HIS 2900XT Crossfire got a CRAZY score in 3Dmark03-MotherNature

[VictorWang]

I still have problem for a complete bench of 01/03/06 when running CF.
but...part of the results are CRAZY enough...

and...a 2000w psu with 12v=80A+100A is needed for 2900XT CF Overclk with a 5.2Ghz+ C2D / 4.6Ghz+ C2Q.
my silverstone op1000w CANNOT handle 1.62v 4.7Ghz x6800 with 2900XT CF no-oc !!!

[Guz]

Which PSU would be able to handle crossfire overclock then??

[wedfighter]

i'm using dual PSU to test some XFire 2900XT setup
link here

[Kinc]

OMG that 03 score is sick. It shouldnt be possible

[NH|Delph1]

Nice results and congrats!

Are you really sure about the wattage though? I haven't heard about anyone having these kind of problems and 2KW is just not ... imaginable.

The measurements I've seen and experienced so far aren't that much worse than the G80, even though it really leaps of the charts when you start overclocking, but nonetheless 2KW is just ...

//Andreas

[Okda]

1000watt is not enough

OMG that is ultra-extreme

[VictorWang]

OMG that 03 score is sick. It shouldnt be possible

yes, I'm shocked.
it happened only ONCE.
normal score is arround 440frames.

[macci]

my silverstone op1000w CANNOT handle 1.62v 4.7Ghz x6800 with 2900XT CF no-oc !!!

Thats a poor PSU then... I have the Enermax 1kW running just fine at 4.93GHz (1.78V) + 2900XT CrossFire.
Actually all the 1kW PSUs I have tested have ran just fine with X2900 CrossFire. With one or two CPUs.

[VictorWang]

Thats a poor PSU then... I have the Enermax 1kW running just fine at 4.93GHz (1.78V) + 2900XT CrossFire.
Actually all the 1kW PSUs I have tested have ran just fine with X2900 CrossFire. With one or two CPUs.

i think maybe sst op1000w has big ripple noise, especially under load and higher ambient.

[gandalfone]

Congrats......But what's cooling for vga??

Can you oc in CF with amdgpuclock?? I can with one vga but when open secon fereez!!

So.....in the nature of 01 the fps is very very solow

Thanks

PS: i haven't problem to complete teh 3dmark in CF but the score is "normal"....like a gtx

[VictorWang]

perhaps it's single rail no?

yes, maybe, so i'm gonna buy a enermax dxx 1000w cf to test.

Congrats......But what's cooling for vga??

Can you oc in CF with amdgpuclock?? I can with one vga but when open secon fereez!!

So.....in the nature of 01 the fps is very very solow

Thanks

PS: i haven't problem to complete teh 3dmark in CF but the score is "normal"....like a gtx

with amdvct, i can see only 1device with cf enabled.
and tried overclk, but score = 1gpu score.
if no oc, core = cf score.

[gandalfone]

yes, maybe, so i'm gonna buy a enermax dxx 1000w cf to test.




with amdvct, i can see only 1device with cf enabled.
and tried overclk, but score = 1gpu score.
if no oc, core = cf score.

Thanks
I can see 2 device but i can oc one

[ineedaname]

from what i've seen so far it seems like the crossfire scores with the 2900's are really good compared 2 the single card scores.

[toddm27]

man, this thread has me worried now, hope my silverstone has enough juice to power my cards and a quad
very nice scores btw

[hausner]

Nice case VictorWang

[VictorWang]

i think silverstone op1000w is good only for cpu overclking , especially quadcore.
'coz it have rock stable 12v volt. under load, and 12v=12.45v.
there are lots of solid caps arround cpu, so ripple noise is not a big problem for cpu.
but for vga...maybe it's not good
i'd buy 2*vga power for vga card + sst op1000w for a xtreme overclking.


about Crossfire, yes, more efficiency than sli.
both 01/03/05/06 score(or part of) improve a lot compared with 8800gtx-SLI.

[SoF]

wow nice to see you already playin' with new cf setup victor
can only imagine what this will bring when a good and complete run is made

[gandalfone]

i think silverstone op1000w is good only for cpu overclking , especially quadcore.
'coz it have rock stable 12v volt. under load, and 12v=12.45v.
there are lots of solid caps arround cpu, so ripple noise is not a big problem for cpu.
but for vga...maybe it's not good
i'd buy 2*vga power for vga card + sst op1000w for a xtreme overclking.


about Crossfire, yes, more efficiency than sli.
both 01/03/05/06 score(or part of) improve a lot compared with 8800gtx-SLI.

The 3d01 don't work in CF....the score of nature in CF is like single

[gandalfone]

Yes in the nature to 3d03 and canyon to 3d05 the fps are better than 8800ultra....mmm

[G H Z]

The 3d01 don't work in CF....the score of nature in CF is like single

You have to disable AI, or did you do that already

[gandalfone]

You have to disable AI, or did you do that already

Thanks, I'll try

[Fr3ak]

very nice Victor
The case looks damn nice aswell

As of right now, you can only OC one of the 2 video cards in crossfire, right?