Espique

Hi,

I recently upgraded my rusty XP 2200+ to an all new and shiny 939 motherboard (MSI K8N Neo2 Plat.) and AMD Athlon 64 3000+ (90 nm Winchester). While upgrading these, I kept my original Kingston DDR266 Ram.

With that combination I was able to overclock the CPU to 2.6 Ghz easily, while having set the memory to 140 Mhz (by using dividers set to DDR100). Great stuff, but I wanted more so I also bought some new (and frankly: cheap) DDR400 memory (TwinMOS 512 Twin.x2). And that'S where my problem starts:

That memory doesn't seem to like me. I have set it to DDR333 (166 Mhz) and can not go over 2250 Mhz CPU Clock now. Going higher results in total system instability, crashes and system resets. Strangly enough, setting the memory further down to DDR266 (133 Mhz) it gets worse.

What could be my problem here? I know it must be the memory but I am sure this can be tweaked somehow. Maybe I am using too much/less voltage on the RAM (I read some RAM doesn't like increasing the voltage)? Or I will need to have some other timing settings, but I have no idea of those.

So some help would be greatly appreciated. My current settings:

RAM: 166 Mhz, 1T, CAL 2.5, rest is auto
RAM Voltage: 1.7
HTT: 250
HT: 3x
Multiplier: 9x

Let me know if you need more details.

Thanks!

mkk

Could possibly be that the new RAM doesn't cope as well with the timing values. Try 2T command and CAS 3.0 and see if it helps compared to your current 1T and 2.5.

Espique

thanks. Tried using CAS 3.0 but then the machine does not POST. Setting 2T didn't help.....

zerodamage

I've noticed with the MSI boards that it is best to let the BIOS determine the RAM timings and to also keep any "Agressive Timings" features in the bios disabled.

Espique

yeah that's what I have here. Most stuff is on auto and aggressive timings as well as auto overclocking is off....

Vampyromaniac

are you sure your RAM voltage is at 1.7v? because it should be at least 2.5v
also, make sure your AGP/PCI are set to 66/33 MHz
it could be that the motherboard is picky with that RAM . . . .

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Espique

nah of course the voltage is at 2.x and not 1.x. that was just a typo. AGP/PCI are locked as well.

dipstick

Try raising the tRCD memory setting to 3 or 4.

davidnsibs

So your RAM setting is at 166, and HTT at 250. Is my Math correct here:

(250/200)*166 = 1.25*166 = 207.5, so your DDR 400 RAM is running at DDR 415 ... not an amazing overclock, but an overclock all the same.

I know you said you tried the RAM at the 133 setting, but have another go maybe because this would allow you (running the RAM @ the 207.5 found previously):

(207.5/133)*200 = 1.56*200 = 312HTT

So at 312 HTT you could have a cpu at 312*9 = 2808, ok your CPU will never hack that without some liquid nitrogen and lots of voltage adjustment, but you see my point, try relaxing the memory setting again (staying at SPD timings), it doesnt make sence that it makes the situation worse

__________________

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Espique

@davidnsibs:

I would love to put the RAM down to 133 to get the HTT up, but no matter what I try: as soon as I have my memory at 133 and put the HTT above 220, the machine does not POST. Ain't that rediculous?

I can set the memory down to 100 but then I will have very slow memory, even if I push the HTT above 280.

The point is: why doesn't my memory like the 133 mhz? Might this be a BIOS issue?

On a sidenote: Can you guys recommend a budget memory to fit this situation? I think I am going to try and return these sticks.

davidnsibs

alright, ive been having a little look on msi's website and might be able to suggest something. there are reccommended slots to use for your RAM, especially if its double sided (which i guess it will be if its value 512mb ddr400). see this webpage:

http://www.msi.com.tw/program/produc...il.php?UID=572

now notice if you use slots 1 and 2 then you can run @ ddr400, but use slots 2 and 3 and can only use ddr333, maybe youve got yours in 2 and 3, so maybe try to swap them to 1 and 2 instead. if not, sorry, thats my best guess :-) oh i suppose youve got the latest bios installed yeah?

EDIT: oops sorry got the wrong socket, its this page:

http://www.msi.com.tw/program/produc...il.php?UID=607

so you want slots 1 and 2 _or_ 3 and 4 but _not_ 1 and 3

__________________

Goodbye 9500pro, you've been a faithful servant through Half life, Deus Ex, Unreal 2, Max Payne 1+2, Nolf 1+2, CoD, Far Cry, Civ IV, F.E.A.R and many more

dipstick

If you're going to exchange try to get some memory from Corsair or OCZ. It seems the board just doesn't like to OC your memory

Espique

yep and thanks for looking that up. you are right, the memory is actually two-sided. but I am running it in slots 1 and 2. and it's actually not ddr400 that's causing the problem, it's ddr266 (to which I want to set it to be able to push HTT and raise the memory clock with it).

BIOS is the latest beta...

this is so odd it can only be a bug I guess. I don't see any reason why I would not be able to get the RAM working at ddr266.

Espique

it does OC the memory fine in ddr400 mode. not much, but it does. I am having problems to underclock it to something like 180 mhz or so by using a divider (133 mhz).

this is wierd.

dipstick

If you want to OC the HTT make sure you are setting up the cpu voltage correctly. Set cpu voltage to 1.4v and set the Over Hammer VID setting to +10%. If you dont want to give the cpu that much voltage leave the VID at +10% and drop the cpu voltage to 1.3v. Having this at +10% is very important for OCing the htt and if you haven't set it like this its probably not your mem holding you back. Give it a shot.