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Old 04-11-05, 12:14 PM   #1
mortenbo
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Default GV-N68128DH, poor performance?

Hi,

I have this passively cooled Geforce 6800 GPU from GigaByte. Running glxgears with it gives me about 8000 FPS. Isn't this rather low for such a card? I have seen reports that suggest that I ought to get around 14000 FPS. I am using 2.6.11 with the latest 7174 driver from Nvidia.

~$ cat /proc/driver/nvidia/agp/status
Status: Enabled
Driver: AGPGART
AGP Rate: 8x
Fast Writes: Disabled
SBA: Enabled

I have also placed the line

Option "RenderAccel" "true"

in my xorg.conf, but it does not seem to make a difference.

What are the rest of you getting with this card or similar cards? If 8000 FPS is okay, please let me know, so I don't feel that I am missing out on anything, which is terrible you know

Morten
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Old 04-11-05, 12:31 PM   #2
erek
 
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Default Re: GV-N68128DH, poor performance?

try using Option "NvAgp" "1" (NVIDIA's Internal AGPGART)
__________________
[b]Linux localhost 2.6.11 #3 Sat Mar 19 14:50:03 EST 2005 i686 AMD Athlon(tm) 64 Processor 3000+ AuthenticAMD GNU/Linux[/b][center]
[color=blue]EPoX 9NDA3+ Socket 939 nForce 3 Ultra[/color][b] * [/b][color=blue]2x 512MB Mushkin Dual Basic PC3200 (@ CAS 2.0-3-3-6 1T)[/color][b] * [/b][color=blue]"BFG" GeForce 6800 GT "OC" (@OEM 370/1000)[/color][b] * [/b][color=blue]LSI Logic Ultra 160 SCSI-3 Single Channel 64-Bit Controller[/color][b] * [/b][color=blue]Creative Labs Soundblaster Audigy[/color][b] * [/b][color=blue]Intel Pro 100 S Desktop adapter[/color][b] * [/b][color=blue]Seagate Cheetah 15k.3 18GiB 15K RPM Ultra 320[/color][b] * [/b][color=blue]Seagate Cheetah X15 36LP 18GiB 15K RPM Ultra 160[/color][b] * [/b][color=blue]Samsung Spinpoint 40GiB 5400 RPM ATA100[/color][b] * [/b][color=blue]Samsung 48X ATA33 CD-ROM.[/color][/center][indent]
[b]Kernel[/b]: Vanilla [url="http://frozenarctic.com/erek/SERENA.txt"][u]2.6.11[/u][/url].
[b]Settings[/b]: 4kB stacks, regparm, pre-emptive, deadline i/o scheduler, fast writes on, sideband addressing on.
[b]Video/Sound drivers[/b]: NVIDIA x86-1.0-7174 / ALSA 1.0.9_rc3[/indent]
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Old 04-11-05, 01:20 PM   #3
mortenbo
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Default Re: GV-N68128DH, poor performance?

Quote:
Originally Posted by erek
try using Option "NvAgp" "1" (NVIDIA's Internal AGPGART)
I did, but now AGP fails to initialize. I get this error message in dmesg:

NVRM: not using NVAGP, an AGPGART backend is loaded!

Does this really mean that I have to remove the agpgart option(s) from my kernel configuration and recompile the kernel, or is there an easier way out?

Morten
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Old 04-11-05, 01:32 PM   #4
erek
 
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Default Re: GV-N68128DH, poor performance?

oh umm, remove agpgart support from your kernel entirely... i'm not sure if recompiling with it as a module will work with the internal agpgart.. but perhaps... try without being compiled entirely first though..
__________________
[b]Linux localhost 2.6.11 #3 Sat Mar 19 14:50:03 EST 2005 i686 AMD Athlon(tm) 64 Processor 3000+ AuthenticAMD GNU/Linux[/b][center]
[color=blue]EPoX 9NDA3+ Socket 939 nForce 3 Ultra[/color][b] * [/b][color=blue]2x 512MB Mushkin Dual Basic PC3200 (@ CAS 2.0-3-3-6 1T)[/color][b] * [/b][color=blue]"BFG" GeForce 6800 GT "OC" (@OEM 370/1000)[/color][b] * [/b][color=blue]LSI Logic Ultra 160 SCSI-3 Single Channel 64-Bit Controller[/color][b] * [/b][color=blue]Creative Labs Soundblaster Audigy[/color][b] * [/b][color=blue]Intel Pro 100 S Desktop adapter[/color][b] * [/b][color=blue]Seagate Cheetah 15k.3 18GiB 15K RPM Ultra 320[/color][b] * [/b][color=blue]Seagate Cheetah X15 36LP 18GiB 15K RPM Ultra 160[/color][b] * [/b][color=blue]Samsung Spinpoint 40GiB 5400 RPM ATA100[/color][b] * [/b][color=blue]Samsung 48X ATA33 CD-ROM.[/color][/center][indent]
[b]Kernel[/b]: Vanilla [url="http://frozenarctic.com/erek/SERENA.txt"][u]2.6.11[/u][/url].
[b]Settings[/b]: 4kB stacks, regparm, pre-emptive, deadline i/o scheduler, fast writes on, sideband addressing on.
[b]Video/Sound drivers[/b]: NVIDIA x86-1.0-7174 / ALSA 1.0.9_rc3[/indent]
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Old 04-13-05, 09:05 AM   #5
l_bratch
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Default Re: GV-N68128DH, poor performance?

mortenbo, I get 12000FPS with an overclocked MSI 6800.

CPU: 3.4GHz P4
Distro: Gentoo
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Old 04-14-05, 05:46 AM   #6
swsnyder
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Default Re: GV-N68128DH, poor performance?

You are using the current firmware, right? The original firmware had a bug which caused the card to only use 8 pipelines instead of the 12 it should be using.

http://www.giga-byte.com/VGA/Support...V-N68128DH.htm
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Old 04-14-05, 03:05 PM   #7
mortenbo
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Default Re: GV-N68128DH, poor performance?

Quote:
Originally Posted by swsnyder
You are using the current firmware, right? The original firmware had a bug which caused the card to only use 8 pipelines instead of the 12 it should be using.

http://www.giga-byte.com/VGA/Support...V-N68128DH.htm
Yes, I have flashed it to F3. Guess, I should have mentioned that.

Morten
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Old 04-14-05, 04:41 PM   #8
mortenbo
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Default Re: GV-N68128DH, poor performance?

Quote:
Originally Posted by erek
oh umm, remove agpgart support from your kernel entirely... i'm not sure if recompiling with it as a module will work with the internal agpgart.. but perhaps... try without being compiled entirely first though..
I had no luck with this. I still get the same error message. Googling a little seems to indicate that it might be a bug either in kernel 2.6.11 and possibly earlier versions or a bug in the nvidia driver. I can see, however, that you use 2.6.11 and 7174, so I don't know what to make of it. OTOH, I have read in another thread from one of the nvidia staff that there shouldn't be any significant difference between using the kernels agpgart and nvidia's. Perhaps someone can confirm this?

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Old 04-15-05, 01:22 AM   #9
strikeforce
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Default Re: GV-N68128DH, poor performance?

I've heard all different things agpgart is better and nvagp is better I'm not sure and I haven't read any definitive results. I'm going to recompile my kernel and see if that makes a difference because I've got a similar video card to you and I'm only getting between 9800 - 10000 fps in glxgears and with a bit of tweaking I had it at 14,000 fps but I can't remember what I have done
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Old 04-15-05, 08:06 AM   #10
mortenbo
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Default Re: GV-N68128DH, poor performance?

Quote:
Originally Posted by strikeforce
I've heard all different things agpgart is better and nvagp is better I'm not sure and I haven't read any definitive results. I'm going to recompile my kernel and see if that makes a difference because I've got a similar video card to you and I'm only getting between 9800 - 10000 fps in glxgears and with a bit of tweaking I had it at 14,000 fps but I can't remember what I have done
I'd be very interested in hearing what you find out. Another rather weird thing I just discovered is that if I run glxgears in my preferred windowmaker environment, then I get around 7.700. However if I shift to a pure KDE desktop (kubuntu), then I get 10.000! What on earth might explain this difference? The xorg.cfg/driver settings are otherwise the same, I just shift between KDE and windowmaker from my session manager.

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