Video Memory
Ray Parrish
crp at cmc.net
Sat Feb 28 23:58:39 UTC 2009
Lucio M Nicolosi wrote:
>> Well, I'm pretty sure it has at least 128 MB's of RAM. I just ran lspci
>> and it reports the following. I've added a couple of blank lines to make
>> it easier to find the lines with the RAM listings.
>>
>> 00:05.0 VGA compatible controller [0300]: nVidia Corporation C51G
>> [GeForce 6100] [10de:0242] (rev a2) (prog-if 00 [VGA controller])
>> Subsystem: FIRST INTERNATIONAL Computer Inc Unknown device [1509:6006]
>> Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
>> Stepping- SERR- FastB2B-
>> Status: Cap+ 66MHz+ UDF- FastB2B+ ParErr- DEVSEL=fast >TAbort-
>> <TAbort- <MAbort- >SERR- <PERR-
>> Latency: 0
>> Interrupt: pin A routed to IRQ 20
>>
>> Region 0: Memory at fb000000 (32-bit, non-prefetchable) [size=16M]
>> Region 1: Memory at d0000000 (64-bit, prefetchable) [size=256M]
>> Region 3: Memory at fc000000 (64-bit, non-prefetchable) [size=16M]
>> [virtual] Expansion ROM at 30000000 [disabled] [size=128K]
>>
>> Capabilities: [48] Power Management version 2
>> Flags: PMEClk- DSI- D1- D2- AuxCurrent=0mA
>> PME(D0-,D1-,D2-,D3hot-,D3cold-)
>> Status: D0 PME-Enable- DSel=0 DScale=0 PME-
>> Capabilities: [50] Message Signalled Interrupts: Mask- 64bit+
>> Queue=0/0 Enable-
>> Address: 0000000000000000 Data: 0000
>>
>> Once more the claim is made by a program that it is using 256 MB's of
>> RAM, and this time also an additional 32 MB's along with it, and a 128
>> KB ROM to boot! Oh well, it doesn't seem to be slowing me down any.
>>
>> Later, Ray Parrish
>>
>
> Please correct me if I'm wrong, seems your video board has indeed a
> resident memory of 256Mb, and requires at least another 128 Mb (RAM
> memory) for managing, thus leaving 384Mb of free RAM. (?)
>
> L.
>
Well , unless someone snuck into my house, and installed some extra RAM
in my computer that I haven't noticed yet, the video card using 256 MB's
of RAM only leaves my main RAM with the other half of the 512 MB's in my
machine which is 256 MB's as well. Of course I do have a one GB swap
file in use as well, so maybe I am running with only 256 MB's available
to the cpu.
No, that can't be right, because if I run the free command, it reports
384 MB's of total physical RAM available to the system, plus the swap
file. I just think *something* is fooling all of these other programs
into reporting 256 MB's for the video card, and it's really only running
128 MB's.
Here's the output of the free command.
ray at ray-desktop:~$ free -m
total used free shared buffers cached
Mem: 375 366 9 0 0 51
-/+ buffers/cache: 314 60
Swap: 1023 501 522
Here's another little oddity. This is what lspci reports for my cpu --
Advanced Micro Devices [AMD] K8 [Athlon64/Opteron]
And I know that I have an AMD Sempron 3400+ in this machine. Yep, I just
fired up Sysinfo from the System Tools menu, and it reports this -- AMD
Sempron(tm) Processor 3400+ I don't think lspci is working very well.
Later, Ray Parrish
--
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