Difference in Total VRAM available for different Sparks

Accelerated Computing DGX Spark / GB10 User Forum DGX Spark / GB10
1

I have two Sparks. One is MSI Edge Expert. The other one is the Gigabyte one. MSI Edge Expert shows 121.7 GiB available while Gigagbyte has 119.7 GiB
Is this normal? What do you guys get on NVIDIA boxes?
I want to get the Qwen 3.5 279B model working. And I think that one needs all the Vita one can get.

Also, Gigabyte, I had to resize the NVMe partition, out of box it had only made 625 GiB available for some reason. I had to grow the partition to be able to use the whole space.
So much weird bugs in these boxes.

Thanks!

2

There’s a BIOS update available that frees up 2GB. It’s available for the Spark and MSI, but maybe it hasn’t been released for the Gigabyte yet?

sudo fwupdmgr refresh
sudo fwupdmgr get-updates

to see if there’s an update available.

3

Thanks, these commands, I said that there’s no updates.
there were some updates this morning in the dashboard. I did those. Still two gig difference.

4

Have you fix this issue? It is quite critical to run qwen3.5 397B int-autoround without this 2GB memory.

5

Nope, gigabyte is still 2Gb less available ram.

I have checked after every update and no change so far. Probably needs a firmware update from them, I even contacted the black hole of their customer support a week age and no response. So basically can’t recommend gigabyte atom dgx, msi edge expert seems to be the optimal model so far. From what I understand seeing here on forums asus might be similar to gigabyte.

6

I can confirm it seems to be the same case with the HP ZGX Nano G1n:

zgx-spark:~$ sudo dmidecode -t system | grep -A3 "System Information" ; free -g
System Information
        Manufacturer: HP
        Product Name: HP ZGX Nano G1n AI Station
        Version: A.7
               total        used        free      shared  buff/cache   available
Mem:             119          94           0           1          26          24
Swap:             15           0          15

vs the FE DGX Spark:

dgx-spark:~$ sudo dmidecode -t system | grep -A3 "System Information"; free -g
System Information
        Manufacturer: NVIDIA
        Product Name: NVIDIA_DGX_Spark
        Version: A.7
               total        used        free      shared  buff/cache   available
Mem:             121         100           2           1          22          21
Swap:             15           0          15

(check the totalcolum, and ignore the used one, as I have some models running).

Both have been updated regularly, and no change in the total memory listed in the HP ZGX even after power-cycling.

It hasn’t impacted my workflows, but it’s still a little annoying.

7

I have one spark and one gigabyte atom. that missing 2GB, I think is the reason that I can’t run 397B int4-autoround with vllm. But I can run the model of gptq-int4 on sglang, so far my speed is 14 t/s, I just can’t increase the performance with triton backend. the quality of 397B is much better compare with 122B on a single spark.

8

sudo dmidecode -t system | grep -A3 “System Information” ; free -g Can someone with an Asus GX 10 run this command? I’m thinking of buying this model but I’d like to know its memory specifications. Here are the Dell and Lenovo options.

sudo dmidecode -t system | grep -A3 "System Information" ; free -g
System Information
	Manufacturer: LENOVO
	Product Name: 30KL0004FC
	Version: ThinkStation PGX
               total       usado       libre  compartido   búf/caché  disponible
Mem:             121         117           1           0           3           4
Inter:            15           3          12
sudo dmidecode -t system | grep -A3 "System Information" ; free -g
System Information
	Manufacturer: Dell  Inc.
	Product Name: Dell Pro Max with GB10 FCM1253
	Version:  
               total       usado       libre  compartido   búf/caché  disponible
Mem:             121          46          40           0          35          74
Inter:            15           0          15
9 
           총계         사용        여분      공유    버퍼/캐시    가용

메모리: 121 102 2 0 18 19
스 왑: 15 7 8

Please understand that the interface is in Korean. :)

On my Asus GX 10, it shows as 121. What’s interesting is that I’m fairly certain it used to be 119 in the past. It’s possible that a recent BIOS update might have had an effect on this.

10

Sure… from Asus GX 10:

System Information
        Manufacturer: ASUSTeK COMPUTER INC.
        Product Name: GX10
        Version: 5.36_GX10DGX
               total        used        free      shared  buff/cache   available
Mem:             121         114           0           0           7           7
Swap:             15           0          15
11

@ska0982 @Robrobbes2 thank you so much

12

And bios update has to be done via flash right? It’s not like we can update it via internet?

13 
sudo apt update
sudo apt dist-upgrade
sudo fwupdmgr refresh
sudo fwupdmgr upgrade
sudo reboot
14

I’ve mailed to gigabyte service, they respond they have report this to the department. Hope they will release update in the future…

15

“Fully updated” Acer GN10 box also only has 119GiB:

$ sudo dmidecode -t system | grep -A3 "System Information" ; free -g
System Information
        Manufacturer: Acer Inc.
        Product Name: Acer Veriton GN100
        Version: B.1
               total        used        free      shared  buff/cache   available
Mem:             119           3         115           0           1         116
Swap:             15           0          15
16

The 2 GiB difference between OEMs is firmware carveout — each manufacturer reserves a different amount for platform use.

The baseline thread has reproducible measurement tools for cold standalone runs — memory, temperature, power, and clocks — to compare how your unit behaves against other GB10 systems. Note the numbers reflect controlled baseline conditions, not peak inference throughput: GB10 Hardware Baseline — First Direct Measurements and Findings - #15 by parallelArchitect

17

I have two gigabyte atoms, one has firmware from end of 2025, another - from feb 2026. 2025 has 120G available, 2026 has 122G available.

18

I think you could update the firmware. I have one gigabyte, it used to be 119GB for so long and finally we get an update, it is now 121GB, be the same with DGX Spark.

19

Yeah, I know. I looked at gigabyte website and very confusing page with slapped instructions, no explanation, no change log. Just sloppy work. If someone updated gigabyte please share proven path.