G
Guest
Guest
Hi Gang,
So I upgraded my motherboard from a 890GPA-UD3H (v.1, BIOS F9) to a Asus Sabertooth 990FX. I noticed when I installed my 5850 Black Edition ( a PCIE x16 2.1 card) into slot 1 (a PCIE x16 2.0 slot) I am having a problem. It seems my graphics card is running at x8 rather than full x16. I tested the slot with a older PCIE x16 2.0 graphics card (a 8800GTS 512) and it runs at full speed. I am thinking the issue is because the slot itself isn't 2.1 it has to run at a slightly reduced speed.
Does this logic make sense? Also, I did do some research and looking around before asking, so please no one pop up with a "search is your friend" or hot-link to a similar thread. I don't want to necro or hijack anyone else.
It seems AMD used PCIE x16 2.1 and Nvidia has stuck with 2.0 (for now, I hear 3.0 is coming soon.) I know the difference for a single card between x8 an x16 is about 2% performance lost. And this really isn't a big deal. I just want to make sure I am on the right track. I should note that I tried to overclock the pcie bus to 102 MHz, since I read it might fix the issue. No luck. Wiped my Win 7 install thinking it might be old drivers causing a conflict, and no luck. Upgraded video drivers, nothing. So I think this has to be running at x8 due to it's design as a 2.1 card in a 2.0 slot. Otherwise, I am at a loss. Maybe AMD did this as part of the way they will run SLI. Who knows.
Thanks for your help!
So I upgraded my motherboard from a 890GPA-UD3H (v.1, BIOS F9) to a Asus Sabertooth 990FX. I noticed when I installed my 5850 Black Edition ( a PCIE x16 2.1 card) into slot 1 (a PCIE x16 2.0 slot) I am having a problem. It seems my graphics card is running at x8 rather than full x16. I tested the slot with a older PCIE x16 2.0 graphics card (a 8800GTS 512) and it runs at full speed. I am thinking the issue is because the slot itself isn't 2.1 it has to run at a slightly reduced speed.
Does this logic make sense? Also, I did do some research and looking around before asking, so please no one pop up with a "search is your friend" or hot-link to a similar thread. I don't want to necro or hijack anyone else.
It seems AMD used PCIE x16 2.1 and Nvidia has stuck with 2.0 (for now, I hear 3.0 is coming soon.) I know the difference for a single card between x8 an x16 is about 2% performance lost. And this really isn't a big deal. I just want to make sure I am on the right track. I should note that I tried to overclock the pcie bus to 102 MHz, since I read it might fix the issue. No luck. Wiped my Win 7 install thinking it might be old drivers causing a conflict, and no luck. Upgraded video drivers, nothing. So I think this has to be running at x8 due to it's design as a 2.1 card in a 2.0 slot. Otherwise, I am at a loss. Maybe AMD did this as part of the way they will run SLI. Who knows.
Thanks for your help!