There should be a five series BIOS out in the next couple of weeks, officially. They have added to additional settings to Transaction Booster, when enabled it will have 0~3, in essence, the 3 setting will be equal to or a little better than Memset performance level 4. Additional memory ratios will also be opened up and the chipset latencies will be improved when using the 200/266 straps. I have been testing 0603 for the P5K3 BIOS with the changes listed above and then some.

Quote Originally Posted by msgclb View Post
The P5KD 0403 bios is up on

ftp://ftp.asus.com.tw/pub/ASUS/mb/so.../P5K%20Deluxe/

I successfully flashed to 0403 from 0311. On the initial boot I had a check sum F1 message but all the boots since have been successful after I set my defaults.

The one change that I've noticed is on the JumperFree Configurations page. I believe it's the much awaited option:

FSB Strap to North Bridge [Auto], 200MHz, 266MHz, 333Mhz

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At this point I'm not sure what this change means.