Dual GPU AMD Radeon RX Vega Graphics Card Spotted In Linux Drivers

A liquid cooled dual GPU Radeon RX Vega graphics card has been spotted in a brand new Linux driver released by AMD yesterday. Linux drivers have consistently proven to be an invaluable source of information regarding the company’s upcoming next generation Vega graphics products. The just released update to the open-source Linux graphics driver stack contains some very revealing code pertaining to the company’s latest and greatest graphics chips.

Dual GPU AMD Radeon RX Vega Graphics Card Spotted In Linux Drivers

First things first, let’s take a look at the code.

table->Tliquid1Limit = cpu_to_le16(tdp_table->usTemperatureLimitLiquid1);

table->Tliquid2Limit = cpu_to_le16(tdp_table->usTemperatureLimitLiquid2);

The two lines of code above have been added to AMD’s Linux open-source driver stack yesterday, alongside two brand new Vega device IDs. The new Vega 10 IDs are 0x6864 and 0x6868 and seeing as how they’ve been added this close to launch the new IDs very likely pertain to actual finalized or near finalized Vega graphics boards.

Now, back to the dual GPU Vega board. Digging deeper into the Vega 10 power management and temperature sensor code reveals another gem.

table->FanGainPlx = hwmgr->thermal_controller. advanceFanControlParameters.usFanGainPlx;

table->TplxLimit = cpu_to_le16(tdp_table->usTemperatureLimitPlx);

What you’re looking at is code specific to a PLX chip, found in the Vega 10 code stack. A PLX chip is an ASIC that splices PCIe lanes to bridge multiple components. They’re used in dual GPU graphics boards to connect the two graphics processors together and then drive that signal to the PCIe slot.

In other words, get ready for a brand new Radeon Pro Duo flagship graphics board from RTG. This time powered by the all new Vega 10 GPU. AMD is set to take the covers off Vega at an event on May 16th, less than a week from now.

AMD Vega 10 & Vega 11 GPUs

Graphics Card Radeon R9 Fury X Radeon RX 480 Radeon RX 580 Radeon RX Vega Series Radeon RX Vega Series Radeon RX Vega Pro Duo
GPU Fiji XT Polaris 10 Polaris 20 Vega 11 Vega 10 2x Vega 10
Process Node 28nm 14nm FinFET 14nm FinFET FinFET FinFET FinFET
Stream Processors 4096 2304 2304 TBA 4096 8192
Performance 8.6 TFLOPS
8.6 (FP16) TFLOPS
5.8 (FP16) TFLOPS
6.1 TFLOPs
6.1 (FP16) TFLOPs
25 (FP16) TFLOPS
Memory Bus 4096-bit 256-bit 256-bit TBA 2048-bit 4096-bit
Bandwidth 512GB/s 256GB/S 256GB/S TBA TBA TBA
TDP 275W 150W 150W TBA <250W TBA
Launch 2015 2016 Q2 2017 2017 Q2 2017 TBA

Vega Architecture Key Features

– 2x Peak FP16 Throughput/Performance Per Clock
– 2x FP32 Performance/Watt, 4x FP16 Performance/Watt
– High Bandwidth Cache
– 2x Bandwidth per pin
– 8x Capacity Per stack (2nd Generation High Bandwidth Memory)
– 512TB Virtual Address Space
– Next Generation Compute Engine
– Next Generation Pixel Engine
– Next Generation Compute Unit optimized for higher clock speeds
– Rapid Packed Math
– Draw Stream Binning Rasterizer
– Primitive Shaders