B450m steel legend BIOS v3.20 - PCIe lanes issue

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   Hi - apparently the latest v3.20 BIOS breaks M.2 NVME PCIe lane allocation.
Smasung Magician and HWinfo both show PCIe gen 3 x2

Tried manually forcing M.2 to gen 3 in BIOS, no effect

Downgrading to BIOS v2.90 fixes the issue. Drive returns to gen 3 x4 and improves drive performance.

B450m Steel Legend
Ryzen 5 3600
Samsung 970 EVO plus

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Tiro82 Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 11 Jul 2020 Status: Offline Points: 5	Post Options Post Reply Quote Tiro82 Report Post Thanks(0) Quote Reply Topic: B450m steel legend BIOS v3.20 - PCIe lanes issue Posted: 11 Jul 2020 at 6:43am
	Hi - apparently the latest v3.20 BIOS breaks M.2 NVME PCIe lane allocation. Smasung Magician and HWinfo both show PCIe gen 3 x2 Tried manually forcing M.2 to gen 3 in BIOS, no effect Downgrading to BIOS v2.90 fixes the issue. Drive returns to gen 3 x4 and improves drive performance. B450m Steel Legend Ryzen 5 3600 Samsung 970 EVO plus

sebastianer Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 27 Jul 2019 Status: Offline Points: 37	Post Options Post Reply Quote sebastianer Report Post Thanks(0) Quote Reply Posted: 25 Jul 2020 at 10:53pm
	I'm having the same issue in my B450 ITX (+3700X) Sequential benchmarks write speed went down from 1600-1800MB/s to 700-900MB/s. Sometimes 20MB/s and PC gets stuck when running the sequential benchmark This started happening after upgrading to AGESA 1.0.0.6 BIOS
	MB: ASRock B450 ITX (P3.70) CPU: Ryzen 7 3700X RAM: Ballistix BLS2K8G4D32AESTK SSD: Crucial P1 500 NVME GPU: Gigabyte G1 GTX1080 PSU: Enermax ERX530AWT --> Corsair RM650x (CP-9020178)

Tiro82 Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 11 Jul 2020 Status: Offline Points: 5	Post Options Post Reply Quote Tiro82 Report Post Thanks(1) Quote Reply Posted: 25 Jul 2020 at 11:07pm
	opened a support ticket and got an updated bios that fixed the issue

sebastianer Members Profile Send Private Message Find Members Posts Add to Buddy List Newbie Joined: 27 Jul 2019 Status: Offline Points: 37	Post Options Post Reply Quote sebastianer Report Post Thanks(0) Quote Reply Posted: 27 Jul 2020 at 10:23pm
	Really? I'll do the same. Thanks!
	MB: ASRock B450 ITX (P3.70) CPU: Ryzen 7 3700X RAM: Ballistix BLS2K8G4D32AESTK SSD: Crucial P1 500 NVME GPU: Gigabyte G1 GTX1080 PSU: Enermax ERX530AWT --> Corsair RM650x (CP-9020178)