ASUS 2900XT Crossfire overclocking

Kinc

This is just the beginning with stock cooled cards doing 880/980MHz.

Test 2 of the SM2.0 tests is limited by graphics perf. The fps walled above 4.2GHz. I did a test with 920/980MHz (not stable threw all tests in 3dmark 06) and saw a fps increase in the beginning with 8 fps wich is alot. Canyon flight saw a good fps increase from more system perf. and PCI-E bandwidth. Remeber this is 880MHz core and R600 is good for atleast 1150MHz in crossfire using ln2 or cascades. I ran Canyon Flight in 3Dmark 05 at these speeds and got 215 fps wich is really good for the cpu clock. Total score were ~29500 in 05. It is really nice to see CF boosting GT2 rather then slowing it down Smile

http://service.futuremark.com/compare?3dm06=2117278

Delph1 · Posted: Sun Jun 03, 2007 6:56 am Post subject:

Excellent! Smile

//Andreas
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Kinc · Posted: Sun Jun 03, 2007 7:49 am Post subject:

To give you an idea how well crossfire scales with cpu power. This is even higher then Ultra SLI overclocked on ln2 using a 5GHz cpu.

Kinc · Posted: Sun Jun 03, 2007 11:22 am Post subject:

Light grey: 2900XT Crossfire stock air cooled with 4450MHz Kentsfield.
Dark grey: 8800GTX SLI stock air cooled pre 158.22 with 4500MHz Kentsfield.

_________________
Shamino & Kinc - Unleashing the power of ASUS Ultra SLI and Crossfire this summer at Games Convention with Mushkin!
Sampsa, crotale & Kinc - X38 overclocking at Intel with ASUS!
K|ngp|n & Kinc - ATI vs. NVIDIA showdown in China sep. 15!
crotale & Kinc - Dreamhack Winter 2007, G92 or 2xRV670 (R670)?

magicman · Posted: Sun Jun 03, 2007 1:02 pm Post subject:

KTE · Member Joined: 04 May 2007 Posts: 393

Well, 6 months of driver optimization and the G80 still gets beaten. That's something very good for AMD already indeed. Just only in synthetic benches. Sad

Looking sehr gut Marcus! Wink

Kinc · Posted: Sun Jun 03, 2007 4:23 pm Post subject:

If there is anything that should sell 2900XT today except the redicilous price it is Crossfire. Crossfire offers an extreme boost in performence compared to the competiotions multi-gpu solution. It scales very well already on the old 975 core logic with 8+8 PCI-E buses. Still we know that 8+8 is a bottleneck for 2900XT Crossfire, especially if you use discrete graphics cards to play games (I dont know who would do that Wink

).

Were I'm getting at is that 2900XT lacks a review with Crossfire included, stock and overclocked. If there is time I promise you to include this in our upcoming review of the R600 with mature drivers and crossfire.

KTE · Member Joined: 04 May 2007 Posts: 393

Mean Machine · Posted: Sun Jun 03, 2007 11:25 pm Post subject:

Well, screw this... Makes me want another one, but I really can't justify the cost. Smile

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nemetron · Member Joined: 16 May 2007 Posts: 1 Location: Calgary

any possibility you could bench your overclocked system with vista? -> new drivers support crossfire in vista if I'm correct?

Kinc · Posted: Wed Jun 06, 2007 12:18 am Post subject:

Droop moded the board wich let me run 100MHz more cpu (note again the cascade is only holding -65C during cpu test thats why the clock is so low). Cards at same clocks as before. The air is 8C warmer then before.

_________________
Shamino & Kinc - Unleashing the power of ASUS Ultra SLI and Crossfire this summer at Games Convention with Mushkin!
Sampsa, crotale & Kinc - X38 overclocking at Intel with ASUS!
K|ngp|n & Kinc - ATI vs. NVIDIA showdown in China sep. 15!
crotale & Kinc - Dreamhack Winter 2007, G92 or 2xRV670 (R670)?

Kinc · Posted: Wed Jun 06, 2007 2:49 am Post subject:

Slight increase on the cards.

http://service.futuremark.com/compare?3dm06=2142764

_________________
Shamino & Kinc - Unleashing the power of ASUS Ultra SLI and Crossfire this summer at Games Convention with Mushkin!
Sampsa, crotale & Kinc - X38 overclocking at Intel with ASUS!
K|ngp|n & Kinc - ATI vs. NVIDIA showdown in China sep. 15!
crotale & Kinc - Dreamhack Winter 2007, G92 or 2xRV670 (R670)?

Delph1 · Posted: Wed Jun 06, 2007 6:49 am Post subject:

This is going to be soooo mean under LN2 Very Happy

//Andreas
_________________
"I'm sort of a postmodern vegetarian, I eat meat ironically"

"You are our Swedish superhero Wink

"

Mean Machine · Posted: Wed Jun 06, 2007 9:26 pm Post subject:

Let me... Gah! I want another one and a decent crossfire mobo.
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Tjalve · Posted: Thu Jun 07, 2007 8:19 am Post subject:

meany. You go get another card so we can run Crossfire. Would be nice to test it on RD600 and P35.

By the way. I got my SB600 SATA controller to work again Smile

Mean Machine · Posted: Thu Jun 07, 2007 8:44 pm Post subject:

The P35 is nothing to even consider for Crossfire, since it's 16/4x PCI-E lanes as I told you. The RD600 isn't exactly sunshine all the way either, so I'll be waiting for X38 or make someone send me a 975X card when I'm finished with my current business (which will be in time for P45 or something). Smile

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magicman · Posted: Fri Jun 08, 2007 2:14 pm Post subject:

I've got a 975X board, but it'd be cheaper if you sent the video cards to me. Very Happy

Mean Machine · Posted: Sat Jun 09, 2007 1:07 pm Post subject:

You'd like that, huh? Razz

Feels like it's cheaper to get hold of a 975X board right here in Sweden.
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magicman · Posted: Sun Jun 10, 2007 12:00 am Post subject:

Can't blame a guy for tryin Wink

Delph1 · Posted: Sun Jun 10, 2007 6:44 am Post subject:

Actually, ASUS has a P35 with 8+8 coming, thanks to Crosslinx.

//Andreas
_________________
"I'm sort of a postmodern vegetarian, I eat meat ironically"

"You are our Swedish superhero Wink

"

2900XTX · Member Joined: 11 Jun 2007 Posts: 16 Location: ISTANBUL

@kinc Thank You your score super good 2x hd2900xtx ln2 overclock test pls, 3d2006 26k warranty:)
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super dank · Posted: Fri Jun 15, 2007 1:27 am Post subject:

Nice Results
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Delph1 · Posted: Sun Jul 22, 2007 12:54 pm Post subject:

miamimuscleboy · Member Joined: 04 Oct 2007 Posts: 4

Can you please tell me what you use to over clcock the crossfire cards , I have tried everything to get both to work but the second card stays at 500 unless i use ati tool and it tells me the wrong clocks, i can only get 15600 on 3dmark06 , im on an e6750 @ 3.6 448FSB 850 silvestone psu also is 3dmark the only thing crossfire will run with out CORRUPTION IN GAMES AND bad DX10 performance or am i doing something wrong,
msi p35 neo2fr MB 16x 4x pci express please tell me how i can overclcock both cards in vista 32
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E6750 @3.5 , msi p35 neo2 FR 16x/4x 2 hd2900xt crossfire silverstone 750 strider 4gb ddr2 1068 , vista 32 proof that crossfire does work in 3dmark06 but forget about most dx10games its horrible ! Found out how to overclock 2nd card in VISTA Xfire with atitool ! will post 3dmark6 scores regular CF and CF overclock 1000 to 1200 point diffrence when ocing 2nd card