Graphics Cards

[rregorr]

I installed a videocard PowerColor Red Dragon AMD Radeon RX 550 OC, 4GB, GDDR5 - AXRX 550 4GBD5-DHA/OC in my PC, but when I type this command to get its setups in linux: lspci -v -s 01:00.0, I get the wrong values of memory, that it should be 4GB, but instead it, I get 256MB. Could we help me? I use Ubuntu 18.04. The output of the command as root  is below:

fulano@fulano: # lspci -v -s 01:00.0

01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Baffin [Radeon RX 550 640SP / RX 560/560X] (rev ff) (prog-if 00 [VGA controller])
Subsystem: Tul Corporation / PowerColor Baffin [Radeon RX 560]
Flags: bus master, fast devsel, latency 0, IRQ 28
Memory at e0000000 (64-bit, prefetchable) [size=256M] #My videocard has 4GB of memory, not 256MB
Memory at f0000000 (64-bit, prefetchable) [size=2M]
I/O ports at e000 [size=256]
Memory at f7c00000 (32-bit, non-prefetchable) [size=256K]
Expansion ROM at 000c0000 [disabled] [size=128K]
Capabilities: [48] Vendor Specific Information: Len=08 <?>
Capabilities: [50] Power Management version 3
Capabilities: [58] Express Legacy Endpoint, MSI 00
Capabilities: [a0] MSI: Enable+ Count=1/1 Maskable- 64bit+
Capabilities: [100] Vendor Specific Information: ID=0001 Rev=1 Len=010 <?>
Capabilities: [150] Advanced Error Reporting
Capabilities: [200] #15
Capabilities: [270] #19
Capabilities: [2b0] Address Translation Service (ATS)
Capabilities: [2c0] Page Request Interface (PRI)
Capabilities: [2d0] Process Address Space ID (PASID)
Capabilities: [320] Latency Tolerance Reporting
Capabilities: [328] Alternative Routing-ID Interpretation (ARI)
Capabilities: [370] L1 PM Substates
Kernel driver in use: amdgpu
Kernel modules: amdgpu

[rregorr]

u@u:~$ dmesg | grep drm

[ 2.609704] [drm] Memory usable by graphics device = 2048M
[ 2.609706] [drm] Replacing VGA console driver
[ 2.642553] Warning: fail to get symbol drm_fb_helper_release_fbi, replace it with kcl stub
[ 2.670344] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
[ 2.670345] [drm] Driver supports precise vblank timestamp query.
[ 2.676740] [drm] Initialized i915 1.6.0 20171023 for 0000:00:02.0 on minor 0
[ 2.704626] [drm] amdgpu kernel modesetting enabled.
[ 2.704627] [drm] amdgpu version: 5.0.73.19.30
[ 2.704628] [drm] OS DRM version: 4.15.0
[ 2.706235] fb: switching to amdgpudrmfb from EFI VGA
[ 2.706456] [drm] initializing kernel modesetting (POLARIS11 0x1002:0x67AF 0x148C:0x1390 0xFF).
[ 2.706463] [drm] register mmio base: 0xF7CA0000
[ 2.706464] [drm] register mmio size: 262144
[ 2.706468] [drm] add ip block number 0 <vi_common>
[ 2.706469] [drm] add ip block number 1 <gmc_v8_0>
[ 2.706469] [drm] add ip block number 2 <tonga_ih>
[ 2.706470] [drm] add ip block number 3 <gfx_v8_0>
[ 2.706470] [drm] add ip block number 4 <sdma_v3_0>
[ 2.706471] [drm] add ip block number 5 <powerplay>
[ 2.706472] [drm] add ip block number 6 <dm>
[ 2.706472] [drm] add ip block number 7 <uvd_v6_0>
[ 2.706473] [drm] add ip block number 8 <vce_v3_0>
[ 2.706483] [drm] UVD is enabled in VM mode
[ 2.706483] [drm] UVD ENC is enabled in VM mode
[ 2.706485] [drm] VCE enabled in VM mode
[ 2.706793] [drm] RAS INFO: ras initialized successfully, hardware ability[0] ras_mask[0]
[ 2.706796] [drm] vm size is 64 GB, 2 levels, block size is 10-bit, fragment size is 9-bit
[ 2.706831] [drm] Detected VRAM RAM=4096M, BAR=256M
[ 2.706831] [drm] RAM width 128bits GDDR5
[ 2.707109] [drm] amdgpu: 4096M of VRAM memory ready
[ 2.707111] [drm] amdgpu: 7874M of GTT memory ready.
[ 2.707118] [drm] GART: num cpu pages 65536, num gpu pages 65536
[ 2.707613] [drm] PCIE GART of 256M enabled (table at 0x000000F4AA1D5000).
[ 2.707698] [drm] Chained IB support enabled!
[ 2.708638] [drm] Found UVD firmware Version: 1.130 Family ID: 16
[ 2.709439] [drm] Found VCE firmware Version: 53.26 Binary ID: 3
[ 2.710091] [drm] Cannot find any crtc or sizes
[ 2.722086] [drm] Cannot find any crtc or sizes
[ 2.782717] [drm] DM_PPLIB: values for Engine clock
[ 2.782718] [drm] DM_PPLIB: 214000
[ 2.782718] [drm] DM_PPLIB: 335000
[ 2.782718] [drm] DM_PPLIB: 503000
[ 2.782719] [drm] DM_PPLIB: 697000
[ 2.782719] [drm] DM_PPLIB: 874000
[ 2.782719] [drm] DM_PPLIB: 1019000
[ 2.782719] [drm] DM_PPLIB: 1124000
[ 2.782720] [drm] DM_PPLIB: 1190000
[ 2.782720] [drm] DM_PPLIB: Validation clocks:
[ 2.782721] [drm] DM_PPLIB: engine_max_clock: 119000
[ 2.782721] [drm] DM_PPLIB: memory_max_clock: 150000
[ 2.782721] [drm] DM_PPLIB: level : 8
[ 2.782722] [drm] DM_PPLIB: values for Memory clock
[ 2.782722] [drm] DM_PPLIB: 300000
[ 2.782723] [drm] DM_PPLIB: 625000
[ 2.782723] [drm] DM_PPLIB: 1500000
[ 2.782723] [drm] DM_PPLIB: Validation clocks:
[ 2.782724] [drm] DM_PPLIB: engine_max_clock: 119000
[ 2.782724] [drm] DM_PPLIB: memory_max_clock: 150000
[ 2.782724] [drm] DM_PPLIB: level : 8
[ 2.796111] [drm] Display Core initialized with v3.2.42!
[ 2.821784] [drm] Supports vblank timestamp caching Rev 2 (21.10.2013).
[ 2.821784] [drm] Driver supports precise vblank timestamp query.
[ 2.867996] [drm] UVD and UVD ENC initialized successfully.
[ 2.977931] [drm] VCE initialized successfully.
[ 2.979099] [drm] fb mappable at 0xE0785700
[ 2.979099] [drm] vram apper at 0xEA000000
[ 2.979100] [drm] size 4325376
[ 2.979100] [drm] fb depth is 24
[ 2.979101] [drm] pitch is 5632
[ 2.979182] fbcon: amdgpudrmfb (fb0) is primary device
[ 2.979237] amdgpu 0000:01:00.0: fb0: amdgpudrmfb frame buffer device
[ 2.995641] [drm] Initialized amdgpu 3.33.0 20150100 for 000:01:00.0 on minor 1

[rregorr]

And just below:

[ 2.707111] [drm] amdgpu: 7874M of GTT memory ready.

I didn't understand...amdgpu 4096 and amdgpu 7874M???