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[WCCF] AMD Fiji XT R9 390X Leaked For The Third Time On Zauba – 20nm Looks Promising - Page 5

post #41 of 150
Tek Syndicate once again teasing about unreleased AMD products, damn...

https://www.youtube.com/watch?v=npqM1-rcWuk

At the 13:23 mark.
post #42 of 150
Long post incoming.
Quote:
Originally Posted by shadow85 View Post

I need faster GPU's, 2x GTX 980 gamings is not giving me smooth frames @ 4K. So hurry AMD and release this beast so I can throw my money at 2 of them!

The 980 is literally designed to dominate at 1920x1080. It isn't designed to work at 4K at all. It isn't designed to handle surround-gaming. It's for 1920x1080 and 1920x1080 only, and at 1920x1080 it's untouchable (at this time). Increase the resolution and even the R9 290 and the 770 will win. This is why a lot of people are (rightfully) calling the 980 a mid-end card; it is.
Quote:
Originally Posted by CynicalUnicorn View Post

2(512 bits * 5GHz) = X bits * 1GHz
X = 2(512 bits * 5GHz)/1GHz
X = 5120 bits

In a single cycle, that's 640 bytes or 62.5% of a KiB. Not bad! I wonder if latency will be an issue since the frequency is so much lower. Something like a single optical fiber has very low latency and bus width, but a truck full of hard drives has a much higher "bus width" at the expense of your ping times.
#MasterRaceProblems tongue.gif

I have no idea what you where trying yo calculate here. The Fiji (R9 390x) is estimated to have a memory bandwidth of 550GB/s++. The R9 290X has a bandwidth of 320GB/s, the 780ti 336GB/s and the 980 224GB/s. This is what matters. It doesn't matter if its 256b, 512 or 4096 bit wide, all that matters (for absolute performance) is the raw bandwidth. From a power-performance point of view, you want a wide and slow buss, but that increases the complexity of the PCB a lot, and that drives the BoM up. HBM reduces the added cost a lot. This is also why HBM will lower the power-usage while increasing the performance.
Quote:
Originally Posted by mtcn77 View Post

If this Fiji XT is indeed the new mid range as I assume it is, soon it will be lolfest when it comes out.

I don't know where you got the idea that Fiji is mid-range..? There was this one article a few weeks ago that had 2 of the new AMD GPUs and two of the new nvidia GPUs, but that article isn't solid. Do you really think that someone would get hold of ALL the next-gen cards at the same time, and have time to bench them against each-other? That's a lot of stars aligning just perfect; too many for it to be believable.

Fiji is a top-end card (R9 390x) and will be with us Q2 unless there are further delays. Expect nvidia and AMD to launch within weeks of each other.
Quote:
Originally Posted by Just a nickname View Post

Well, they let the reader guess they are not sure at all of what they're saying. Look at the table, it's not even indicated. So either they had some info and try to attract more traffic by including 20nm or they just made this all out using the shipping data as supporting evidence of their claim.

They did what is commonly called writing a fairytale. They might be interesting and entertaining, and might even have some life-lesson and/or morals, but in the end, it's fiction. Nothing more, nothing less. See here for a great article from Fudzilla about why there will be no 20nm GPU* from neither AMD or nvidia.

*dedicated GPU. APUs might be made at TSMCs 20nm node, but no high-end GPUs. Read the article, keeping in mind Fiji is expected to be 550mm2+ at 28nm or about 400mm2+ at 20nm.
Quote:
Originally Posted by iamhollywood5 View Post

As far as the 20nm stuff goes, I really can't understand why AMD would go this long between flagships if they're just putting out another 28nm gpu. I mean really, it would be pointless. If AMD wanted to do another 28nm GPU it would have been released already. If they've sat on the 290X for this long, it's because they're waiting for 20nm.

They wouldn't if they could choose. As it stands, and have been known for some time, TSMCs 20nm node is useless (yields) for any chip larger than about 200mm2. It takes at least 9 months from finished, bug free design to launch-volume of said chip is possible. This is if every step of the process goes without problems or delays. 2nd rule of silicone, there is always a delay. This put AMD in the spot where they decided to launch the R9 285, in order to do some extended testing of the 28nm node, checking the yields of the new core design (GCN 1.2) and test some other new features (multi-orientation eyefinity). Sadly the performance of the 285 was below what was expected, and the price wasn't low enough to compensate. If it would have been called (and priced as) R9 275, I believe it would sell as fast as they could make them (remember the ATi 4770 or the 8800GT?). That way, when the next generation launches, it will be as smooth of a launch as can be (AMD 5000 series launch).

In the end, AMD was already more than ready to launch a GPU with HBM, and 20nm wouldn't work with that at all, see the Fudzilla article above, but they had to make it work at 28nm, so they did. Launching with both HBM and 16nm was considered to large of a gamble, so they had no choice. It was 28nm + HBM or no new cards at all.
Quote:
Originally Posted by Leopard2lx View Post

This might beat the 290x by about 15% at best....20% if lucky....maybe edge out the 980....

Really? That is a lot lower estimate that every other realistic estimate I have seen. Most hover around the 40% -> 60% increase in performance over the R9 290X. And as far as the 980 goes, if you dare go to a resolution over 2560x1600 it crumbles. It's simply starved of bandwidth. A R9 290X is equal to the 980 at 4K despite the 980 running circles around the R9 290X at 1920x1080. For memory on a GPU, it's not about the GBs, it's about the GB/s wink.gif
post #43 of 150
Quote:
Originally Posted by SlackerITGuy View Post

Tek Syndicate once again teasing about unreleased AMD products, damn...

https://www.youtube.com/watch?v=npqM1-rcWuk

At the 13:23 mark.

i like this one better . . .

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post #44 of 150
Quote:
Originally Posted by Leopard2lx View Post

This might beat the 290x by about 15% at best....20% if lucky....maybe edge out the 980....

So they waited a year and an half to release a gpu that is barely 15% faster even with bandwidth that almost doubled due to HMB that is also on a new architecture? Please...
post #45 of 150
What's the 75000 INR mean cost mean?
    
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post #46 of 150
Quote:
Originally Posted by Jaydev16 View Post

What's the 75000 INR mean cost mean?

75000 indian rupees(~1200 usd)
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post #47 of 150
Here's some random musings about stuff people might not recall:

- Bermuda is what they were calling the 390X in chiphell graphs, Fiji was the 380X. It has been back and forth depending on day of the week, author, windage...

- The Synapse "leak" about the two 28HPM tapeouts was a slide displayed on their website. It originated on Anands from a new forum account. Someone clearly wanted us to see this.
post #48 of 150
Quote:
Originally Posted by Dudewitbow View Post

75000 indian rupees(~1200 usd)
Thought as much. Just when I thought AMD couldn't price stuff higher. Sigh, I hope they concentrate on fair pricing in India soon. 75000 is waaaaaayyyyyyyy more than anyone will spend for it here.
    
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post #49 of 150
Quote:
Originally Posted by Dupl3xxx View Post

I don't know where you got the idea that Fiji is mid-range..? There was this one article a few weeks ago that had 2 of the new AMD GPUs and two of the new nvidia GPUs, but that article isn't solid. Do you really think that someone would get hold of ALL the next-gen cards at the same time, and have time to bench them against each-other? That's a lot of stars aligning just perfect; too many for it to be believable.

Fiji is a top-end card (R9 390x) and will be with us Q2 unless there are further delays. Expect nvidia and AMD to launch within weeks of each other.
They did what is commonly called writing a fairytale. They might be interesting and entertaining, and might even have some life-lesson and/or morals, but in the end, it's fiction. Nothing more, nothing less. See here for a great article from Fudzilla about why there will be no 20nm GPU* from neither AMD or nvidia.
I have heard full Pirate Islands series gpus being referenced as "Bermuda" which was the reason I made the bet that Fiji is either a stopgap, or a mid-range gpu. You couldn't argue much regarding past the benefits of HBM, either. 60% bandwidth gain & 40% power reduction... I have come across whitepapers refer to the ratio of gddr5 memory per gpu consumption at 30% - that is highly unlikely that they were referencing anything, but mainstream gpus(128/256bit imc), also HBM is nothing like gddr5 in that it doesn't require end to end traces separately laid out on the pcb which tend to add up in the volume of power requirements.
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post #50 of 150
Quote:
Originally Posted by Jaydev16 View Post

Thought as much. Just when I thought AMD couldn't price stuff higher. Sigh, I hope they concentrate on fair pricing in India soon. 75000 is waaaaaayyyyyyyy more than anyone will spend for it here.

Why do people all the time think the engineering sample's price represents the final product price..
Edited by julizs - 1/11/15 at 1:40am
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