AMD Radeon RX 7900 XTX and XT Smart Access Memory Performance

[Brent_Justice]

Introduction This review is going to cut straight to the chase, we are going to find out how performance is affected on the new AMD Radeon RX 7900 XTX and Radeon RX 7900 XT video cards with AMD Smart Access Memory On versus Off. AMD Smart Access Memory is related to the PCI-Express Resizable BAR […]

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[Marees]

Very interesting results.

Good work !!!

 

[hubaduba]

It would also be interesting to see the effect of ReBAR on an Intel system vs. SAM on an AMD mobo. Hell, then you could compare the setting with AMD and Nvidia GPUs on each platform. Cause you have unlimited time to run benchmarks, of course.

 

[DrezKill]

Thanks for testing this!

 

[Brian_B]

I never read much into it and I thought SAM was ReBAR on AMD systems.

Not sure what the difference is.

 

[Grimlakin]

Yea found I had Sam on but it wasn't working because of csm. I turned that off.

 

[tungt88]

@Brent_Justice Your data in the review got a brief mention here on the TPU forums, where SAM was asked by a forum member to Wizzard (posts #65 & #66).

 

[Brent_Justice]

@Brent_Justice Your data in the review got a brief mention here on the TPU forums, where SAM was asked by a forum member to Wizzard (posts #65 & #66).

I'm not subbed over there, a response I would pose is that while yes AMD SAM utilizes Resizeable BAR, (it is the road by which it travels, which has to be on) AMD SAM has a little more 'special sauce' either via software, and or hardware combination, when in combination with AMD's platform, that provides a higher uplift of performance in select games. AMD has done a little extra with ReBAR. It's not just a "toggled-on" scenario, but there is a little secret sauce adding to the ingredients, enhancing it more. It would be a worthwhile conversation to have.

 

[Brent_Justice]

They backup what I've said. So it isn't just me.

 

[Brent_Justice]

Another one, Enable Smart Access Memory, it does stuff.