Monday, August 8, 2016

Some AMD Zen leaks (ES clocks, PCI info, Rambus DDR PHY, Roadmaps) [UPDATED]

Update: Small corrections, comments on PCIe dump, AoTS leaks, link to more slides added.
TL;DR: First Zen OPN and PCIe info leaked. Additionally I do a recap of some other recent leaks.

Planet3DNow! forum user "Crashtest" posted a Zen ES OPN and PCI device info (behind the spoiler button), which somehow landed in the CPU-Z and SIV databases.

So the OPN is "1D2801A2M88E4_32/28_N". Using the already known schema, "D" stands for desktop, "28" for the base clock frequency (2.8GHz), the first "8" of "88" for the number of cores. And more clearly, "32/28" stand for turbo boost frequency (3.2GHz), and the base clock again (2.8GHz). This matches the information given for the 8C DT ES in an AnandTech forum posting recently:
"The most exciting part is core clock. The 8c/95W variant's base clock is 2.8GHz, all core boost is 3.05GHz and maximum boost is 3.2GHz."
This hasn't been confirmed in this way before (except that I heard it is true). So until now there was nothing available, that actually supported the information posted there.

The PCI information found in the SIV database looks as follows:
Bus-Numb-Fun IRQ Vendor-Dev-Sub_OEM-Rev Class (9:255) Vendor and Device Description Showing 39 of 39
[0 - 00 - 0] 1022-1450-14501022-00 Host Bridge AMD
[0 - 01 - 0] 1022-1452-00000000-00 Host Bridge AMD
[0 - 01 - 2] 1022-1453-00000000-00 PCI Bridge (0-1) x4 (x4) AMD
[0 - 02 - 0] 1022-1452-00000000-00 Host Bridge AMD
[0 - 03 - 0] 1022-1452-00000000-00 Host Bridge AMD
[0 - 04 - 0] 1022-1452-00000000-00 Host Bridge AMD
[0 - 07 - 0] 1022-1452-00000000-00 Host Bridge AMD
[0 - 07 - 1] 1022-1454-00000000-00 PCI Bridge (0- x16 (x16) AMD
[0 - 08 - 0] 1022-1452-00000000-00 Host Bridge AMD
[0 - 08 - 1] 1022-1454-00000000-00 PCI Bridge (0-9) x16 (x16) AMD
[0 - 20 - 0] 1022-790B-790B1022-59 SMBus Controller AMD
[0 - 20 - 3] 1022-790E-790E1022-51 ISA Bridge AMD
[0 - 20 - 6] 1022-7906-79061022-51 SD Host DMA Controller AMD
[0 - 24 - 0] 1022-1460-00000000-00 Host Bridge AMD Summit Ridge (K17) Processor Link Control
[0 - 24 - 1] 1022-1461-00000000-00 Host Bridge AMD Summit Ridge (K17) Processor Address Map Configuration
[0 - 24 - 2] 1022-1462-00000000-00 Host Bridge AMD Summit Ridge (K17) Processor DRAM Controll
[0 - 24 - 3] 1022-1463-00000000-00 Host Bridge AMD Summit Ridge (K17) Processor Miscellaneous Control
[0 - 24 - 4] 1022-1464-00000000-00 Host Bridge AMD Summit Ridge (K17) Processor Link Control
[0 - 24 - 5] 1022-1465-00000000-00 Host Bridge AMD Summit Ridge (K17) Processor Function 5 Configuration
[0 - 24 - 6] 1022-1466-00000000-00 Host Bridge AMD Summit Ridge (K17) Processor Function 6 Configuration
[0 - 24 - 7] 1022-1467-00000000-00 Host Bridge AMD Summit Ridge (K17) Processor Function 7 Configuration
[1 - 00 - 0] 1022-43B9-11421B21-02 XHCI Controller x4 (x4) AMD Promotory USB 3.1 XHCI Host Controller
[1 - 00 - 1] 1022-43B5-10621B21-02 SATA (AHCI 1.0) x4 (x4) AMD
[1 - 00 - 2] 1022-43B0-00000000-02 PCI Bridge (1-2) x4 (x4) AMD
[2 - 00 - 0] 1022-43B4-00000000-02 PCI Bridge (2-3) x1 (x1) AMD
[2 - 01 - 0] 1022-43B4-00000000-02 PCI Bridge (2-4) x1 (x1) AMD
[2 - 02 - 0] 1022-43B4-00000000-02 PCI Bridge (2-5) x1 (x1) AMD
[2 - 03 - 0] 1022-43B4-00000000-02 PCI Bridge (2-6) x1 (x1) AMD
[2 - 04 - 0] 1022-43B4-00000000-02 PCI Bridge (2-7) x0 (x4) AMD
[3 - 00 - 0] 14E4-1687-168714E4-10 Ethernet Controller x1 (x1)Broadcom NetXtreme BCM5762 Gigabit Ethernet PCIe
[3 - 00 - 1] 14E4-1640-164014E4-10 SD Host DMA Controller x1 (x1)Broadcom
[5 - 00 - 0] 1002-68F9-010E1002-00 VGA Controller x1 (x16) AMD Cedar Pro [Radeon HD 5450/Radeon HD 6350] [GPU-0]
[5 - 00 - 1] 1002-AA68-AA681002-00 High Def Audio x1 (x16) AMD Cedar/Park HDMI Audio
[8 - 00 - 0] 1022-145A-145A1022-00 Other (0x130000) x16 (x16) AMD
[8 - 00 - 2] 1022-1456-14561022-00 Other Encryption x16 (x16) AMD
[8 - 00 - 3] 1022-145C-145C1022-00 XHCI Controller x16 (x16) AMD
[9 - 00 - 0] 1022-1455-14551022-00 Other (0x130000) x16 (x16) AMD
[9 - 00 - 2] 1022-7901-79011022-51 SATA (AHCI 1.0) x16 (x16) AMD
[9 - 00 - 3] 1022-1457-14571022-00 High Def Audio x16 (x16) AMD

Total of 7 PCI buses and 39 PCI devices in 0.040 seconds.
Source: SIV database

Update #1: As "Crashtest" explains in a later posting, the respective Summit Ridge system (w/ Myrtle mainboard) seems to have at least 36 PCIe lanes. According to him, the listed configuration seems to be a bit chaotic. BTW, "Promotory" should actually be written "Promontory".

Update #2: Thanks to the OPN, Planet3DNow! user "BoMbY" identified some Ashes of the Singularity benchmark results, which were run on two different Zen engineering samples. One had the same OPN, while the other had a slightly different one ("2D" instead of "1D"). As they've been removed from the AotS database, you can find them archived here.

Next there was a BitsAndChips article about the likely provider of the DDR4 PHY found on Zen based processors: Rambus. That speculation is based on the given details the author learned from his sources, which fit well to what Rambus recently announced regarding their 3200 Mbps DDR4 PHY available for Globalfoundries' 14LPP process. You can learn a bit more about their technology here.

Another interesting bit of info are two AMD roadmaps, which look real. But as one recently could see with this Athlon X8K die shot posted at Reddit, even the quality of die shot fakes can be rather high (also see my analysis there). In that case the creator of the die shot wrote me, that he actually just tried to check the viability of such a product regarding die size and thus processing costs. Back to the roadmaps.

For 2017 they show:
  • Raven Ridge APUs for the FP5 socket (4C/8T, <=12 gfx CUs, 4-35W TDP)
  • higher TDP models (65-95W) for the AM4 socket (also 4C/8T and an unknown number of gfx CUs)
  • also AM4 based Summit Ridge CPUs with 8C/16T and TDPs of 65 to 95W
Most of the boxes are marked as "AMD PRO", which usually stands for a separate series of products targeted at commercial customers. Due to special certification programmes, perhaps also additional testing, and of course the integration in ready to ship OEM hardware, these products might hit the shelves a bit later than consumer variants.

There is also a notable difference in the listed processes: "14nm SoC" for Raven Ridge, and "14nm FinFET" for Summit Ridge. I assume, that the "14nm SoC" process might refer to a different metal layer density, as recently covered in an article by Hiroshige Goto (Japanese) about APUs and AMD's FinFET efforts. Thus "FinFET" could stand for less dense lower metal layers, which would allow for somewhat higher clock speeds due to lower wire delays.

A note on the slides: I saw some unusual pixel patterns and spacings in the "14nm SoC" and "14nm FinFET" boxes (aside from different sizes). I'd expect a scaled, interpolated PowerPoint slide to show subpixel positioning of single characters. But I saw only pixel exact 1 or 2 pixel spacings with exactly similar interpolated pixels around the characters. I'll try to reproduce this in PPT.

In the end, these slides (if real) might mean, that there is no desktop Zen available in 2016 (even not as the promised sampling at the end of the year). But that is not for sure, yet. My own GCC patch based launch speculation gave a rough launch date range between 10/2016 and 05/2017.

Update #3: You can find the complete two slides and an additional one here. These don't look like being faked, although some details look a bit awkward. But this might be attributed to a smaller target audience (I suppose decision makers with more interests in dates and specs).


Seven Quinn said...


I was wondering whether this could also be a possibility for what the Zen S/N are referring to based on the leaks and rumors that have been floating around.

1D - Desktop Variety

28 - Base Clock Speed

01A - Model & Stepping

2M - 2 Multi Core Modules (4 + 4 Core Chips Joined)???

88 - 8 Physical Cores | 8 HT Cores

E4 - Revision Number

32/28 - Base/Boost Frequency

N - Retail Ready Check / Final Validation Check ???

Dresdenboy said...


I found this nice page for help with decoding the OPNs: This should explain most of the numbers.

The "1" before "D" (which is for desktop) might be more related to some ES stage, I suppose. "Z" could be the final one based on that.

Logical cores/total threads are not encoded. Thanks to the new Zauba leak, we know, that this ES should have 16 threads capability.

The "N" is the only new component. It might just mean to have no gfx.

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