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[Fudzilla] Micron's answer to HBM - the company to double the speed of GDDR5 in 2016 (possibly named GDDR6) - Page 8

post #71 of 119
Until HBM2/1 matures, I see GDDR5X doing well. Personally dont see HBM's really taking off till we see PCI 4.0(or what it may be) and AMD/Nvivida next-gen archecture pushing so much more bandwidth/latency I dont see pci3 holding up at all.

Just no way Im spending $500+ on a new gpu on current pci3. At most a dieshrinked 390(GDDR5X) hopefully lot less wattage or beefed up GTX 960 Ti(GDDR5X) with some real balls. Hopefully pci4 will have better latency, not just higher bandwidth, this more and more bandwidth at the cost of latency is getting to be a sad joke.
post #72 of 119
Gimmer cheaper GDDR6 cards in 2016 that come out earlier rather than more expensive HBM cards that come out later in 2016 thumb.gif

While it is nice to have better memory and an important step we have to take, as a single GPU user with a 1080p/1440p monitor memory bandwidth is not the limiting factor for me right now. For multi GPU multi screen users this might be different though.

My 3 nemesis (is nemesis the plural of nemesis?) are :

- Raw GPU performance
- Raw CPU performance
- bad PC ports

biggrin.gif
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post #73 of 119
Quote:
Originally Posted by MadRabbit View Post

And since this isn't out, this is also theoretical.
Well, sure. In some places. I can't argue that but at 0.05 cents /kWh...really can't see a problem. But that's subjective as where you live smile.gif

Dude, I'll just tell you that in Nicaragua I used to pay 200$ for 54 Kilowats a Month... Kay
post #74 of 119
Depending how its priced, Will probably see GDDR5 on mid range GDDR5X on high range GPUs. HBM2 reserved for flagship cards.
High quantity of GDDR3 thrown on low range cards.
post #75 of 119
HBM is an expensive technology, diifficult to manufacture that dont 't guarantee success (look at Fiji),
Maybe we'll see HBM for highest priced GPU and GDDR5X for the others, economically it will make sense.
post #76 of 119
Quote:
Originally Posted by knightsilver View Post

Hopefully pci4 will have better latency, not just higher bandwidth, this more and more bandwidth at the cost of latency is getting to be a sad joke.

Real latency isn't really getting worse, it is more like latency has not been improving significantly while bandwidth has. Still, it would be great to improve latency. smile.gif

Also PCI-E 4.0 will probably not change real latency significantly either. tongue.gif
Quote:
Originally Posted by iLeakStuff View Post

HBM1 4096bit 512GB/s: ~25W less than 4GB GDDR5 (290X). Source: Anandtech.

That quote is for total card power isn't it? I don't think AMD improved the efficiency of GCN much if at all and the Fury has 27% more shaders than the 290X.
Quote:
Originally Posted by iLeakStuff View Post

The only memory that makes sense here vs GDDR5X is HBM2. But unless that is cheap like GDDR5X, why use it? Would you notice 1000GB/s vs 660GB/s? We saw no difference in performance for Fury X vs 980Ti despite offering 512GB/s vs 330GB/s. Which is exactly the same ratio as GDDR5X vs HBM2 (55% more bandwdidth)
For gamers it will most likely dont matter at all what Nvidia design their cards with. For computation, absolutely.

I assume the power requirements will go up for GDDR5X v.s. GDDR5, twice the bandwidth never comes for free using basically the same technology.
Quote:
Originally Posted by iLeakStuff View Post

We heard about GP100 and GP102 earlier in a leak: What if GP100 is for Tesla/Quadro only and comes with HBM2. While GP102 is for Geforce cards and comes with GDDR5X?

To me it looks like HBM2 and GDDR5X will have a relationship similar to HBM1 and GDDR5, though at 16GB HBM2 has 4x the max capacity of HBM1, compared to only double when using GDDR5X instead of current GDDR5.

HBM2 offers ~1000MB/s for ~60W while GDDR5X offers ~680MB/s for ~80W (maybe more). HBM2 will max out at 16GB while GDDR5X will max out at 24GB, with HBM2 also being quite a bit more expensive per GB.

That said, I would be happy to buy a GP102 with 12GB of GDDR5X next year. Of course it depends on how the entire package works, but I think GDDR5X would be good enough given a well balanced architecture. Double the current bandwidth sounds fine to me, especially if it keeps the price from increasing; 16GB of HBM2 would still be better if I could afford it. tongue.gif
Edited by Asmodian - 12/13/15 at 11:40pm
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post #77 of 119
Quote:
Originally Posted by Asmodian View Post

I assume the power requirements will go up for GDDR5X v.s. GDDR5, twice the bandwidth never comes for free using basically the same technology.

GDDR5X is going down with the power consumption, from 1.5v to 1.35v on the same speeds, and about 30-40% power efficiency. GDDR5X 2GB chips will take about 4.2W, while HBM2 goes up in power to bit over 5W per 2GB.
So 8GB of GDDR5X running at 7Ghz like the 980 TI, will take a bit less than 17W compared to 20W of the HBM2.

The difference is that the HBM2 will run at 1TB/s and the GDDR5X will run at 672MB/s (it can run faster, but it will require more watt of course). Now if the card isn't going to really utilise the whole speed of that 1TB/s (and my bet is that the mid and low ends cards will not), then most likely GDDR5X will be cheaper and preferred. Just bandwidth per speed isn't the whole story. Someone actually has to really utilise that.

GDDR5X is also going to be smaller than GDDR5 (higher density), so cards will also be smaller. It will also allow bigger access (64MB vs 32MB on GDDR5), and in potential might run faster.

Also don't forget that GDDR5, with it's low bus and low bandwidth, ended up still being faster than HBM1 in terms of assembled cards (FuryX vs 980 TI). So just plain on paper performance means nothing if the card as a whole can't really perform up to the memory potential.
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post #78 of 119
Quote:
Originally Posted by Omega X View Post

That's because you're closer to Russia.

That doesnt matter what so ever. rolleyes.gif

And no, he is not.
Edited by MadRabbit - 12/14/15 at 2:06am
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post #79 of 119
Quote:
Originally Posted by MadRabbit View Post

Well, sure. In some places. I can't argue that but at 0.05 cents /kWh...really can't see a problem. But that's subjective as where you live smile.gif
Did you count your total bill or just supply rate? I cant go lower $100 bill for NYC apartment using about 200 kW. Last bill was $109.02 for 191kW - 0.57 cents
 
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post #80 of 119
Quote:
Originally Posted by ASSSETS View Post

Did you count your total bill or just supply rate? I cant go lower $100 bill for NYC apartment using about 200 kW. Last bill was $109.02 for 191kW - 0.57 cents

Total bill. I usually use over 400kW a month and the bill comes somewhere 20 euros.
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