what is going on with my L3 Cache speed 46GB/s instead of over 650GB/s (5800X)

Mussels · Oct 6, 2021

GerKNG said:
This is not a "Windows 11 issue"
it happens since weeks and under windows 10 too.

i used the same ram and only switched to a 10900k in a z490 unify.
View attachment 219678

If you have these problems in multiple OS and software doesnt solve it, you've got a hardware problem

Have you done anything he hasnt, like enable Rebar in the BIOS, or changed the GPU scheduler in windows? Those definitely screw with some games
Hell even default Gsync/Freesync settings

OneMoar · Oct 6, 2021

wayyy to many people in this thread confusing a issue with AIDA with there borked hardware config
./closethis

windwhirl · Oct 6, 2021

AMD has posted an article on this

https://www.amd.com/en/support/kb/faq/pa-400

Windows® 11 Performance Variation in Certain Applications on Compatible AMD Processors

Article Number
PA-400
This documentation provides information on known performance impacts reported on Windows® 11 when running compatible AMD processors on certain applications.

Issue Description

AMD and Microsoft have determined that compatible AMD processors may exhibit reduced performance in certain applications when running Windows® 11.

Known Performance Changes	Impact	Resolution
Measured and functional L3 cache latency may increase by ~3X.	Applications sensitive to memory subsystem access time may be impacted. Expected performance impact of 3-5% in affected applications, 10-15% outliers possible in games commonly used for eSports.	A Windows update is in development to address this issue with expected availability in October of 2021.
UEFI CPPC2 (“preferred core”) may not preferentially schedule threads on a processor’s fastest core.	Applications sensitive to the performance of one or a few CPU threads may exhibit reduced performance. Performance impact may be more detectable in >8-core processors above 65W TDP.	A software update is in development to address this issue with expected availability in October of 2021.

Additional Information and Workaround

AMD and Microsoft are actively investigating these known issues for resolution via software updates. This knowledge base article will be updated to include version numbers and delivery vehicle(s) when they are available. In the interim, customers using compatible AMD processors affected by these issues may continue to use a supported version of Windows® 10.

Deleted member 212040 · Oct 6, 2021

Meanwhile on Arch Linux:

Sub 10ns, and that memory latency is with all my stuff open + compiling a kernel in the background

Mussels · Oct 7, 2021

This has made many news sites as a windows 11 bug
One of the releases said its the worst on 8 core, 65W CPU's. No explanation why that is.
(Ah, windwhirls thing above covers it)

It's fixed in the dev channel, so the fix is coming to the main release soon enough

Jdogdarkness · Oct 11, 2021

OneMoar said:
AIDA is bugged under Windows 11
Do nothing wait for Either AIDA or windows 11 update
./thread

I have windows 10 though. =/
I would write off AIDA's results but it seems to line up with when i experience game problems. Games that are memory intensive is where i see the problem present itself most clearly. At around 14Gbps I see the problems. Its like the CPU isn't able to pass along data fast enough or isn't being fed data fast enough. I lean towards the CPU

windwhirl · Oct 12, 2021

Jdogdarkness said:
I have windows 10 though

Which version of Windows 10? Please provide full version number (you may find that in Settings, System, About). Mostly to know if this specific bug somehow made its way there or not.

Also, there was an older issue involving the cache, that got fixed through BIOS updates.
My motherboard fixed that back in March:

GerKNG · Oct 12, 2021

Ferrum Master said:
From your specs I understood you have a 5950X not a 5800X.

i own the whole zen 3 lineup (some CPUs multiple times)

but i have an update.
i reinstalled windows 10 and 11 again. (second time) and the two pictures are the results (Win 10 test was actually with steam, spotify, Logitech G Hub and Dropbox open)

since it's a known windows 11/AMD Issue now i'll stick to windows 10 for now since Windows 11 feels more like a very early beta rather than a full product.

Hachi_Roku256563 · Oct 12, 2021

My 3200g is loosing a bit of performance under windows 11 could this be a similar problem
talking like game running at 40 fps (average) instead of 60

Ferrum Master · Oct 12, 2021

windwhirl said:
Which version of Windows 10? Please provide full version number (you may find that in Settings, System, About). Mostly to know if this specific bug somehow made its way there or not.

Also, there was an older issue involving the cache, that got fixed through BIOS updates.
My motherboard fixed that back in March:

That was in march. It was OS agnostic actually and for non ASUS boards. ASUS boards incorporated some tweaks, that are actually crap, but because of that was immune to that bug.

Keullo-e · Oct 12, 2021

Now that I tested it, should the L3 be this slow on a 3600?

Ferrum Master · Oct 12, 2021

Jill Christine Valentine said:
Now that I tested it, should the L3 be this slow on a 3600?

40.9ns shows it.

It should be in the tenths 1x ns

Btw. Do some benchmarking now, leave numbers, after some updates compare, if it really did slow down other apps. So far AIDA and Sandra synthetics are the obvious culprits showing dramatic differences.

Keullo-e · Oct 12, 2021

Ferrum Master said:
40.9ns shows it.

It should be in the tenths 1x ns

Btw. Do some benchmarking now, leave numbers, after some updates compare, if it really did slow down other apps. So far AIDA and Sandra synthetics are the obvious culprits showing dramatic differences.

I have crap on background tho... just jumped from CS to windows just to check TPU and saw this thread etc.

Mussels · Oct 12, 2021

Jdogdarkness said:
I have windows 10 though. =/
I would write off AIDA's results but it seems to line up with when i experience game problems. Games that are memory intensive is where i see the problem present itself most clearly. At around 14Gbps I see the problems. Its like the CPU isn't able to pass along data fast enough or isn't being fed data fast enough. I lean towards the CPU

There was a similar bug with certain AGESA versions.

You haven't filled out your system specs, what motherboard, BIOS and CPU do you have

Keullo-e · Oct 12, 2021

Mussels said:
There was a similar bug with certain AGESA versions.

You haven't filled out your system specs, what motherboard, BIOS and CPU do you have

Thanks for reminding, my board has also got a bios update. I'll install that later.

eidairaman1 · Oct 12, 2021

Ferrum Master said:
You can open up the link in MDL forum, there are some game benchmarks as well.

Most bizarre thing is that if you do a virtual OS, the guest OS doesn't exhibit this bug anymore. It is more complicated than it seems and purely is windows kernel related. Blame Wintel if you wish too.

AFAIK no RTM is sent, is just an another RC.

RTM/RC are still Betas

Metroid · Oct 12, 2021

I have a B450 GAMING PLUS, waiting msi and amd to fix this. Any news if manufactures started releasing bios to fix this issue in windows 11?

Keullo-e · Oct 12, 2021

Metroid said:
I have a B450 GAMING PLUS, waiting msi and amd to fix this. Any news if manufactures started releasing bios to fix this issue in windows 11?

Hard to say. I also installed Win11 yesterday and overall performance seems to be similar to what it was on Win10.

Metroid · Oct 12, 2021

Jill Christine Valentine said:
Hard to say. I also installed Win11 yesterday and overall performance seems to be similar to what it was on Win10.

I'm using the latest bios MSI has provided for my board, everything works good so far however there are few strange issues time to time, some software shut my computer off, strange indeed, not sure if this is related to the l3 cache or something else. Aida64 itself shut down my pc when conducting the memory benchmark, memory is very stable on other stability software, temperature is also not an issue.

Keullo-e · Oct 12, 2021

Metroid said:
I'm using the latest bios MSI has provided for my board, everything works good so far however there are few strange issues time to time, some software shut my computer off, strange indeed, not sure if this is related to the l3 cache or something else. Aida64 itself shut down my pc when conducting the memory benchmark, memory is very stable on other stability software, temperature is also not an issue.

Sounds hella weird. Can't be sure what causes that but that's everything but normal behavior.

Ferrum Master · Oct 12, 2021

Metroid said:
I'm using the latest bios MSI has provided for my board, everything works good so far however there are few strange issues time to time, some software shut my computer off, strange indeed, not sure if this is related to the l3 cache or something else. Aida64 itself shut down my pc when conducting the memory benchmark, memory is very stable on other stability software, temperature is also not an issue.

It maybe be stable on stress, full load. Problems with bad OC using PBO that because Win11 doesn't boost the right cores it stresses out poor OC or even default motherboard settings that are often not so default at all, and not the instability on full load but on medium no or weak load, ie the voltage is not enough for some bad cores. Sudden death, without bsod is usually culprit for not enough voltage.

Jill Christine Valentine said:
Sounds hella weird. Can't be sure what causes that but that's everything but normal behavior.

It ain't.

Metroid · Oct 12, 2021

Jill Christine Valentine said:
Sounds hella weird. Can't be sure what causes that but that's everything but normal behavior.

yes, now i'm afraid to use that aida64 again, for memory and cpu stability I used this program occt https://www.ocbase.com/

Keullo-e · Oct 12, 2021

Metroid said:
yes, now i'm afraid to use that aida64 again, for memory and cpu stability I used this program occt https://www.ocbase.com/

I use Testmem5 for checking memory OC stability, normally I'm paranoid with Russian software but that works like a charm.

Metroid · Oct 12, 2021

Ferrum Master said:
It maybe be stable on stress, full load. Problems with bad OC using PBO that because Win11 doesn't boost the right cores it stresses out poor OC or even default motherboard settings that are often not so default at all, and not the instability on full load but on medium no or weak load, ie the voltage is not enough for some bad cores. Sudden death, without bsod is usually culprit for not enough voltage.

Well for what is worth, cpu is at default settings, no overclocking at all. I used to let it overclocked to 4.5ghz all cores but as I needed a better single core performance, so I let mine 5900x at default to get up to 4.8ghz.

Keullo-e · Oct 12, 2021

Metroid said:
Well for what is worth, cpu is at default settings, no overclocking at all. I used to let it overclocked to 4.5ghz all cores but as I needed a better single core performance, so I let mine 5900x at default to get up to 4.8ghz.

Yeah OC'ing Ryzens is kinda meh, I just have PBO +200 on my 3600 instead of manual OC. Boosts up to 4300 nicely.

System Name	Rainbow Sparkles (Power efficient, <350W gaming load)
Processor	Ryzen R7 5800x3D (Undervolted, 4.45GHz all core)
Motherboard	Asus x570-F (BIOS Modded)
Cooling	Alphacool Apex UV - Alphacool Eisblock XPX Aurora + EK Quantum ARGB 3090 w/ active backplate
Memory	2x32GB DDR4 3600 Corsair Vengeance RGB @3866 C18-22-22-22-42 TRFC704 (1.4V Hynix MJR - SoC 1.15V)
Video Card(s)	Galax RTX 3090 SG 24GB: Underclocked to 1700Mhz 0.750v (375W down to 250W))
Storage	2TB WD SN850 NVME + 1TB Sasmsung 970 Pro NVME + 1TB Intel 6000P NVME USB 3.2
Display(s)	Phillips 32 32M1N5800A (4k144), LG 32" (4K60) \| Gigabyte G32QC (2k165) \| Phillips 328m6fjrmb (2K144)
Case	Fractal Design R6
Audio Device(s)	Logitech G560 \| Corsair Void pro RGB \|Blue Yeti mic
Power Supply	Fractal Ion+ 2 860W (Platinum) (This thing is God-tier. Silent and TINY)
Mouse	Logitech G Pro wireless + Steelseries Prisma XL
Keyboard	Razer Huntsman TE ( Sexy white keycaps)
VR HMD	Oculus Rift S + Quest 2
Software	Windows 11 pro x64 (Yes, it's genuinely a good OS) OpenRGB - ditch the branded bloatware!
Benchmark Scores	Nyooom.

System Name	RPC MK2.5
Processor	Ryzen 5800x
Motherboard	Gigabyte Aorus Pro V2
Cooling	Enermax ETX-T50RGB
Memory	CL16 BL2K16G36C16U4RL 3600 1:1 micron e-die
Video Card(s)	GIGABYTE RTX 3070 Ti GAMING OC
Storage	ADATA SX8200PRO NVME 512GB, Intel 545s 500GBSSD, ADATA SU800 SSD, 3TB Spinner
Display(s)	LG Ultra Gear 32 1440p 165hz Dell 1440p 75hz
Case	Phanteks P300 /w 300A front panel conversion
Audio Device(s)	onboard
Power Supply	SeaSonic Focus+ Platinum 750W
Mouse	Kone burst Pro
Keyboard	EVGA Z15
Software	Windows 11 +startisallback

System Name	System V
Processor	AMD Ryzen 5 3600
Motherboard	Asus Prime X570-P
Cooling	Cooler Master Hyper 212 // a bunch of 120 mm Xigmatek 1500 RPM fans (2 ins, 3 outs)
Memory	2x8GB Ballistix Sport LT 3200 MHz (BLS8G4D32AESCK.M8FE) (CL16-18-18-36)
Video Card(s)	Gigabyte AORUS Radeon RX 580 8 GB
Storage	SHFS37A240G / DT01ACA200 / WD20EZRX / MKNSSDTR256GB-3DL / LG BH16NS40 / ST10000VN0008
Display(s)	LG 22MP55 IPS Display
Case	NZXT Source 210
Audio Device(s)	Logitech G430 Headset
Power Supply	Corsair CX650M
Mouse	Microsoft Trackball Optical 1.0
Keyboard	HP Vectra VE keyboard (Part # D4950-63004)
Software	Whatever build of Windows 11 is being served in Dev channel at the time.
Benchmark Scores	Corona 1.3: 3120620 r/s Cinebench R20: 3355 FireStrike: 12490 TimeSpy: 4624

System Name	Rainbow Sparkles (Power efficient, <350W gaming load)
Processor	Ryzen R7 5800x3D (Undervolted, 4.45GHz all core)
Motherboard	Asus x570-F (BIOS Modded)
Cooling	Alphacool Apex UV - Alphacool Eisblock XPX Aurora + EK Quantum ARGB 3090 w/ active backplate
Memory	2x32GB DDR4 3600 Corsair Vengeance RGB @3866 C18-22-22-22-42 TRFC704 (1.4V Hynix MJR - SoC 1.15V)
Video Card(s)	Galax RTX 3090 SG 24GB: Underclocked to 1700Mhz 0.750v (375W down to 250W))
Storage	2TB WD SN850 NVME + 1TB Sasmsung 970 Pro NVME + 1TB Intel 6000P NVME USB 3.2
Display(s)	Phillips 32 32M1N5800A (4k144), LG 32" (4K60) \| Gigabyte G32QC (2k165) \| Phillips 328m6fjrmb (2K144)
Case	Fractal Design R6
Audio Device(s)	Logitech G560 \| Corsair Void pro RGB \|Blue Yeti mic
Power Supply	Fractal Ion+ 2 860W (Platinum) (This thing is God-tier. Silent and TINY)
Mouse	Logitech G Pro wireless + Steelseries Prisma XL
Keyboard	Razer Huntsman TE ( Sexy white keycaps)
VR HMD	Oculus Rift S + Quest 2
Software	Windows 11 pro x64 (Yes, it's genuinely a good OS) OpenRGB - ditch the branded bloatware!
Benchmark Scores	Nyooom.

System Name	System V
Processor	AMD Ryzen 5 3600
Motherboard	Asus Prime X570-P
Cooling	Cooler Master Hyper 212 // a bunch of 120 mm Xigmatek 1500 RPM fans (2 ins, 3 outs)
Memory	2x8GB Ballistix Sport LT 3200 MHz (BLS8G4D32AESCK.M8FE) (CL16-18-18-36)
Video Card(s)	Gigabyte AORUS Radeon RX 580 8 GB
Storage	SHFS37A240G / DT01ACA200 / WD20EZRX / MKNSSDTR256GB-3DL / LG BH16NS40 / ST10000VN0008
Display(s)	LG 22MP55 IPS Display
Case	NZXT Source 210
Audio Device(s)	Logitech G430 Headset
Power Supply	Corsair CX650M
Mouse	Microsoft Trackball Optical 1.0
Keyboard	HP Vectra VE keyboard (Part # D4950-63004)
Software	Whatever build of Windows 11 is being served in Dev channel at the time.
Benchmark Scores	Corona 1.3: 3120620 r/s Cinebench R20: 3355 FireStrike: 12490 TimeSpy: 4624

System Name	Sunk Cost Fallacy
Processor	AMD Ryzen 7 7800X3D
Motherboard	ASRock B650E Steel Legend Wifi
Cooling	Arctic Liquid Freezer II 360 Rev. 7
Memory	2x16GB G.Skill Trident Z5 NEO 6000 CL30
Video Card(s)	Sapphire Nitro+ RX 7900 XTX Vapor-X
Storage	WD Black SN850X 1TB + 2x 2TB, 2x 4TB Crucial MX500, 4TB Samsung 870 Evo.
Display(s)	Alienware AW2723DF, LG 27GR93U, LG 27GN950-B
Case	Lian Li O11 Air Mini
Audio Device(s)	Bose Companion Series 2 III, Sennheiser GSP600 and HD599 SE - Creative Soundblaster X4
Power Supply	bequiet! Dark Power Pro 12 1500w Titanium
Mouse	Logitech GPRO X Superlight & G502 X
Keyboard	Corsair K65 RGB Mini, Razer Black Widow V3 TKL
VR HMD	Oculus Rift S

System Name	Chip
Processor	Amd 5600X
Motherboard	MSI B450M Mortar Max
Cooling	Hyper 212
Memory	2x 16g ddr4 3200mz
Video Card(s)	RX 6700
Storage	5.5 tb hd 220 g ssd
Display(s)	Normal moniter
Case	something cheap
VR HMD	Vive

System Name	HELLSTAR
Processor	AMD RYZEN 9 5950X
Motherboard	ASUS Strix X570-E
Cooling	2x 360 + 280 rads. 3x Gentle Typhoons, 3x Phanteks T30, 2x TT T140 . EK-Quantum Momentum Monoblock.
Memory	4x8GB G.SKILL Trident Z RGB F4-4133C19D-16GTZR 14-16-12-30-44
Video Card(s)	Sapphire Pulse RX 7900XTX + under waterblock.
Storage	Optane 900P[W11] + WD BLACK SN850X 4TB + 750 EVO 500GB + 1TB 980PRO[FEDORA]
Display(s)	Philips PHL BDM3270 + Acer XV242Y
Case	Lian Li O11 Dynamic EVO
Audio Device(s)	Sound Blaster ZxR
Power Supply	Fractal Design Newton R3 1000W
Mouse	Razer Basilisk
Keyboard	Razer BlackWidow V3 - Yellow Switch
Software	FEDORA 39 / Windows 11 insider

System Name	4K-gaming
Processor	AMD Ryzen 7 5800X up to 5.05GHz
Motherboard	Gigabyte B550M Aorus Elite
Cooling	Custom loop (CPU+GPU, 240 & 120 rads)
Memory	32GB Kingston HyperX Fury @ DDR4-3466
Video Card(s)	PowerColor RX 6700 XT Fighter OC/UV
Storage	~4TB SSD + 6TB HDD
Display(s)	Acer 27" 4K120 IPS + Lenovo 32" 4K60 IPS
Case	Corsair 4000D Airflow White
Audio Device(s)	Asus TUF H3 Wireless
Power Supply	EVGA Supernova G2 750W
Mouse	Logitech MX518
Keyboard	Roccat Vulcan 121 AIMO
VR HMD	Oculus Rift CV1
Software	Windows 11 Pro
Benchmark Scores	It runs Crysis remastered at 4K

System Name	PCGOD
Processor	AMD FX 8350@ 5.0GHz
Motherboard	Asus TUF 990FX Sabertooth R2 2901 Bios
Cooling	Scythe Ashura, 2×BitFenix 230mm Spectre Pro LED (Blue,Green), 2x BitFenix 140mm Spectre Pro LED
Memory	16 GB Gskill Ripjaws X 2133 (2400 OC, 10-10-12-20-20, 1T, 1.65V)
Video Card(s)	AMD Radeon 290 Sapphire Vapor-X
Storage	Samsung 840 Pro 256GB, WD Velociraptor 1TB
Display(s)	NEC Multisync LCD 1700V (Display Port Adapter)
Case	AeroCool Xpredator Evil Blue Edition
Audio Device(s)	Creative Labs Sound Blaster ZxR
Power Supply	Seasonic 1250 XM2 Series (XP3)
Mouse	Roccat Kone XTD
Keyboard	Roccat Ryos MK Pro
Software	Windows 7 Pro 64

what is going on with my L3 Cache speed 46GB/s instead of over 650GB/s (5800X)

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Windows® 11 Performance Variation in Certain Applications on Compatible AMD Processors​

Issue Description​

Known Performance Changes​

Impact​

Resolution​

Additional Information and Workaround​

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S.T.A.R.S.

Windows® 11 Performance Variation in Certain Applications on Compatible AMD Processors

Issue Description

Known Performance Changes

Impact

Resolution

Additional Information and Workaround