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I thinks its a dud...

Last response: in Memory
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March 27, 2003 11:45:09 AM

Just a wild guess but I think my new 256mb PC2700 DDRam from Twinmos is a dud...

Fired it in to go with my other 256mb PC2700 Twinmos (both are CL2.5 non ECC) & it succeeded to cut the memory perf to less than that of a KT133 & dropped my XP2000 to a Athlon 1250 !!! (well according to Sandra2003 & 3dmark2001se) all done on a SiS746 chipset set to auto memory setting/timing...

have I forgotten to do anything or is this a simple RMA situation ???

Hmmm, wonder if I can get a valid page fault ???
these invalid ones are far too commonplace...

More about : thinks dud

March 27, 2003 12:06:35 PM

did the FSB get dropped down?

<i>It's always the one thing you never suspected.</i>
March 27, 2003 9:23:15 PM

down to 100 from 133
ie 12.5x133=1663 Vs 12.5x100=1250


Hmmm, wonder if I can get a valid page fault ???
these invalid ones are far too commonplace...
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March 27, 2003 10:20:34 PM

almost sounds like they sent u a stick of 100mhz ddr (cant remember number)
can u change the fsb back to 133 manually?
March 27, 2003 11:50:47 PM

set it back up to 133. It probably just got wiped back to default, which is usually 100.

<i>It's always the one thing you never suspected.</i>
March 28, 2003 8:50:59 AM

will try but i think it says in the bios its set at 133fsb but upon booting it is 100...

Hmmm, wonder if I can get a valid page fault ???
these invalid ones are far too commonplace...
March 30, 2003 2:27:06 PM

Many if not most motherboards that support DDR memory will underclock the FSB and memory if more than 2 sticks are used. I suggest you try to test your sticks one at a time, then 2 together and finally all 3, cycling them so you tried all possible combinations in different slots.

Your motherboard manufacturer should have a FAQ or something about that issue, look it up.

Fok Speling Misstake
March 31, 2003 8:40:23 AM

got both the PC2700 modules to work, but only at normal memory timing settings, crank it higher & the new module will not let the PC power up at that setting, will revert PC to 100fsb...

my other PC2700 will run fine at all memory timings & my old PC2100 module will run all memory settings fine as well...

would this mean there is a fault with my newer module ??

Hmmm, wonder if I can get a valid page fault ???
these invalid ones are far too commonplace...
April 2, 2003 3:31:19 PM

Well, am hoping the next on will work better, am RMAing this one

are memory chips this erratic in performance ???
ie 2 diff Twinmos chips all CL2.5
module 1 256mb PC2100, any memory timings work
module 2 256mb PC2700, any memory timing work
module 3 256mb PC2700, safe & normal work, but fast, turbo & any higher ones do not work...

(all tried on their own on my board in slots 1&2)

Hmmm, wonder if I can get a valid page fault ???
these invalid ones are far too commonplace...
April 17, 2003 11:59:34 AM

Well, got me new memory module, it works better than the last one but not as good as my first Twinmos... the new one will go to fast mem settings (no turbo or ultra, damn I miss being able to manually setup memory timings...), no higher b4 I get the same old problem, interestingly though, on boot it has my system at cas 2 and both these modules are only cas 2.5... no overclocks either (tried boosting the ram voltage but no diff between 2.6 & 2.8)

I suppose I can make do with this till I get my nforce2ultra, then I get meself 2xDDR333 or 400 quality pieces & the fastest CPU for 100 quid (bout $150 to u US folks) & that should do me till Athlon64 or whatever is about...

Hmmm, wonder if I can get a valid page fault ???
these invalid ones are far too commonplace...
April 20, 2003 4:25:22 AM

<i><b>Many if not most motherboards that support DDR memory will underclock the FSB and memory if more than 2 sticks are used. </i></b>

SidVicious,

Please explain this issue. I have two sticks, 256mb pc2100 each. Will their performance will inferior to a single 512mb pc2100 stick?

Thanks...





/\/\ito
April 30, 2003 12:27:44 PM

not if you have a nforce2 board, in that case 2 is better than 1, any other board, it shouldnt make much of a difference in actual performance

Hmmm, wonder if I can get a valid page fault ???
these invalid ones are far too commonplace...
!