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Gen4 NVMe Speed Drop with Ryzen 9 5900X and MPG B550 very weird problem that i can't seem to fix

abmkf
By abmkf
in Storage Devices
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Windows : Microsoft Windows 11 Pro
GPU: RTX 3080 FE
CPU: AMD Ryzen 9 5900X 12-Core Processor, 3701 Mhz, 12 Core(s), 24 Logical Processor(s)
Motherboard: MPG B550 GAMING PLUS (MS-7C56)
PSU: Corsair RM850x shift
After upgrading from a Ryzen 5 3600 to the Ryzen 9 5900X, everything was functioning well until recently. I have a "Samsung SSD 990 PRO with Heatsink 2TB," a Gen4 NVMe drive, which suddenly experienced a significant drop in both read and write speeds, reaching around 10MB/s on seq read, and 4MB/s on seq write when connected to the Gen4 slot. However, when I moved the drive to the Gen3 [MT2_2]slot, it worked perfectly. Reaching around 3131 MB/s on seq read, and 3078 MB/s on seq write. [Samsung magician 1GB 6 times Full performance mode on both]
To troubleshoot, I tested another Gen3 NVMe [CT1000P3SSD8 1000.2 GB] drive in the Gen4 slot[MT2_1], and it operated without any issues at gen3 speeds. This suggests that the Gen4 slot may be encountering difficulties operating at Gen4x4 speeds. I'm seeking assistance in understanding why this might be happening and how to resolve the issue, as it has consumed a significant amount of my time. Speed of the drive in that slot is 3594 MB/s seq read, and 1166 seq write [Samsung magician 1GB 5 times ]
Crystal disk mark [Crucial P3 gen3x4 speeds]:
seq read[1MiB 8 queues] 3676MB/s seq write[1MiB 8 queues] 3247MB/s
Crystal disk mark [Samsung 990 pro gen3x4 speeds]:
seq read[1MiB 8 queues] 3264MB/s seq write[1MiB 8 queues] 3157MB/s
Please help as i don't understand what exactly can be the problem.

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4 minutes ago, abmkf said:

Windows : Microsoft Windows 11 Pro
GPU: RTX 3080 FE
CPU: AMD Ryzen 9 5900X 12-Core Processor, 3701 Mhz, 12 Core(s), 24 Logical Processor(s)
Motherboard: MPG B550 GAMING PLUS (MS-7C56)
PSU: Corsair RM850x shift
After upgrading from a Ryzen 5 3600 to the Ryzen 9 5900X, everything was functioning well until recently. I have a "Samsung SSD 990 PRO with Heatsink 2TB," a Gen4 NVMe drive, which suddenly experienced a significant drop in both read and write speeds, reaching around 10MB/s on seq read, and 4MB/s on seq write when connected to the Gen4 slot. However, when I moved the drive to the Gen3 [MT2_2]slot, it worked perfectly. Reaching around 3131 MB/s on seq read, and 3078 MB/s on seq write. [Samsung magician 1GB 6 times Full performance mode on both]
To troubleshoot, I tested another Gen3 NVMe [CT1000P3SSD8 1000.2 GB] drive in the Gen4 slot[MT2_1], and it operated without any issues at gen3 speeds. This suggests that the Gen4 slot may be encountering difficulties operating at Gen4x4 speeds. I'm seeking assistance in understanding why this might be happening and how to resolve the issue, as it has consumed a significant amount of my time. Speed of the drive in that slot is 3594 MB/s seq read, and 1166 seq write [Samsung magician 1GB 5 times ]
Crystal disk mark [Crucial P3 gen3x4 speeds]:
seq read[1MiB 8 queues] 3676MB/s seq write[1MiB 8 queues] 3247MB/s
Crystal disk mark [Samsung 990 pro gen3x4 speeds]:
seq read[1MiB 8 queues] 3264MB/s seq write[1MiB 8 queues] 3157MB/s
Please help as i don't understand what exactly can be the problem.

Latest Bios? Latest Chipset drivers? SSD-s flashed with the latest firmware(s), trimmed (optimized) and enough free space?

M.S.C.E. (M.Sc. Computer Engineering), IT specialist in a hospital, 30+ years of gaming, 20+ years of computer enthusiasm, Geek, Trekkie, anime fan

  • Main PC: AMD Ryzen 7 5800X3D - EK AIO 360 D-RGB - Arctic Cooling MX-4 - Asus Prime X570-P - 4x8GB DDR4 3200 HyperX Fury CL16 - Sapphire AMD Radeon 6950XT Nitro+ - 1TB Kingston Fury Renegade - 2TB Kingston Fury Renegade - 512GB ADATA SU800 - 960GB Kingston A400 - Seasonic PX-850 850W  - custom black ATX and EPS cables - Fractal Design Define R5 Blackout - Windows 11 x64 23H2 - 3 Arctic Cooling P14 PWM PST - 5 Arctic Cooling P12 PWM PST
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3 hours ago, 191x7 said:

Latest Bios? Latest Chipset drivers? SSD-s flashed with the latest firmware(s), trimmed (optimized) and enough free space?

Latest Bios : yes
Latest Chipset drivers : yes
Latest SSD firmaware : yes
Enough free space : yes around 1TB
Trimmed and optimized

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Howlong was it running properly after the upgrade, were there any other changes before the problem started? even new softwear or updates

                          Ryzen 5800X3D(Because who doesn't like a phat stack of cache?) GPU - 7700Xt

                                                           X470 Strix f gaming, 32GB Corsair vengeance, WD Blue 500GB NVME-WD Blue2TB HDD, 700watts EVGA Br

 ~Extra L3 cache is exciting, every time you load up a new game or program you never know what your going to get, will it perform like a 5700x or are we beating the 14900k today? 😅~

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1 minute ago, Ripred said:

Howlong was it running properly after the upgrade, were there any other changes before the problem started? even new softwear or updates

5~4 days i upgraded quite recently but it worked normally these 5 days.

No drivers/software/updates were installed in that period.

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are you still using the same xmp profile/ram,OC settings in bios after upgrading? and on that note, what do you have for RAM? have your also tried to reseat those or take out individual sticks and see if the behavior changes? sometime certain hardware just dont like eachother

                          Ryzen 5800X3D(Because who doesn't like a phat stack of cache?) GPU - 7700Xt

                                                           X470 Strix f gaming, 32GB Corsair vengeance, WD Blue 500GB NVME-WD Blue2TB HDD, 700watts EVGA Br

 ~Extra L3 cache is exciting, every time you load up a new game or program you never know what your going to get, will it perform like a 5700x or are we beating the 14900k today? 😅~

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20 minutes ago, Ripred said:

are you still using the same xmp profile/ram,OC settings in bios after upgrading? and on that note, what do you have for RAM? have your also tried to reseat those or take out individual sticks and see if the behavior changes? sometime certain hardware just dont like eachother

XMP profile/ ram / OC settings the same
2x kingston fury beast 16gb 3200
2x crucial 8gb 3200

I just did what you recommended, i removed all but 1 ram, no luck i also removed the 2nd nvme drive and transferred the gpu the 2nd slot, also no luck

speeds hover around 800MB/s seq read and 6MB/s seq write right now at PCIe gen4x4 with 990 pro attached to the slot

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This looks like classic signaling problems on higher gen PCIe speeds.

you can give us screenshot from crystaldiskinfo with all smart data of it. 

 

1. Resit the M.2 and do check if no any dirt on the connectors. 
if it not help.

2. Resit the CPU cooler ( bad mounting can do weird things )

if it not help 

3. Resit the cpu and do check the LGA pins for defects ( bad pin contact can do weird things )

 

if this don’t help, RMA the motherboard. 
 

   
 
 
 
Spoiler
CPU : Intel 14gen i7-14700K
COOLER :  Thermalright Peerless Assassin 120 White + thermaltake toughfan 12 white + Thermal Grizzly - CPU Contact Frame Intel 13./14. +  Coollaboratory Liquid Ultra
GPU : MSI RTX 2070 Armor @GPU 2050MHz Mem 8200MHz -> USB C 10Gb/s cable 2m -> Unitek 4x USB HUB 10 Gb/s (Y-HB08003)
MOBO : MSI MEG Z690 UNIFY
RAM :  Corsair VENGEANCE DDR5 RAM 64 GB (2 x 32 GB) 6400 MHz CL32 (CMK64GX5M2B6400C32)
SSD : Intel Optane 905P 960GB U.2 (OS) + 2 x WD SN850X 4TB + 2 x PNY CS3140 2TB + ASM2824 PCIe switch -> 4 x Plextor M8PeG 1TB + flexiDOCK MB014SP-B -> Crucial MX500 2TB + GoodRam Iridium PRO 960GB + Samsung 850 Pro 512GB
HDD : WD White 18TB WD180EDFZ + SATA port multiplier adp6st0-j05 (JMB575) ->  WD Gold 8TB WD8002FRYZ + WD Gold 4TB WD4002FYYZ + WD Red PRO 4TB WD4001FFSX + WD Green 2TB WD20EARS
EXTERNAL
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MIC :  Tonor TC30 -> Mozos SB38
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13 hours ago, abmkf said:

XMP profile/ ram / OC settings the same
2x kingston fury beast 16gb 3200
2x crucial 8gb 3200

I just did what you recommended, i removed all but 1 ram, no luck i also removed the 2nd nvme drive and transferred the gpu the 2nd slot, also no luck

speeds hover around 800MB/s seq read and 6MB/s seq write right now at PCIe gen4x4 with 990 pro attached to the slot

Just for kicks I would try disabling the xmp, basically set the bios to default and try that, like I mentioned before some hardware don't like each other, meaning an OC or xmp profile that worked for one config might be unstable in a different configuration, I also agree with koko and try to re-seat everything, sometimes switching out hardware can jostle other parts just enough to make issues, I had a similar problem with an m.2 SSD

                          Ryzen 5800X3D(Because who doesn't like a phat stack of cache?) GPU - 7700Xt

                                                           X470 Strix f gaming, 32GB Corsair vengeance, WD Blue 500GB NVME-WD Blue2TB HDD, 700watts EVGA Br

 ~Extra L3 cache is exciting, every time you load up a new game or program you never know what your going to get, will it perform like a 5700x or are we beating the 14900k today? 😅~

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