Question CAS# Latency reading as 18 in CPU-Z but set to 17 in Bios

[CIGAARR]

Can this cause BSOD?
I have been getting them frequently and just noticed that in CPU-Z that the CAS# Latency is different to what I set in the bios.

In the Bios I set it to 17 but in CPU-Z it shows as 18

 

[Roland Of Gilead]

Are you running a Ryzen system? Sometimes Ryzen IMC doesn't like odd numbered timings, and will round up.

You can get around this by enabling/disabling gear down mode in your bios. Try that and report back.

 

[CIGAARR]

Thanks for replying
Yes, I am running a Ryzen system, here are my PC Specs.

CPU: AMD Ryzen 5 1600 Six-core Processor
GPU: ASUS ROG STRIX RX 580 GAMING TOP 8GB
RAM: G.skill F4-3600C17-8GTZR (Trident Z RGB DDR4-3600MHz CL17-18-18-38 1.35V 16GB (2x8GB)
MOTHERBOARD: ASUS ROG STRIX B350-F GAMING
PSU: Corsair 550 W RM550x Series 80 Plus Gold Full Modular ATX
STORAGE:
1 x Seagate 2TB 3.5" SATA3 FireCuda SSHD ST2000DX002
1 x 250GB Samsung 960 Evo PCIe NVMe Solid State Drive

This is my first PC build, and I accidently bought memory with a 3600MHz that my motherboard doesnt support, so I am currently running it at 3200MHz.

I have also overclocked my CPU so not sure if its that thats causing instability. Im new to it and just followed some tutorials.

But I just ran a AIDA64 stress test which failed with error "hardware failure detected"

I'll have a look for this "Gear down mode" in the bios and alternate it from whatever setting its currently on and let you know if my timings change.

 

[CIGAARR]

So I've set the geardown mode option from auto to disabled. But now my Pc won't boot atall

 

[DMAN999]

So I've set the geardown mode option from auto to disabled. But now my Pc won't boot atall

Then you will need to Clear the CMOS then re-enable the XMP/DOCP profile (with frequency set to 3200) and leave Gear Down Mode enabled (Auto should be fine as well).

If you want to try to tighten the Timings I suggest you read the instructions for using Thaiphoon Burner and the Ryzen DRAM Calculator:

Info - Announcing DRAM Calculator for Ryzen with an Integrated Benchmark

1usmus just released a new version of the DRAM Calculator: https://www.techpowerup.com/forums/threads/announcing-dram-calculator-for-ryzen-v1-5-0-with-an-integrated-benchmark.255229/ Version 1.70: https://www.techpowerup.com/download/ryzen-dram-calculator/ Added functionality to read current...

forums.tomshardware.com

And personally, I'd start by setting the timings to 18-18-18-38 in the BIOS and see how that performs.

 

[Roland Of Gilead]

So I've set the geardown mode option from auto to disabled. But now my Pc won't boot atall

DMAN999 is my reference here for gear down mode. I'd follow his advice. He's more up on it than I am.

 

[Roland Of Gilead]

By resetting CMOS, you will wipe your CPU OC, which isn't a bad idea.

Start with your ram, get it running as best you can, then go back and do the CPU again.

This is a great guide for beginners: https://forums.tomshardware.com/faq/cpu-overclocking-guide-and-tutorial-for-beginners.3347428/

Lots of good info here which will help you.

 

[DMAN999]

Start by Going into the BIOS and go to the Exit Tab and choose Set Optimized Defaults.
Then Exit and Save settings.
It will reboot, then go into the BIOS again and choose the DOCP Profile (on the AI Tweaker Tab).
It should look something like this:

https://imgur.com/SYBM7kH

View: https://imgur.com/SYBM7kH


Then go to the EXIT tab in the BIOS and choose Save and Exit.

And since you seem to be Very new to changing BIOS settings I would NOT chnnage anything else in the BIOS.
Just run the PC and once in Windows take a screen shot of CPUz Memory Tab and upload it to imgur.com then post the link they provide here.

 

[CIGAARR]

I just tried but it wouldn't boot after, I think it's because my memory frequency is at 3600 and the motherboard only supports to 3200 I think

 

[CIGAARR]

Should I change frequency to 3200 and save and exit? I'm back in the bios

 

[DMAN999]

Yes.
Sorry I should have said for you to set the DRAM Frequency to 3200.
So do that and then save and reboot.

 

[CIGAARR]

No problem, Heres the screen.

Its weird that I get a higher score on cinebench without using DOCP

https://imgur.com/01wYgcu

View: https://imgur.com/01wYgcu

 

[DMAN999]

That looks good.
I'd leave the RAM settings alone for now.

You might want to download Aida64 and run the Cache and Memory Benchmark (under the Tools Menu) and see how your results compare to other people who have your same speed RAM.
3200 RAM on a 2700x:

https://www.techpowerup.com/forums/...and-memory-benchmark-here.186338/post-4008826

3333 RAM on a 1600x Rig:
https://www.techpowerup.com/forums/...and-memory-benchmark-here.186338/post-4030308
3200 RAM on a 2700:
https://www.techpowerup.com/forums/...and-memory-benchmark-here.186338/post-4064663

Just as a reference here are my results:

https://imgur.com/EBMcJrw

View: https://imgur.com/EBMcJrw

 

[CIGAARR]

I only have the trail version but heres my read speed

https://imgur.com/7KOE9hN

View: https://imgur.com/7KOE9hN

 

[DMAN999]

That looks good.
Your Read speed is better than mine.
If you want you could go into the BIOS and try tweaking the timings to get the Latency down BUT it probably won't make any real difference other than on benchmarks.

IMO you should just leave it alone and be happy that it works and performs pretty well.

 

[CIGAARR]

I just run cinebench and got a terrible score though :S

https://imgur.com/EbSIuF9

View: https://imgur.com/EbSIuF9

 

[DMAN999]

I can't view that image on imgur for some reason it keeps asking me to log in.

What were the multi and single core scores for you ?

 

[CIGAARR]

Yeah I just got the same message.

im not sure how to check the multi and single core scores but my final score was only 769..

 

[CIGAARR]

I was getting around double that when DOCP was off

 

[DMAN999]

That's the multicore score and should be somewhere around 2500 for your CPU.
Something is seriously wrong.
Do you have the latest AMD Chipset drivers installed ?
If you are not sure download them from here and install them the reboot:
https://www.amd.com/en/support/chipsets/amd-socket-am4/b350

Then go into the Control Panel, Power Options and select the Ryzen balanced Power Plan and set it up like this:

https://imgur.com/2i57OOA

View: https://imgur.com/2i57OOA

 

[DMAN999]

PS
On Imgur you need to use the Copy link pop up link.

https://imgur.com/5sB89p9

View: https://imgur.com/5sB89p9

 

[CIGAARR]

Oh, iv never downloaded a chipset driver, im guessing its a driver for the CPU?

I didnt even know they existed. Thanks!

Im installing it now, ill get back to you after a reset, power settings change and a second benchmark on cinebench.

P.S yeah I have been using the popup

 

[DMAN999]

Click on Change Plan Settings just to the right of the Ryzen Balanced Power Plan.
Then click here:

https://imgur.com/0m7wObQ

View: https://imgur.com/0m7wObQ

 

[CIGAARR]

Okay, I changed min from 90% to 10%

 

[CIGAARR]

Should I run cinebench?