suggestions/help on 8RDA+/Twinmos problem...

[Swiftdeathz]

Hey guys this is my predicament.... I have 2x256MB Twinmos(supposedly Winbond relabeled) sticks and 1x512MB Twinmos/Winbond....

I know that motherboard can handle up to 216FSB DC because that was the max I was running when i had just the 2 sticks of Twinmos...

Now when I try to run all 3 sticks at once I seem to be stuck at 205FSB... I tested each stick individually and 2 of the sticks were good up to 210FSB CAS 2-2-2-6... The other was good up to 210FSB CAS 2-2-3-6....

I even tried to just put the 2 sticks that could do 210FSB at tight timings in DC and when running MemTest I get a ton of errors in test#5....

Do you think this is a limitation of my motherboard and possibly one of my DIMM slots being not as good as the others? or just a problem with the motherboard not wanting to play along with the very similair brands of RAM???

I tried posting for help on AOA forums and came up empty... The Epox tech gave me some smock remark about how with 3 DIMMS you lose stability, yet I know others that run with the 3 DIMM's occupied and at high FSB...

I'm stumped as I've tried everything I can think of...

Thanks for any help anybody can offer...

[Swiftdeathz]

no ideas huh... :confused: :(

[Evil_Spork]

it has to do with teh dual channel memory i bet! two sticks is best. 256 sticks OC the best too, so think of that and do some testing.

[CCW]

People have been experienceing problems with two and three sticks, its apparently due to the third DIMM slot and whether you get a good one or not depends on how lucky you are, perhaps more voltage would help with all 3 DIMMs filled but Im not too sure.

[Swiftdeathz]

tried all sorts of voltages... In fact sometimes going with more voltages gives me more errors than less voltage...

Oh well... I guess 205FSB is nice.... I do enjoy having 1GB... ;)

[megatron]

Up the Vdd to 1.85. Thats my best guess. That is if you cant isolate a weaker DIMM slot (which I have heard of before on 8RDA+). 3 DIMMs populated is going to take more voltage I would guess. However none of your memory is quite the best type i.e. twinmos pc3200 256Mb w\winbond. As for the 512Mb stick that is doing very well if it can reach 210, judging by a review I read of them.

[Holst]

Test each DIMM on its own... see if the new one is slower than the others if its not the board may be the limitation.

It is true that overclocks tend to suffer when mixing memory types and running more memory sticks... its not a hard and fast rule but its happened to me on my 8rda+

As megatron recomends if it is a board/chipset limitation more VDD and VDDR may help.

[Swiftdeathz]

I tested each RAM DIMM on it's own... The RAM is as close to being identical as they come... Twinmos both of them... Except 2 of them have Twinmos chips (which the seller told me were Winbond chips relabeled) and the other are Twinmos with Winbond chips...

Only thing I can think of is that one of my DIMM slots is the limitation...

And as for pumping more VDD voltage I'm kinda hesitant... It still has the default NB heatsink which I have yet to remove and also don't have any other resistor other than the 1k ohm that I used...

[MrLavender]

Try testing the 3 slots individually in single channel mode (with Memtest86 test #5), that should tell you if one of them is worse than the others. I've seen many ppl with NF2 boards where slots 1+3 will clock higher than 2+3 or vice-versa, just seems to be a matter of luck whether you get a board like this or not.