Super User is a question and answer site for computer enthusiasts and power users. Join them; it only takes a minute:

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

I am looking at building a new PC and thought the AMD Phenom-II X4's were a great value for my needs.

I know that the older Phenom chips with "50" at the end of the model number were the fixed versions, but the numbers are a bit different on the Phenom-II's, and I couldn't find any information that cleared up rather or not the Phenom-II's had this problem.


share|improve this question
up vote 4 down vote accepted

Yes, they are free of this issue. TLB/errata 298 affected chips made in late 2007. The Phenom II X4 was released in February, 2009. The only chips which were affected were Phenom processors up to and including the "B2" and "BA" steppings. The chips released from March 27, 2008 and later are clear of the bug, as are all Phenom II processors. There's a bit more information in the Wikipedia article.

share|improve this answer
Thank you for an excellent answer! – anonymous coward Jul 30 '09 at 15:39
No problem. Good luck with your new system! I just picked up a new Core i7-920, but it does indeed look like Phenom II X4's are worth consideration. You may want to check out the following which compares Phenom II to Core i7-920:,2360.html – ChrisInEdmonton Jul 30 '09 at 15:49

Phenom II still has the MSR values of the TLB fix in the CPU registers. Use the same Phenom TLB Disable tool (google it) with Crystal CPUID 32-bit. I can confirm that removing the fix DOES increase performance and lower CPU usage on my Phenom II X4 955BE

Sorry for the 2 year topic bump but I felt this was worth it.

share|improve this answer

You must log in to answer this question.

Not the answer you're looking for? Browse other questions tagged .