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#1
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SLI Issues with 7800GTX long
Hi there,
I have a Tyan K8WE system with dual opterons, and I've been running a single 7800GTX now for about a month with no problems. Just recently I had won another 7800GTX (same brand/model) and decided to try out SLI. The installation was easy enough, I plugged in the other card, attached the bridge connector on top of the cards and booted into Windows. The card was detected, I rebooted, it said that an SLI configuration was detected and asked me if I wanted to enable, which I did. This is where things started going wrong. First I ran dxdiag, just to test out very basic Direct3d (to make sure nothing was wrong), and that worked fine, so I moved on to running some of the opengl Nvidia demos, and again no issues here. Then I ran 3dmark2005, and this was running fine through the first test (the first game, with the shooting), when it got to the 2nd game, it loaded, then just sat there at a blank screen for a few mins, eventually exiting with some Direct3d error. So I closed 3dmark, and tried running another direct3d game (HalfLife2), and it wouldn't even run, so I tried dxdiag again, and it exits the 3d tests with errors saying it could not create a display. At this point I'm starting to think that there might be something wrong with the new card, so I try running one of the nvidia demos (opengl) and they work perfectly fine, so I decide to reboot so that hopefully that might fix the issue. After rebooting back into windows, something weird starts happening, the display goes blank every 3-4secs and my mouse stops working intermitently, looking at the task manager I can see the CPU is under full use right before the screen goes blank. I left this for about 5 mins thinking the driver was setting stuff up but it kept going on, so I decided to reboot again. This time after rebooting, after the windows XP booting screen, the screen just went blank and I saw nothing, and it never recovered, and successive reboots after this didn't fix the issue. I eventually booted in VGA mode, and after rebooting this seems to have disabled SLI and I'm able to use the comp as before with no issues. I've tried using both cards singularly and there doesn't appear to be a problem with either card, so my question is, is this simply a driver issue, or are there things with SLI that are still flaky, or is there something else here that I'm missing? For reference, here's my setup: Tyan K8WE 2x AMD Opteron 252 2x 1GB Corsair ECC DDR 400 2x EVGA 7800 GTX 600 watt Enermax PSU Windows XP SP2 Nvidia driver v81.85 A quick check of the 'System Information' in windows shows that both of the 7800GTX cards are sharing the same IRQ. Thanks for your time, Derek R. |
#2
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SLI Issues with 7800GTX long
"Derek R." wrote in message news:4G2cf.447236$tl2.402624@pd7tw3no... A quick check of the 'System Information' in windows shows that both of the 7800GTX cards are sharing the same IRQ. Not good. Each card should have their own IRQ. You may want to sort that first and see if the problem vanishes. |
#3
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SLI Issues with 7800GTX long
Zandig wrote:
"Derek R." wrote in message news:4G2cf.447236$tl2.402624@pd7tw3no... A quick check of the 'System Information' in windows shows that both of the 7800GTX cards are sharing the same IRQ. Not good. Each card should have their own IRQ. You may want to sort that first and see if the problem vanishes. You wouldn't per chance happen to know how to force different IRQs with ACPI would you? It doesn't appear as if my BIOS allows me to specify specific IRQs for slots, and through some searching it appears as if this is the case for ACPI systems. Derek R. |
#4
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SLI Issues with 7800GTX long
based on the Tyan web site, this motherboard may not be SLi
compliant, you may want to contact Tyan to double check. Derek R. wrote: Zandig wrote: "Derek R." wrote in message news:4G2cf.447236$tl2.402624@pd7tw3no... A quick check of the 'System Information' in windows shows that both of the 7800GTX cards are sharing the same IRQ. Not good. Each card should have their own IRQ. You may want to sort that first and see if the problem vanishes. You wouldn't per chance happen to know how to force different IRQs with ACPI would you? It doesn't appear as if my BIOS allows me to specify specific IRQs for slots, and through some searching it appears as if this is the case for ACPI systems. Derek R. |
#5
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SLI Issues with 7800GTX long
Sorry, I should have mentioned that it's a Thunder K8WE, not a Tiger K8WE.
According to http://www.tyan.com/products/html/thunderk8we.html this should support SLI (although the evga cards I have are not on the 'certified' list). Derek R. farmuse wrote: based on the Tyan web site, this motherboard may not be SLi compliant, you may want to contact Tyan to double check. Derek R. wrote: Zandig wrote: "Derek R." wrote in message news:4G2cf.447236$tl2.402624@pd7tw3no... A quick check of the 'System Information' in windows shows that both of the 7800GTX cards are sharing the same IRQ. Not good. Each card should have their own IRQ. You may want to sort that first and see if the problem vanishes. You wouldn't per chance happen to know how to force different IRQs with ACPI would you? It doesn't appear as if my BIOS allows me to specify specific IRQs for slots, and through some searching it appears as if this is the case for ACPI systems. Derek R. |
#6
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SLI Issues with 7800GTX long
Derek R. wrote:
Sorry, I should have mentioned that it's a Thunder K8WE, not a Tiger K8WE. According to http://www.tyan.com/products/html/thunderk8we.html this should support SLI (although the evga cards I have are not on the 'certified' list). Derek R. farmuse wrote: based on the Tyan web site, this motherboard may not be SLi compliant, you may want to contact Tyan to double check. Derek R. wrote: Zandig wrote: "Derek R." wrote in message news:4G2cf.447236$tl2.402624@pd7tw3no... A quick check of the 'System Information' in windows shows that both of the 7800GTX cards are sharing the same IRQ. Not good. Each card should have their own IRQ. You may want to sort that first and see if the problem vanishes. You wouldn't per chance happen to know how to force different IRQs with ACPI would you? It doesn't appear as if my BIOS allows me to specify specific IRQs for slots, and through some searching it appears as if this is the case for ACPI systems. Derek R. I would be tempted to install one card, upgrade the BIOS, and do a clean install with newest motherboard chipset drivers and maybe even use the driver from the video card cd rather than the newest from nVidia, sometimes they goof with new stuff, and you want something that is known to work with SLi. But I would do the clean install so windows can sort the IRQ etc properly. Then chipset driver, then video driver, then DX9. Make sure your BIOS is set up right, nothing crazy. Check the manual carefully for hints about BIOS settings. Check some forums for tips also, like hardocp and pcper. Someone may know exactly what you are going through. If Tyan says SLi then it should work. |
#7
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SLI Issues with 7800GTX long
"Derek R." wrote in message
news:4G2cf.447236$tl2.402624@pd7tw3no... I have a Tyan K8WE system with dual opterons, and I've been running a single 7800GTX now for about a month with no problems. Just recently I had won another 7800GTX (same brand/model) and decided to try out SLI. The installation was easy enough, I plugged in the other card, attached the bridge connector on top of the cards and booted into Windows. The card was detected, I rebooted, it said that an SLI configuration was detected and asked me if I wanted to enable, which I did. Have you tried uninstalling the nVidia drivers and reinstalling? Some systems are flaky and require drivers to be installed in the presence of both cards. I'm assuming you also have the latest AMD 8131 northbridge chipset drivers? They can be downloaded he ftp://ftp.tyan.com/chipset_AMD/8131_PCI-X/ BTW, the 81.85 drivers were created especially for improved SLI compatibility, so it is unlikely to be at fault. A quick check of the 'System Information' in windows shows that both of the 7800GTX cards are sharing the same IRQ. IRQ sharing shouldn't be a problem at all, especially with modern PCIe cards. -- "War is the continuation of politics by other means. It can therefore be said that politics is war without bloodshed while war is politics with bloodshed." |
#8
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SLI Issues with 7800GTX long
First of One wrote:
"Derek R." wrote in message news:4G2cf.447236$tl2.402624@pd7tw3no... I have a Tyan K8WE system with dual opterons, and I've been running a single 7800GTX now for about a month with no problems. Just recently I had won another 7800GTX (same brand/model) and decided to try out SLI. The installation was easy enough, I plugged in the other card, attached the bridge connector on top of the cards and booted into Windows. The card was detected, I rebooted, it said that an SLI configuration was detected and asked me if I wanted to enable, which I did. Have you tried uninstalling the nVidia drivers and reinstalling? Some systems are flaky and require drivers to be installed in the presence of both cards. I'm assuming you also have the latest AMD 8131 northbridge chipset drivers? They can be downloaded he ftp://ftp.tyan.com/chipset_AMD/8131_PCI-X/ BTW, the 81.85 drivers were created especially for improved SLI compatibility, so it is unlikely to be at fault. A quick check of the 'System Information' in windows shows that both of the 7800GTX cards are sharing the same IRQ. IRQ sharing shouldn't be a problem at all, especially with modern PCIe cards. I've tried re-installing the display driver (various versions as well) about a dozen times to no avail. I've updated those AMD 8131 drivers, but they don't seem to be helping. One thing I've noticed when installing the cards (fresh drivers), is that the first card installs fine, but the second one always has the error "This device cannot start", and won't work until the system is rebooted. Not exactly sure what this is about, but perhaps it's a clue as to what the issue might be, I'm not sure. As for the sharing the IRQ, I can't see how them sharing could be a good thing, in fact there's also a SATA controller, and a NIC using the same IRQ. There's at least 4 IRQs free so there's really no reason why these devices *need* to be sharing them, unfortunately for me in an ACPI system these IRQs cannot be changed manually. I've e-mailed Tyan to see if they have any information on the issue, hopefully they might have seen this issue before and would be able to direct me towards a fix. Thanks for the tips though, a few more things crossed off the list for possibilities. Derek R. |
#9
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SLI Issues with 7800GTX long
farmuse wrote:
Derek R. wrote: Sorry, I should have mentioned that it's a Thunder K8WE, not a Tiger K8WE. According to http://www.tyan.com/products/html/thunderk8we.html this should support SLI (although the evga cards I have are not on the 'certified' list). Derek R. farmuse wrote: based on the Tyan web site, this motherboard may not be SLi compliant, you may want to contact Tyan to double check. Derek R. wrote: Zandig wrote: "Derek R." wrote in message news:4G2cf.447236$tl2.402624@pd7tw3no... A quick check of the 'System Information' in windows shows that both of the 7800GTX cards are sharing the same IRQ. Not good. Each card should have their own IRQ. You may want to sort that first and see if the problem vanishes. You wouldn't per chance happen to know how to force different IRQs with ACPI would you? It doesn't appear as if my BIOS allows me to specify specific IRQs for slots, and through some searching it appears as if this is the case for ACPI systems. Derek R. I would be tempted to install one card, upgrade the BIOS, and do a clean install with newest motherboard chipset drivers and maybe even use the driver from the video card cd rather than the newest from nVidia, sometimes they goof with new stuff, and you want something that is known to work with SLi. But I would do the clean install so windows can sort the IRQ etc properly. Then chipset driver, then video driver, then DX9. Make sure your BIOS is set up right, nothing crazy. Check the manual carefully for hints about BIOS settings. Check some forums for tips also, like hardocp and pcper. Someone may know exactly what you are going through. If Tyan says SLi then it should work. Well I've contacted Tyan, so maybe they'll have an idea or two, if not I might just have to go with the Windows re-installation route. Derek R. |
#10
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SLI Issues with 7800GTX long
Hey Derek -
This is off-topic. I see you have the motherboard I'm about to buy. Is there anything you can tell me about that motherboard that will help? Any advice? Are you happy with it? Where did you buy it? How long ago? Price? Happy with that vendor? Which Opterons are you running on it? -- Scotter "Derek R." wrote in message news:4G2cf.447236$tl2.402624@pd7tw3no... Hi there, I have a Tyan K8WE system with dual opterons, and I've been running a single 7800GTX now for about a month with no problems. Just recently I had won another 7800GTX (same brand/model) and decided to try out SLI. The installation was easy enough, I plugged in the other card, attached the bridge connector on top of the cards and booted into Windows. The card was detected, I rebooted, it said that an SLI configuration was detected and asked me if I wanted to enable, which I did. This is where things started going wrong. First I ran dxdiag, just to test out very basic Direct3d (to make sure nothing was wrong), and that worked fine, so I moved on to running some of the opengl Nvidia demos, and again no issues here. Then I ran 3dmark2005, and this was running fine through the first test (the first game, with the shooting), when it got to the 2nd game, it loaded, then just sat there at a blank screen for a few mins, eventually exiting with some Direct3d error. So I closed 3dmark, and tried running another direct3d game (HalfLife2), and it wouldn't even run, so I tried dxdiag again, and it exits the 3d tests with errors saying it could not create a display. At this point I'm starting to think that there might be something wrong with the new card, so I try running one of the nvidia demos (opengl) and they work perfectly fine, so I decide to reboot so that hopefully that might fix the issue. After rebooting back into windows, something weird starts happening, the display goes blank every 3-4secs and my mouse stops working intermitently, looking at the task manager I can see the CPU is under full use right before the screen goes blank. I left this for about 5 mins thinking the driver was setting stuff up but it kept going on, so I decided to reboot again. This time after rebooting, after the windows XP booting screen, the screen just went blank and I saw nothing, and it never recovered, and successive reboots after this didn't fix the issue. I eventually booted in VGA mode, and after rebooting this seems to have disabled SLI and I'm able to use the comp as before with no issues. I've tried using both cards singularly and there doesn't appear to be a problem with either card, so my question is, is this simply a driver issue, or are there things with SLI that are still flaky, or is there something else here that I'm missing? For reference, here's my setup: Tyan K8WE 2x AMD Opteron 252 2x 1GB Corsair ECC DDR 400 2x EVGA 7800 GTX 600 watt Enermax PSU Windows XP SP2 Nvidia driver v81.85 A quick check of the 'System Information' in windows shows that both of the 7800GTX cards are sharing the same IRQ. Thanks for your time, Derek R. |
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