8rda+ with A1(C1) can't reach 200MHz FSB

[SgtBudde]

Hello!

How many of You ( 8rda+ with A1(C1) NB ) owners can't use 200MHz bus. Or am I alone?

[Spamz0r]

i know i have a rev 1.1 mobo, but not sure on the NB version, with one stick of Corsair XMS PC3200 CL2 i can run it at 200FSB

but in dual channel it wont... :/

strange that epox classifies all boards with C1 NB to run at 200Mhz FSB with the latest bios when some boards can't do it.
BTW, mine does about 225Mhz w/o problems.
U sure its not your ram stopping you?

[cpend]

I have A1/C1 NB and can do 225 easily. I currently run @ 220 x 10.5 24/7 with Vantec Copper Iceberg on NB and Passive Vantec Heatsink on SB. Ram setting @ 3-3-3-2, Twinmos (1) 512 Module.:-D

[SgtBudde]

My topic was a little bit wrong, but the idea was if there is 8rda+ boards around that can't run at 200MHz.

I'am using 3x256MB Kingston Value RAM PC2700 now and I'am just curious if buying better/expensive memory will help Me at all.

At the moment I can use 180MHz bus but anything above that is too much no matter what DIMM-voltage I have. Board just won't POST and I must clear CMOS to get it back on again.

Earlier I had one 256 MB PC2700 with "Elixir"-chips on it and the result was same.

RAM timings won't made any difference.

So now I have this XP1700 running 12x166, but it would be nice to have more bus

[SteveI]

SgtBudde,
I doubt your board is holding you back... You are using PC2700, which is only meant to run 166mhz... Getting 180 out of 'em is actually pretty good. Also, running 3 at a time.... I'm quite amazed you can run that fast.

If you can beg borrow or steal... get yourself some really fast memory.... Then, maybe you can find out what your mobo can do.

I just got my nforce2 mobo, and now I can finally take full advantage of my XMS3200... After the first boot up, it went straight to 200mhz, and I have yet to start pushing...

[SgtBudde]

http://www.pcstats.com/articleview.c...id=1140&page=1

That gave Me an idea of high bus-speeds.

[SteveI]

Originally posted by SgtBudde
http://www.pcstats.com/articleview.c...140&page=1

That gave Me an idea of high bus-speeds.

Um... that review was June of 2002. Today it is totally meaningless. Like CPUs... when it was made impacts performance like crazy.... Since that time, newer, faster memory has been introduced. If they can get that kind of performance, odds are they would sell it as PC3200 instead.

I have a 512 stick of Kingston from last year. It is really sweet. It can't to 1t, but does 2-4w-5-2-2-2, all the way up to 200fsb.

Also, Samsung PC2700 was once da' bomb... now the new stuff is mostly crap. I think they are PC3200 rejects, personally. Earlier this year, I got 3 sticks in a row that needed 2.6-2.7v just to run stock. I complained so much, I got a refund.

The bottom line is, don't expect huge overclocks from middle of the road memory... If it could still do that, they would be charging a premium, and bump it up to the next level.

[bETAbILLY]

Drop the multiplier and (in steps) raise the fsb eventually to 200. As you progress, run Memtest - test #5 from a floppy to help prevent file corruption if you push the envelope too hard. Test #5 really taxes the cpu L2 cache. That will help determine if the cpu is holding you back.

Good and pricey PC3200 and higher ram is a worthwhile investment since K8 systems will be able to use them.

[reever2]

What chips are on the memory?

[Chewie]

Just changed my old good rev 1.0 A2 Northbridge for a brand new rev 1.1 C1 Northbridge
Everything's running fine at 210Mhz for me

[EPoX Tech]

Running CAS2 on those modules is a no no - CAS2.5 may yield some suprising results - this is the first of what is designated level 2 memory with 3/4 phase plane switched voltage - it may go far at CAS2.5

[geekbyte]

I have my Corsair xms pc3200 512mb stick of ram running at 215 FSB and working fine for me. CAS2 6-3-3-3

im thinking of getting the dual DDR OCZ ram the pc3500.

But im affraid of not getting the speed i will get with one stick. I have seen some reviews of ppl going from 215 with one stick and not getting over 190 after with two sticks.

Oh yes i also have the C1 stepping.

[Chewie]

I forgot to say that I'm of course running in dual ddr sync at 210Mhz , with 2x256MB Winbond 5ns PC 3200 Cas2-2-2-7

[SgtBudde]

Those Kingston-memorys I have are using Winbond BH-6 chips (same as in that article I posted earlier).

Right now I am running at 183MHz bus with 6-3-2-2 timings.

I keep testing more later.

[SgtBudde]

OK!

10x200MHz, as funny as it seems, but I was'nt too optimistic at the start with this board and memory sticks.

I rised DIMM-voltage to the max and lowered memory timings to 8-3-2-3 and result was no POST.

Now i have DIMM-voltage 2,77V and timings 6-3-2-2 and so far this systems seems stable.

I thing I'am gonna stick with these settings for a while.

Cheers all!

[Aedan]

Originally posted by SgtBudde
I rised DIMM-voltage to the max and lowered memory timings to 8-3-2-3 and result was no POST.

Yeah, there's a "window" in which the DIMMs will operate. If you try to operate too fast or too slow then corrupt data will occur. So, setting DIMMs to their slowest settings doesn't mean that they will operate. Generally the high performance DIMMs won't tolerate slow settings.

Áedán

[EPoX Tech]

Very much like retarding or advancing flywheel timing on an electronic ignition .........

[Burrens]

I can't reach 200 FSB either. I accidentally shorted my A3 board while doing a mod, so I got another board, which happens to be a C1 stepping. On the old board I could hit 200 FSB no problem with vdd mod, but I cannot acheive 200on the newer board. Board doesn't even go through all the bios checks. I know its not the ram, I have 3200 Twinmos/winbond sticks 2*256, because I was running stable at 200 with 3-2-2-2 timings on the old board. What do you guys think? Should I RMA?

[arno lips]

Well..... eat this, running stable with all components

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