摘要：
近日，一款体积异常庞大的AMD PCIe显卡原型在网络上曝光，引发硬件爱好者关注。从电路板上清晰可见的AMD标识来看，这是一款来自AMD的产品设计，其诞生时间很可能处于Polaris架构时期。不过，与当年面向消费者市场的显卡不同，这款产品采用了极为少见的四GPU方案，在AMD公开发布的产品线中从未正式出现过。
曝光照片显示，这块红色PCB显卡集成了四颗Radeon RX 470图形核心。每颗GPU周围均配备独立的GDDR5显存芯片，整体构成了一套规模庞大的多核心图形系统。为了满足四颗GPU同时运行的需求，PCB采用了特殊布局，并配备更复杂的供电电路。据悉，该显卡总计搭载32GB GDDR5显存，同时还配备四个8针辅助供电接口，规格远超普通消费级显卡。
According to data, Radeon RX 470 was released in 2016 and is based on the 14-nanometer Polaris 10 architecture. It has 2048 stream processors, 32 computing units and 4GB GDDR5 memory, and is connected through a 256-bit memory bus. Typical power consumption of a single RX 470 is approximately 120 watts. If four GPUs are integrated on the same circuit board, it can theoretically provide a total of 8192 stream processors, making it a very rare large-scale parallel computing platform at the time.
However, there is currently no evidence that AMD had planned to launch this product as a consumer gaming graphics card. Observing its interface configuration can also reveal some special features. This graphics card only provides one HDMI output interface, and the PCIe connection specifications seem to be x8 mode only. This design is obviously not like a traditional gaming graphics card, but closer to an engineering verification platform or a dedicated computing device.
因此，业内推测这款显卡可能属于AMD内部工程实验产品，用于测试多GPU架构；另一种猜测则认为其可能与加密货币挖矿相关。由于当年挖矿市场曾对大规模并行计算能力有着强烈需求，因此这种集成四颗RX 470核心的方案具备一定合理性。
In fact, AMD has launched a number of GPU graphics card products in the past, such as Radeon Pro Duo, which integrates two Fiji GPUs. But even if compared in the history of AMD's multi-GPU products, this ultra-large graphics card integrating four Polaris GPUs is still very rare. It can be called one of the largest and most special-structured PCIe multi-GPU graphics cards exposed in recent years.
虽然这款神秘原型卡最终未能走向市场，但其曝光仍为外界提供了一个观察AMD当年多GPU研发思路的窗口，也让人们得以一窥那些从未正式发布的硬件实验项目。
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