AMD RX 300 series rumours

So browsing http://www.overclock3d.net/articles/gpu_displays/amd_rx_300_series_specs_revealed/1, I came across some specs rumours about the next generation cards from AMD.

Seeing the 4092bit memory configuration for the R9 390(x) cards, I wonder what speed they will run at. Seeing the potential for some extreme bandwidth there. Though I doubt it will happen.

The most interesting change in AMD's R9 390 series, apart from the massive GPU core count is the change over to High Bandwidth memory, which will give higher performance and lower power consumption than GDDR5 memory. The move to HBM will be a very welcome change as 4K become more and more popular and ever more affordable. Hopefully the GCN 1.3 Architecture will provide us with some efficiency improvements as the AMD R9 290 series was already rwell known for it's high temperatures and large power consumption.

I hope this doesn't turn out to be an even more extreme leafblower than their current top line cards. As they will now take the spot 380(X). Do you think AMD will put out some decent cards this time?

It's very exciting to see this 380x and to see Nvidia's response. Nice to see the GPU moving forward at last.

Cool - I need a new GPU and am waiting for the chips to fall on these things before deciding.

390 and 390x should be 6-8GB

it does not make sense. Why would they use the older GCN 1.1 and 1.2 architecture in 370 and 380 series ( and probably the series that will sell most among enthusiasts )

370 and 380 series will be rebrands.

I read also rumors for 1 more GPU between 380X and 390, cause the gap could be too high...

But rumors are just... rumors.

8GB maybe but not 6GB.

1st gen HBM can be 4x1GB VRAM. So 4GB and maybe 8GB etc etc...

I find this surprising too. AMD likes to have ample VRAM. To have only 4 GB with the push for 4K is questionable to say the least.

Actually the source of this article is from Videocardz.

We still remain skeptical about 4096 Stream Cores in Fiji. However, if that’s true, then we will be seeing a huge gap between Fiji and Hawaii. That said, I wouldn’t be surprised to see a third Fiji model, which I’m calling R9 385X ‘The Gap-Filler’. Just remember, this scenario only makes sense for full Fiji with 4096 cores. Otherwise (and I think more likely), there won’t be any large gaps between 390 and 380 series. Personally I don’t think Fiji has more than 60 CUs, but well, hopefully I’m wrong.

AMD Radeon Rx 300 Series (Speculation)
	GPU	Possible Specs	Possible Launch Date
AMD Radeon R9 395X2	Bermuda (Fiji x2)	GCN 1.3; 8192 (?) Cores; 8192-bit 8GB HBM	Q4 2015
AMD Radeon R9 390X	Fiji XT	GCN 1.3; 4096 (?) Cores; 4096-bit 4GB HBM	Q2 2015
AMD Radeon R9 390	Fiji PRO	GCN 1.3; 3840 (?) Cores; 4096-bit 4GB HBM	Q2 2015
AMD Radeon R9 385X	Fiji CE (?)	GCN 1.3; 3328 (?) Cores; 2048-bit 2GB HBM	(?)
AMD Radeon R9 380X	Grenada XTX (Hawaii)	GCN 1.1; 2816 Cores; 512-bit 4GB GDDR5	Q2 2015
AMD Radeon R9 380	Grenada PRO (Hawaii)	GCN 1.1; 2560 Cores; 512-bit 4GB GDDR5	Q2 2015
AMD Radeon R9 370X	Tonga XT	GCN 1.2; 2048 Cores; 384-bit 3GB GDDR5	Q2 2015
AMD Radeon R9 370	Tonga PRO	GCN 1.2; 1792 Cores; 256-bit 2GB GDDR5	Q2 2015
AMD Radeon R9 360X	Trinidad	GCN 1.3; (?) Cores; 256-bit 2GB GDDR5	Q1 2015
AMD Radeon R9 360	Trinidad	GCN 1.3; (?) Cores; 256-bit 2GB GDDR5	Q1 2015

Radeon R9 395X2 “Bermuda”

Starting with Bermuda. You probably heard this name before, but no one was certain if Bermuda is the actual flagship GPU or something else. Well as a matter of fact Bermuda could actually be the Vesuvius successor (R9 295X2). Radeon R9 395X2 would be a direct competitor to rumored GTX 990 (likely dual-GM204).

Radeon R9 390(X) “Fiji”

According to 3DCenter, Fiji is “confirmed” as next flagship GPU. The R9 390X will likely be powered by Fiji XT, whereas R9 390 with Fiji PRO. Fiji-powered graphics cards are said to be the first with High-Bandwidth-Memory on board. NVIDIA will possibly adopt HBM with Pascal, so we are looking at months, or maybe even years, of AMD leadership in this technology.

Radeon R9 380(X) “Grenada”

I think it was quite obvious Hawaii, which was released in late 2013, would not be forgotten in upcoming 300 series. The rumor has it that Hawaii will be renamed to Grenada. Does it mean architectural changes? Likely not, but we expect Grenada to be more power efficient, and configured with higher clock speeds.

Radeon R9 370(X) “Tonga”

Tonga was first released with Radeon R9 285. AMD had plans to release R9 285X (this is not a rumor), however due to GTX 970 announcement, those plans had to be changed. The full Tonga is actually equipped with 384-bit interface, so R9 370X should launch with 3GB on board. We are looking at potential GM206 competitor here.

Radeon R7 360(X) “Trinidad”

Trinidad is Curacao (Pitcairn) replacement expected to launch with Radeon R7 360 series. The only information we have is limited to memory configuration of 256-bit and 2GB frame buffer. Additionally, Trinidad may be the first card of Radeon 300 series, as it’s currently planned for March (according to VR-Zone).

I was thinking posting it too, but there are too many rumors and they are changing (like the 7970 with the XDR VRAM...) in the final product...

Maybe 8 as previously stated by someone else. Don't think 6GB will work. Indeed if they jump up to 8GB RAM, I might get one, later another 390X. I'll put a waterblock on it so heat shouldn't be a problem.

Maybe 8 as previously stated by someone else. Don't think 6GB will work. Indeed if they jump up to 8GB RAM, I might get one, later another 390X. I'll put a waterblock on it so heat shouldn't be a problem.

Waiting for that 390X and getting two of them to upgrade from 7970 Trifire. Was going to go Nvidia but meh, upgrade jump not worth it right now and 980Ti and Titan II will be overpriced like usual.

Doubt that the 390x will be priced lower then you think remember the release price of the 7970? Expect near a $600 price tag,

But the reason why 4gb is the current limit is because of the 1st gen HBM stack limit. 2nd gen is suppose to allow more then 4gb per module

$550 is fine. I'll buy two at that price.

Very disappointed about the 370(x) 380(x) rebrands. Isn't the Hawaii family "volcanic" in terms of heat and power consumption? Seems very inappropriate for (upper) midrange cards, especially considering Nvidia's recent power conservation gains. Maybe with the 4xx series we'll see some proper midrange offerings with the new memory system.

I am going to wait until Pascal comes out and see what happens from there.

Hopefully by 2016 games will be demanding enough to warranty having these new GPUs.

The only ones from the 3xx family of AMD worth caring about are the 390 and 390x.

But I will wait until 2016 when they iron things out with the 4xx series.

It's exactly what I'm thinking. I hope this info is bogus, but I have a feeling that it's real. This HBM thing may still be too expensive for midrange to have competitive price. I guess if the price is low enough I might even bite, but GTX 970 looks much more attractive to me. Or GTX 960Ti, if it will have the same silicon. And I'm saying this as a neutral guy in terms of brand preference, when it's time to upgrade I go for the best deal.

Most likely, GDDR4 and GDDR5 were high-end only the first generation they appeared as I recall.. Although a top end AMD card in 2008 was only $300 (really miss those prices). My big fear is that AMD pulls the same rebranding stunts for the 4xx series and we're once again left with mid-range cards that can double as space heaters.

So they release 8GB 290X and with new gen to continue with 4GB? Waaaw! I hope, these rumors aren't true.

Its the current limits of 1st gen HBM, 2nd gen will allow 16gb or more. Right now their limited to 4 hi, 2016 HBM will allow 8hi stacks, but also by then memory density will be much greater.

Well they still got the same amount of VRAM as nVidia does though. However this might make me go for full sized Maxwell when I upgrade in a year or so.

Problem is that, Even with the 390x being upto 50% faster then the 290x the 4gb buffer is still not enough for 4k gaming, let alone max settings above 1080 in some cases.

@04dcarraher: That I know. We can always hope they release some 8GB versions of those cards not so long after they are initially released.

400 series will have it. First gen HBM is limited to 4gb it seems.