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

[KTE]

This is starting to make zero sense. I passed 1.275V. At that point I decided to go fro 14 multi. But whatever I tried, even adding Volts, it was everything but stable. Played with HT multi, NB multi, nothing.

Ahhh you have just bit the lions tail Sir (Miss? )

You see, Dear Mr Rammsteiner (Mrs? ), everything which doesn't make sense makes sense to Phenom, quite incredible don't you think

I just noticed though I ran this time with unganged where as, IIRC, I previously ran with ganged. Maybe Im an uber n00b and never caught that, but does ganged vs unganged has any effect on stability?

Yes

[Slagathor]

Is ganged and unganged like single and duel channel?????

[Oese]

i'm sorry i have to bother you with SOME EXTREMELY PLEASING RESULT

[justapost]

Cool thanks. It looks like these regs are tight where you are only a few mils over. Interesting enough with the 4Pin droop at load it was slightly higher than the 8Pin at load.

The accuracy of the DMM in the range 0.4-4.0V is 1% + 2 Digits (0.002V) so the higher cpu-droop is more likely an error of measurement.

[Oese]

ahh, justapost, i have measured vdimm.. at 2,4v bios i got 2,4v dmm at that abandoned capacitor place in between the slots...

[Brother Esau]

i'm sorry i have to bother you with SOME EXTREMELY PLEASING RESULT

Nice Oli, Nice

[Oese]

yeah finally i made it.. it also does at lower volts as in your screeny, but unpacking and installing ati drivers seemingly was not stable.. so this is truly no suicide run

i think it was the odt pin fine delay option (disabled now) and/or xp vs. vista 64bit..

now trying to go some 3d benching, but aquamark crashed last time.. i'll see..

[justapost]

go get PCmark Vantage, run the full test 90mins or so...passes that its stable

Thank you for the tip tony but in do not use Vista here.

Great testing there, thanks.

That's the sort of testing which is very interesting and helpfully conclusive.

Thanks Tye,
My main goal is to find out if the nb voltage is really total independant from cpu speed and voltage.
Currently it looks like I require higher voltages with 70°C cpu temps than with 60°C. Also the nb starts to fuel the chip at 2.4GHz/1.4V, i get ~3°-4°C higher temps.

My 740G just booted 9850, randomly -> gotta ask MGR if he'll let a girfriend deliver the system to work now so I can test it at break

Nice, good to see the chip still works. With no chef looking over my shoulder, it's hard to cope with myself here, so may things waiting for reinvestigation.

Well wtf,

This is starting to make zero sense. I passed 1.275V. At that point I decided to go fro 14 multi. But whatever I tried, even adding Volts, it was everything but stable. Played with HT multi, NB multi, nothing.

So I tried previous settings which ran 9h+ and it randomly restarts or BSOD's... The restart makes no sense at all since Ive the auto reset OFF for when a BSOD occures. Also have the shutdown thing in BIOS off at xxC.

I just noticed though I ran this time with unganged where as, IIRC, I previously ran with ganged. Maybe Im an uber n00b and never caught that, but does ganged vs unganged has any effect on stability? At DDR800 mode it is.

Im really considering, how annoying it's starting to get, to throw it all out and plug everything on my DQ6 and see how that goes because this makes no sense.

I'd drop the cpu and nb multi and inspect how far ref HT goes. Then id try to reach 2.8GHz with an 13 or 13,5 cpu multi and an 9x nb multi via small ref HT increasements.

[Brother Esau]

yeah finally i made it.. it also does at lower volts as in your screeny, but unpacking and installing ati drivers seemingly was not stable.. so this is truly no suicide run

i think it was the odt pin fine delay option (disabled now) and/or xp vs. vista 64bit..

now trying to go some 3d benching, but aquamark crashed last time.. i'll see..

start with 3.6ghz and find what the lowest Voltage you can get it stable with and then work from there with 10mhz at a time I am really pretty sure that 1.5v + is not needed at all just be patient and keep in mind that the chip excels at lower voltage as you have seen already

Also I still think the best Bios for that Processor is 11/22/07

[justapost]

ahh, justapost, i have measured vdimm.. at 2,4v bios i got 2,4v dmm at that abandoned capacitor place in between the slots...

U use DDR and not DDR2 ram over there? 2.4V those GSkill's are normaly rated for 2.1V max.
However thank you for the comparison, seems the difference diminishes with higher voltage.
Congrats to your advance in 6400 overclocking.

[Oese]

no its 2GB corsair 90nm promos ram now.. that'll be not possible with the gskill...

@be: yepp i think theres enough room left to spend some lonely saturdays with.. for now i'm pleased (wanted to see and redo that 3,63ghz you showed me ) and tired btw

i'll also go outside some cool night and try out some more mhz there..

[Brother Esau]

no its 2GB corsair 90nm promos ram now.. that'll be not possible with the gskill...

@be: yepp i think theres enough room left to spend some lonely saturdays with.. for now i'm pleased (wanted to see and redo that 3,63ghz you showed me ) and tired btw

Wake up

[RobPuba]

Newegg don't have the DFI LanParty UT 790FX-M2R listed anymore

[Oese]

Wake up

sorry bro i'll just drink some more beer and slowly pass off onto my sofa

[Tony]

Thank you for the tip tony but in do not use Vista here.

Thanks Tye,
My main goal is to find out if the nb voltage is really total independant from cpu speed and voltage.
Currently it looks like I require higher voltages with 70°C cpu temps than with 60°C. Also the nb starts to fuel the chip at 2.4GHz/1.4V, i get ~3°-4°C higher temps.

Nice, good to see the chip still works. With no chef looking over my shoulder, it's hard to cope with myself here, so may things waiting for reinvestigation.


I'd drop the cpu and nb multi and inspect how far ref HT goes. Then id try to reach 2.8GHz with an 13 or 13,5 cpu multi and an 9x nb multi via small ref HT increasements.

I thought it ran on XP also, there is a 32bit version as well as 64bit

[Tony]

Newegg don't have the DFI LanParty UT 790FX-M2R listed anymore

sapphire have the same board, remember if you order from the EU you can save the VAT tax if you are in the usa.

[Slagathor]

Newegg don't have the DFI LanParty UT 790FX-M2R listed anymore

I am glad I didnt wait till next month to order mine.....heh

[RobPuba]

I just wonder why they pull it from the site......

I am glad I didnt wait till next month to order mine.....heh

[Brother Esau]

They are discontinuing the 790FX-M2R

You can get one Here where I got mine from at MotherboardPro.com .....tell Mike I sent you please or Melissa either or!

Mikes user Name on the Forum = motherboardpro
http://www.motherboardpro.com/DFI-La...ATX-p-404.html

[Oese]

crazy folks at dfi, the best boards live about half a year...

ok, when the sb700's are about to come now, i wouldnt mind

[RobPuba]

Since I have my board a couple of weeks...... I'll just upgrade my CPU, Video card and heatsink..... I won't have the money for awhile anyway.

They are discontinuing the 790FX-M2R

You can get one Here where I got mine from at MotherboardPro.com .....tell Mike I sent you please or Melissa either or!

Mikes user Name on the Forum = motherboardpro
http://www.motherboardpro.com/DFI-La...ATX-p-404.html

[Brother Esau]

crazy folks at dfi, the best boards live about half a year...

ok, when the sb700's are about to come now, i wouldnt mind

Actually I have no idea whats next on the Road Map for DFI/AMD Would like to see something with IGP chip for Crossfire X though

[vext]

Newegg don't have the DFI LanParty UT 790FX-M2R listed anymore

I probably snagged the last one with my RMA.

[keithlm]

I probably snagged the last one with my RMA.

So it was YOU.

They were out when I RMA'ed. So they gave me a refund. Dang it. I wanted that board. Oh well. Perhaps if a new chipset is released with the SB750 and it turns out being PHENOMenal then I'll get one.

My Phenom RMA should get to Newegg tomorrow morning. If I'm really lucky they might get a new one into overnight UPS by tomorrow night. (Luckily I paid overnight when I bought it. They use the same method for shipping the replacement. I should have it by friday at the latest.)

[KTE]

no its 2GB corsair 90nm promos ram now.. that'll be not possible with the gskill...

Watch out, they usually die above 2.3v - I've had 3 kits of them. There's no point in feeding ProMOS kits that much voltage since they have an onboard regulator which won't allow more than ~ 2.25v to the MEM ICs and the rest will just get converted to heat

DFI ending M2R; well what do you expect. Every other individual runs to RMA at the tiniest problem or disaster they cause, and with very expensive, limited and very time taking projects like this, they're left no other choice. RMAs are very costly to the MFG