PCB and Circuit Analysis
Pulling all of the previously viewed cooling and other shielding features leaves us with the bare Taichi motherboard, as you can see here. A lot is going on here, and we will cover some of the high-level components in the following images.
The VRM of the Z490 Taichi is a 12+2 design powered by an Intersil ISL69269. The CPU phases are 50A SiC654 Vishay units and are using ISL6617 smart doublers. This is not nearly as powerful of a VRM solution as we have seen on some costly boards, but with a little math, I think we can safely say that there is plenty of room in this VRM for even XOC usage as it is fitted.
To the lower left of the VRM section, we spy the ASMedia ASM3242, which is the USB 3.2 Gen 2x2 controller enabling the 20Gb capable USB Type-C port on the rear.
Here we see the two GT or iGPU phases, which are powered by SiC632A, which are also 50A power stages from Vishay, but these are used to drive the UHD 630 on the Intel CPU.
Next up, we have the ASMedia ASM1074which is the USB Superspeed or USB 3.2 Gen 1 controller for the 5Gb USB ports.
The audio solution is the ever-popular ALC1220 from Realtek, and it is backed by an ESS DAC. There are even large electrolytic Nichicon caps along with high-end WIMA film capacitors (not shown in image) in the audio solution.
Here we see the memory VRM, which is a dual-phase solution comprised of Sinopower dual N-channel MOSFETs model number SM7341EH. The PWM controller is a uP1674P to push the double memory phases.
Midboard, we have the SuperIO chip, the Nuvotron NCT6796D-E. Above the SuperIO, we have the PCIe 4 capable redrivers (P13EQX16) and P13DBS for the handling of the exchanging of lanes depending upon the slot population.
We also have the PCH at the lower right, and below that, to the right, we have the ASM1061, which is used for the two extra SATA 6Gb ports mentioned previously.
Moving to the rear of the board, we start at the top where we find the phase doublers used on the CPU power phases. We also see a row of aluminum electrolytic capacitors, which are nice, but in many cases, expensive additions when deployed in large quantities.
Next up is the rear of the socket, where we find a large number of ceramic caps, along with two smaller tantalum capacitors with a 150 microfarad rating. These are excellent additions and something we have seen slowly starting to take residence in the rear of the socket area.
Here we have the chipset labeled FlashBack 2, which is as you can probably guess used for the USB BIOS flashback function. This chipset allows for the boards UEFI to be flashed without a CPU in the system.
The last two parts on the rear of the board are the LAN chipsets. First up is the gigabit LAN, which is an intel I219V chipset.
The other chipset is labeled as a Rocket RTL8125BG, but for anyone who has been around the tech world for a while, we know that RTL part numbers are Realtek LAN. The only reason I can assume they are using the Dragon branding is to separate the Realtek name from the story, as some users abhorred Realtek in the past. We will test this solution and see if we have any issues with it in packet and file transfer testing.
Last updated: May 28, 2020 at 11:38 am CDT
- Page 1 [Introduction, Specifications, and Pricing]
- Page 2 [Motherboard Features and Marketing]
- Page 3 [Packaging and Accessories]
- Page 4 [ASRock Z490 Taichi Overview]
- Page 5 [PCB and Circuit Analysis]
- Page 6 [BIOS/UEFI and Software]
- Page 7 [Test System and Configuration]
- Page 8 [WPrime, SuperPi, Cinebench, and AIDA64]
- Page 9 [Handbrake, Blender, POV-Ray, CoronaRender, 7-Zip, and WebXPRT]
- Page 10 [Unigine and UL Benchmarks]
- Page 11 [System I/O Benchmarks]
- Page 12 [Clocks, Overclocking, Thermals, and Power Consumption]
- Page 13 [Final Thoughts]