DFI SB750 boards, more scuttlebut.. NOW WITH DFI LINKS

[nuts24]

Thanks for the reply namegt I have found them heatsinks on ebay.

[vcp-cur]

wow, what cooling are you using man?

please share..

[namegt]

CJH-IntL XWB-01

cpu jacket reping


90mm cooling on the back of the mainboard


radiator




Two of the pumps




The cooling water.
I'm in progress ... Phenom 9950@3.7G OC

[namegt]

X4 9950BE TDP 125W
My Phenom 9950 code 0836DPDW
What is the code for another user?
The chip is the mainboard and overclocked?

ACC : +4

[Chris_redfield]

namegt are you chilling that water or is that just a massive rad?

Looks incredibly impressive and thats a really nice OC you have managed.

[pershoot]

now at 3.2GHZ (1.42/1.41v), NB @ 2.2GHZ, 1066/5-5-5-15, ACC: Auto, 9/19 beta bios on DK 790FXB-M2RSH

sb750/acc completely unlocked the potential of this particular chip.

cooling is maxed out at this point (~55/56c (hwmon) loaded) and chip needs a massive voltage jump to do 3.3GHZ ~1.49/1.5. i'd need to add another mcr120-qp and get med. power fans on the rads to dump the heat of an increased clock using this vortex xp block (dtek fuzion v1). its whisper quiet tho with 2 yate loons low power on 2xmcr120-qp. pwm stays cool on this board (36/37c as per the sensor). chipset 60c loaded according to sensor. ide is flaky (garbled string readout next to controller sometimes and rare hangs at post). slight vdroop (havent tested with a dmm but hwmon says 1.42->1.41VID + 11.97 -> 11.9 +12 rail @ load (corsair hx620 psu). slight htt increase just causes massive instability.

maybe i can get slightly more by tweaking out acc, but i dont think so. it seems sensitive. either causing no boots, lock ups and other wierd behavior past -2 (+ locks up)

board needed a cmos clear when i got it. windows wouldnt install (lock ups) and when it did, it was freezing every few mins and lockups in windows). i miss ez clear from the ut. pain to jumper it.

ill test idle instablity/freezing after letting occt sit for ~6 hours.

AOD caused lockups on starting (i havent tested it after i did the cmos clear tho).

-pershoot

[pershoot]

dont flash to 9/30 official. you'll lose the ability to change NB multiplier. 9/19 beta feels a bit better then 9/30 does as well.

[Chris_redfield]

cooling is maxed out at this point (~55/56c (hwmon) loaded) and chip needs a massive voltage jump to do 3.3GHZ ~1.49/1.5.

Is 56 degrees the optimum temperature for this CPU then?

I was bungling along thinking it was OK to do around 65? Though I have not hit higher than 61 degrees so far (that was with 1.5 volts before I updated the BIOS,)

Is it also not recommended to go higher than 1.5 volts?

Sorry if these questions seem naive but I am new to AMD oc'ing and was just reckoning the CPU would be alright with slightly higher voltages.

I am cooling on air at the moment with a Coolermaster V8 though later on I will probably put together a makeshift loop using a double thermochill and single XSPC rad just to see how high I can get this 9850 BE.

[pershoot]

Is 56 degrees the optimum temperature for this CPU then?

I was bungling along thinking it was OK to do around 65? Though I have not hit higher than 61 degrees so far (that was with 1.5 volts before I updated the BIOS,)

Is it also not recommended to go higher than 1.5 volts?

Sorry if these questions seem naive but I am new to AMD oc'ing and was just reckoning the CPU would be alright with slightly higher voltages.

I am cooling on air at the moment with a Coolermaster V8 though later on I will probably put together a makeshift loop using a double thermochill and single XSPC rad just to see how high I can get this 9850 BE.

i think 1.5 'might' be too high for 24/7 without some later degradation (altho 65nm can take up to 1.55 i believe). plus your on air, so not advisable in my opinion.

i had it hit 62c, and it failed eventually. it likes 50-57 max for my particular cpu. i tightened the waterblock and am getting more stable temps so far. retesting... im also getting some evaporation in my res.. hope i dont have a leak! that would suck...

triple 120's with some medium fans on mcr's or 3 thermochills and low power would do the trick on a massively oc'd phenom.

[Chris_redfield]

OK. Cheers man. I've just reconfigured the fan settings on the cooler which has lowered temps by five degrees under load. I was tempted to aim another fan at it but I want to probe and find decent 24/7 settings first and I think aiming extra fans at the cooler would just give me unrealistic results and defeat the purpose. Later on if I think heat is standing in the way of some decent benchmarks I'll slap on the EK and push it a bit harder.

[pershoot]

this idle freeze is killin me! load stable 3.2, np, but idle/web browsing is another story. playing with acc now...

[crazydiamond]

this idle freeze is killin me! load stable 3.2, np, but idle/web browsing is another story. playing with acc now...

ive had that happen too a few times, is that 3.2 w/ multi only?

[pershoot]

ive had that happen too a few times, is that 3.2 w/ multi only?

yea. same thing that plagued me on the sb600 (except there it was 2.8+).

[pershoot]

dropped to 3.1ghz and testing idle freeze. any combo of acc or even setting acc other then auto causes a no post after shutdown and power up (requiring a cmos clear). hopefully a bios revision can fix this.

[pershoot]

had to drop to 3.0GHZ (idle freeze at 3.1ghz/3.2ghz), i may bump htt some (i cant do 206 or 205 @ 1066, but can do 203). hoping a bios update can make things smoother.. i can set a +2 or +4, but not 0 or - if i want to post after a hard shutdown. auto seems to work best.

[gR3iF]

Does someone knows something about the IMC vCore ? Will they come in a new Bios ?

[nuts24]

Done a quick over clock with just the multiplayer and hit 3.1 all cores with no problems at stock voltage and ACC on Auto using AMD overdrive.

The next thing I will do is clock the cores one by one with AMD over drive and see if I have a poor core to see why I can not hit 3.2 with out getting the BSOD. Then I will look at using ACC and run the tests again at +2 and then +4 to see if this helps.

Once I know how far I can push using multiplayer on stock voltages I will then start pushing the bus.

[pershoot]

awesome. any idle/web browse freeze? at 3.1, took up to an hour to show idle/web browse freezing for me. at 3.2 took a few mins to immediate after windows start up.

[Rammsteiner]

Sad to see idle freezing to be still there. Maybe you should try more ACC options or so. Ive had massive idle freezing on SB600. I just got my SB750 so I still need to test it.

Oh well, bee running stock for 4 months now easily, if not 5. I can wait another 2 months for Deneb anyway

[Rammsteiner]

w00t, testing the 790FXB-M2RS now.

Thus far it does 2.9Ghz already prime stable for two hours with only +0.025mV (CPU-Z reports 1.28Vcore) and only runs about 43C load.

ACC is on auto and reports for every core in BIOS '-2'. Is this just a stock value or is that chosen to be the best option for this CPU?

I tried booting 3Ghz with stock Volts but I got BSOD's before log-in. I think I need to get an idea again of OCíng Phenom Not that I care, I love it.

Ive AOD 2.1.2 I think, but I cant use ACC via AOD. I read about 2.1.4 so Ill try and use that instead.

Also I tried looking for the list of MSR editor codes to OC Phenom that way but I couldnt find it While browsing this thread I noticed 'F9'in BIOS might uncover extra options? Does this include NB control (cant see now since Im testing). If not then I'd appreciate if someone knows where to find the MSR values again

Anyway, for anyone who forgot, I never could boot at 2.9Ghz on the UT 790FX. 2.8Ghz ran 16h prime stable but suffered severely from idle freezing. In the end I just decided for a small OC but even 2.6Ghz suffered from idle freezing. So 2.9Ghz even logging into windows is a huge step here. I hope I can reach 3Ghz though (or higher), just have to figure out ACC a bit

[Chris_redfield]

I think that is just the default value that appears visible, I don't think setting the ACC to auto switches all cores to -2 because if you change some of the values to say +4 and then switch it back to auto the +4 remains visible.

I'm a bit dissapointed with my CPU, I can't acheive anything other than 2.9 with stability. No matter what I do at higher speeds the fourth or third core drops. I have managed to boot into Vista with 3.4GHz but prime 95 begins failing almost immediately and will sometimes crash the system. 3.1 I can make stable for as long as 1hr 10 minutes before the fourth core stops.

Its not the end of the world though because I always planned on replacing it as soon as Deneb arrived and putting this one into a Media Server. I was originally going to get the X3 black edition because it was a lot cheaper but in the end impulse forced me to the 9850.

[pershoot]

w00t, testing the 790FXB-M2RS now.

Thus far it does 2.9Ghz already prime stable for two hours with only +0.025mV (CPU-Z reports 1.28Vcore) and only runs about 43C load.

ACC is on auto and reports for every core in BIOS '-2'. Is this just a stock value or is that chosen to be the best option for this CPU?

I tried booting 3Ghz with stock Volts but I got BSOD's before log-in. I think I need to get an idea again of OCíng Phenom Not that I care, I love it.

Ive AOD 2.1.2 I think, but I cant use ACC via AOD. I read about 2.1.4 so Ill try and use that instead.

Also I tried looking for the list of MSR editor codes to OC Phenom that way but I couldnt find it While browsing this thread I noticed 'F9'in BIOS might uncover extra options? Does this include NB control (cant see now since Im testing). If not then I'd appreciate if someone knows where to find the MSR values again

Anyway, for anyone who forgot, I never could boot at 2.9Ghz on the UT 790FX. 2.8Ghz ran 16h prime stable but suffered severely from idle freezing. In the end I just decided for a small OC but even 2.6Ghz suffered from idle freezing. So 2.9Ghz even logging into windows is a huge step here. I hope I can reach 3Ghz though (or higher), just have to figure out ACC a bit

f9 will give you nb multiplier and divisor, cpu hex and divisor and some extra HT and DRAM options along with tlb option. setting acc to auto 'should' net you to 3.0ghz. might take ~1.33 or so. if u decide to play with acc, set your acc value, boot all the way to windows then power off and power up. if you can post, then go ahead and test stability. i can only POST after power off using values +2, +4 or auto. 9/19 beta seems good. i wouldn't use 9/30 official, as nb mlti change doesn't work in that one.

[Rammsteiner]

I think that is just the default value that appears visible, I don't think setting the ACC to auto switches all cores to -2 because if you change some of the values to say +4 and then switch it back to auto the +4 remains visible.

Makes sense. At least thus far it's working very well though

I'm a bit dissapointed with my CPU, I can't acheive anything other than 2.9 with stability. No matter what I do at higher speeds the fourth or third core drops. I have managed to boot into Vista with 3.4GHz but prime 95 begins failing almost immediately and will sometimes crash the system. 3.1 I can make stable for as long as 1hr 10 minutes before the fourth core stops.

If someone is so nice to find the MSR editor results you can easily adjust your 4th core to run slower than the other 3 cores. Possible via AOD too however I dont feel like using AOD too much, I prefer BIOS.

Its not the end of the world though because I always planned on replacing it as soon as Deneb arrived and putting this one into a Media Server. I was originally going to get the X3 black edition because it was a lot cheaper but in the end impulse forced me to the 9850.

Same, of course Im glad to see what this CPU really can do but whatever it can do, when Deneb is released it will be the next day here

f9 will give you nb multiplier and divisor, cpu hex and divisor and some extra HT and DRAM options along with tlb option. setting acc to auto 'should' net you to 3.0ghz. might take ~1.33 or so. if u decide to play with acc, set your acc value, boot all the way to windows then power off and power up. if you can post, then go ahead and test stability. i can only POST after power off using values +2, +4 or auto. 9/19 beta seems good. i wouldn't use 9/30 official, as nb mlti change doesn't work in that one.

Im still using the default BIOS (9/16). Ill check later if NB multiplier works on that. Im right now on 3Ghz using ACC auto and +0.025mV, although I dont even know if it was needed anyway. CPU-Z reports now 1.296Vcore. Full load thus far 46C, Im quite impressed thus far. Prime95 is already running 2 hours now at those settings and Ive WinAmp in the back ground. Dont know if it really helps, but I think on the SB600 while Priming and WinAmp you could still detect idle freezing.

But Im first focusing on my CPU and eventually ACC. After testing the max of my NB. Ill try and put those results around a 250Mhz HTT so I can run my lovely D9's at DDR1000 4-4-4 again

[xPliziT]

Upgrade to the latest BETA bios !
09/19

It gave me dramatically better stability while o/c and higher o/c.

http://us.dfi.com.tw/Support/Downloa...FLAG=B&SITE=US

[pershoot]

Im still using the default BIOS (9/16). Ill check later if NB multiplier works on that. Im right now on 3Ghz using ACC auto and +0.025mV, although I dont even know if it was needed anyway. CPU-Z reports now 1.296Vcore. Full load thus far 46C, Im quite impressed thus far. Prime95 is already running 2 hours now at those settings and Ive WinAmp in the back ground. Dont know if it really helps, but I think on the SB600 while Priming and WinAmp you could still detect idle freezing.

But Im first focusing on my CPU and eventually ACC. After testing the max of my NB. Ill try and put those results around a 250Mhz HTT so I can run my lovely D9's at DDR1000 4-4-4 again

my board came with 8/27. ya ACC for sure is working as promised by AMD, 300MHZ+ increases.

like you i had massive idle freezing on sb600, but from 2.8GHZ+. couldnt even get past 2.9GHZ without instant lockups. 46c is good. you have some more room (~9-10c). ramp up those MHZ's!