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mikk

Diamond Member
May 15, 2012
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That is precisely what's happening it has dedicated Vram and more resources to access to comparison to MTL made more sense


Even with the bandwidth disadvantage Xe2 is easily faster there and in some a lot faster. It's on average 27% faster in 5 games. Against MTL it was 50% on average with 14% more LPDDR5x bandwidth.
 

DAPUNISHER

Super Moderator CPU Forum Mod and Elite Member
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The first shipments of B580 should sell out quickly. The only competition is the 7600XT 16GB which is going for $280 for the holiday weekend on the Gigabyte model and backordered until January. I'd expect that will be where some models settle in once B580 is available. B should be faster, and wins upscaling and ray tracing; important marketing points. The only marketing point for AMD is the extra vram, and it isn't going to matter at playable resolutions.
 

511

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Jul 12, 2024
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The first shipments of B580 should sell out quickly. The only competition is the 7600XT 16GB which is going for $280 for the holiday weekend on the Gigabyte model and backordered until January. I'd expect that will be where some models settle in once B580 is available. B should be faster, and wins upscaling and ray tracing; important marketing points. The only marketing point for AMD is the extra vram, and it isn't going to matter at playable resolutions.
Yeah 12GB is good enough for the target resolution and Intel can sell their AI XMX i hope we get ExtraSS Frame Gen
 

DAPUNISHER

Super Moderator CPU Forum Mod and Elite Member
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Yeah 12GB is good enough for the target resolution and Intel can sell their AI XMX i hope we get ExtraSS Frame Gen
Good point on frame generation. You have to tick every box Nvidia has.

My question is this: For whichever RTX card the raster is fairly equivalent to, will it be the first to beat current RTX at ray tracing?
 
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Frame generation isn't mentioned so seems like either Intel didn't have the resources (coz they fired them) to develop that feature or the drivers/software is still a work in progress...
 

DavidC1

Golden Member
Dec 29, 2023
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Good point on frame generation. You have to tick every box Nvidia has.
I'm not sure how important that is. They have a lot to fix on Alchemist. We know the gap between synthetic and games are mostly addressed. We know the utilization is better, and engines that use Execution Indirect will perform better, among other small changes. We know Day 0 compatibility is going to be better too.

What else? Power with multiple monitor and 2D. ReBar needed both for performance and compatibility. Fixing those will make Battlemage a lot better GPU. I don't really care about the power aspect, but the ReBar thing is a big deal. It automatically makes it suck for older systems. But ARC is supposed to be affordable! Nothing says affordability like sprucing up an older system with a newer GPU.
My question is this: For whichever RTX card the raster is fairly equivalent to, will it be the first to beat current RTX at ray tracing?
I have doubts. Xe2 has 50% more RT units per shader but overall it performs 50% higher. Since RT takes up a fixed amount of compute time, it needs to be 50% faster just to make up for it.

Let's say a game is:
0.7 for raster, and 0.3 for RT. A card with 1x raster and 1x RT performance will render a frame in 1 Time Unit.

If you speed up raster by 1.5x, then the overall performance is 0.7/1.5 + 0.3 or 0.767, or only 30% faster. To get full 1.5x faster, the RT unit also has to be 1.5x as fast.

You could get raster 10x the speed, but the overall performance is only going to be 2.7x as fast. RT performance is basically single threaded portion of "Amdahl's Law" for GPUs. Shall we call it "Amdahl's RT Law"? At least, that's my understanding.

So how it compares to competition depends on how much they added for RT units.
 
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