Slow memory read / write on a MSI RX 6650 XT Mesh 2

[astrakan]

Hi
I need some opinion about the memory read / write speed of my CG...
I´m using a MSI B550 Gaming plus with a 5600G processor. Graphic card is pcie 4.0 conected in 3.0, has 8 lines and not 16 : maybe the reason the speed is so slow ? But even twice the speed it´ll give about 12Mb/s which is slow too.
I´d like to understand.
Thanks in advance

 

[VuurVOS]

Hi
I need some opinion about the memory read / write speed of my CG...
I´m using a MSI B550 Gaming plus with a 5600G processor. Graphic card is pcie 4.0 conected in 3.0, has 8 lines and not 16 : maybe the reason the speed is so slow ? But even twice the speed it´ll give about 12Mb/s which is slow too.
I´d like to understand.
Thanks in advance

5600G is the cause of PCI-e 3.0 and 8x mode. Its is sharing the bandwidth with the IGP (even when turned off) and the PCI-e slot.

 

[astrakan]

IGP is off indeed and ReBar enabled. I know about pcie 3.0 8x mode due do 5600G. But 6GB/s of GPU memory read/write ??? Seems like DDR1 from 90's.
With a 5000x series it will be 12GB/s or more ?

 

[VuurVOS]

IGP is off indeed and ReBar enabled. I know about pcie 3.0 8x mode due do 5600G. But 6GB/s of GPU memory read/write ??? Seems like DDR1 from 90's.
With a 5000x series it will be 12GB/s or more ?

When running at 3.0 mode it also means half of the bandwidth.

 

[3x0]

Check with this tool and post your results https://github.com/GpuZelenograd/memtest_vulkan/releases/tag/v0.5.0

 

[astrakan]

Check with this tool and post your results https://github.com/GpuZelenograd/memtest_vulkan/releases/tag/v0.5.0

Hi
See attached file. Does this mean GPGPU from Aida64 gives false results (or gpu is idle during this mem benchmark) ?
Don't know GpuZelenograd does actually.
Thanks

When running at 3.0 mode it also means half of the bandwidth.

Yes, but twice the actual value gives 12GB/s. It's low ... I have about 47GB/s with my system DDR4. DDR5 from the GPU is suposed to be very fast.

 

[3x0]

You can check VRAM clock speeds in GPUz during AIDA test to see if the card boosts correctly. From what I remember, those memtest_vulkan results are OK.

 

[astrakan]

You can check VRAM clock speeds in GPUz during AIDA test to see if the card boosts correctly. From what I remember, those memtest_vulkan results are OK.

read / write test is very quick. Even puting gpuz at a refresh rate of 0,1s it´s hard to be sure : it seems though that gpu and memory are kind of sleeping during test.
However, considering this test my results are ok : 12GB/s in this review and I have 6GB/s because of my pcie 3.0 8 lines
In short, it seems that my results are ok.
Thank you guys