Along with today’s announcement of the OEM mobile Radeon M300 series, AMD has also announced the OEM desktop Radeon 300 Series. This was a rather low-key launch with only a very brief press release on the matter along with AMD updating the OEM Radeon website, and as one might expect this is for good reason.

We’ve been through this event once before – most recently with the OEM HD 8000 series – so our regular readers will know the drill. Whether or not GPU manufacturers have new GPUs, OEMs will want new parts to sell, which leads to GPU manufacturers engaging in rebranding and subtle spec changes to create new parts to sell under a new series name. In AMD’s case this is complicated by the fact that they have been updating their GPUs in a piecemeal fashion – Hawaii, Bonaire, and Tonga have all landed at very different times – and AMD is not done yet as they’re going to be launching a new high-end GPU this quarter. So AMD needs a product lineup to include both the new part and their retained parts under a single brand, which leads to another incentive for rebadging.

In any case, as these are OEM parts I advise not reading into the names and specifications too much. AMD’s OEM and Retail parts can be very different at times – and at other times there aren’t any retail parts at all (HD 8000) – so these OEM parts aren’t necessarily indicative of what we’re going to see in retail in the coming months. Though based on AMD’s actions with the Radeon 200 series, we may yet see a similar rebadge happen for the retail 300 series.

AMD OEM Desktop Radeon R9 300 Series
  AMD Radeon HD R9 380 OEM AMD Radeon R9 370 OEM AMD Radeon R9 360 OEM
Was Variant of R9 285 Variant of R7 265 Variant of R9 260 (OEM)
Stream Processors 1792 1024 768
Texture Units 112 64 48
ROPs 32 32 16
Boost Clock <=918MHz <=975MHz <=1050MHz
Memory Clock 5.5GHz GDDR5 5.6GHz GDDR5 6.5GHz GDDR5?
Memory Bus Width 256-bit 256-bit 128-bit
Transistor Count 5.0B 2.8B 2.08B
GPU Tonga Pitcairn Bonaire
Manufacturing Process TSMC 28nm TSMC 28nm TSMC 28nm
Architecture GCN 1.2 GCN 1.0 GCN 1.1

Starting things off, we have the OEM R9 series. Today’s release tops out at R9 380 OEM (I can only imagine AMD is saving 390 for their new GPU), along with the R9 370 OEM and R9 360 OEM. The R9 380 OEM appears to be a variant of the desktop R9 285, which marks the first time that a Tonga card has been released in an OEM configuration. The quoted clockspeeds are identical to the retail R9 285, which means the “up to” GPU clockspeed should result in the R9 380 OEM being perfectly identical to the R9 285 if given its maximum configuration.

Meanwhile for the R9 370 OEM we have a cut-down Pitcairn card, with only 1024 of its 1280 SPs active. This makes it a variant of the retail R7 265, though with a slightly higher maximum GPU clockspeed. Truth be told I’m a bit worried to see a fresh Pitcairn part in 2015; Pitcairn has been a workhorse for AMD, having now survived into its 4th generation of cards. However at over 3 years old and based on GCN 1.0, it lacks more modern functionality such as the ability to decode 4K H.264 video files, AMD’s improved power management technology, and support for AMD’s Freesync technology.

Finally we have the R9 360 OEM. This appears to be a variant of the R9 260 OEM, featuring an AMD Bonaire GPU with only 768 of its 896 SPs enabled. Oddly, the listed memory bandwidth for the part, 104GB/sec, would require 6.5GHz GDDR5 memory given Bonaire’s 128-bit bus. I suspect that may be an error on AMD’s part, though it’s not outside the realm of possibility. In any case the R9 360 OEM also appears to be a regression from the R9 260 OEM; the latter was a fully enabled Bonaire part, whereas this one is not. At the very least it’s GCN 1.1 based, so it will have the newer features that the Pitcairn based R9 370 OEM lacks.

AMD OEM Desktop Radeon R7 300 Series
  AMD Radeon HD R7 350 OEM AMD Radeon R7 340 OEM
Was R7 250 R7 240
Stream Processors 384 384
Texture Units 24 24
ROPs 8 8
Boost Clock <=1050MHz <=780Hz
Memory Clock <=4.5GHz GDDR5
<=4.5GHz GDDR5
Memory Bus Width 128-bit 128-bit
GPU Oland Oland
Manufacturing Process TSMC 28nm TSMC 28nm
Architecture GCN 1.0 GCN 1.0

Up next is the R7 300 OEM series, which is composed of the R7 350 OEM and R7 340 OEM. Both of these cards are straight-up rebadges of AMD’s existing R7 250 OEM and R7 240 OEM parts, and both are based on the same GCN 1.0 Oland GPU. With just 384 SPs these are low cost, low performing parts. The difference between the two is their clockspeeds, with R7 350 being clocked quite a bit higher, whereas R7 340 is clocked lower in exchange for being available as a low-profile card. Unfortunately the memory situation is quite complex here, as these cards can be equipped with either GDDR5 or DDR3; the GDDR5 versions will of course be the much faster versions.

Among its other quirks, Oland lacks a hardware video decoder. So these parts are likely to be paired with low-end AMD Kaveri APUs, possibly for a Dual Graphics configuration.

AMD OEM Desktop Radeon R5 300 Series
  AMD Radeon HD R5 340 OEM AMD Radeon R5 330 OEM
Was Variant of R5 240 Variant of R5 240
Stream Processors 320 320
Texture Units 20 20
ROPs 8 8
Boost Clock <=825MHz <=855Hz
Memory Clock ? GDDR5/DDR3 ? DDR3
Memory Bus Width ? ?
GPU Oland Oland
Manufacturing Process TSMC 28nm TSMC 28nm
Architecture GCN 1.0 GCN 1.0

Finally, for the R5 300 OEM series we have two more Oland parts. These are ultra low end, low-profile single slot parts. AMD does not even publish the GPU bandwidth numbers for these parts, and as a result I suspect these may be 64-bit parts to further cut down on costs. Of particular note, the R5 330 lacks HDMI support, so it’s almost certainly geared towards APAC markets where VGA is still in common use.

Wrapping things up, AMD's press release mentions that these new OEM parts are shipping now. HP is already confirmed to be shipping PCs with these new cards, and we expect other OEMs to ramp up as well as they launch their back-to-school season computers.

Source: AMD

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  • Yojimbo - Thursday, May 7, 2015 - link

    So when will these 400 series retail cards based on a new architecture come out? If you mean in 2016 then you are probably right. Whatever comes out this year is likely to be some sort of GCN rebadge or minor architectural change. So if AMD comes out with a new brand of retail cards in the next few months, it is irrelevant to the point of my post whether they are called 300 series or 400 series. But don't say that *I* am assuming anything, I am only replying to what the OP said: "This doesn't mean retail R9 380 and lesser cards will be rebrands (though, I do think we'll see Tonga at some level, and perhaps a tweaked Hawaii)."
  • Oxford Guy - Thursday, May 7, 2015 - link

    Your attempt at a rebuttal concerning the 8400 GS fails utterly.
  • Yojimbo - Thursday, May 7, 2015 - link

    Your attempt to reply in any relevant or meaningful way to any point I made fails utterly.
  • Oxford Guy - Friday, May 8, 2015 - link

    The truth is what I posted.
  • Yojimbo - Thursday, May 7, 2015 - link

    Although I don't think you were really making such an attempt.
  • Peichen - Thursday, May 7, 2015 - link

    So the only new part will be R9 390/390X depending on if AMD/ATI released 1 or 2 cards. Or maybe 390X will be the new chip and 390 just a rebadged 290X. After all, what to do with 290X if 380 is 285?

    BTW, I am very very confused with AMD's nomenclature
  • D. Lister - Thursday, May 7, 2015 - link

    I'm guessing then the 390 would be a 290 on a new, more optimized PCB with 6-8 GB HBM. Overall improving power efficiency over its predecessor, in performance the X variant would probably fall between the 980 and the Titan X.
  • ImSpartacus - Thursday, May 7, 2015 - link

    We're only getting 4gb of hbm per card in these until designs.

    The "special sauce" that allows AMD to exceed that has been rumored to simply be a multi gpu setup.
  • xthetenth - Thursday, May 7, 2015 - link

    It's perfectly possible and makes a ton more sense to just have multiple stacks on an interposer like every sane rumor indicates.
  • D. Lister - Thursday, May 7, 2015 - link

    For the power saving that HBM can bring, even 4gb is quite acceptable as long as the 390/390X duo can effectively find the ideal performance/dollar sweet spot to topple the 980/980Ti. Although since the ability of DX12 to use unmirrored VRAM in multi GPU setups doesn't help anything pre-DX12, which is basically everything that is actually available right now, I sincerely hope they can find a way to push past this 4gb limit for their flagship models.

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