Need advice on Intel Arc video cards.

[wade7575]

From what I understand the ARC cards are optimized to run in a 4.0 slot and agree you wouldn't think it would matter that much but from what a guy I know on the videohelp forums told me that he tried a3.0 slot and a 4.0 slot and it did hurt the encoding speeds on his machine,I forget the numbers he told me because it was via pm and we were testing out are set ups against each others t see different things and I have since deleted that pm.

I forget what the difference was but for him I do recall it was enough and think it was like 15 or 20%,I know with the ARC cards they seem to run best by far if you follow what Intel say's from what I have seen,I know with my i9 9900K system it ran 450 to 600fps with Handbrake and my A580 card,it had PCIe 3.0 and I was able to update bios to have resizable bar but it was just a half *** deal that Intel did with the bios update so you could run an ARC card but at crippled speeds.

 

[EarthDog]

From what I understand the ARC cards are optimized to run in a 4.0 slot

They run best with rebar enbabled, for sure. I wonder if that dude had it enabled........

Doesn't lose much there with it enabled... does when it's not....


If you're still up for some quick testing...................

........drop your link speed to 4.0 x8 (or 3.0 x16) and see if there's an appreciable difference in your work.

 

[wade7575]

He had Rebar enabled to and your correct it does run better for sure with Rebar enabled,I know rebar is most likely more important then the PCIe but I do know a youtuber that I don't really watch and I just trying to gather as much info as possible before buying an ARC card and then getting bit in the *** just incase there was something about them that was very specific and the youtuber said he found that PCIe 4 helped a decent bit but wasn't the be all to end all.

 

[EarthDog]

Yeaaaaaaaaah, that's something I'd want to prove for myself, lol. It doesn't make sense, to me, that such a slow card not doing bandwidth intensive work would slow down significantly on a 3.0 x16 slot.

I digress.

PS - Update you signature with your current hardware.

 

[wade7575]

I think it has to do with the ARC cards use AMD's (SAM)Smart Access Memory or 4G Decoding,I think it has to do with Smart Access Memory from what I read about and the card shares the system memory or something like that but I could be wrong.

 

[EarthDog]

SAM = Resizeable BAR...are essentially the same thing (one on Nvidia boards, one on AMD boards). Enabling this feature enables the CPU access to the VRAM (not system RAM)...........which uses PCIe bus to do so.

Again........ you can test it pretty easily (if you want to... you can tell me to piss off, lol) and actually figure it out for yourself/the forum. Just lower the PCIe bus to 3.0 x16 or 4.0 x8 in your BIOS and see what happens to your work.

 

[tacomike]

PCIe x.0 cards are backwards compatible.

I didn't realize that but being i have an older Am4 board an AB350M-DS3H the pci bus and cpu with a much newer card is likely to be a bottle neck I would think maybe I'm wrong.
But I pulled the trigger on a used GTX 1650 DDr6 card that is PCIe 3.0 and had the encoding capability so the Nvidia site says that I want. And the card shipped out already. Should have it Friday.

 

[EarthDog]

I didn't realize that but being i have an older Am4 board an AB350M-DS3H the pci bus and cpu with a much newer card is likely to be a bottle neck I would think maybe I'm wrong.
But I pulled the trigger on a used GTX 1650 DDr6 card that is PCIe 3.0 and had the encoding capability so the Nvidia site says that I want. And the card shipped out already. Should have it Friday.

The cpu may hold you back.

Feel free to see how little PCIe 3.0 x16 hurts the fastest gpu out there. This link is from post 20.

NVIDIA GeForce RTX 5090 PCI-Express Scaling

The new NVIDIA GeForce RTX 5090 is the first high-end graphics card that makes use of a PCI-Express 5.0 bus interface. Are you in trouble when try to run it on PCIe 4.0? What about x8, like when an SSD is using up some bandwidth? We've also tested various PCI-Express 3.0, 2.0 and 1.1 configs to...

www.techpowerup.com

 

[tacomike]

The cpu is a 2700x 8 core 16 thread. In its day it was decent. I know there is newer way better out there but building a new rig isn't something I want to do now. I just want to shave off some encoding time.