Radeon Linux Driver Shows Possible LCS based Dual GPU VEGA

It is not the first time that a set of Linux drivers reveal a thing or two about unannounced products. In the latest leak they now indicate the existence of a liquid cooled Vega, which we already knew but also a dual-GPU version.

There’s a number of things that come to mind though, AMD might be pursuing a new Radeon Pro based dual-GPU product, but the existence of these entries in the drivers are interesting.

So what happened? Well the 10th Linux patch update includes two new device ID's that can be tied to the Vega product codenames: 0x6864 and 0x6868. That’s nothing less than nine Hardware_ID that have been spotted over the past months. In the code two lines are rather interesting:

• table->Tliquid1Limit = cpu_to_le16(tdp_table->usTemperatureLimitLiquid1);
• table->Tliquid2Limit = cpu_to_le16(tdp_table->usTemperatureLimitLiquid2);

Then there is this bit:

• table->FanGainPlx = hwmgr->thermal_controller. advanceFanControlParameters.usFanGainPlx;
• table->TplxLimit = cpu_to_le16(tdp_table->usTemperatureLimitPlx);

As you can see, that mentions PLX twice, a PLX chip is an interconnect inbetween the two GPUS, much like PCIe Express lanes. All signals are green, (or red hah!) that AMD will be unveiling Radeon RX Vega to the masses soon enough, May 16th there likely will be a set of announcements. The dual-GPU version might in fact become the flagship Radeon video card as indications thus far have shown Vega to perform at the 1070 ~1080 performance bracket from the competition.