re: PC Discussion - Gaming, Performance and Enthusiasts

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So, even if I wanted to get a 4080 Super (not saying I do, but I thought about it), I can't because no one has them at launch.

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As Benny said, it’s all scalper bullshite. Give it a week or two to shake out.

So for those playing the home game, the 4080S is basically 2% faster than the original 4080. It’s essentially on par to the 7900xtx in pure raster, much better in RT, and a bit better power efficiency. I would expect to see the price of the 7900xtx drop to somewhere between $850-$900 in response to this release.

In conclusion: 4080S is boring, the 7900xtx is boring, and this whole generation sucks

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Joshjrn

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I know jayztwocents is the review demigod to Tech Jesus, but he took a dump on AMD's 3d vcache and said he's switching back to Intel. Have you gotten a chance to see this video, by chance?

YouTube - jayz channel

He said something to the tune of certain games will use the vcache incorrectly, causing the game to....well shite, I don't really understand. Was wondering your thoughts on this as you seem to be an AMD guy.

I’m not in a position to load the video right now, but if it’s the one I’m thinking of, it’s less that he’s shitting on the x3D in general and more than he’s shitting on the… 7950?x3D he had in his system because the chip/Windows/programs/whatever don’t handle the hand off well between the 8 cores with the extra cache and the 8 cores that don’t. The system makes a ton of mistakes, and he got tired of micromanaging it.

Unless this is a brand new video that says something different, I don’t think he has any issue with the single die chips (everything below the X900) with 3D vcache.

Eta: to clarify the issue with the handoff, his chip only had the extra vcache on half of the cores. Some games were using the die (with half the cores) without the extra vcache, therefore defeating the purpose of having the extra vcache to begin with. Other tasks that don’t care about vcache and would do better with higher clock speeds would prioritize the slower die with the extra vcache, etc, etc.

Eta2: So a chip like the 7800x3D with only one die wouldn’t have the same problem, as every core has access to the extra vcache.

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Eta: to clarify the issue with the handoff, his chip only had the extra vcache on half of the cores. Some games were using the die (with half the cores) without the extra vcache, therefore defeating the purpose of having the extra vcache to begin with. Other tasks that don’t care about vcache and would do better with higher clock speeds would prioritize the slower die with the extra vcache, etc, etc.

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I guess this isn't the case, but I thought I read somewhere that the 3d vcache on the 7950x3d was split, allowing it to be split between cores (say 8/8).

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So one die with 8 cores has access to the normal amount of vcache while another die with 8 cores has access to the normal vcache plus the extra 3D cache

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So only one die has 3d vcache. Got it. You kinda have me nerding out on this stuff now. lol.


ETA: It may not be possible, but would AMD consider adding 3d vcache to both die in the future?

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So only one die has 3d vcache. Got it. You kinda have me nerding out on this stuff now. lol. ETA: It may not be possible, but would AMD consider adding 3d vcache to both die in the future?

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Their position was that because current games generally don’t even use 8 cores, adding the 3D vcache to the second die was both an unnecessary cost increase as well as a reduction in performance of that second die.

I think they expected the hand off logic to work better than it does, and in hindsight, I wonder if they regret that decision. They basically have three options: significantly improve the hand off logic, include the vcache on both dies, or simply stop selling the x3D above the X800 chips. Only time will tell which they choose.

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Does the 7900x3d suffer from the same issue as the 7950x3d?

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Same issue but worse. Only one die has the extra vcache, and each die has six cores. So where both the 7800x3D and 7950x3D have a die with extra vcache and eight cores, the 7900x3D has one six core die with extra vcache.

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All the last two years has reinforced is that I made a great decision going with my 5800x3d/3080FE build and I still can’t believe Josh and I were able to procure the 3080 in the fashion we did

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Still feels like a fever dream

So, it still does, to an extent. Traditionally, the XX70 matches the previous XX90. The problem is that the “mid range” now costs $800.

I’m bored and made a PC build that had to be under $700

LINK

Think you can get better for $700?