• Welcome to TechPowerUp Forums, Guest! Please check out our forum guidelines for info related to our community.

Sensors: Memory Used vs Memory Usage (GTX1070)

ADA

New Member
Joined
Sep 21, 2017
Messages
3 (0.00/day)
What cases the "sensor" tab in GPU-Z look different (see attached image) on two PC with identical hardware and software configuration? On the left schreenshot the memory is "split" into Dedicated and Dynamic. On the right screenshot there is only one parameter called "Memory Used". What might cause this difference? How to configure GPU-Z to show the same parameters?

Used Setup:
Nvidia GTX1070 (vRAM 8GB)
latest driver 22.21.13.8541 from 21 Aug 2017
DELL Precision T5810, Windows 7
Latest version of GPU-Z 2.4.0
The Graphic Card tab shows identical properties for both GPU.

Why I am asking this question:
On the first PC a custom big-data scientific application crashes with a CUDA out-of-memory error. The "Memory usage (Dedicated)" goes up to 4GB and then the crash happens. On the other PC with the same hardware and software configuration the same application with the same parameters runs properly. The "Memory Used" goes up to 8GB as expected.

Could the first graphic card be defect?

I would really appreciate any suggestions!




(Please note, I am not asking what is the difference between Dedicated and Dynamic memory. The screenshots were taken in the Idle state when the abovementioned application was not running.)
 

rtwjunkie

PC Gaming Enthusiast
Supporter
Joined
Jul 25, 2008
Messages
13,909 (2.43/day)
Location
Louisiana -Laissez les bons temps rouler!
System Name Bayou Phantom
Processor Core i7-8700k 4.4Ghz @ 1.18v
Motherboard ASRock Z390 Phantom Gaming 6
Cooling All air: 2x140mm Fractal exhaust; 3x 140mm Cougar Intake; Enermax T40F Black CPU cooler
Memory 2x 16GB Mushkin Redline DDR-4 3200
Video Card(s) EVGA RTX 2080 Ti Xc
Storage 1x 500 MX500 SSD; 2x 6TB WD Black; 1x 4TB WD Black; 1x400GB VelRptr; 1x 4TB WD Blue storage (eSATA)
Display(s) HP 27q 27" IPS @ 2560 x 1440
Case Fractal Design Define R4 Black w/Titanium front -windowed
Audio Device(s) Soundblaster Z
Power Supply Seasonic X-850
Mouse Coolermaster Sentinel III (large palm grip!)
Keyboard Logitech G610 Orion mechanical (Cherry Brown switches)
Software Windows 10 Pro 64-bit (Start10 & Fences 3.0 installed)
Switch the graphics card between the two machines. If the one gives the same 4GB message in a different unit, you will be well on your way to knowing the answer
 

ADA

New Member
Joined
Sep 21, 2017
Messages
3 (0.00/day)
Switch the graphics card between the two machines. If the one gives the same 4GB message in a different unit, you will be well on your way to knowing the answer
This is a good suggestion, unfortunately I cannot switch the graphic cards as the machines are physiclly located in different departments.

I would like to understand the difference between "Memory Used' and "Memory Usage" and how to force GPU-Z to show one or another, though. Figuring out if the first graphic card is defect would be just a bonus.
 

W1zzard

Administrator
Staff member
Joined
May 14, 2004
Messages
26,936 (3.72/day)
Processor Ryzen 7 5700X
Memory 48 GB
Video Card(s) RTX 4080
Storage 2x HDD RAID 1, 3x M.2 NVMe
Display(s) 30" 2560x1600 + 19" 1280x1024
Software Windows 10 64-bit
The Memory Used (1 Sensor) is provided by the NVIDIA driver, if that can't be found GPU-Z will use a sensor from the OS (the one with two entries)
 

ADA

New Member
Joined
Sep 21, 2017
Messages
3 (0.00/day)
The Memory Used (1 Sensor) is provided by the NVIDIA driver, if that can't be found GPU-Z will use a sensor from the OS (the one with two entries)
Is there a way to "enable" that sensor in the NVIDIA driver? The drivers on both graphic cards are freshly downloaded and installed.

The Windows OS (also the process explorer) report only 4GB of dedicated memory on both graphic cards. (I have read somewhere that this might be a Win7 bug)

Bild2.PNG
 

W1zzard

Administrator
Staff member
Joined
May 14, 2004
Messages
26,936 (3.72/day)
Processor Ryzen 7 5700X
Memory 48 GB
Video Card(s) RTX 4080
Storage 2x HDD RAID 1, 3x M.2 NVMe
Display(s) 30" 2560x1600 + 19" 1280x1024
Software Windows 10 64-bit
The Windows OS (also the process explorer) report only 4GB of dedicated memory on both graphic cards. (I have read somewhere that this might be a Win7 bug)
Yeah that's a Windows 7 issue

Is there a way to "enable" that sensor in the NVIDIA driver? The drivers on both graphic cards are freshly downloaded and installed.
No idea how to enable the NVIDIA sensor. You can force the use of the Windows memory sensors by adding a registry key Force_WDDM_Mem_Sensor DWORD 1 to GPUZ's registry entries
 
Joined
Apr 19, 2010
Messages
8 (0.00/day)
Location
Belgrade, Srbija
Processor Intel i5-4960K@4,5GHz
Motherboard Gigabyte Z97-D3H
Cooling XIGMATEK Loki
Memory 2x4GB 1866MHz Kingston HyperX Fury
Video Card(s) PowerColor R9 270
Storage 240GB Patriot Blast, 1TB Seagate Barracuda ST1000DM003
Display(s) LG W2242T
Case Antec 900
Audio Device(s) Onboard
Power Supply SS-500ET
Software Win7 64bit
Top