Brand new x370 Taichi-based system will not POST

Hello all, thank you for reading.

I will cut to the chase: I put together my new machine and it refuses to POST.

Hardware:
EVGA SuperNOVA 650 G3 220-G3-0650-Y1 650W 80 PLUS Gold ATX12V & EPS12V Power Supply
ASRock x370 Taichi
AMD Ryzen 1700X
EVGA CLC 280 Liquid / Water CPU Cooler, 400-HY-CL28-V1, 280mm Radiator
G.SKILL Ripjaws V Series 16GB (2 x 8GB) 288-Pin DDR4 3200 (PC4 25600) Model F4-3200C16D-16GVGB
ZOTAC 1070 AMP! Extreme
2 SSDs + 3 HDDs

Boot attempts result in power on, Dr. Debug shows code 4b, machines stays on for 20-30 seconds, then powers down. All connections tested and secure, CPU has been reseated trying to clear 4b error, no luck.

I have tried all manner of RAM permutations, with single stick in every slot (tried each stick in A1,A2,B1,B2 solo) and all manners of recommended dual-stick setups (A2+B2,A1+B1,etc.). I have also tried booting with NO RAM INSTALLED. All permutations result in code 4b displaying and the 30 second shutdown happening. The video card never sends any signal to my monitor either.

Dr. Debug FAQ only gives this generic message about 4b: "Problem related to memory. Please re-install the CPU and memory then clear CMOS. If the problem still exists, please install only one memory module or try using other memory modules." This leads me to believe that it's related to either my DIMMs or the motherboard itself, however I have no other DDR4 sticks to test with and no other AM4 motherboards to swap in.

The firmware currently installed is whatever the board shipped with. I am not going to be home for the next 8 hours so I can't retrieve it unfortunately, but I will be able to tonight if it is relevant. I can say that it is the stock version (not 100% sure which it shipped with,) but it's not the latest version, which may contribute to issues.

Thank you very much for reading and for any thoughts or help you can provide.

spamps wrote: After reading the many helpful topics about memory on here I believe the cause is incompatible memory.

Meh, do us a favor please.

Unplug the case to USB headers, and anything you have USB connected unplug and or remove it and reply back the results.

I'm not 100% sure this b4(?) you're seeing is related to memory. And I thought I've seen all the incompatible mem error codes, yet not your b4 code.

The BIOS revision the board shipped with when new(not second hand, used, or open box) is printed on a sticker on top of the BIOS chip itself.

Look 45deg up and right of the CMOS battery. or below and just to the right of the end of PCIE2.

What is printed on it?

The 1700X is supported by all BIOS revisions yet I, and you I imagine, would like to know what it is.

spamps, can you access the BIOS?  If so, you can find the BIOS version and take at look at the temperatures, especially the CPU.  I am curious what the power down is about.  Your memory is not on the qualified list.  F4-3200C14D-16GFX is on the list however.  Good luck and enjoy, John.

If I recall correctly from another thread, the G.SKILL Ripjaws V won't work at all with Ryzen. Or at best it worked at its lowest speed only.

Please follow wardog's instructions above, be sure the DIMMs are fully seated in the A2 and B2 slots. If you continue to get the 4b POST code, you'll need to try a different model of memory.