XPS 8930, Dell RX580 is actually a RX480?

Incorrect and not fraud. The XPS 8930 sells with the OEM (original equipment manufacturer) customized JTPTC AMD Radeon RX 580 hardware purchased from AMD for Dell. This OEM card has our Dell vBIOS on it. You cannot compare our OEM video cards with retail cards specifications.

1. In fact, this card use a 6 pin connection, have a boost clock of 1266MHz, and a TDP of 110 W. So it seems like  they are deliberately re-badged from RX 480's, but the cards have the limited voltage, power draw, and speeds of low-end RX 480's. 

2. The RX 580 is effectively a better binned RX 480. The silicon has improved slightly, allowing for higher overclock's and stability at lower voltage for the same clock speeds. 

3. The launch date for RX 580 is April, 2017, while the card is made early than this date.

4. The RX 580 should based on Polaris 20 (AMD call it: Polaris Evolved), where the card on my machine is Polaris 10

580 & 570 are versions of the 400 series that are stable at higher clock and voltages. only difference is 5-10% better performance, but a quite a bit more power usage.Therefore the RX580 is the same Polaris chip as the RX480, but it has a higher core clock where the 580 is basically a 480+ . AMD rather than releasing a 480X are simply re branding as a 580.

14nm FinFET LPP Technology is Featured on Polaris 21, Polaris 20,  Polaris 12, Polaris 10 GPUs

Basically Polaris ≥ Hawaii, Vega ≥ Fiji

What does the latest GPU-Z say?

https://www.techpowerup.com/gpuz/

http://gpu.userbenchmark.com/Compare/AMD-Radeon-RX-580-vs-AMD-RX-480/m268793vs3634

https://www.youtube.com/watch?v=TedeM61NtSw

Thank you for your posting, @speedstep

I checked the card on my machine. The results shows that this card have a boost clock of 1266 Mhz, and a TDP of 110 W (it uses a 6 pin connection). It also shows that this card is based on Polaris 10. 

The RX580 should based on Polaris 20, AMD call it: Polaris Evolved. According to AMD, though still is 14nm FinFET, the silicon has improved slightly, allowing for higher overclocks and stability at lower voltage for the same clock speeds. 

"The RX580 should based on Polaris 20,"

Polaris 10 features 2304 stream processors
36 Compute Units  
and supports up to 8GB of GDDR5 memory
on a 256-bit memory interface.

This is what the OEM RX580 has.

I see no AMD spec page that specifically says an

RX580 MUST BE Polaris 20.

Under Features they BOTH SAY

https://www.amd.com/en/products/graphics/radeon-rx-580
3rd Gen 14nm Process Technology

https://www.amd.com/en/products/graphics/radeon-rx-480

3rd Gen 14nm Process Technology

You are demanding RETROACTIVELY to have

14LPE (Low Power Early) - Early time-to-market version

Replaced with

14LPP (Low Power Plus) - Enhanced version with higher performance and lower power

On an OEM Card.

This isn't happening and won't be

The release date is 2017, RX580 from other vendors. 

This is DELL RX580, the release date is 2016, and the clock is 1266 MHz

​Today AMD (NASDAQ: AMD) introduced the Radeon™ RX 500 series, a new line of graphics cards featuring a powerful combination of improved game performance, higher clock speeds1, and a refined 2nd generation Polaris architecture, giving PC gamers the best reasons yet to upgrade their graphics.

comes from AMD official news about RX 500 series.

https://www.amd.com/en-us/press-releases/Pages/radeon-rx-500-series-2017apr18.aspx

This figure graphics driver Radeon Software Crimson Edition

you can also google RX580 to see the results. here I list some posts related to this.

https://en.wikipedia.org/wiki/AMD_Radeon_500_series

https://www.pcper.com/reviews/Graphics-Cards/Radeon-RX-580-8GB-Review-Polaris-Populism

https://videocardz.com/68450/amd-radeon-rx-500-series-official-specifications-and-performance-leaked

https://www.techpowerup.com/232246/amd-polaris-20-xtx-xl-chips-powering-the-rx-500-series-confirmed

The OEM Dell Card Says Ellesmere REV C7

The cards you are harping on say Ellesmere REV E7

 Ellesmere Baffin Greenland and other Code names are hidden.

Point being they are ALL Ellesmere

“Ellesmere” is in both market segments, such as high-end and mainstream.

You cannot insist that the clock speed for DELL OEM be the same as Retail Cards.  The SAME  number of Shaders 2304 unified. Compute Nodes and ROPS/TMU 32/144  and GDDR Ram is the same.

There is Absolutely NOTHING in that chart that says MUST BE Polaris 20.

There is a difference between OEM (unboxed, tray, or white-box) and Retail (boxed)

OEM cards often include lower speed memory (such as 6ns instead of 5.5ns, 5ns instead of 4.5ns, 4 instead of 3.4), and are often clocked slower.  This is by design.

The Asus card has Greyed out Clock which you seem to be keying on.

0 Mhz Clock ???

Usually Ellesmere REV C7 is used for RX480. See the pic above.

Please read my posts carefully and do not just read the pictures. I have attached the links of AMD official news and other links. Please read them.

Polaris 10 is the first generation. However, from AMD official news for rx500 series: improved game performance, higher clock speeds1, and a refined 2nd generation Polaris architecture. 

Furthermore, could you explain why DELL RX580 have the same clock with RX480? While AMD says rx580 has a higher clock speed.

I also wonder why the graphics card is named as RX580, while the video chipset is still identified as RX480.

There is no need to argue for the credibility of gpu-z. 

You have no statement from AMD that the DELL OEM RX580 is Polaris 20.

Clock rates ARE DIFFERENT in all of your pictures.

The number of shaders,  the number of TMU / ROPs , the amount of ram is THE SAME and they are ALL Ellesmere.

Your insistence on OEM cards having RETAIL Clock Rate and Chipset Revision Retroactively is not happening and will never happen.

You have no case.

Cards do not time travel into the future and pick up revisions.

I have posted all the facts but you select not to see them. 

Though the clocks are different, it is obviously that all of the posted figures have a clock larger than 1266 for RX580, excepting DELL.

Please don't just blow off my questions in my last post.

The following figure is from AMD official website, you can see the TBP should be 185W for RX 580 to fulfill the performance requirement. Why the TBP for DELL RX 580 is only 110W and use a 6 pin connection?  Note that this is not a suggestion, this is a requirement. 

"this is a requirement"

Correct, for retailers (XFX, Asus, MSI, PowerColor) who make their own branded retail RX 580 and sell them in retail. But that does NOT apply to OEM manufactured video cards. You cannot compare our OEM video cards with retail cards specifications. Bottom line, you bought an OEM PC with OEM hardware. Dell is not going to refund you the price of our OEM video card and then sell you a retail video card. You have three choices =
* Keep the PC and current video card
* Remove the current OEM video card and install a retail video card
* Return all inside the first 30 days from the invoice date for refund

I have some questions related to refund, they may include some personal information, can we talk about them through email? 

you have a good system I have a dell xps 8930 with a 8600k swapped out stock cooler with arctic freezer 11 lp and a rx 580 but I got a msi rx 580. one thing to remember about oem dells and hp and any other oem. if their systems include an oem gpu it will be different than cards from evga, asus,msi, gigabyte and so on. oem cards are always lower clocked. If you don't want to build a system I would get a refund get a  dell xps with out a gpu and get a third party card. 

All refund questions must go directly through Order Support.