**Official DFI LanParty UT 790FX-M2R Review/Overclock/Guide Thread**

[Brother Esau]

Update:..............Houston we have lift off Well its confirmed not Bios issue but indeed SPD issue for sure! Have been able to get same results on 1/30/2008 Official Bios this time all stock voltage less Ram which is set to 1.96vdimm and 5-5-5-18 @75ns across the board The only issue I see with this is that I will be needing that SPD from you Tony as for some strange reason some times after setting Primaries in bios for Ram when I go back into DRAM Config page timings that were sett to 5-6-6-18 mysteriosly become 5-8-8-30 same as with the 3/31/08 Beta Bios which is what made me think it was Flaky Perhaps maybe SPD for Reaper 9200 ....OCZ2RPR11502GK are more tuned to Intel boards?
What are you're thoughts on this Tony? But anyway good thing we have Tony helping with this SPD issue I really can't say any other Ram Manufacturer that this would be possible with other then OCZ and their great staff

Will be anxiously awaiting that SPD File for 790FX /Phenom/OCZ

[Tony]

you just need our new shipping spd, but its not tuned so much for Phenom MCH's.

Also im having issues hitting clocks with micron where it was easy with our new 1066 IC's.

The spd im workin on boots at 1066 from a cmos clear, you then have to set manual for the ram speed and 1066 followed by another reboot to bios to unlock the 1066 MCH settings for the ram...but it boots from the getgo which is what we needed.

lots of testing on this one.

[Tony]

UPDATE

tRFC detection by bios off the SPD is not working, so you will have to set this manually till DFI sort out a new bios build. I have programmed bang on 127.5 and 195 with both not being detected right.

Everything looks AOK outside tRFC so its no biggy

[Brother Esau]

One thing to mention is that both instances of when Primary timings would reconfigure them selves is only when I set 5-6-6-18 save / exit upon next time re entering Bios DRam Config Page it would be 5-8-8-30 on 1/30/08 as well as 3/31/08 Beta But once I changed it to 5-5-5-18 it does not fo a weird flip to other timings just weird man!

[Tony]

thats because you were entering timings pre 1066 mode, rebooting with 1066 mode enabled which alters how the board sets up its timings.

it is actually how the board is supposed to work

So...no fault with bios, just end user needed an update LOL

[Brother Esau]

thats because you were entering timings pre 1066 mode, rebooting with 1066 mode enabled which alters how the board sets up its timings.

it is actually how the board is supposed to work

So...no fault with bios, just end user needed an update LOL

Tony are their ant 2X2GB OCZ 1066 Kits that work well with this damn thing that run on low voltage?

[Tony]

workin on the 2GB dimm spd now, the issue is all the PSC does 1000 at 1.8V and needs 2V ish for 1066 on average.

If only AMD could tune the 1066 hook down to 1000 we would have killer systems with phenom

[Brother Esau]

True Hey do you have any inside info as to source code update advancement from AMD/Award? I mean these Bios are getting to be beyond a frigging joke already and I know DFI is scrambling trying to make a Mercedes out of a Volkswagon Rabbit and they can only work with whats presented to them at any given time but sh**t this situation is really starting to chap my ass!

Doubt you will be Game on this one but .....Hows about some Modded Bios Love from Big Toe?

[Rammsteiner]

Tony, I saw you changed CPU ODT to 150Ohm. Although that's with a Phenom, when should this setting be changed? Ive 4x 1GB DDR1066 (running DDR1000 though). And how does the setting effects stability/OC'ing/performance?

Any words from you about Drive Strength settings? I noticed they've a very big impact on stability and OC'ing. But then I think I finally got the right settings and only 1Mhz higher it crashes all around, extra Voltage doesnt matter. Doesnt sound right to me.

In my case I noticed the following when trying to get ~DDR1170 with 4x1GB D9GMH:
DRAM Driver Weak Mode: Weak gave me best OC'ing
CPU ODT: Ive no clue how/what it does so left it at 300Ohm
DQS: 0.75x worked, so left it there. Increase didnt help AFAIk
Data: Not lower than 1.00x, higher didnt really matter either
MEMCLK: Big impact, upped all the way to 1.50x and it increased a lot
Addr/CMD: AFAIK lowering this one helped with stability, decreased to 1.00x
CS: No idea, worked at 1.00x/1.25x.
CKE: No idea at all, 1.00x/1.25x worked.

[MKroenke]

Does anyone know whether the Enermax MODU82+ PSUs work with the Board?

[Tony]

I tested 150 Ohms thinking it would incease the level of drive, it did seem to make a difference to my dimms here.

You have to remember there is no hard and fast rule, some dimms like strong drive some weak...you have to test to see

[Tony]

True Hey do you have any inside info as to source code update advancement from AMD/Award? I mean these Bios are getting to be beyond a frigging joke already and I know DFI is scrambling trying to make a Mercedes out of a Volkswagon Rabbit and they can only work with whats presented to them at any given time but sh**t this situation is really starting to chap my ass!

Doubt you will be Game on this one but .....Hows about some Modded Bios Love from Big Toe?

half the issues are because we are so used to K8 and how it clocked, we move to K10 and a whole set of new rules comes to play.
just look at your quote about the board messing up timings, you were not aware that the boards have a separate set of instruction that have to open up after you have chosen 1066 mode, so you were thinking the bios was borked when it in fact was working 100%.

There is stock of 9850BE's close to me so i will go get one today, I advised OCZ its time to step up support for AMD now as it appears they have made headway with B3. While some B2's are fine, going by my experience with a 9600 we all must be aware that some B2's are harder work to tune to squeeze the best out of them...of course they are fine at stock but thats NOT what an OCer is looking for

I will do some guides over at the OCZ forum for our customers, its going to be a big learning curve for many as they don't realize K10 is a whole lot different.

Regarding modded bios, i think its best i just work on getting the bios files working as they should, things like detecting tRFC correctly has to happen or default speed high performance dimms just will not work correctly.

[KTE]

Yeah I think some of you guys need to listen to what Tony is saying; 1066 is not difficult but it's not just one thing.

DFI 1066 no-boot is a problem involving more than one factor.

MSI/GBT/ASUS boards for a while now boot 1066 with EPP 1066 just fine.
They had to update BIOS source code to do it, or no matter what you did, there was no boot.
DFI guys would need something similar.

Look here, I flashed SPD 1066 successfully back around December with EPP 1066 D9 RAM=>
=>

It still did not boot 1066! Because BIOS was at fault. Updated BIOS and voila! Straight boot.

There is the better way to get near 1066 IMO =>



It'll alow even 3-3-3-8

KTE..., my friend..., I never doubted about your knowledge, far superior and wider than mine, if you said so, I believe in you and learning from you. But I have the feeling that you are missing the ability of the HS to absorb/dissipate the heat, and cooling the IHS on your equation.

Well I'm only a normal guy and see myself just like you, sharing info.

What I'm saying is based from info from within AMD though (for a while) and we've confirmed that the temp readouts you have on current AMD CPUs are very wrong (very low compared to real). It is supposed to be fixed in BIOS/AOD and/or the latest B3 step.

Was trying to make a joke, since I haven't realize if I found the "G-Spot" on DFI for be so "cold". Sorry for my "Beach" English, only 2 years English on High School, ages ago.

Your english is quote fine bro

Now, seriously I just order an 9850BE for 199 euros, expect to arrive by the end of next week. It's available in Germany since yesterday.

Keep us updated on what it does. Aim for at least 3G stable, I'm sure some will reach it

The beta bios should fix temperature readings in the first place, have not tried the previous beta to see how much ref HT it gives. 275MHz ref HT primed here for ~ 2hrs (550MHz 4-4-4-12-26 at 2.26V (min)) then the system froze but i was at 2.61GHz with only 1.375V. So I'll try it in small steps with a 10x cpu multi starting at 260MHz.

That BIOS showing core temps below CPU diode temp is wrong and that BIOS showing very high above CPU temp also looks a little wrong

Question: I downloaded Taiphoon and looked on my crucial dimm's. With that tool i see three different profiles for 200, 333 and 400MHz. CPU-Z shows two JEDEC profiles (333,400) and two EPP (400,533).
Is there a tool for modifying that 533-EPP profile in a way that it will support better that 4-5-5-16 timings at 533?

Nope, SPD has nothing to do with what Phenom IMC allows. Lowest option codable within Phenom IMC is lowest BIOS can set. The timings are all encoded to the DRAM Speed Mode and the lowest for 1066 mode are: 4-5-5-15
Each of them equal 00 encodings within K10h IMC. That's a Phenom limitation, nothing can change that I'm afraid.

[Oese]

Yeah thats why we bneed trc > 26 @ divisor 800mhz too.. or is this a similar limitation?

[Tony]

Sami tells me all the bios files have code for correct detection of 1066 from Jedec table now, I have the SPD to do it with the DFI and it works every time
tRFC is an issue, i already mailed DFI and AMD for them to sort it. We are testing the SPD inhouse over the next few days with a view to release it there after with product.

I also have 9850BE (bought one) and will resume testing with what looks to be a much better CPU than the real early B2 I have.

[KTE]

Thanks for the update Tony

Oese, 800/1066 mode tRC 26 isn't a Phenom limitation, we've had 11 on MSI board for a long time.

[Oese]

thats not the problem, trc 11 runs fine even with ddr1066, but i'd like to try above 26 to reach 1100mhz, which should be possible with powerchip ic's but they will need higher trc then 26, in epp-profile it says 41 @ ddr1000

[Brother Esau]

ATTN:.......Does anyone have a Updated Bios Template for 1/30/2008 and above so I do not have to sit and modify what I have to accommodate the New Bios Lay out? Not trying to be lazy but I have allot of stuff going on right now with my cat amongst other things that are also pressing ATM.

I would like to provide Reference of my settings in Bios for my Phenom since Flashing the SPD File on these sticks

[BulldogPO]

How in the hell I´m supposed to tune multiplier with thhis board and latest bios cos settings look like this:
http://www.aijaa.com/v.php?i=1863388.jpg

CPU is 9600BE.
If I touch any of those settings it reverts back in boot.

[justapost]

That BIOS showing core temps below CPU diode temp is wrong and that BIOS showing very high above CPU temp also looks a little wrong

Yeah, what everest shows as CPU temp is actualy that extra sensor the dfi board has. In previous versions that sensor was labeld AUX. It's the sensor whom showed 100°C if you remember. Now if that temp is read too low it is an issue since that sensor reading is used to power off the machine if temps go above (75°/85°) C, to be save i'll set it to75° now. Thanks for the hint.

Nope, SPD has nothing to do with what Phenom IMC allows. Lowest option codable within Phenom IMC is lowest BIOS can set. The timings are all encoded to the DRAM Speed Mode and the lowest for 1066 mode are: 4-5-5-15
Each of them equal 00 encodings within K10h IMC. That's a Phenom limitation, nothing can change that I'm afraid.

Aha, now you made me read BKDG again.

[Brother Esau]

Update:

Ok since Flashing SPD File on my 2gb FLEX PC29200 and Flashing back to 1/30/2008 Official heres what I have for settings and they have Primed for 2 1/2hrs on Blend Custom not much time I know but Its a good indication that low voltage on Ram and 1.23vcore are fine and Base set up point should not need extreme voltage to run 1066 Divider

[Brother Esau]

Some more shots

[Tony]

Unganged is faster m8, 2x64 is faster than 1x128

[Brother Esau]

Hey, Tony What do I know about this thing with Phenom? Not much as of yet but that will change

But it also does these settings in Unganged Mode too

[KTE]

Achim are you getting a B3 anytime?
Good thing about AMD is, their platform is extremely tweakable because their full arch BIOS gude is freely available to all. With Intel, they only give it under NDA and so no one but a few knows facts but many assume false conjectures

Camp, Ganged is also easier to run on the MCT (easier to clock RAM/HT too).