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[twitch] AMD presents RX470 and RX460 - Page 28

post #271 of 280
Quote:
Originally Posted by ZealotKi11er View Post

I think 470 will have less SP then that. Reason is because its only slightly faster then 380X which is 2048 SP card. The difference is 470 will have higher clocks. I am expecting 1792 SP or even 1536 SP.



We know that Polaris 11 will have 16 CUs which equates to 1024 SP(supposed RX 460). We also know that full Polaris (supposed RX 480) will have 36 CU and therefore have 2304 SP. Since AMD is only releasing 3 products in their lineup, it would be fitting to have a product sandwiched between the two. Therefore, a 26 CU model would be idea. Since CUs are clustered into groups of 4, it may be possible that the the RX 470 28 CU product with 1792 SP. 24 CU with 1536 SP is highly unlikely.

Nevertheless, considering that Pitcairn(Trinidad), Antigua(Tonga) , Tahiti, and Hawaii(Grenada) all had only a single CU cluster disabled between product offerings, a 2048 SP RX 470 isn't out of the scope of probability. In fact, Fiji was the only product launch that had 2 CU units locked between different products in the same family.
Edited by Slomo4shO - 6/16/16 at 6:22pm
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post #272 of 280
Quote:
Originally Posted by ZealotKi11er View Post

I think 470 will have less SP then that. Reason is because its only slightly faster then 380X which is 2048 SP card. The difference is 470 will have higher clocks. I am expecting 1792 SP or even 1536 SP.

I think it'll be 1536 or 1792. Any higher and the 470 and 480 will be too close, with a huge gap between 470 and 460.
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post #273 of 280
Quote:
Originally Posted by Gungnir View Post

I think it'll be 1536 or 1792. Any higher and the 470 and 480 will be too close, with a huge gap between 470 and 460.

Recall the gap between the HD 7870, HD 7850, and HD 7770?

Truth be told, I am surprised that Polaris 11 isn't 20 CUs or 24 CUs. It is a very large cut from Polaris 10.
Edited by Slomo4shO - 6/16/16 at 6:44pm
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post #274 of 280
Quote:
Originally Posted by Slomo4shO View Post

Recall the gap between the HD 7970, HD 7850, and HD 7770?

Truth be told, I am surprised that Polaris 11 isn't 20 CUs or 24 CUs. It is a very large cut from Polaris 10.

I think you might be forgetting a couple cards there...

7970 (2048) -> 7950 (1792) -> 7870 (1280) -> 7850 (1024) -> 7770 (640) -> 7750 (512)

The biggest gaps (7870->7950 and 7770->7850) were both 512 SPs or less, and in both cases the lower card had a significant clock advantage. And those gaps were filled in with other cards later:

7970 (2048) -> 7950 (1792) -> 7870 XT (1536) -> 7870 (1280) -> 7850 (1024) -> 7790 (896) -> 7770 (640) -> 7750 (512) -> 7730 (384)

Since AMD seems to want 3 cards to cover 1024 to 2304 SPs, it seems more likely to me that they'll distribute them more or less evenly, rather than having two almost equal at the top, and a huge gap down to the bottom.
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post #275 of 280
Quote:
Originally Posted by Gungnir View Post

7970 (2048) -> 7950 (1792) -> 7870 XT (1536) -> 7870 (1280) -> 7850 (1024) -> 7790 (896) -> 7770 (640) -> 7750 (512) -> 7730 (384)

Sorry there was a typo which I corrected. Was comparing the two Pitcairn models to the the high end Cape Verde. The 7870 XT was a cut down Tahiti which was released 10 months after the initial Tahiti launch. The 7790 (Bonaire) was also launched a year after Pitcairn and Cape Verde.

In Q1 of 2012 AMD had the following lineup: 7970 ($549) -> 7950 ($450) -> 7870 ($350) -> 7850 ($250) -> 7770 ($160) -> 7750 ($110) -> 7730 ($60)

Pitcairn was 212 mm² whereas Cape Verde was 123 mm² and Tahiti was 352 mm². They seem the most relevant comparisons. Bionaire was GCN 1.1 and was launched a year later so it seems irrelevant in this discussion.

The difference between Tahiti XT and Pitcairn XT: 7870 had 37.5% fewer SP than 7970.

The difference within Pitcairn: 7850 had 20% fewer SP than 7850.

The difference between Pitcairn XT and Cape Verde XT: 7770 had 50% fewer SP than 7870.

The difference between Pitcairn Pro and Cape Verde XT: 7770 had 37.5% fewer SP than 7850.

Polaris 10 vs Polaris 11:

The difference between Polaris 10 and Polaris 11: full Polaris 11 has 55.5% fewer SP than full Polaris 10.
Edited by Slomo4shO - 6/16/16 at 7:29pm
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post #276 of 280
Quote:
Originally Posted by Slomo4shO View Post

Sorry there was a typo which I corrected. Was comparing the two Pitcairn models to the the high end Cape Verde.

Ah, I didn't see the edit; that makes more sense.
Quote:
The 7870 XT was a cut down Tahiti which was released 10 months after the initial Tahiti launch. The 7790 (Bonaire) was also launched a year after Pitcairn and Cape Verde.

That's why I didn't include them in the first list. The second was just showing how they filled the gaps later.
Quote:
The difference between Tahiti XT and Pitcairn XT: 7870 had 37.5% fewer SP than 7970.

The difference within Pitcairn: 7850 had 20% fewer SP than 7850.

The difference between Pitcairn XT and Cape Verde XT: 7770 had 50% fewer SP than 7870.

The difference between Pitcairn Pro and Cape Verde XT: 7770 had 37.5% fewer SP than 7850.

Polaris 10 vs Polaris 11:

The difference between Polaris 10 and Polaris 11: full Polaris 11 has 55.5% fewer SP than full Polaris 10.

If the 470 has 2048 SPs, then it's a difference of 50% between it and the 460. 1792 SPs is a difference of ~42%, 1536 is ~33%; the 7770's 37.5% is right in between them. Like I said before, 2048 SPs makes too big of a gap, unless the clock difference is huge.

EDIT: As for the difference within P10: if 470 is 2048, ~12%; if 470 is 1792, ~23%; if 470 is 1536, ~33%. If they do like the last few generations, it seems that 1792 is the most likely number for the RX 470.
Edited by Gungnir - 6/16/16 at 8:08pm
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post #277 of 280
Quote:
Originally Posted by geggeg View Post

As you said, all sorts of random media get invited to such things on both sides and not just AMD. I hope you get to listen in though thumb.gif

 

I'm in the briefing! Took a while because my mailing address got lost by the PR guys, but it's all sorted now. Eventually got through to the right people. 

 

No review samples for me though, cards are very limited for the Africa region and AMD's gunning for the most coverage they can, IMO. I might have to badger some of the local reps for review units. 

post #278 of 280
Quote:
Originally Posted by CataclysmZA View Post

I'm in the briefing! Took a while because my mailing address got lost by the PR guys, but it's all sorted now. Eventually got through to the right people. 

No review samples for me though, cards are very limited for the Africa region and AMD's gunning for the most coverage they can, IMO. I might have to badger some of the local reps for review units. 
Spill the beans!!!
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post #279 of 280
Quote:
Originally Posted by Tobiman View Post

Spill the beans!!!

 

Nothing to spill, I know about as much as anyone else does at this point. Plus, NDA, 29th June, all that jazz. Call only happens next week as well and given that people know about it now from that subreddit thread, there's a torrent of new, ridiculous speculation coming out of the woodwork now. 

 

I'd just ignore everything said until the 29th, to be honest. Unless Expreview pulls another 1080 and publishes their review way ahead of time.

post #280 of 280
Quote:
Originally Posted by prznar1 View Post

tpu is either playing with specs by guessing them, or they are doing some unspoken leaks wink.gif

https://www.techpowerup.com/gpudb/2849/radeon-rx-460

https://www.techpowerup.com/gpudb/2861/radeon-rx-470

https://www.techpowerup.com/gpudb/2848/radeon-rx-480

rops, tmus, etc
Newest roumors about 470 are saying that it will feature 32 clusters of 64 processing units. total of 2048 and floating point nearly 5 gflops.
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