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Terrible performance with C2D/P5K in Crossfire - Page 3

post #21 of 92
No problem

I just wanted to let you know that there is nothing wrong with your system
Blue Ruby
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Blue Ruby
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post #22 of 92
Thread Starter 
Well here is my 3dmark after some more OCing and a BIOS flash from today. Is it normal to get a bad checksum message and have to reset the CMOS settings after a BIOS flash? Makes sense...but not really sure about the checksum error.
Well at least I owned some people with Crossfired X1950 Pros...still doesn't make me feel better
I checked the CPU-Z link width section, and it only shows one of the PCI-E link widths. (16x of course)
PWNzershreck
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PWNzershreck
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post #23 of 92
You always always ALWAYS have to clear CMOS after a flash or you'll get a checksum error. Sometimes you get that error even if you DO clear CMOS and you have to manually set the timings again.
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Raptor Raper
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post #24 of 92
I see your score increased a little!
Im sure it will get above the 8400 very soon. This whas just by a bios flash
Your SM3 score decreased by 500 points with the new mobo so im shure drivers will fix that. Your old Mobo was a 16x16 right? Remember that this one is 16x4 eventough I doubt it that the 4 lane bottlenecks the second GPU. My x1950pro runs in a 4 lanes slot and I dont see differences with other users in terms of 3dmark scores.

The bad checksum error is normal after a bios flash. After the flash reboots and you get the error, reboot, go into the bios, reset defaults, reboot, set the bios up again. At least thats what I do
Blue Ruby
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Blue Ruby
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post #25 of 92
Thread Starter 
I got a higher SM 3.0 score, but I also OCed my CPU a little more. I'm not really sure if SM scores increase with CPU increases...
Yea you're right, I did have a board with 16X/16X. I see that the highest 3dmark score in my category has a ASUS P5W that operates on 8x/8x....so I should be able to beat that after some more drivers. I hope! Here's a screen of the comparison. His CPU is clocked higher too.

PWNzershreck
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PWNzershreck
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post #26 of 92
Not a lot. But they do in the same way a CPU OC helps your gaming framerates.
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Raptor Raper
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post #27 of 92
Thread Starter 
Interesting.....
Quote:
Our initial assumptions turned out to be incorrect. After working with ASUS we discovered in their internal testing they noticed the same issue, and they decided to see what would happen on the 975X if the MCH was programmed at x16/x4 operation between the two GPU slots instead of x8/x8. Their test results revealed a surprise as the difference in throughout in all areas of testing was less than 1%. The issue lies in the limited bandwidth and speed of the Direct Media Interface between the P35 MCH and ICH9R. The time required to simultaneously move the data between the two chipsets imposes a significant overhead and bandwidth issue in memory sensitive applications, hence our issues in the memory sensitive 3DMark01 benchmark. Of course, 3DMark performance doesn't necessarily have anything to do with actual game performance anyway, so these results are only mildly interesting.

While ASUS has optimized this link and will continue to do so, it appears we are now near the maximum efficiency of this interface. This simply means that as games become increasingly complex and data bandwidth increases then the differences between the P35 and 975X in CrossFire operation will widen. Let's see how this potential issue and driver maturity affects our initial gaming benchmarks. We would like to stress once again that synthetic benchmark
results do not necessarily correlate into real application results.
http://www.anandtech.com/video/showdoc.aspx?i=2990&p=3
PWNzershreck
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PWNzershreck
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post #28 of 92
Hi there binormalkilla, i have the exact same problem with my p5k. i'm experiencing really bad performance on this so called "upgrade" from my old amd 64 3000+ system.

when i got the board it had the stock 030* (something) bios, which had the C.G.I (crossfire option thing) in the bios. i upgraded to the latest 060* bios the other day and also noticed that the C.G.I option was missing.

anyways ive got 2 ati cards in the mobo, one x1900 crossfire edition (in the primary blue slot) and one x1900xtx (in the black pci-e 4x slot).

after a fresh install of windows xp and the latest 7.6 catalyst drivers i cant seem to enable crossfire. after clicking on the check box in the control center i get a popup message:

"CrossFire cannot be enabled because some 3D applications are running, or the interconnect cable is not connected, or the motherboard has no communication channels between PCI-Express slots"

and in the control center itself:

"Crossfire is currently unavailable. No communication channels can be establshed between the selected CrossFire capable cards. this may be a motherboard issue and may be resolved by choosing other slots for your CrossFire capable cards"

im pretty sure the dongle is installed correctly and ive done everything correct

to see the proof that it isnt working i had my 3dmark06 result from my msi board @ stock i recently tested here: http://service.futuremark.com/compare?3dm06=2335124

this one has a score of 8000+ but my p5k only does about 4000+ when overclocked to 3.5Ghz !

so my guess is that its either a driver or motherboard problem... i hope its the drivers cuz i really like the board!

regards

agent_paul
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My Current System
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E6300 Asus P5K vanilla X1900 CF + X1900XTX 2 Gigs of Geil 
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250 Gigs of i cant remember Some Samsung dvd rw Windows XP Samsung 20" widescreen 
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post #29 of 92
Oh i forgot to mention that i tried downgrading the bios but theres no way you can do so. EZ flasher, windows flasher and the dos based one wont let up flash to a bios with and older revision.

i tried this just to see if the C.G.I option will come back... so no chance.

mean while ive sent a message to ASUS about this so i should get a message back within 48 hours. so ill keep u guys posted

agent_paul
My Current System
(13 items)
 
  
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E6300 Asus P5K vanilla X1900 CF + X1900XTX 2 Gigs of Geil 
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250 Gigs of i cant remember Some Samsung dvd rw Windows XP Samsung 20" widescreen 
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generic Seasonic S12 600w Antec P180 MS rat 
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na 
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My Current System
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E6300 Asus P5K vanilla X1900 CF + X1900XTX 2 Gigs of Geil 
Hard DriveOptical DriveOSMonitor
250 Gigs of i cant remember Some Samsung dvd rw Windows XP Samsung 20" widescreen 
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post #30 of 92
Thread Starter 
I used to get that message when I was trying to run the 7.4 Warcats. I installed the latest drivers and it worked! I would get driver cleaner pro (if you don't alraedy have it) and run it in safe mode, then run a registry cleaner, then run it again.
PWNzershreck
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CPUMotherboardGraphicsRAM
4930K @ 4.6 GHz ASUS Rampage IV Black Edition MSI GTX 1080 FE Heatkiller Acetal 16 GB Corsair Vengeance 1600C9 
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2x Samsung 840 Pro  ASUS DVD-RW SATA Koolance 380i & 2x HW Labs 480GTX Arch Linux x86_64, Windows 7 x64 
MonitorKeyboardPowerCase
LG UC88-B Ultrawide, ASUS VS278Q Ducky Corsair AX1200i Caselabs STH10 
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Logitech G500 Func 1030 ASUS Xonar Essence STX 
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PWNzershreck
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CPUMotherboardGraphicsRAM
4930K @ 4.6 GHz ASUS Rampage IV Black Edition MSI GTX 1080 FE Heatkiller Acetal 16 GB Corsair Vengeance 1600C9 
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2x Samsung 840 Pro  ASUS DVD-RW SATA Koolance 380i & 2x HW Labs 480GTX Arch Linux x86_64, Windows 7 x64 
MonitorKeyboardPowerCase
LG UC88-B Ultrawide, ASUS VS278Q Ducky Corsair AX1200i Caselabs STH10 
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Logitech G500 Func 1030 ASUS Xonar Essence STX 
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