An oversized circuit board with four AMD Radeon RX 470 graphics chips and 32GB of GDDR5 memory has appeared in photos on X. It plugs into a single PCIe slot. It is most likely a custom mining card, not a lost AMD gaming product.
The images came from X user GOK, who posted them as @GOKForFree on X and asked whether this might be the biggest PCIe graphics card in the world. Nobody has confirmed that claim. VideoCardz talked to the user about the board’s markings.
What the photos show
The board is extra wide. Notebookcheck notes it looks much larger than a motherboard visible in the background of one photo. Here is what the published reports identify:
- Four GPU packages in a 2×2 layout. The chips are bare, with no heat spreader, according to Notebookcheck.
- Each GPU has its own power circuitry and eight GDDR5 memory chips around it, according to PC Games Hardware.
- PC Games Hardware reads the memory as SK Hynix H5GC8H24MJR chips, 8 Gbit (1GB) each.
- That adds up to 32 memory chips, 8GB per GPU and 32GB in total.
- Four 8-pin power connectors.
- One HDMI output, per PC Games Hardware.
- An AMD logo near the PCIe connector.
- A PCIe x8 connection instead of the usual x16.
The 32GB figure needs one caveat. Each GPU uses only its own 8GB. PC Games Hardware stresses that none of the memory is shared, so software does not see one 32GB pool. Notebookcheck also calls the memory count unconfirmed.
No cooler appears in the photos. Its intended cooling setup is therefore unknown.
RX 470 or RX 570?
The board carries the label “DYII-XQ570 V1.0”. That name hints at the RX 570. However, ComputerBase reports that the user told VideoCardz a sticker on the board lists four RX 470 chips instead.
Accounts differ on who made that identification. ComputerBase and PC Games Hardware attribute it to GOK and VideoCardz. Notebookcheck says Wccftech first identified the four RX 470 GPUs.
The RX 470 uses AMD’s Polaris 10 chip. ComputerBase notes that GlobalFoundries built it on a 14nm process.
Not an official AMD card
The AMD logo does not make this an AMD product. ComputerBase says the board is not an official AMD design. It describes the card as a suspected Chinese-made build for mining rigs.
VideoCardz suggested the board was meant for cryptocurrency mining and server clusters, according to PC Games Hardware. Notebookcheck lists a wider set of possibilities:
- A compact cryptocurrency mining card
- A multi-GPU concept
- A test board for power delivery or PCB layout
- Research into parallel GPU computing
None of these has been confirmed. It is also unclear whether any finished cards were ever sold, or whether this stayed a prototype.
How it compares with an earlier mining card
VideoCardz pointed to a dual-GPU RX 570 built for Ethereum mining as a related design. The FPS Review covered that Sapphire card in August 2021. The table below uses only reported facts.
| Four-GPU RX 470 board | Sapphire dual RX 570 (2021 leak) | |
|---|---|---|
| GPUs | 4x Radeon RX 470 (Polaris 10) | 2x Radeon RX 570 (Polaris 20) |
| Memory | 8GB GDDR5 per GPU, 32GB total | Not stated in reports |
| Power connectors | 4x 8-pin | 2x 8-pin |
| Display outputs | 1x HDMI | 1x HDMI |
| Maker | Unknown, not an official AMD design | Sapphire logo on a choke, never officially announced |
| Reported use | Likely mining (unconfirmed) | Crypto mining, 59.69 MH/s in leaked benchmarks |
| Photo source | GOK on X | Saraba1st forum, shared by VideoCardz and MEGAsizeGPU on X |
The four-GPU board doubles the GPU count and the power connectors of the Sapphire design. Both keep a single HDMI output.
Technical details: power and PCIe link
Power delivery
A single RX 470 uses one 6-pin or one 8-pin power plug, depending on the model. This board has four 8-pin plugs. ComputerBase says those alone could supply up to 600 watts. PC Games Hardware adds that the slot would provide power on top of that, in theory. The card’s real power draw is unknown.
Notebookcheck describes the power circuitry as extensive, with many inductors and power transistors. That fits a board designed for a high total load.
A slower link to the PC
The card connects through eight PCIe lanes rather than sixteen. ComputerBase also reports that the PCIe switch on the board reportedly runs only at PCIe 2.0. A PCIe switch lets several chips share one slot. ComputerBase says it is no obstacle for the suspected mining use.
Who posted the photos
GOK regularly shares images of unreleased prototypes and development boards from AMD, Nvidia and Intel, according to Notebookcheck. In late 2025, he published AMD’s reference design for the Radeon RX 7700 XT and prototype images of Intel Battlemage GPUs. About two years ago, he also showed a suspected prototype of the Asus Mars III with two Nvidia GPUs, ComputerBase notes.
What remains unclear
Several basic questions are still open. The maker of the board is unknown. Nobody has said how it was meant to be cooled or how much power it draws. It is also not known whether the card ever left the prototype stage.
The board joins a long list of odd multi-chip designs. PC Games Hardware recalls crypto-era mining boards built around a cut-down PS5 chip. It also compares the card to the 3dfx Voodoo 5 6000 and the Quantum3D AAlchemy 8164, which used eight VSA-100 chips. Whether this RX 470 board is truly the biggest PCIe card ever made remains an open claim.
