ABit AX78 Overclocking/Stability

[justapost]

Great. Is there a pin on the I/O chip of those chips reading the HT Ref?
I also have the GBT 780G again BTW.

Currently I play with the clockchip of the 690G.

http://www.idt.com/products/getDoc.cfm?docID=18459722
The specs say "An SMbus interface allows full control of the device"

This is a dump of the smbus registers "i2cdump 0 0x64 s"

   0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f    0123456789abcdef
00: 07 ff f0 ff 00 00 62 01 14 e0 e0 54 7d f8 17 de    ?.?...b????T}???
10: 76 f8 17 04                                        v???

The specs say what those mean. Gotta figure out how to read those registers from within a kernel module. That module will provide devices in /proc or /dev whom can be used to read(write) the values.
I'm still very busy at work till june. Have two weeks holiday then and will work on that module then. Meanwhile i'll do some theory (reading other sensor chip module code and stuff at smbus.org).

Agreed, it could be. That's a good point, I'll have to think that over - how to eliminate. Maybe testing by disabling one core at a time would be ok?

I'm not sure but, if you disable a core in Windows but reboot setting say 3000 across all cores in BIOS -- does the 4th core get set to 3000 aswell or do they keep it at stock on boot?

I guess windows does not use the downcore method for unused codes so it will run at 3GHz but do nothing (beside freezing maybe).
On the M3A I disabled cores 3 and 4 via bios and had no freezing issues at 3GHz so I assume disabling via bios is save.
A good test case should be:
1. Disable all cores beside core0 and find the higest voltage and frequency the core can handle. Use the higest voltage as the top limit in 2.
2. Add cores1-3 individual and find the highest voltage and frequency for that core.
3. Use the minimum of the max voltages of all four cores and find the max frequency for each core at this voltage.
4. Enjoy your overclocked system

I got into Ubuntu, ran it and got all I/O details fine. Was posting them to you but the system froze (3000/3000/3000/3000 1.355v). So have to go back into now and will post.

I hope it was due to your multis this time.