Discussion RDNA4 + CDNA3 Architectures Thread

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DisEnchantment

Golden Member
Mar 3, 2017
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With the GFX940 patches in full swing since first week of March, it is looking like MI300 is not far in the distant future!
Usually AMD takes around 3Qs to get the support in LLVM and amdgpu. Lately, since RDNA2 the window they push to add support for new devices is much reduced to prevent leaks.
But looking at the flurry of code in LLVM, it is a lot of commits. Maybe because US Govt is starting to prepare the SW environment for El Capitan (Maybe to avoid slow bring up situation like Frontier for example)

See here for the GFX940 specific commits
Or Phoronix

There is a lot more if you know whom to follow in LLVM review chains (before getting merged to github), but I am not going to link AMD employees.

I am starting to think MI300 will launch around the same time like Hopper probably only a couple of months later!
Although I believe Hopper had problems not having a host CPU capable of doing PCIe 5 in the very near future therefore it might have gotten pushed back a bit until SPR and Genoa arrives later in 2022.
If PVC slips again I believe MI300 could launch before it

This is nuts, MI100/200/300 cadence is impressive.



Previous thread on CDNA2 and RDNA3 here

 
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MrTeal

Diamond Member
Dec 7, 2003
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Still going with $550/$650. Ok, maybe $500/$650, but I doubt that. It'd kill XT sales.
Obviously Nvidia's MSRP is a very very loose suggestion, but the 5080 is only like 15% faster than a 5070 Ti and is 33% more expensive. If the 9070 XT ends up being ~15% faster than a 9070, 500/650 would be similar.
I'd also be surprised though, unless yields are atrocious and they can't get enough top bin dies.
 

blckgrffn

Diamond Member
May 1, 2003
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www.teamjuchems.com
Still going with $550/$650. Ok, maybe $500/$650, but I doubt that. It'd kill XT sales.
I don’t think anything will kill XT sales at or less and 5070ti MSRP other than actual stock availability of the 5070ti somewhere near its MSRP.

Piles of 5070 cards at $600 and less will also change the dynamic. Right now you can’t buy any Nvidia card north of the 4060 reliably.

I feel @coercitiv was spot on with this, the market is crazy. Literally what they have will sell, that’s my $.02.
 

Saylick

Diamond Member
Sep 10, 2012
3,858
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Is there even any point in FP4?

I mean.. besides the literal floating point..
If you want to really get into it...

**1. Same Number, Different Flavors**When documentation mentions 4 bits, it’s like saying you’re using “flour.” But *which* flour?- **INT4**: The all-purpose flour—straightforward and widely used- **FP4**: A specialty flour—same size bag, but with different properties
- 4-bit formats come with intriguing trade-offs: - **INT4**: Excellent for weight storage in large models (e.g., GPT-Q 4-bit quantization), capturing patterns in weights effectively. - **FP4**: Offers a broader numeric range, making it great for activation values that need more dynamic flexibility.

 
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