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ASUS M4A89GTD PCIe Switch card

post #1 of 9
Thread Starter 
Hi all,
I am running the above MoBo, and i need to have a switch card in the upper PCIe slot to achieve x16 on the bottom slot. I have tried my 5770 without the switch card in place and it only runs at x8. If i want to crossfire my 5770 in the future, will they be running in x8?

Also, is there a big difference if my single card is running on PCIe x8 or x16? if not im going to move my card to the upper slot for better airflow.
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post #2 of 9
Well, from what I've read in the past, it won't make a huge difference, prob not on the 5770 anyway.
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post #3 of 9
Thread Starter 
So ive found that apperently the 890GX chipset only has a 1x16 or 2x8 PCI lane. Ill try moving my card around this weekend and do some benchmarks to compare them.
with the Card on 1x16 i got ~19000 3DMark06 and P2992 3DMark11

I think its odd that ASUS made only the bottom slot capable of x16. In my case (HAF922) at least it makes more sense to use the upper slot. Right now the fan on my 5770 is about 30% covered by my Wireless card which is less that 1/4" away from each other..
Edited by CHez - 4/1/11 at 4:55am
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post #4 of 9
I agree, but the thing that pisses me off the most with this MB, is you can't run physx with it. So no ati/nvidia bundle for me
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post #5 of 9
Thread Starter 
Maybe thats why it didnt work when i tried to run my 8400GS. Thought the card was dead. Oh well.

Whats the reasoning why it wont work on this board?
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post #6 of 9
Honestly, i'm not 100 percent, but I've browsed the forums for people with the board, and searched the web, also saw a phone convo with a tech someone had. All of this confirming one thing, no one has been able to get a Ati/nvidia combo to work. I tried it with my 6970/gtx 260, and it was a no go. Which figures.... I mean we prob have the only board on the market (newer) that won't work with this combo
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post #7 of 9
Your will be fine. Tests shows that 5770 has a little bottleneck in a x4 slot.
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post #8 of 9
Thread Starter 
Well thats good news for the upper PCI slot... bad news for ATI/Physx

Going to make the switch now and do some benchmarks
Post back soon...
Edited by CHez - 4/1/11 at 2:07pm
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HAL 9000
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CPUMotherboardGraphicsRAM
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post #9 of 9
Thread Starter 
Good News Everyone!!!

After running 3Dmark06 again with my 5770 in the top slot, im within 99.7% of my last score... so there is no difference there.

The difference for me is the temps. Now my 200mm Side Intake fan is blowing directly on the fins of the cooler. FurMark full load temps dropped 2-3C
HAL 9000
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CPUMotherboardGraphicsRAM
Phenom II X6 1055T Asus M4A89GTD PRO/USB3 XFX/Sapph HD5770 Crossfire 8GB 
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Crucial C300 64GB, WD Black 1TB 22" + 23" Ultra 750W Cool Master HAF 922 
  hide details  
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HAL 9000
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CPUMotherboardGraphicsRAM
Phenom II X6 1055T Asus M4A89GTD PRO/USB3 XFX/Sapph HD5770 Crossfire 8GB 
Hard DriveMonitorPowerCase
Crucial C300 64GB, WD Black 1TB 22" + 23" Ultra 750W Cool Master HAF 922 
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