Gigabyte GA-MA790FXT-UD5P Thread

[shaolin95]

I agree. When I was buying RAM I was surprised that many of the OCZ Reapers with all the fancy cooling was using a lot more juice to hit tight timings compared to their platinum which was pretty much the same price.
I went with the low voltage of course and couldnt be happier. :-)

[charged3800z24]

Yah honestly although the IMC appears to be impervious to damage with high volt ram ( at least for benching have not tested for 24/7 useage ) its not to keen about it......I notice after 2.0 volts its not very happy.....if you can get ram that can pull the same timings at reasonable volts I see no point in the high volt stuff.

How much are those DIMMS? I am looking at getting the 955 and 2x2GB DDR3.

[chew*]

How much are those DIMMS? I am looking at getting the 955 and 2x2GB DDR3.

Very affordable......they will do 6-6-6 also......Haven't gotten that far with them yet however, finallyzing bullet proof easy settings for those that just want a stable set of 1600 ram at low volts on the gigabyte....


Might get stuck with an extra stick but you can bin them.......maybe Tony can suggest where to get them in 2x2g variants.
http://www.mwave.com/mwave/viewspec_...iteria=BA26056

[Tony]

Very affordable......they will do 6-6-6 also......Haven't gotten that far with them yet however, finallyzing bullet proof easy settings for those that just want a stable set of 1600 ram at low volts on the gigabyte....


Might get stuck with an extra stick but you can bin them.......maybe Tony can suggest where to get them in 2x2g variants.
http://www.mwave.com/mwave/viewspec_...iteria=BA26056

Best bet is buy 2 kits, bin them for the best 4 and sell 2 on for now

I will try and get a 4GB kit for AMD boards also in the works.

What would be a popular heatspreader option or you guys not bothered?

[naokaji]

What would be a popular heatspreader option or you guys not bothered?

Personally I care more whats below them

Anyway, out of the cheaper OCZ Ram I think this heatspreader look the best.
For the higher end ones, the reapers are nice, but due to potential issues with cpu coolers (Air coolers keep increasing in Size) I'd think the ones from the Blade series would be the best option.

[Slappa]

More voltage will not help the majority of these chips.....they like low voltage...Honestly I really don't have time to try getting 4 gig stable ( I did it on the ddr II 790FX board ).....I'm very busy and working on other stuff currently.......like specifically ram clocking which is currently horrible with the 955's on this board......

I have stated memory is the KEY to Ocing PHenom II's so this most likely is the source of your issue anyway..........try doing this instead.......And don't use 1600 divider for now.........if you can't get your RAM/NB(IMC) to pass prime blend you will never get the cpu to 4 gig.........You really really need to seperate everything into categories.........then try to mix them together.......Try finding voltage necessary to pass prime with higher NB frequncy with ram and cpu underclocked.........then try with ram clocked.............then turn those down and find voltage needed for a cpu clock only...........then put it all together............

Little tip......errors at 8K, 10K and so on are cpu errors........errors 1024K 768K and such are memory controller/memory related.........

Example memory and NB ( internal memory controller ) clocks combined........These are the new low voltage OCZ animals I'm using here.....1.65v Death to high volt ram kits................

Chew,

Thank you for the comprehensive answer. It really is appreciated.

I will do some extensive testing tonight and see where I can get. However, there is the limit where a new bios is needed for this board.

I'll post back with results.

[chew*]

I think for compatibility reasons you guys should stick with the low profile heatspreaders....I can fit this ram under my true 120 and xigamatek without having to remove the heatsink........

We won't talk about what I had to go through with another ( we won't say names ) manufacturers "high" performance ram.........that apparently wasn't to compatible with the outer banks......


Slappa I think I was using +.275 for that screenshot.....It realy depends on cooling capacity and the chip though. I would highly reccomend for now using the F3L bios and disabling bank interleaving.....There will be a small performance hit but alot less aggravation.....the above was done with bank interleaving on but it took me quite some time to find the sweet spot....with bank interleaving off it will be far easier....

I will put some settings up once I am happy with them and feel they are consistent/reliable.

[Nedjo]

I think for compatibility reasons you guys should stick with the low profile heatspreaders....I can fit this ram under my true 120 and xigamatek without having to remove the heatsink........

+1!

[shaolin95]

For what is worth I think this OCZ is just an outstanding deal:
http://www.ocztechnology.com/product...module_4gb_kit
I actually got it for $10 less with the rebate but not the free thumbdrive though.

[chew*]

All right in an effort to help you guys out despite the fact that I really don't have the time to be fooling around with prime stabilty on a "benching rig" I decided to pop up something that should be fairly easy to acchieve........

Forget the 4gig OC I did. I did it with NB underclocked to keep the heat down etc not geared for performance. Can you bench at 4gig with NB up yes.......can you Prime? I highly doubt it, not on air....

System.
Gigabyte MA790FXT-UD5P
OCZ Animals 2x2gig ddr III http://www.mwave.com/mwave/viewspec_...iteria=BA26056
4870x2
PC P&C 1200 turbocool
955 BE unlapped
Thermalright True 120 Lapped/ w artic silver ceramique
Scythe Ultra KAZE DFS123812L-2000

Ambient temps taken via DMM 24/25C

A misc fan cooling PWM...........

Personally this is not my cup of tea, all components should be being kept cool but I was trying to duplicate what some users might get for case temps with no fans or circulation I however refused to cook my PWM just for a screenshot......



Bios setting for those using this ram, a 955BE and this board......... (these settings are geared towards this ram, and this board.......They are most likely not going to work with other ram)

There is room for improvement, working on tighter settings now.......As always vcore and or CPUNB vid will vary depending on CPU......

[charged3800z24]

I like that bios...more voltage options

[chew*]

Great because its the public bios on gigabyte's site

And how about a comparison of what my 940 need for prime on my gigabyte DS4H.

[akacinna]

I got my 790FXT yesterday. Going to use it with an ECS A790GXM-AD3 in a review of the 955.

[charged3800z24]

Great because its the public bios on gigabyte's site

which one?

[shadow_419]

which one?

F3L bios from the cpu-z screenshot

[charged3800z24]

F3L bios from the cpu-z screenshot

What the,,,, I have that bios... I bet they are hidden setting. CTRL F1 here I come.

[chew*]

And to wrap this up here's EASY 4gig air bench settings...........add.025v to bios settings above drop fsb 2 notches, up the cpu multi 2 notches... keep all components as cool as possible........If your memory is not as stable as I have gotten the OCZ animals.....etc they won't pass prime blend at prior speeds.....you WILL NOT be able to achieve this...........

Please note they were Boot settings as shown by identified cpu speed in Wprime........no smoke or mirrors or K10 stat.....................

Enjoy.

[chew*]

Last but not least.

For this particular ram dimms 1 and 2 will offer you the best performance/clocks, I will be tweaking them further in the next day or so but unfortunately from this point on the tweaking will be of no help to 90% of you......Drive strength tweaking tends to have individuality, not only what the user is going for but the individual cpu/motherboard and ram will really determine the best drive strengths to use.....

Trying to get Tony to post up a How To Tune Drive Strengths sticky as he can explain how to do this better than I can.......Be patient he is a very busy guy and has his plate more than full at present time.....

Also would like to note that bank interleaving off has a side effect/performance hit.......unfortunately the gigabyte needs more work in the ram department. I will be getting on there case to address these issues ASAP as shutting bank interleaving off is just a bandaid......However for now it will save alot of you headaches if you shut it off.

[ChrisB17]

After thinking it over. I think I am going to RMA the 790x for the FX version. It seems stable and pretty straight forward. Would anyone say otherwise?

[bro20000]

Chew what bios is that am using F3L and it doesnt look like that and thats the latest!

[chew*]

Well my guess is that the 955 BE unlocks some of these options It's F3L off gigabytes website. As I stated.........my settings will help those with a 955BE............using these settings for chips other than 955 BE won't do much good........the IMC revision is not the same.....For future reference you can look at my cpu-z screenshots.........I include them almost always for a reason...the mainboard tab ID's what board and what bios I am using.....

In fact I know for a fact these settings will not work, 720 BE's require far more voltage.

[charged3800z24]

Well my guess is that the 955 BE unlocks some of these options It's F3L off gigabytes website. As I stated.........my settings will help those with a 955BE............using these settings for chips other than 955 BE won't do much good........the IMC revision is not the same.....For future reference you can look at my cpu-z screenshots.........I include them almost always for a reason...the mainboard tab ID's what board and what bios I am using.....

In fact I know for a fact these settings will not work, 720 BE's require far more voltage.

955 will be ordered this weekend...if wife doesn't find out shhh I will most like have to sell a 940.

[suphiceto]

Today I reinstalled my OS, I was on 64bit windows7 and now back to 32bit vista. For that reason I had some head room to tweak and play with my clock settings and I have achived these benchmarks with my 720be 4 cores OCCT stable (will be priming tonight)


I am a little worried about the cpu-voltage. Do you guys think, is it too much for 24/7? Temps idles around the 30s and never above 50C on full load.

Also, thanks to Chew, I found the solution for my random freeze ups. It was memory voltage and needed to be higher. Glad it is not problem anymore!

[bingo13]

Today I reinstalled my OS, I was on 64bit windows7 and now back to 32bit vista. For that reason I had some head room to tweak and play with my clock settings and I have achived these benchmarks with my 720be 4 cores OCCT stable (will be priming tonight)....

On average with air cooling, you will have about 200MHz more headroom with Vista 32 over Vista 64 at like settings once you hit the 3.7~3.8GHz range. On good water, the difference is about 300MHz between operating systems and on LN2, oh about 2.1GHz. Right around the 3.95GHz range with Vista 64 or Win7 64, you will hit a clocking wall. So far today, we finally hit 4.3GHz stable on V64 with LN2, exact same settings on V32 got us 6.4GHz.

[chew*]

On average with air cooling, you will have about 200MHz more headroom with Vista 32 over Vista 64 at like settings once you hit the 3.7~3.8GHz range. On good water, the difference is about 300MHz between operating systems and on LN2, oh about 2.1GHz. Right around the 3.95GHz range with Vista 64 or Win7 64, you will hit a clocking wall. So far today, we finally hit 4.3GHz stable on V64 with LN2, exact same settings on V32 got us 6.4GHz.

Ouch.