Getting 63.3-63.9 latency. Couldnt get 3733Mhz CL14 stable, but i will try some tweaks if I have time.

Wow, that's amazing. Good job! I'm stick on 3600 CL16 myself due to stability reasons. Can I have a picture of your DRAM Calculator settings?

 

[Chomiq]

He's using Samsung's B-Die.

 

[eMWu]

Wow, that's amazing. Good job! I'm stick on 3600 CL16 myself due to stability reasons. Can I have a picture of your DRAM Calculator settings?

Sure, when I return from work I'll post my timings.

Right now I noticed that good settings, even without manual oveclock can give me pretty good gains, while not pushing voltages too far.
In most 3900x reviews is see Fire Strike CPU score about 28000-28500 points:

I scored 20 473 in Fire Strike

AMD Ryzen 9 3900X, NVIDIA GeForce GTX 1080 x 1, 16384 MB, 64-bit Windows 10}

www.3dmark.com

Time Spy 12000-12500:

I scored 8 105 in Time Spy

AMD Ryzen 9 3900X, NVIDIA GeForce GTX 1080 x 1, 16384 MB, 64-bit Windows 10}

www.3dmark.com

 

[KhakiKukhi]

He's using Samsung's B-Die.

Oh, I got too excited and missed he B-die part.
Oh well, 3600 is OK I guess. Even though I dropped 150 points in Cinebench and have 69ns latency now.
At least it's stable.

 

[eMWu]

Oh, I got too excited and missed he B-die part.
Oh well, 3600 is OK I guess. Even though I dropped 150 points in Cinebench and have 69ns latency now.
At least it's stable.

69ns latency is okay. I don't see big difference in games performance when going from 3400MHz cl14(latency 67 - 68ns) to 3733MHz cl5(63 - 64ns)

I've tested Far Cry 5, GTA V and Metro Exodus. Only 1-2% bump.

Result

www.3dmark.com

 

[TheLostSwede]

69ns latency is okay. I don't see big difference in games performance when going from 3400MHz cl14(latency 67 - 68ns) to 3733MHz cl5(63 - 64ns)

I've tested Far Cry 5, GTA V and Metro Exodus. Only 1-2% bump.

Result

www.3dmark.com

63-64 is about as good as it gets with Ryzen 3000, so you have nothing more to improve on there for the time being at least.
Obviously we don't know if there will be some changes with new AGESA's, but it's unlikely, since the latency has a lot to do with the chip design.

 

[Chomiq]

Oh, I got too excited and missed he B-die part.
Oh well, 3600 is OK I guess. Even though I dropped 150 points in Cinebench and have 69ns latency now.
At least it's stable.

65-75ns is the expected latency window for 1:1 FCLK on Ryzen 3000 series. Beside, the result often vary by 1-2 ns between runs.

 

[eMWu]

63-64 is about as good as it gets with Ryzen 3000, so you have nothing more to improve on there for the time being at least.
Obviously we don't know if there will be some changes with new AGESA's, but it's unlikely, since the latency has a lot to do with the chip design.

I'm curious how much the latency improve going from cl15 to cl14 @3733MHz but my memory kit gives me hard time going to cl14 just for testing purposes ill try to bump dram voltage and tweak a little bit, but i'll probably stick to my current settings... I feel comfortable with 1.43V

 

[TheLostSwede]

I'm curious how much the latency improve going from cl15 to cl14 @3733MHz but my memory kit gives me hard time going to cl14 just for testing purposes ill try to bump dram voltage and tweak a little bit, but i'll probably stick to my current settings... I feel comfortable with 1.43V

Have a look here. The latency actually increased by 1ns going from 16 to 14...

AMD Ryzen 3000 – Part IV – DDR4 Scaling – ENGLISH Version

DDR4 Scaling PAGE GUIDE FOR THE MOBILE READERS 1 & 2 – Background info and news regarding the AMD Zen 2 memory sub-system 3 – Testbed 4 – 12 – CPU Tests 13 &#8211…

lab501.ro

 

[eMWu]

Have a look here. Sadly no full benchmarks, just AIDA.

AMD Ryzen 3000 – Part IV – DDR4 Scaling – ENGLISH Version

DDR4 Scaling PAGE GUIDE FOR THE MOBILE READERS 1 & 2 – Background info and news regarding the AMD Zen 2 memory sub-system 3 – Testbed 4 – 12 – CPU Tests 13 &#8211…

lab501.ro

Thanks!
So I guess i could cut to about 61-62ns maybe... If I could stay <=1.45v it could be worth the effort but I doubt I can get it stable under ~1.47-8v

 

[phanbuey]

69ns latency is okay. I don't see big difference in games performance when going from 3400MHz cl14(latency 67 - 68ns) to 3733MHz cl5(63 - 64ns)

I've tested Far Cry 5, GTA V and Metro Exodus. Only 1-2% bump.

Result

www.3dmark.com

Thats pretty good scaling 5-6% latency reduction to a 1-2% gain in fps. That's like getting an extra 100Mhz boost on the 3900x.

Is anyone running 4 sticks on ryzen successfully at ~64ns?

 

[eMWu]

Thats pretty good scaling 5-6% latency reduction to a 1-2% gain in fps. That's like getting an extra 100Mhz boost on the 3900x.

Is anyone running 4 sticks on ryzen successfully at ~64ns?

I think U can get even more just taking care of voltages/temperatures of the 3900X. My Gigabyte board set them waay to high and that reduces performance.

 

[jesdals]

I'm curious how much the latency improve going from cl15 to cl14 @3733MHz but my memory kit gives me hard time going to cl14 just for testing purposes ill try to bump dram voltage and tweak a little bit, but i'll probably stick to my current settings... I feel comfortable with 1.43V

Tried CL14- at 1867MHz the matching setting on my setup, with 1.46v on memory and 1.45 and 1.5 vcore -with 4500MHz Pstates setting could boot but not get into windows - CL14-16-14-14-30-44-1T at 1833 MHz on memory and infinity fabric is possible

 

[eMWu]

63-64 is about as good as it gets with Ryzen 3000, so you have nothing more to improve on there for the time being at least.
Obviously we don't know if there will be some changes with new AGESA's, but it's unlikely, since the latency has a lot to do with the chip design.

U were right I managed to get it to work at 3733 CL14 but no latency improvement... I guess that without going higher with Infinity Fabric, latency wont get any better.

Does anyone know what memory read/write/copy should I get? Its hard to find any valid info because 3900x reviews provide mixed results...

 

[HTC]

U were right I managed to get it to work at 3733 CL14 but no latency improvement... I guess that without going higher with Infinity Fabric, latency wont get any better.

Does anyone know what memory read/write/copy should I get? Its hard to find any valid info because 3900x reviews provide mixed results...

@TheLostSwede answered that for you in this topic's post #210.

 

[eMWu]

@TheLostSwede answered that for you in this topic's post #210.

Oh, right thanks. Seems ok then

 

[Roddey]

Is anyone running 4 sticks on ryzen successfully at ~64ns?
[/QUOTE]
I dont know. 4 sticks Teamgroup Nighthawk b-die at 3600mhz cas 14

.

 

[phanbuey]

I dont know. 4 sticks Teamgroup Nighthawk b-die at 3600mhz cas 14View attachment 131535.

Thats awesome thank you for that! I have the Team Dark Pro 3200 C14 these look like the same exact chips.

 

[Roddey]

Thats awesome thank you for that! I have the Team Dark Pro 3200 C14 these look like the same exact chips.

Your welcome. Using dram calculator the fastest I can seem to get is 3600mhz/1800flck. 3733 using safe or fast settings causes it to keep rebooting and I have to turn the power switch off and then back on(power supply) then hit f1 to get back into the bios. I think the ram chips can go faster, but the dram calc. settings dont work for me past 3600mhz.

 

[TheLostSwede]

Your welcome. Using dram calculator the fastest I can seem to get is 3600mhz/1800flck. 3733 using safe or fast settings causes it to keep rebooting and I have to turn the power switch off and then back on(power supply) then hit f1 to get back into the bios. I think the ram chips can go faster, but the dram calc. settings dont work for me past 3600mhz.

Did you upgrade to the latest version?

 

[Roddey]

Your welcome. Using dram calculator the fastest I can seem to get is 3600mhz/1800flck. 3733 using safe or fast settings causes it to keep rebooting and I have to turn the power switch off and then back on(power supply) then hit f1 to get back into the bios. I think the ram chips can go faster, but the dram calc. settings don't work for me past 3600mhz.

Same with two or four ram modules getting past 3600mhz. Although I read in a post somewhere that there are people getting these to work at 3733 by changing some of the dram calc. suggested settings. After a few more bios updates maybe I will try again.

Did you upgrade to the latest version?

Yes

Did you upgrade to the latest version?

The settings that I highlighted have me a little confused for 3733. Maybe I am doing something wrong, I don't know how to set those.

Did you upgrade to the latest version?

Sorry about all the post but I am not a savy as a lot of you guys are concerning a bios. At 3600mhz just changing the timings and leaving everything else except the voltage on auto works. At 3733 auto no longer works and I cant find bgs or bgs alt in the bios.

 

[TheLostSwede]

No idea what BGS is.
FCLK should be in your UEFI, somewhere in the AMD settings.
That's just to make sure it's set to the same as the IF, although it might do this automagically, depending on the UEFI.

 

[biffzinker]

No idea what BGS is.

Bank Group Swap

 

[gerardfraser]

Well a tip for people wanting to see lower latency number. How to impress the neighbors J/K

Open Power Settings Explorer
Go to Interrupt Steering Settings
Put check mark/un-check by Interrupt Steering Mode
Close Power Settings Explorer
Go to Power Plan of your choice in Windows
Go to Change Advance Power Settings
Go to Interrupt Steering Mode
Change Default to Processor 1
Close, test,magic lower latency number,simple .Be careful when impressing the neighbors,could lead to trouble

Screen Shot click for 4K to read at full size

Spoiler

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Spoiler

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