https://forum.asrock.com/ Copyright (c) 2006-2013 Web Wiz Forums - All Rights Reserved. Mon, 22 Jun 2026 19:30:09 +0000 Tue, 12 Nov 2019 22:52:34 +0000 http://blogs.law.harvard.edu/tech/rss Web Wiz Forums 12.04 360 https://forum.asrock.com/RSS_post_feed.asp?TID=12856 https://forum.asrock.com/forum_images/web_wiz_forums_black.png https://forum.asrock.com/ https://forum.asrock.com/forum_posts.asp?TID=12856&PID=69876&title=2700x-on-b450-pro-4-cannot-disable-smt#69876 Author: h3r3t1k
Subject: 12856
Posted: 12 Nov 2019 at 10:52pm

I have the same problem as this guy: http://forum.asrock.com/forum_posts.asp?TID=11614&title=help-with-disabling-smt

In an effort to raise efficiency (only non-AAA gaming use) I wanted to disable SMT. It doesn't work. Prime95 keeps seeing 16 threads. Power cycle didn't help and disabling suspend to RAM didn't work either. I'm on BIOS 3.31 and it explicitly states in the notes that disabling SMT is supposed to work.

Also setting cTDP as seen here: https://www.reddit.com/r/Amd/comments/9mxs88/ryzen_7_2700x_ctdp_test_15w_vs_35w_vs_65w_vs_auto/ is not working either. The option doesn't exist.

The only thing I can do is set downcore to 4+0 in order to get 4c/8t which acutally works. I'd much rather disable SMT or set cTDP to 65W tho.]]> Tue, 12 Nov 2019 22:52:34 +0000 https://forum.asrock.com/forum_posts.asp?TID=12856&PID=69876&title=2700x-on-b450-pro-4-cannot-disable-smt#69876