Official AMD Polaris Review Thread: Radeon RX 480, RX 470, and RX 460

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linkgoron

Platinum Member
Mar 9, 2005
2,334
857
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Why is it whenever an AMD product underperforms it's GloFo's fault? 14LPP isn't as good as 16FF+, but the performance delta at the process level is like 10-15% tops.

10%-15% is quite a lot, it would put the reference 480 at 980/Fury level.

Indeed, Polaris under-performing could be placed on Glofo, and I'm sure they have some part in it. However I think that people are putting too much blame on GloFo.

TSMC made both Hawaii and Maxwell, and we saw what happened there. Things look quite similar to how they looked in the previous generation.
 

AtenRa

Lifer
Feb 2, 2009
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So performs worse than the no connector 75W GTX 950s and draws more power?




TPU only measures the GPU, Chiphell graph is for the entire system (109W in not the RX 460 alone ).

Also RX 460 compete against the GTX 750Ti not the GTX 950.

Custom RX 470 4GB from Gigabyte and MSI currently available in newegg at $199,99, at that price they are way better products than current GTX 960 4GB in that price range.

http://www.newegg.com/Product/Produ...85&IsNodeId=1&bop=And&Order=PRICE&PageSize=30
 

Sweepr

Diamond Member
May 12, 2006
5,148
1,142
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TPU only measures the GPU, Chiphell graph is for the entire system (109W in not the RX 460 alone ).

Also RX 460 compete against the GTX 750Ti not the GTX 950.

Pricing will determine this, GTX 950 starts at $134 right now. From the leaked benches Polaris 11 barely outperforms a 2.5 years old 28nm planar 750 Ti and uses more power.

 

antihelten

Golden Member
Feb 2, 2012
1,764
274
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Also RX 460 compete against the GTX 750Ti not the GTX 950.

I don't think AMD agrees with you on that one, given that they themselves have compared it to the 950.

From the leaked benches Polaris 11 barely outperforms a 2.5 years old 28nm planar 750 Ti and uses more power.

I don't think we can conclude yet whether or not the 460 uses more power than a 750 Ti. As AtenRa mentioned the ChipHell numbers are system power, and since we don't have comparable numbers for the 750 Ti, we can't really compare yet.
 
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raghu78

Diamond Member
Aug 23, 2012
4,093
1,475
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GloFo isn't to blame for it all.

How are you so quick to dismiss that Glofo is not to blame. AMD is basically pumping a lot more voltage than necessary as to qualify a lot more dies as working Rx 480. The fact that you can undervolt and get better performance due to reduced clock throttling shows that the process has significant variance which is forcing AMD to use more voltage to qualify the maximum dies possible.

https://translate.google.com/transl....de/2016-06/radeon-rx-480-test/12/&edit-text=

Why is it whenever an AMD product underperforms it's GloFo's fault? 14LPP isn't as good as 16FF+, but the performance delta at the process level is like 10-15% tops.

dude 10-15% higher transistor performance is quite close to a half node improvement in terms of transistor performance . Full node transitions bring 30-35% higher transistor performance at same power or 50% lower power at same transistor performance. The more damning aspect is GF 14 LPP is nowhere close to a robust implementation of Samsung 14LPP with significant process variance. In fact AMD has mentioned they are running actual product through Samsung and I would guess if GF does not resolve the process issues they will force GF to reduce their WSA commitments and have Samung fab chips for them. The Q2 2016 GF wafer purchases were very low and the 2016 WSA has still not been revealed.

http://seekingalpha.com/article/399...-results-earnings-call-transcript?part=single

Total wafer purchases from GLOBALFOUNDRIES in the second quarter was $75 million, and year-to-date, we have purchased $259 million.

Stacy Aaron Rasgon - Sanford C. Bernstein & Co. LLC

Got it. If I could ask one more really quick. I was just a little surprised at how much your wafer purchases at GLOBALFOUNDRIES came down quarter-over-quarter, given the increase in notebooks as well the timing of the Polaris launch. Should we read anything into that?

Devinder Kumar - Chief Financial Officer, Treasurer & Senior VP

I think basically the purchases of the wafers are in line with product demand and mix of business and as I said in the prepared remarks, year-to-date we've purchased about $260 million of wafers and we are getting into the back half of the year, which as you can see, with our revenue guidance in Q3, is pretty strong.


Joseph L. Moore - Morgan Stanley & Co. LLC

Great. Thank you. I was also curious about the GLOBALFOUNDRIES being so low in Q2. And I guess, have you guys finalized the 2016 wafer supply agreement, and can you talk more generally about how you're deciding which products are allocated to GLOBAL and TSMC and is there anything that's exclusive to one or the other?

Devinder Kumar - Chief Financial Officer, Treasurer & Senior VP

Yeah, several parts to it. The working relationship, as Lisa said, with GLOBALFOUNDRIES is very good. We continue to work through the 2016 WSA and that part's now finalized. We are in the process of negotiating that. In the meantime, we continue to get delivery of wafers for the products that we need in line with the product demand and mix of business. And relative to your – which products on which foundry, we typically do not share the source of foundry for any of our wafers or products.

http://www.forbes.com/sites/patrick...14nm-manufacturing-with-samsung/#3e0024a750fb
 

AtenRa

Lifer
Feb 2, 2009
14,003
3,361
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I don't think AMD agrees with you on that one, given that they themselves have compared it to the 950.

That comparison was for perf/watt at 60fps cap, also that RX 460 they used back then could be the full chip and not the cut down version they are using for the RX 460 today. The product itself today (RX 460) compete against the GTX 750Ti.
 

Sweepr

Diamond Member
May 12, 2006
5,148
1,142
131
I don't think we can conclude yet whether or not the 460 uses more power than a 750 Ti. As AtenRa mentioned the ChipHell numbers are system power, and since we don't have comparable numbers for the 750 Ti, we can't really compare yet.

We have the leaked PurePC results where RX 460 is hotter and uses a bit more power:

http://videocardz.com/63033/gigabyte-radeon-rx-460-windforce-2x-performance-leaked

Tomorrow we find out if the much better perf/watt than Maxwell they promised earlier this year turns out to be true or not. And no, the full chip at lower clocks wouldn't do miracles so that excuse is not valid.
 

AtenRa

Lifer
Feb 2, 2009
14,003
3,361
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R7 260X
14 Compute Units and 896 shaders
Core Clocks = 1100MHz
56 TMUs 16 ROPs
128bit memory and 104GB/s bandwidth

RX 460
14 Compute Units and 896 shaders
Core Clocks = 1090MHz / Boost 1200MHz
56 TMUs 16 ROPs
128bit memory and 112GB/s bandwidth

Any benchmarks that has the RX 460 bellow R7 260X are subject to question.
 

antihelten

Golden Member
Feb 2, 2012
1,764
274
126
We have the leaked PurePC results where RX 460 is hotter and uses a bit more power:

http://videocardz.com/63033/gigabyte-radeon-rx-460-windforce-2x-performance-leaked

Tomorrow we find out if the much better perf/watt than Maxwell they promised earlier this year turns out to be true or not. And no, the full chip at lower clocks wouldn't do miracles so that excuse is not valid.

That's an aftermarket 460 and 750 Ti though, so the reference numbers are still up in the air. With that being said though, it certainly looks like the efficiency claims AMD have been making are optimistic to put it mildly.
 

Sweepr

Diamond Member
May 12, 2006
5,148
1,142
131
That's an aftermarket 460 and 750 Ti though, so the reference numbers are still up in the air.

It's the same custom model from Gigabyte (Windforce 2X), it is comparable. And I'm not concluding anything, I clearly said 'from the leaked benches'.
 

jpiniero

Lifer
Oct 1, 2010
14,842
5,457
136
Any benchmarks that has the RX 460 bellow R7 260X are subject to question.

That's why I am saying it is power limited, and the clocks are dropping below base due to hitting the 75W limit. When this was originally rumored to be a 50 W part.
 

USER8000

Golden Member
Jun 23, 2012
1,542
780
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That's why I am saying it is power limited, and the clocks are dropping below base due to hitting the 75W limit. When this was originally rumored to be a 50 W part.

The RX460 only has 896 shaders - the full Polaris 11 GPU has 1024 shaders,which the WX4100 has. Even some of the early AMD marketing material said it was a 1024 shader card.

So it makes me wonder why it has 896 shaders?? 1024 shaders at a lower clockspeed is probably more efficient.
 
Aug 11, 2008
10,451
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Dr
That comparison was for perf/watt at 60fps cap, also that RX 460 they used back then could be the full chip and not the cut down version they are using for the RX 460 today. The product itself today (RX 460) compete against the GTX 750Ti.

How convenient, comparing a new 14 nm card with the previous generation 28 nm card from your competitor. It had better win, and should win by a lot more than it does.

Actually, the 460 will "compete" with whatever the market determines, not some artificially constrained scenario posited by AMD to make the chip look more competitive than it really is. Basically, it "competes" against any card of similar price that does not require a six pin connector. The 460 seems to me by far the worst of the Polaris line. Its only saving grace is that it offers semi-competent 1080p performance without a six pin connector. Yes, it beats nVidia's previous generation 750 Ti (but not by as much as it should) and probably would lose to a 75 watt 950, although I consider that to be a sort of fringe card, much like the "green" 9800 GTs that came out a few years ago. And we haven't seen the true competitor yet, which will be the nVidia 10xx equivalent. Given the significant performance/watt advantage nVidia still owns, I would expect that they could squeeze a lot more performance into a sub 75 watt card, should they care to. I am also hoping nVidia (or later AMD) chooses to put out a card at around a hundred watts with performance intermediate between the 460 and 470.
 
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USER8000

Golden Member
Jun 23, 2012
1,542
780
136
Its more worrying AMD can't sell the RX460 as a 1024 shader card. 1024 shaders at 1.1GHZ+ would get closer to a GTX950. Polaris 11 does not look a very big GPU either. The R7 370 has nearly 15% more shaders.
 

ShintaiDK

Lifer
Apr 22, 2012
20,378
145
106
How are you so quick to dismiss that Glofo is not to blame. AMD is basically pumping a lot more voltage than necessary as to qualify a lot more dies as working Rx 480. The fact that you can undervolt and get better performance due to reduced clock throttling shows that the process has significant variance which is forcing AMD to use more voltage to qualify the maximum dies possible.

Why are you so quick to dismiss uarch and IC design? Why do GloFo always have to get the blame?

GP104 would only run around 1375Mhz if it wasn't for a lot of extra work.



There is a reason why Pascal does even better in mobile than it does on desktop, unlike Polaris. R&D matters.
 
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dark zero

Platinum Member
Jun 2, 2015
2,655
138
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Dr


How convenient, comparing a new 14 nm card with the previous generation 28 nm card from your competitor. It had better win, and should win by a lot more than it does.

Actually, the 460 will "compete" with whatever the market determines, not some artificially constrained scenario posited by AMD to make the chip look more competitive than it really is. Basically, it "competes" against any card of similar price that does not require a six pin connector. The 460 seems to me by far the worst of the Polaris line. Its only saving grace is that it offers semi-competent 1080p performance without a six pin connector. Yes, it beats nVidia's previous generation 750 Ti (but not by as much as it should) and probably would lose to a 75 watt 950, although I consider that to be a sort of fringe card, much like the "green" 9800 GTs that came out a few years ago. And we haven't seen the true competitor yet, which will be the nVidia 10xx equivalent. Given the significant performance/watt advantage nVidia still owns, I would expect that they could squeeze a lot more performance into a sub 75 watt card, should they care to. I am also hoping nVidia (or later AMD) chooses to put out a card at around a hundred watts with performance intermediate between the 460 and 470.
Agreed. Even more, I feel that the 460 was in fact the rumored 450 that has that ammount of shadders for the lowest tier market and OEMs.
At least is something new... that NVIDIA can't deliver since tons of years ago a new brand low tier card since Kepler and the only card in that range that has Maxwell was the GT 930 and that is because that card have 3 models: a good model (Maxwell at 15W), a meh! model (Kepler at 25 W) and a abomination (Fermi at 50W!)
http://wccftech.com/nvidia-geforce-gt-930-launch-q1-2016-maxwell-kepler-fermi/
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And the rest of the low tier were just mere rebrands. If nVIDIA doesn't deliver something new with Pascal, seems that AMD would win big time even with that mediocre card.

Also. Seems that AMD is reserving the 450 and the 465 models for something. The full model maybe will come later and then a even more cut down version with passive cooling.
 
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antihelten

Golden Member
Feb 2, 2012
1,764
274
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It's the same custom model from Gigabyte (Windforce 2X), it is comparable. And I'm not concluding anything, I clearly said 'from the leaked benches'.

Just because they are both Windforce cards, doesn't necessarily mean that they are tuned/overclocked in a comparable fashion. Either way though, whether or not the 460 ends up above or below the 750 Ti, the efficiency claims AMD were making looks a long way off.
 
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linkgoron

Platinum Member
Mar 9, 2005
2,334
857
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Its more worrying AMD can't sell the RX460 as a 1024 shader card. 1024 shaders at 1.1GHZ+ would get closer to a GTX950. Polaris 11 does not look a very big GPU either. The R7 370 has nearly 15% more shaders.
I'm not so sure there is anything to worry about. AMD might send full Polaris 11 to laptops (as the 480m) and workstations where the margins are much higher.
 

AtenRa

Lifer
Feb 2, 2009
14,003
3,361
136
Dr


How convenient, comparing a new 14 nm card with the previous generation 28 nm card from your competitor. It had better win, and should win by a lot more than it does.

Well the competitor doesnt have a new 16nm GTX 750Ti, same thing as GTX 1080 vs Fury X

Actually, the 460 will "compete" with whatever the market determines, not some artificially constrained scenario posited by AMD to make the chip look more competitive than it really is. Basically, it "competes" against any card of similar price that does not require a six pin connector.

Lets wait and see what MSRP RX 460 will debut and its performance and then we can talk about it, but it is obvious its not a GTX 950 competitor. A full Polaris 11 chip could be a GTX 950 competitor, im guessing AMD waits for NV to release its new 16nm GTX 750Ti and then they will release a full Polaris 11 chip as the RX 465 ??
 

AtenRa

Lifer
Feb 2, 2009
14,003
3,361
136
There's a review of RX 470 on Serbian Benchmark.rs web site but I dunno if accidentally or on purpose, they've put results of Saphire Nitro rx 460 4gb.

http://www.benchmark.rs/artikal/test_sapphire_radeon_rx_470_nitro_8_gb-4169/6 .

Seems that it does around Gtx 950 performance, but in DX12 same as or higher then Gtx 960.

Can't believe I did Sign up on Anandtech forum just so everyone can check this out.

From this review the cut down Polaris 11 is as fast as the GTX 960 in DX-12. Lets wait and see more reviews and watch if this trend will continue.

Thanks for the link.
 

USER8000

Golden Member
Jun 23, 2012
1,542
780
136
Interestingly the GTX960 used is a Gainward Phantom which has a massive cooler too. Seems to have very variable performance - matches an overclocked GTX960 in Hitman:Absolution,Ashes of the Singularity,Total War and GTA V but then gets thrashed in other titles.
 

antihelten

Golden Member
Feb 2, 2012
1,764
274
126
There's a review of RX 470 on Serbian Benchmark.rs web site but I dunno if accidentally or on purpose, they've put results of Saphire Nitro rx 460 4gb.

http://www.benchmark.rs/artikal/test_sapphire_radeon_rx_470_nitro_8_gb-4169/6 .

Seems that it does around Gtx 950 performance, but in DX12 same as or higher then Gtx 960.

Can't believe I did Sign up on Anandtech forum just so everyone can check this out.

I'm not quite sure how you can tell that the performance is similar to a 950, when the review doesn't include a 950 (as far as I can tell).

Either way the performance of the 460 is equal to 48% of a 480, which is quite decent when it only has 39% as many shaders (don't know what the core frequency is though). In comparison the PurePC review had the 460 at 43% of a 480, however this was with aftermarket models, a 4GB 480 instead of 8GB, and with both cards running in silent/quiet mode.
 

USER8000

Golden Member
Jun 23, 2012
1,542
780
136
I'm not quite sure how you can tell that the performance is similar to a 950, when the review doesn't include a 950 (as far as I can tell).

Either way the performance of the 460 is equal to 48% of a 480, which is quite decent when it only has 39% as many shaders (don't know what the core frequency is though). In comparison the PurePC review had the 460 at 43% of a 480, however this was with aftermarket models, a 4GB 480 instead of 8GB, and with both cards running in silent/quiet mode.

It has very variable performance - the Gainward Phantom GTX960 is one of the best GTX960 cards especially with its massive cooler,and in some games the RX460 is still matching it but in others it gets thrashed.

GTAV for one,is very surprising for me.
 
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