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http://www.anandtech.com/weblog/showpost.aspx?i=476
Gigabyte MA790GP-DS4H BIOS F1B
ASUS M3A78-T BIOS 0304
Foxconn A7DA-S BIOS P04
MSI K9A2GX Digital BIOS 173
I flashed the gigabyte one and it worked fine. Do it at your own risk, blah blah blah. I downloaded them all in case they get pulled, let me know if I need to host them.
Thanks, Downloaded the Foxconn one. Still waiting for UPS to deliver it though.
I downloaded and flashed with the ASUS M3A78-T 0304 BIOS last night. No problems during flash, but it does exhibit some odd behavior. Any time I choose to save settings and exit CMOS, the system shuts off and then comes back on instead of doing a standard reset. When this happens it takes a very long time for video to come back on. It does seem to work though, and ACC actually does appear to do something now. I haven't fully explored the improvement yet.
What you described happens to M3A as well.So nothing to worry about :).Quote:
Originally Posted by Particle
Oh, ok. It isn't something the board used to do on the current stable BIOS--0204. But if the other boards in this family do the same thing, I won't worry about it.
The new Asus bios (0304) does the same thing on my machine, in fact it shuts down the CPU fan while the board is still lit. (kinda scary)
I played with it for a few hours last night and saw no real improvement in performance. The NB multi seems to work reliably now, the only effect I saw that would lead me to think ACC was doing something was the fact that if I set it below -6 the board wouldn't post.
Oh well, still waiting for a reply from Asus Tech. Hopefully they'll have somethng a little better to offer.
Another spin will be coming out shortly. I have not had the fan shutdown problem but will forward that to them.Quote:
Originally Posted by Daveburt714
Just to be clear Bingo, the sequence is:
Save Bios, machine shuts down, board relights with no CPU fan for ~6 seconds. Once the board is up and running the fan works properly.
I seriously doubt it's long enough to cause any damage, but it was enough make me think there was a problem the first time I saw it..
On the M3A I just got back from RMA: you can reset the BIOS, the board lights up, no fans spin and then it never posts. Seems it is stuck at that last step.
When I jacked ACC to like 8 or 10 my chip wouldn't fail prime as quickly at 2900MHz, 1.425V. This makes me thing it is in fact working, even if my chip is a lemon. :) Setting it to 6 was insufficient. Another potential problem for me is heat, as I was hitting 66C after a minute or two at load like that.
Does heat increase the more 'ACC' you give it?
when I had my Phenom 9850 on the Plat board with air, it would reach those temps using same voltage while prime95 was running after a few minutes...don't know if that helps you or not..Quote:
Originally Posted by Particle
anybody try the gigabyte bios yet?... or am I the only owner?
It flashed fine for me, but I haven't had time to make a serious overclock attempt so saw no changes really.Quote:
Originally Posted by charged3800z24
I'm gonna buy one I thinkQuote:
Originally Posted by charged3800z24
Didn't help me much for the Asus. 250htt gives me screen corruptions using the onboard video, not sure if it would with a card but I haven't put that in yet.
Just curious, are you going +8 on the ACC (all cores) Particle?Quote:
Originally Posted by Particle
Seems like I read somewhere that for older chips (mine is a 9850 0810), that you should use negative numbers for better performance....
http://www.tomshardware.com/reviews/...x,1988-13.htmlQuote:
Originally Posted by Daveburt714
"However, all indications point to the loosening and tightening of tolerances. With a Phenom X4 9950 or 9850, AMD recommends opening ACC up to +2% or so. A slower chip, like an older 9600, might be able to withstand +4% or +6%. You get the idea."
http://www.anandtech.com/cpuchipsets...spx?i=3369&p=3
"The BIOS exposes the parameter being changed, which AMD refers to as the Advanced Clock Calibration (ACC) value. Typically this value has a range of -2 to 0, on motherboards with the SB750 that support ACC the value can be set from -12 to +12. Higher numbers should allow for higher clock speeds, while lower values should allow for lower voltages/lower power operation."
Oliverda:Thanks for the links! ;)
I could have sworn it was the other way around...
The Asus M3A78-T bios still need alot of work either way. I've been trying to tweak the new 0304 bios for the last 3 hours... The board itself is really nice, but the OC features need alot of work. :(
Their Tech support has been kind of lacking too, I'm way past their supposed "48 Hour" response time.
I can't even find the board on the asus site have you got a link?Quote:
Originally Posted by Daveburt714
http://www.newegg.com/Product/Produc...82E16813131331
The product is new enough that ASUS doesn't list it on their English sites. You can find it on some of the others though.
WTF does eSATA have to do with unleashing Phenom 9950 power:ROTF:Quote:
Originally Posted by Newegg
ASUS is still tuning it, the major fixes in 0304 were 1066 memory operation, NB multis working, PCIe over 105 working, CAS4 at 800 stable with 1T, S1/S3 resume, HTT over 220 with HD3300 enabled, and ACC actually working. Now that those are more or less out of the way, performance tuning is up next although I am hearing that HTT over 245 with HD3300 is going to be difficult. The Gigabyte board with F1B is a couple of steps ahead in those areas. The Foxconn is ahead of all of them when it comes to clocking, but the last BIOS is a little twitchy with memory.Quote:
Originally Posted by Daveburt714
In regards to ACC values, all CPUs are different. I am finding that +2 on all cores is a good base to start from for the 9850/9950, anything higher generally results in some issues until you figure out which core needs more and which one needs less. On the Foxconn 790FX/SB750 board, auto resulted in the best clocking experience, found out through a lot of tuning that the cores were set at 4,4,0,2.
Mine worked fine with htt set to 245 with the onboard video. 250 gave me screen corruption but it worked. What I want is everything from 260-300 to work well, but that isn't going to happen soon. Not with onboard that is, I put my stuff in.
Bingo (or anyone), when you set ACC to auto are you also setting your OC in the BIOS or are you using AOD? Basically, does auto always select the same numbers or does it change based on clock settings, etc, which wouldn't be possible from AOD since ACC requires a reboot?