DFI Crossfire Motherboard and 4x512MB 1T

**Tony** · 10-10-2005, 08:50 AM

So to address a few issues.

Cold bug

As you chill an A64 the stength of the memory controller increases, so the colder you go the more you over drive the dimms. So you have to weaken the drive.

You do this on both the memory controller and on the motherboard

1T with 4 dimms

Oskar aparantly has a bios that allows ddr406 or so with 4x1gig dimms at 1t for the old NF4 LP boards. He promised this bios to a friend of mine last week...we still have not seen it though. If you are lucky enough to have Oskars IM details you will notice he is advertising this info in a nice MSN header...so i would say he is pretty excited about it.

I know there are ways to increase the amount of drive the memory controller can deliver and i will say with the correct board 1t 4gig is real...i have done 4x512 1T at 200fsb but this was with pure determination and 4 sweet dimms so don't ask me to do it again till i get oskars new bios to play with

Ram overclocking in general

Guys there is a lot happening with motherboards you don't know about, just applying voltage does not get the job done any more. I had a recent lengthy conversation with Oskar and we both agreed the biggest gains with ram on any board are made with drive strength tweaks and memory termination resistance...both of these do not involve any voltage increase.
Motherboard manufacturers used to just focus on the CPU for overclocking, now we are seeing a push to address the ram issues. Its something i have been pushing for a good while and you have seen the products of some of the conversations with the new breed of boards coming from the likes of DFI etc, and please understand they are listening to quite a few skilled enthusiasts, not just me.

Please embrace what im trying to tell you here, grayskull is actually hinting as best he can also on some of the same. Just because an AMD CPU white paper insists 4x1gig =2t does not mean it has to be so, you all need to appreciate there are people out there who do push the envelope and will do what is impossible.

now to finish

I have a CF-DR on the way from Taiwan, its a final release retail board and i will be posting with it as soon as its here. it is a 6 layer board.

CF-BT has been pushed back 2 weeks I hear but its still a reality, its based on a 6 layer design not 4 layer and the memory traces are being spread over 4 layers to improve crosstalk, thats the only tweak it needed. I have fellow testers doing 315fsb+ on the ATI reference easy with TCCD so how much improvement DFI will make i have no idea, its already a fine strong board.
NF4 expert will ship to me sortly after CF-DR and again i will post what i think and find of it, Xs will be the first place with info i hope.

**perkam** · 10-10-2005, 09:04 AM

With your new name I keep forgetting you're BigToe

But you getting a CF-DR is awesome

Looking forward to that. Seems sampsa will be getting his next week too.

Any chance of any of these boards (BT/DR) being under $200 on launch ?

Perkam

**Sampsa** · 10-10-2005, 09:10 AM

Originally Posted by perkam

With your new name I keep forgetting you're BigToe

But you getting a CF-DR is awesome

Looking forward to that. Seems sampsa will be getting his next week too.

Any chance of any of these boards (BT/DR) being under $200 on launch ?

Perkam

In Finland CF-DR is 249 euros! That's insane.

**Tony** · 10-10-2005, 09:14 AM

I have no idea on pricing, I would expect them to be expensive to start with then settle towared xmas.

**babyelf** · 10-10-2005, 09:23 AM

awesome news Tony

can't wait till we see ur board..

i mean DFI BT board

**don_vercetti** · 10-10-2005, 09:29 AM

yeh i mean, if that can run 4 sticks 1t that will be AWESOME. And knowing what DFI are capable of....well the best of luck to them, and since i know you've been a massive help to them (it's YOUR dfi bios im using at the moment!) kudos to you for being such a driving force.

**Vassili** · 10-10-2005, 09:29 AM

I think the BT joke is driving him mad

But indeed 4x Dual Sided Modules @1T is insane man! GREAT NEWS

**cadaveca** · 10-10-2005, 09:32 AM

Originally Posted by Tony

I have no idea on pricing, I would expect them to be expensive to start with then settle towared xmas.

Thanks for the info Tony! With that all said I am more than happy to wait until Christmas to go Crossfire.

Personally, i know 4 sticks of 5b-d chips single-sided(for 2 GB) gives 2623mb/sec in memtest 1.55 @ 3-3-3-8-11-14-2-3-1-2 @ 200mhz, so i'd love to see a board offering it stable, 'cause i can almost get it now, but not quite.I can feel it there, tho, so your info comes with much anticipation.

**hipro5** · 10-10-2005, 09:45 AM

I want to add based on what Tony said, don't expect the same Ram overclockability with(even) 4 x 512MB rams at 1T as you will have on another config with 2 x 512MB........Am I wrong on this?......

**cadaveca** · 10-10-2005, 10:37 AM

I don't think so, but i'm pretty sure they are aiming for 4gb 1t, and i am thinking of single-sided...might work out the same as going 2x256, ykwim? It all really jsut breaks down to math, so it SHOULD be totally possible.

**AfterClock** · 10-10-2005, 10:42 AM

Originally Posted by cadaveca

I don't think so, but i'm pretty sure they are aiming for 4gb 1t, and i am thinking of single-sided...might work out the same as going 2x256, ykwim? It all really jsut breaks down to math, so it SHOULD be totally possible.

1GB module, single-sided ? huh...nope

**cadaveca** · 10-10-2005, 10:44 AM

duh...read my sig smartass.

i already have the single-sided versions of the 1gb modules out now...hence the same as going 2x256 from 512?

**Vassili** · 10-10-2005, 10:49 AM

But 4x Single Sided modules -nomatter what size- do already run @ 1T command, don't they?

**Ugly n Grey** · 10-10-2005, 10:53 AM

If you guys want to discuss memory timings, why are you doing it in an ATI 1800xt thread? We have memory forums. Please do move the converstation.

UnG

**Tony** · 10-10-2005, 11:05 AM

Originally Posted by Ugly n Grey

If you guys want to discuss memory timings, why are you doing it in an ATI 1800xt thread? We have memory forums. Please do move the converstation.

UnG

Sorry m8, i just wanted to interject some input and try an educate the masses.

guys let this thread get back on topic.

**perkam** · 10-10-2005, 11:46 AM

Info coming on the Memory capabilities of the DFI Crossfire CF-DR board and much more.

Perkam

**~~freecableguy~~** · 10-10-2005, 12:41 PM

Mmmmm....ok....

**Tim** · 10-10-2005, 12:43 PM

?! what's this?

**[XC] moddolicous** · 10-10-2005, 12:47 PM

I got all excited, then I see this?!?!

**charlie** · 10-10-2005, 12:47 PM

Tease!!

**HiJon89** · 10-10-2005, 12:53 PM

Does that mean 4x1GB 1T also?

**J-Mag** · 10-10-2005, 12:55 PM

I thought this was a a64 memory controller limitation...

**RyderOCZ** · 10-10-2005, 12:56 PM

Originally Posted by HiJon89

Does that mean 4x1GB 1T also?

Oh come on Jon....board can't make this happen....AMD has too

HAHAHAHAA

**MonkSP** · 10-10-2005, 01:00 PM

LOL everyone came to see this. You have to face the blackboard Perham and wite 100 times.

" I will not tease my fellow clockers ever again "

**HiJon89** · 10-10-2005, 01:01 PM

Originally Posted by RyderOCZ

Oh come on Jon....board can't make this happen....AMD has too

HAHAHAHAA

That's what everyone said about 4x512MB 1T

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