Newbie question on VRAM and CPU load

  Kernel: 6.1.26-1-MANJARO arch: x86_64 bits: 64 compiler: gcc v: 12.2.1
    parameters: BOOT_IMAGE=/boot/vmlinuz-6.1-x86_64
    root=UUID=a28effd1-1c29-4e88-85c2-f55b97bdbe05 rw quiet splash
    udev.log_priority=3
  Desktop: KDE Plasma v: 5.27.4 tk: Qt v: 5.15.9 wm: kwin_x11 vt: 1 dm: SDDM
    Distro: Manjaro Linux base: Arch Linux
Machine:
  Type: Desktop Mobo: ASUSTeK model: TUF Z270 MARK 1 v: Rev 1.xx
    serial: <superuser required> UEFI: American Megatrends v: 1501
    date: 07/13/2021
Battery:
  Device-1: hidpp_battery_0 model: Logitech Wireless Keyboard serial: <filter>
    charge: 55% (should be ignored) rechargeable: yes status: discharging
Memory:
  System RAM: available: 15.56 GiB used: 2.56 GiB (16.4%)
  RAM Report: permissions: Unable to run dmidecode. Root privileges required.
CPU:
  Info: model: Intel Core i7-7700 bits: 64 type: MT MCP arch: Kaby Lake
    gen: core 7 level: v3 note: check built: 2018 process: Intel 14nm family: 6
    model-id: 0x9E (158) stepping: 9 microcode: 0xF0
  Topology: cpus: 1x cores: 4 tpc: 2 threads: 8 smt: enabled cache:
    L1: 256 KiB desc: d-4x32 KiB; i-4x32 KiB L2: 1024 KiB desc: 4x256 KiB
    L3: 8 MiB desc: 1x8 MiB
  Speed (MHz): avg: 2900 high: 3600 min/max: 800/4200 scaling:
    driver: intel_pstate governor: powersave cores: 1: 3600 2: 3600 3: 3600
    4: 3600 5: 3600 6: 800 7: 3600 8: 800 bogomips: 57616
  Flags: 3dnowprefetch abm acpi adx aes aperfmperf apic arat
    arch_capabilities arch_perfmon art avx avx2 bmi1 bmi2 bts clflush
    clflushopt cmov constant_tsc cpuid cpuid_fault cx16 cx8 de ds_cpl dtes64
    dtherm dts epb erms est f16c flush_l1d fma fpu fsgsbase fxsr ht hwp
    hwp_act_window hwp_epp hwp_notify ibpb ibrs ida intel_pt invpcid
    invpcid_single lahf_lm lm mca mce md_clear mmx monitor movbe mpx msr mtrr
    nonstop_tsc nopl nx pae pat pbe pcid pclmulqdq pdcm pdpe1gb pebs pge pln
    pni popcnt pse pse36 pti pts rdrand rdseed rdtscp rep_good sdbg sep smap
    smep smx ss ssbd sse sse2 sse4_1 sse4_2 ssse3 stibp syscall tm tm2 tsc
    tsc_adjust tsc_deadline_timer vme x2apic xgetbv1 xsave xsavec xsaveopt
    xsaves xtopology xtpr
  Vulnerabilities:
  Type: itlb_multihit status: KVM: VMX unsupported
  Type: l1tf mitigation: PTE Inversion
  Type: mds mitigation: Clear CPU buffers; SMT vulnerable
  Type: meltdown mitigation: PTI
  Type: mmio_stale_data mitigation: Clear CPU buffers; SMT vulnerable
  Type: retbleed mitigation: IBRS
  Type: spec_store_bypass mitigation: Speculative Store Bypass disabled via
    prctl
  Type: spectre_v1 mitigation: usercopy/swapgs barriers and __user pointer
    sanitization
  Type: spectre_v2 mitigation: IBRS, IBPB: conditional, STIBP: conditional,
    RSB filling, PBRSB-eIBRS: Not affected
  Type: srbds mitigation: Microcode
  Type: tsx_async_abort mitigation: TSX disabled
Graphics:
  Device-1: NVIDIA GM107 [GeForce GTX 750 Ti] vendor: eVga.com. driver: nvidia
    v: 530.41.03 alternate: nouveau,nvidia_drm non-free: 530.xx+
    status: current (as of 2023-05) arch: Maxwell code: GMxxx
    process: TSMC 28nm built: 2014-19 pcie: gen: 3 speed: 8 GT/s lanes: 2
    link-max: lanes: 16 bus-ID: 01:00.0 chip-ID: 10de:1380 class-ID: 0300
  Display: x11 server: X.Org v: 21.1.8 compositor: kwin_x11 driver: X:
    loaded: nvidia gpu: nvidia display-ID: :0 screens: 1
  Screen-1: 0 s-res: 3840x1080 s-dpi: 92 s-size: 1060x301mm (41.73x11.85")
    s-diag: 1102mm (43.38") monitors: <missing: xrandr>
  API: OpenGL v: 4.6.0 NVIDIA 530.41.03 renderer: NVIDIA GeForce GTX 750
    Ti/PCIe/SSE2 direct-render: Yes
Audio:
  Device-1: Intel 200 Series PCH HD Audio vendor: ASUSTeK driver: snd_hda_intel
    v: kernel bus-ID: 00:1f.3 chip-ID: 8086:a2f0 class-ID: 0403
  Device-2: NVIDIA GM107 High Definition Audio [GeForce 940MX]
    vendor: eVga.com. driver: snd_hda_intel v: kernel pcie: gen: 3 speed: 8 GT/s
    lanes: 2 link-max: lanes: 16 bus-ID: 01:00.1 chip-ID: 10de:0fbc
    class-ID: 0403
  API: ALSA v: k6.1.26-1-MANJARO status: kernel-api with: aoss
    type: oss-emulator tools: alsactl,alsamixer,amixer
  Server-1: JACK v: 1.9.22 status: off tools: N/A
  Server-2: PipeWire v: 0.3.70 status: active with: 1: pipewire-pulse
    status: active 2: wireplumber status: active 3: pipewire-alsa type: plugin
    tools: pactl,pw-cat,pw-cli,wpctl
Network:
  Device-1: Intel Ethernet I219-V vendor: ASUSTeK driver: e1000e v: kernel
    port: N/A bus-ID: 00:1f.6 chip-ID: 8086:15b8 class-ID: 0200
  IF: enp0s31f6 state: down mac: <filter>
  Device-2: Intel I211 Gigabit Network vendor: ASUSTeK driver: igb v: kernel
    pcie: gen: 1 speed: 2.5 GT/s lanes: 1 port: d000 bus-ID: 04:00.0
    chip-ID: 8086:1539 class-ID: 0200
  IF: enp4s0 state: up speed: 1000 Mbps duplex: full mac: <filter>
  IP v4: <filter> type: dynamic noprefixroute scope: global
    broadcast: <filter>
  IP v6: <filter> type: dynamic noprefixroute scope: global
  IP v6: <filter> type: noprefixroute scope: link
  WAN IP: <filter>
Bluetooth:
  Message: No bluetooth data found.
Logical:
  Message: No logical block device data found.
RAID:
  Message: No RAID data found.
Drives:
  Local Storage: total: 3.19 TiB used: 493.42 GiB (15.1%)
  SMART Message: Unable to run smartctl. Root privileges required.
  ID-1: /dev/nvme0n1 maj-min: 259:0 vendor: Samsung
    model: SSD 970 EVO Plus 1TB size: 931.51 GiB block-size: physical: 512 B
    logical: 512 B speed: 31.6 Gb/s lanes: 4 tech: SSD serial: <filter>
    fw-rev: 4B2QEXM7 temp: 28.9 C scheme: GPT
  ID-2: /dev/nvme1n1 maj-min: 259:3 vendor: Samsung model: MZVLQ512HALU-000H1
    size: 476.94 GiB block-size: physical: 512 B logical: 512 B speed: 31.6 Gb/s
    lanes: 4 tech: SSD serial: <filter> fw-rev: HPS4NFXV temp: 30.9 C
    scheme: GPT
  ID-3: /dev/sda maj-min: 8:0 vendor: Toshiba model: DT01ACA200
    size: 1.82 TiB block-size: physical: 4096 B logical: 512 B speed: 6.0 Gb/s
    tech: HDD rpm: 7200 serial: <filter> fw-rev: ABB0 scheme: GPT
  Message: No optical or floppy data found.
Partition:
  ID-1: / raw-size: 931.22 GiB size: 915.53 GiB (98.32%)
    used: 493.42 GiB (53.9%) fs: ext4 dev: /dev/nvme0n1p2 maj-min: 259:2
    label: N/A uuid: a28effd1-1c29-4e88-85c2-f55b97bdbe05
  ID-2: /boot/efi raw-size: 300 MiB size: 299.4 MiB (99.80%)
    used: 316 KiB (0.1%) fs: vfat dev: /dev/nvme0n1p1 maj-min: 259:1 label: N/A
    uuid: 30DD-5CFD
Swap:
  Alert: No swap data was found.
Unmounted:
  ID-1: /dev/nvme1n1p1 maj-min: 259:4 size: 100 MiB fs: vfat label: N/A
    uuid: 1029-6F1F
  ID-2: /dev/nvme1n1p2 maj-min: 259:5 size: 16 MiB fs: <superuser required>
    label: N/A uuid: N/A
  ID-3: /dev/nvme1n1p3 maj-min: 259:6 size: 476.33 GiB fs: ntfs label: N/A
    uuid: 26862A58862A292F
  ID-4: /dev/nvme1n1p4 maj-min: 259:7 size: 509 MiB fs: ntfs label: N/A
    uuid: FED03778D037366D
  ID-5: /dev/sda1 maj-min: 8:1 size: 300 MiB fs: vfat label: NO_LABEL
    uuid: C078-6B2B
  ID-6: /dev/sda2 maj-min: 8:2 size: 914.09 GiB fs: ext4 label: N/A
    uuid: 5cb8ecf5-1791-4b9b-b1d6-e141ad34a8d1
  ID-7: /dev/sda3 maj-min: 8:3 size: 17.12 GiB fs: swap label: swap
    uuid: b8119075-eb6a-474d-b2e9-917b34e8e924
USB:
  Hub-1: 1-0:1 info: hi-speed hub with single TT ports: 16 rev: 2.0
    speed: 480 Mb/s (57.2 MiB/s) lanes: 1 mode: 2.0 chip-ID: 1d6b:0002
    class-ID: 0900
  Device-1: 1-14:2 info: Logitech Unifying Receiver type: keyboard,mouse
    driver: logitech-djreceiver,usbhid interfaces: 2 rev: 2.0
    speed: 12 Mb/s (1.4 MiB/s) lanes: 1 mode: 1.1 power: 98mA
    chip-ID: 046d:c534 class-ID: 0301
  Hub-2: 2-0:1 info: super-speed hub ports: 10 rev: 3.0
    speed: 5 Gb/s (596.0 MiB/s) lanes: 1 mode: 3.2 gen-1x1 chip-ID: 1d6b:0003
    class-ID: 0900
  Hub-3: 3-0:1 info: hi-speed hub with single TT ports: 2 rev: 2.0
    speed: 480 Mb/s (57.2 MiB/s) lanes: 1 mode: 2.0 chip-ID: 1d6b:0002
    class-ID: 0900
  Hub-4: 4-0:1 info: super-speed hub ports: 2 rev: 3.1
    speed: 10 Gb/s (1.16 GiB/s) lanes: 1 mode: 3.2 gen-2x1 chip-ID: 1d6b:0003
    class-ID: 0900
Sensors:
  System Temperatures: cpu: 32.0 C mobo: N/A gpu: nvidia temp: 31 C
  Fan Speeds (RPM): N/A gpu: nvidia fan: 40%
Info:
  Processes: 211 Uptime: 8m wakeups: 3 Init: systemd v: 252 default: graphical
  tool: systemctl Compilers: gcc: 12.2.1 clang: 15.0.7 Packages: 1295
  pm: pacman pkgs: 1294 libs: 380 tools: pamac pm: flatpak pkgs: 1 Shell: Zsh
  v: 5.9 default: Bash v: 5.1.16 running-in: yakuake inxi: 3.3.27
    ~                                    

Thanks all of you for the information and suggestions. First time I have used the back ticks here I hope this works as designed, thats a lot of info.

running vainfo fails with error code 1 unknown libva error and exits on that
vdpauinfo yields much of which I do not understand so

vdpauinfo                                                                                                                                                                                127 ✘  15s  
display: :0   screen: 0
API version: 1
Information string: NVIDIA VDPAU Driver Shared Library  530.41.03  Thu Mar 16 19:21:47 UTC 2023

Video surface:

name   width height types
-------------------------------------------
420     4096  4096  NV12 YV12 
422     4096  4096  UYVY YUYV 
444     4096  4096  NV24 YV24 
420_16  4096  4096  P010 P016 
422_16  4096  4096  UYVY YUYV 
444_16  4096  4096  Y_U_V_444_16 

Decoder capabilities:

name                        level macbs width height
----------------------------------------------------
MPEG1                           0 65536  4080  4080
MPEG2_SIMPLE                    3 65536  4080  4080
MPEG2_MAIN                      3 65536  4080  4080
H264_BASELINE                  51 65536  4096  4096
H264_MAIN                      51 65536  4096  4096
H264_HIGH                      51 65536  4096  4096
VC1_SIMPLE                      1  8190  2048  2048
VC1_MAIN                        2  8190  2048  2048
VC1_ADVANCED                    4  8190  2048  2048
MPEG4_PART2_SP                  3  8192  2048  2048
MPEG4_PART2_ASP                 5  8192  2048  2048
DIVX4_QMOBILE                   0  8192  2048  2048
DIVX4_MOBILE                    0  8192  2048  2048
DIVX4_HOME_THEATER              0  8192  2048  2048
DIVX4_HD_1080P                  0  8192  2048  2048
DIVX5_QMOBILE                   0  8192  2048  2048
DIVX5_MOBILE                    0  8192  2048  2048
DIVX5_HOME_THEATER              0  8192  2048  2048
DIVX5_HD_1080P                  0  8192  2048  2048
H264_CONSTRAINED_BASELINE      51 65536  4096  4096
H264_EXTENDED                  51 65536  4096  4096
H264_PROGRESSIVE_HIGH          51 65536  4096  4096
H264_CONSTRAINED_HIGH          51 65536  4096  4096
H264_HIGH_444_PREDICTIVE       51 65536  4096  4096
VP9_PROFILE_0                  --- not supported ---
VP9_PROFILE_1                  --- not supported ---
VP9_PROFILE_2                  --- not supported ---
VP9_PROFILE_3                  --- not supported ---
HEVC_MAIN                      --- not supported ---
HEVC_MAIN_10                   --- not supported ---
HEVC_MAIN_STILL                --- not supported ---
HEVC_MAIN_12                   --- not supported ---
HEVC_MAIN_444                  --- not supported ---
HEVC_MAIN_444_10               --- not supported ---
HEVC_MAIN_444_12               --- not supported ---
AV1_MAIN                       --- not supported ---
AV1_HIGH                       --- not supported ---
AV1_PROFESSIONAL               --- not supported ---

Output surface:

name              width height nat types
----------------------------------------------------
B8G8R8A8         16384 16384    y  Y8U8V8A8 V8U8Y8A8 A4I4 I4A4 A8I8 I8A8 
R10G10B10A2      16384 16384    y  Y8U8V8A8 V8U8Y8A8 A4I4 I4A4 A8I8 I8A8 

Bitmap surface:

name              width height
------------------------------
B8G8R8A8         16384 16384
R8G8B8A8         16384 16384
R10G10B10A2      16384 16384
B10G10R10A2      16384 16384
A8               16384 16384

Video mixer:

feature name                    sup
------------------------------------
DEINTERLACE_TEMPORAL             y
DEINTERLACE_TEMPORAL_SPATIAL     y
INVERSE_TELECINE                 y
NOISE_REDUCTION                  y
SHARPNESS                        y
LUMA_KEY                         y
HIGH QUALITY SCALING - L1        y
HIGH QUALITY SCALING - L2        -
HIGH QUALITY SCALING - L3        -
HIGH QUALITY SCALING - L4        -
HIGH QUALITY SCALING - L5        -
HIGH QUALITY SCALING - L6        -
HIGH QUALITY SCALING - L7        -
HIGH QUALITY SCALING - L8        -
HIGH QUALITY SCALING - L9        -

parameter name                  sup      min      max
-----------------------------------------------------
VIDEO_SURFACE_WIDTH              y         1     4096
VIDEO_SURFACE_HEIGHT             y         1     4096
CHROMA_TYPE                      y  
LAYERS                           y         0        4

attribute name                  sup      min      max
-----------------------------------------------------
BACKGROUND_COLOR                 y  
CSC_MATRIX                       y  
NOISE_REDUCTION_LEVEL            y      0.00     1.00
SHARPNESS_LEVEL                  y     -1.00     1.00
LUMA_KEY_MIN_LUMA                y  
LUMA_KEY_MAX_LUMA                y  

Note the following info–

# grep -iE 'vdpau | dri driver' xorg_log_file
grep: xorg_log_file: No such file or directory

also this

[Manjouno carr]# grep -iE 'vdpau | dri driver' xorg_log_file
grep: xorg_log_file: No such file or directory
[Manjouno carr]# sha1sum /usr/lib/dri/* | sort
1c9fad641547672ad6fa3f6ca1be9b03c2e18ed5  /usr/lib/dri/crocus_dri.so
1c9fad641547672ad6fa3f6ca1be9b03c2e18ed5  /usr/lib/dri/d3d12_dri.so
1c9fad641547672ad6fa3f6ca1be9b03c2e18ed5  /usr/lib/dri/i915_dri.so
1c9fad641547672ad6fa3f6ca1be9b03c2e18ed5  /usr/lib/dri/iris_dri.so
1c9fad641547672ad6fa3f6ca1be9b03c2e18ed5  /usr/lib/dri/kms_swrast_dri.so
1c9fad641547672ad6fa3f6ca1be9b03c2e18ed5  /usr/lib/dri/nouveau_dri.so
1c9fad641547672ad6fa3f6ca1be9b03c2e18ed5  /usr/lib/dri/r300_dri.so
1c9fad641547672ad6fa3f6ca1be9b03c2e18ed5  /usr/lib/dri/r600_dri.so
1c9fad641547672ad6fa3f6ca1be9b03c2e18ed5  /usr/lib/dri/radeonsi_dri.so
1c9fad641547672ad6fa3f6ca1be9b03c2e18ed5  /usr/lib/dri/swrast_dri.so
1c9fad641547672ad6fa3f6ca1be9b03c2e18ed5  /usr/lib/dri/virtio_gpu_dri.so
1c9fad641547672ad6fa3f6ca1be9b03c2e18ed5  /usr/lib/dri/vmwgfx_dri.so
1c9fad641547672ad6fa3f6ca1be9b03c2e18ed5  /usr/lib/dri/zink_dri.so
2149b00774b601b217f33c33cb5c2a338e6f32cc  /usr/lib/dri/nvidia_drv_video.so
2149b00774b601b217f33c33cb5c2a338e6f32cc  /usr/lib/dri/s3g_drv_video.so
2149b00774b601b217f33c33cb5c2a338e6f32cc  /usr/lib/dri/vdpau_drv_video.so
387c7f146333240993b2ffe45994d28c5b477c42  /usr/lib/dri/i965_drv_video.so
f641be8ea3afb13454ef41530e729a1d82723660  /usr/lib/dri/d3d12_drv_video.so
f641be8ea3afb13454ef41530e729a1d82723660  /usr/lib/dri/nouveau_drv_video.so
f641be8ea3afb13454ef41530e729a1d82723660  /usr/lib/dri/r600_drv_video.so
f641be8ea3afb13454ef41530e729a1d82723660  /usr/lib/dri/radeonsi_drv_video.so
f641be8ea3afb13454ef41530e729a1d82723660  /usr/lib/dri/virtio_gpu_drv_video.so

thanks cscs for the pointer to the Arch wiki.

Moderator edit: In the future, please use proper formatting: [HowTo] Post command output and file content as formatted text