DFI Crossfire Motherboard and 4x512MB 1T

**MonkSP** · 10-11-2005, 06:28 AM

Won't be better to have 2 Gb of 300 htt 1T? I will need to see some tests to make up my mind

**Vapor** · 10-11-2005, 07:24 AM

Alright Jason....just saw your offer for a free Mousepot for 4xDS in 1T, does that count for 2x512 + 2x1024 as well? I'm 90% sure I can get it to work again, maybe even at >DDR400 speeds this time, I'll try right now.

BTW, all my hardware and BIOS versions is retail/publicly available.

**Vapor** · 10-11-2005, 07:52 AM

Alright Jason, I can't even boot at 190....no bother in booting lower and working my way up cause it won't work. You win....until we get some new BIOSs to play with though (which is what I really care about, I'd take DDR400 2.5-2-2-x 1T over DDR500/550 3-3-3-0 2T any day).

**largon** · 10-11-2005, 08:50 AM

Command rate is a latency the memory itself doesn't "experience". Command rate affects things that take place before any signals are sent to the dimm-to-be-accessed.

In short, Command rate value is the amount of cycles that within the memory controller (mc) is supposed to decode a rank address in the whole of memory space for a bit to be accessed.

I don't see why achieving DDR400 1T with 8 ranks would be impossible.

Because of the nature of command rate as a latency, ability of a mc to run 1T with high speeds and large memory spaces (8 ranks) cannot be considerably improved. By saying "considerably" I mean sqeezing much more than, say DDR400 1T. I believe no board can be certified to do 1T DDR400 with 4xDS, in majority of cases memory controller forms the limiting factor.

It could be done by tweaking the routes between cpu and memory banks - and maybe some bios optimizations. I gather this is exactly what DFI is doing to their Expert board and the upcoming bios'.

This would naturally REQUIRE a good proc too.
How good is another question.

**MonkSP** · 10-11-2005, 08:55 AM

I think my 315 htt stable Venice will do that that job, Largon. Will Expert do DDR600 @ 1T using 4 slots?

**largon** · 10-11-2005, 09:16 AM

MonkSP,
No way DFI Expert board would do that.

This new design only gives a slight bump. It won't make memory controllers somehow magically to be able to do 1T and 4x DS at higher frequencys.

It only inhibits the mobo-related problems.

**Vandread** · 10-12-2005, 03:03 PM

Give us a hint... is the 1t 4x512 on the CF or the NF4 board?
And which board exactly?

plz

**GordonFreemanLP** · 10-13-2005, 02:05 AM

Originally Posted by Sampsa

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

Here in italy 218 €uros

**gundamit** · 10-13-2005, 02:39 AM

Originally Posted by MickeyMouse

I have put up a Free Mousepot to see ddr400+ at 1t with 4x512 or 4x1024 this working on a retial board with a reg non paid user "OEM or REP" and they get one of my new pots.

This challenge is thread worthy. Maybe you can flesh out the rules, post it as a thread and the mods can give it temporary sticky status until someone claims the prize.

**Vapor** · 10-13-2005, 02:40 AM

That's still better than what us Americans can get--we'd have to pay THAT and then International shipping

The good news is that it looks like it'll be in etail VERY soon internationally--likely at around $220/€220/160quid, though.

**Vapor** · 10-13-2005, 02:42 AM

Originally Posted by gundamit

This challenge is thread worthy. Maybe you can flesh out the rules, post it as a thread and the mods can give it temporary sticky status until someone claims the prize.

It's possible too

If he's willing to keep his word someone will walk away with a free Mousepot (that someone will need 4 similar DIMMs though--2x1024 + 2x512 like I tried won't break 190).

**rsGTS** · 10-13-2005, 02:43 AM

This info looks very promising, it is even making me kinda glad they delayed so long, cause my system is going to be a beast now with all the extra cash I saved up! Makes me wonder if I should get 512x4 of OCZ VX4000 instead of 1024x2 of OCZ Plat PC4000 EB. Guess it depends on how high I see people getting with 512x4, cause I need at least 230 or so for that to be worth it for me.

**Vapor** · 10-13-2005, 02:50 AM

rsGTS....you won't get 230 2-2-2 1T stable with 4x512, sorry. I'd go with the Mushkin PC4000 sticks that should be out very soon--if you're looking to purchase more immediately, get the OCZ 2x1024 PC4000EB.

**rsGTS** · 10-13-2005, 03:16 AM

It will definately not be immediate, after all the damn MB I want still isn't out!

Actually I am not that pissed about, being a patient man.

Guess I will go with the 1024x2 OCZ, or we can see what Mushkin has in store for us, cause by all odds it will be out before the rest of the parts I need will be.

**ZeroX** · 10-13-2005, 04:46 AM

Has this board any advantage VS DFI nf4 in OC terms? The 4V jumper can be used to raise the voltge like the Dfi nf4?

**Vapor** · 10-13-2005, 04:47 AM

Better voltage stability supposedly....probably better memory performance at the same settings as well. There's also more room between PCIe slots for some better cooling

**Gogar** · 10-13-2005, 05:33 AM

Originally Posted by Tony

If you all want to try for 4dimms 1T try 200fsb with ram in 183 mode and push up slow.

That's not combined with the 9x multiplier, is it? edit: correction i meant 11x

11x multi with 183 ram results in a higher integer memory divider than expected.

I hope this isn't what allows it to work at 1T...

**AACDIRECT** · 10-14-2005, 06:24 AM

Very little waiting left on the DFI RDX!! I received my retail sample about 30min ago.

Mu guess is that the Egg will have them real soon. (Damn egg gets stuff before me.

I expect "for sale" product" next week. If anyone is interested in the board I will check on my final cost and see if I can hook you guys up.

)

I plan on testing with 4 512MB TCCD @ 1T as soon as I get an OS on it.

Here are some pictures. The layout is sweet.

Now if only I had a X1800 CF board.....

**babyelf** · 10-14-2005, 06:38 AM

it's already preloaded with the 1T bios?

nice looking board btw

**AACDIRECT** · 10-14-2005, 06:43 AM

Originally Posted by babyelf

it's already preloaded with the 1T bios?

nice looking board btw

Just got it. I have not asked DFI which bios it has on it. Going to

on that as soon as they open up.

I hope this board fullfills all my expectations......

**Brock911** · 10-14-2005, 11:19 AM

Originally Posted by AACDIRECT

Very little waiting left on the DFI RDX!! I received my retail sample about 30min ago.

Mu guess is that the Egg will have them real soon. (Damn egg gets stuff before me.

I expect "for sale" product" next week. If anyone is interested in the board I will check on my final cost and see if I can hook you guys up.

)

I plan on testing with 4 512MB TCCD @ 1T as soon as I get an OS on it.

Here are some pictures. The layout is sweet.

Now if only I had a X1800 CF board.....

I would LOVE A DFI CF-DR!!! Hook me up!!!

**Master_G** · 10-14-2005, 03:07 PM

FFS can DFI stop spreading those damn MOSFETs around the board, makes it so much more effort to cool the lot decently, ATI can get them into one place, why cant DFI? (end rant)

G