[jiffysound]

A while ago I tested my ram using Aida64 Memory test and got these results :

Now a few months later I did the same test and got this result :

What changes have been made, I updated the bios from F12K to F12, one of my RAM sticks is lost it's RBG lighting , my RAM is as follows : G Skill F4-3600C17-16GTZR x 4 16gb B Die Samsung modules. I have been thinking of removing the dull stick and going 32GB instead of 64GB, might even improve my RAM overclock which is a measly 3466 Mhz. I am really stumped as to what happened to my ram, Could it be a Windows update? I have Secure boot enabled . TPM enabled via a TPM external module, I have HVCI enabled. I am trying to give you guys as much information available. Is it time to invest in a new set of 4x16GB of RAM, I really would not cause I've spent so much on this build already. Any suggestions is welcome. Thanks guys.

 

[JSHamlet234]

Your L3 latency is sky high and your L2 bandwidth is way down. I'm not sure what the problem is, but I don't think it's being caused by your RAM.

 

[jiffysound]

Your L3 latency is sky high and your L2 bandwidth is way down. I'm not sure what the problem is, but I don't think it's being caused by your RAM.

Well then what do you think could be the culprit?

 

[JSHamlet234]

Well then what do you think could be the culprit?

I would start by clearing the CMOS and see if anything changes. If not, it's probably on the software side of things.

 

[jiffysound]

My timings.

I noticed one thing on I/O Latency (tiOL) DIMM1 13T DIMM2 13T DIMM3 14T DIMM4 14T , does that mean anything bad ?

 

[JSHamlet234]

I noticed one thing on I/O Latency (tiOL) DIMM1 13T DIMM2 13T DIMM3 14T DIMM4 14T , does that mean anything bad ?

No. There's nothing there that would explain the performance issues you're having.

 

[Hequaqua]

Isn't North Bridge clock part of memory? Second set is a full 200mhz lower. I've been on AMD for a few years, but I think that NBC is Ring on Intel. Try changing that to 4700mhz and check results.

 

[The_King]

Open task-manager and check if any process has high CPU usage. WMI host is sometimes to blame.

Disable all 3rd party apps and software from memory including any hardware monitoring RGB software disconnect from the internet for 1 minute and run the AIDA64 test again.

 

[OLDFATSHEEP]

you may check your windows power manager settings.

 

[Cryptedvick]

You definitely have something wrong there.
Below is my run with identical CPU frequencies and slightly slower RAM.

I used to have a comparable issue before, where for me it would benchmark around 35000MB/s and 65ns and for the life of me could not point out to what was causing it. I did all the possible cleanups, uninstalled unwanted problems, stopped all unnecessary processes and nothing worked. Only in Safe Mode I was getting the correct scores.
You should boot into Safe Mode and run the benchmark there and you will most likely see that its back to your normal scores.
This is an OS problem, a clutter problem most likely if you have many programs and apps installed.

For me, the only fix was to to a fresh Windows install and now, over a year later, its still ok, scores are still where they need to be.
Somehow, something in the background is affecting your performance in my opinion.

 

[jprovido]

I don't think ram "deteriorates" in performance. I'm pretty sure it's something else. I've been using the same 32GB 3200MHz CL16 kit since I built my X99 PC. it's been 6 years now? overclocked/tuned since the day I got it. (I'm still using it on my 10th gen i9).

I had a similar annoying issue that I couldn't figure out. I literally did a clean install of windows maybe 3 weeks ago? it works perfect now lol

 

[jiffysound]

Isn't North Bridge clock part of memory? Second set is a full 200mhz lower. I've been on AMD for a few years, but I think that NBC is Ring on Intel. Try changing that to 4700mhz and check results.

I tried setting it to 4700Mhz and still same result.

 

[deadfelllow]

I tried setting it to 4700Mhz and still same result.

Can you do this test on safe mode please?

Maybe there is a lot services running on background or some apps/services/drivers impacting the latency

 

[jiffysound]

Can you do this test on safe mode please?

Maybe there is a lot services running on background or some apps/services/drivers impacting the latency

I did it in safe mode, had to reinsert the bitlocker key after I was done , nonetheless I got good results on safe mode, what should be. So It is something software related. Dang it.

 

[deadfelllow]

I did it in safe mode, had to reinsert the bitlocker key after I was done , nonetheless I got good results on safe mode, what should be. So It is something software related. Dang it.

Yes.

Same happened to me. After installing fresh windows it is fixed.

 

[MagicBox]

A while ago I tested my ram using Aida64 Memory test and got these results : View attachment 2560277

Now a few months later I did the same test and got this result : View attachment 2560278

What changes have been made, I updated the bios from F12K to F12, one of my RAM sticks is lost it's RBG lighting , my RAM is as follows : G Skill F4-3600C17-16GTZR x 4 16gb B Die Samsung modules. I have been thinking of removing the dull stick and going 32GB instead of 64GB, might even improve my RAM overclock which is a measly 3466 Mhz. I am really stumped as to what happened to my ram, Could it be a Windows update? I have Secure boot enabled . TPM enabled via a TPM external module, I have HVCI enabled. I am trying to give you guys as much information available. Is it time to invest in a new set of 4x16GB of RAM, I really would not cause I've spent so much on this build already. Any suggestions is welcome. Thanks guys.

Hey there,

Your ram sticks are fine. What is going on is something I discovered and realized myself not too long ago. What is going on is the fact that you have lowered your cache speed by 200MHz, from 4.7G back to 4.5G.

The 'problem' is that on Intel, the L3 cache is a shared resource. It sits between the memory channels and the CPU cores. As a result of this, all 2 or 4 memory channels have to go through the L3 cache before it diverts again between the CPU cores. So, it's an L3 cache bottleneck.

I've noticed this with my 5960X, which has 4 channels. One stick gives an accurate bandwith number. With two sticks, this bandwidth doubled, a near 100% scaling. When I added the 3rd stick, I no longer had another 100% scaling. In terms op multiplication, with 3 sticks, the bandwidth increased somehwere towards 2.7x, rather than 3x. Adding in a 4th stick barely increased bandwidth.

I had noticed a long time before already that increasing the cache frequency added to the RAM bandwidth, which I found sorta odd back in time because well the AIDA test tests each ram path component individually and thus didn't expect much an increase in RAM bandwidth.

This leaves us sorta with a question. What's the point in high-speed sticks in multichannel configurations when there is an L3 cache bottleneck? My figure is that possibly with a single-threaded memory intensive operation so that the speed of only one channel matters, still makes fast sticks with tight timings worth it. But when multiple threads access memory (physics on CPU to offload GPU etc) you'll hit the L3 cache bottleneck.

I'm surprised though that you run iinto cache congestion with only dual channel. Maybe that's a tribute to your sticks

===========

Edit: Can you run a mem bench with just one stick, and set the stick to its XMP speeds and then back to your 3466 15-15-15 settings? So 2 benches for one stick. Intel docs say the memory bandwith for your CPU is 41.6 G/sec. With one stick you can check the stick bandwidth, staying below the total bandwith across 2 channels.

 

[inedenimadam]

Almost certainly OS congestion.

 

[littledonny]

Your OS has COPD

 

[Arctucas]

Lower Uncore (Ring or NB) clock will have some effect.

Background processes will have some effect.

Your RTL is good, but maybe your IOL are high?

 

[jiffysound]

Lower Uncore (Ring or NB) clock will have some effect.

Background processes will have some effect.

Your RTL is good, but maybe your IOL are high?

What is an IOL ?

Side question: I TPM and bitlocker enabled and how would that effect me reinstalling windows ? Would it be straight up USB mount and install from USB Tumb Drive or would the bitlocker get in the way ?