Spotted yesterday by Heise.de, AMD has silently lowered the specifications of the Radeon RX 560 to encompass parts with 14 CUs (896 Stream Processors), allowing them to be sold alongside standard 16 CU (1024 SP) parts. The net effect of this change is that it allows Radeon RX 460-level products to be sold as Radeon RX 560 cards.

With the RX 500 series Polaris family refresh, AMD based the Radeon RX 560 on a fully enabled Polaris 11 GPU, meaning all 16 of its CUs were active. By contrast, AMD never shipped a fully enabled Polaris 11 part under the 400 series (excluding the Macbook Pro specific Radeon Pro 460), so the RX 560 was a notable step up from the 14 CU Radeon RX 460. And while the logistics of chip binning meant that AMD never stopped producing 14 CU GPUs, once AMD did opt to sell a 14 CU part under RX 500 series lineup, it was introduced as the regionally-limited RX 560D.


July (top) vs Current (bottom) RX 560 GPU Specifications on AMD.com

However as it turns out, at some point recently in the past, AMD has also approved selling 14 CU parts as standard RX 560 cards. As discovered by Heise.de, sometime within the past few months the Radeon RX 560 product page on AMD’s website was silently changed to include the lowered 14 CU specifications, with July still listing “16 CUs” only. The page does not note any change and still lists 4/18/17 as the full launch date, so short of knowing what to look for, the lowered specifications are practically a footnote.

(Revised) AMD Radeon RX 560 Specification Comparison
 AMD Radeon RX 560 (New)AMD Radeon RX 560 (Old)AMD Radeon RX 460AMD Radeon R7 360
Compute Units14/16 CUs
(896/1024 SPs)
16 CUs
(1024 SPs)
14 CUs
(896 SPs)
12 CUs
(768 SPs)
Texture Units56/64645648
ROPs16161616
Base Clock<=1175MHz<=1175MHz1090MHzN/A
Boost Clock<=1275MHz<=1275MHz1200MHz1050MHz
Memory Clock7Gbps GDDR57Gbps GDDR57Gbps GDDR56.5Gbps GDDR5
Memory Bus Width128-bit128-bit128-bit128-bit
VRAM2GB/4GB4GB4GB2GB
Transistor Count3B3B3B2.08B
Typical Board Power60-80W60-80W<75W100W
Manufacturing ProcessGloFo 14nmGloFo 14nmGloFo 14nmTSMC 28nm
ArchitectureGCN 4GCN 4GCN 4GCN 1.1
GPUPolaris 11Polaris 11Polaris 11Bonaire
Launch Date~10/201705/201708/08/201606/18/2015
Launch Price$99$99$119$109

The consequence of this change is that AMD and its partners can now market and ship lower-performing graphics products labelled under the same “RX 560” branding. And in fact they appear to be doing so right now, not only in an OEM context via a currently shipping PC as noted by Heise.de, but also cards from AIB partners. Sapphire RX 560s now have a separate 896 SP SKU part number (11267-18) but still branded the “Pulse Radeon RX 560,” while ASUS has a “RX 560 EVO OC” 896 SP part. The PowerColor Red Dragon RX 560 4GBD5-DHA product page only specifies a lower clockspeed but its 896 SP count was revealed on its Newegg listing.

Which brings us to the next point of how this does translate in terms of consumer-facing e-tailers. Amazon is directly selling both ASUS cards without SP counts and only referring to the GPU as RX 560 EVO, while Amazon UK is selling the Sapphire card without any indication of 14 CUs. Additionally, Newegg is directly selling three 896 SP RX 560s, with the SP count in the description: the PowerColor Red Dragon 4GBD5-DHA (and the 4GBD5-DHAM brown box variant), along with the ASUS ROG Strix EVO Gaming OC. Based on listing release dates, this 896 SP RX 560 situation has existed since at least the beginning of October.

Putting this into performance numbers, in a heavily compute or texturing-limited scenario, these lowered specifications would allow for cards around 12% slower than cards built to AMD’s original specifications. In effect, AMD is now able to ship the lower-performing RX 460-like cards, but has done so in a very non-transparent, consumer-unfriendly manner.

Now it should be noted that rebrands like this are not uncommon with OEM parts and the lowest-end retail SKUs, and that goes for both NVIDIA and AMD. OEM cards in particular are often used to burn off excess chips or other inventory that’s just sitting around. What is atypical here is that it appears that AMD has silently swapped out the specifications of a mainstream ($100+) retail product; one that is already shipping. And if what we’re noticing here with AIB partners follows, then the change is indeed directly linked to near-silent downgrades, albeit slight, of graphics parts that consumers would otherwise believe are higher-performing.

We have reached out to AMD for any clarification, but we have not heard back from them as of press time.

Source

This  Source Code for the Apollo 11 Mission is Available Online