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AGP volts (7600 GT)

TomTomTom

TomTomTom

TomTomTom

Associate
Joined
6 Feb 2004
Posts
812
Hey,
Is 1.5 volts AGP enough for GeForce 7600GT? Because that's what I had set in my bios.

I've had a very ocassional issue of my RC sim (FS One) suddenly terminating (no error messages, nothing goes haywire, it just stops and I restart it). It happens rarely, but it seems to be associated with level of graphical detail (the setting level and how much the sim is showing at the time of the exit), but again most of the time it runs fine regardless of graphical detail.

Could it be that my 7600GT needs more volts? Should I try increasing AGP volts from 1.5 to 1.6 or something? Is it safe to try?

My mobo is Abit NF7-S v2 and CPU is mobile xp2500 (overclocked and stable otherwise). If it could be CPU related, was thinking of asking about that also in the appropriate section.

edit: Oh and my psu is Antec 380W.. plenty for the 7600GT.

Thanks
 
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AGP version of the 7600gt takes an extra power connector from the PSU. Have you plugged this in ?
 
mame said:
AGP version of the 7600gt takes an extra power connector from the PSU. Have you plugged this in ?
Click to expand...
Yep, that's plugged in and I selected a separate cable bundle for it (not a connector branching off from a in-use connector).

edit: Hmm... does it's use of the separate power make the AGP volts more or less irrelevant? Again, it's at 1.5 v now. Any other bios settings that come to mind that could be in the wrong or not ideal? My AGP aperture setting is at 256 MB (my ram is dual channel 512 MB).
 
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mame said:
Have you used the AGP frequency lock ?
Click to expand...

Ah I forgot about that setting. It's set at 66 Mhz (and the setting options are 66 to 99 Mhz). I don't remember what the reason was for that, but I remember that it's necessary to be able to OC the cpu at all. There's no "auto" setting. I would have to disable "user defined" fsb and multi settings I think.

My FSB is 230 and multi is 10 btw. RAM is running 1:1 with FSB as it's capable of 500 Mhz.

Thanks for help :)
 
On my Asus A8V and x1950 Pro, you can safely change from 1.5v to 1.6v but for me it makes no difference. It certainly shouldnt hurt to try, otherwise i seriously doubt the option would be available.
 
OzZie said:
On my Asus A8V and x1950 Pro, you can safely change from 1.5v to 1.6v but for me it makes no difference. It certainly shouldnt hurt to try, otherwise i seriously doubt the option would be available.
Click to expand...

Ok thanks. If nothing else ends up being the culprit, I could try that. Normally slightly more volts can mean more stability. But I wonder if that counts on a card that feeds right off the PSU (didn't consider that factor initially).

I dug up the other AGP related bios settings:

video ram cacheable: disabled
agp spread spectrum: disabled
agp transfer rate: auto
agp fast write: enabled

and again, agp frequency: 66 MHz (in fsb/multi menu)

I don't remember what the overall impact of all of these were as I set these so long ago. Don't know if there is anything significant or revelant in there to what I'm seeing (the sim exits).

Thanks :)

edit: Ok so if no one has an idea as to what GPU issue might be the culprit, then that's useful info too. I'm guessing then that the real problem may be with CPU-settings and/or RAM-timings. I have changed the RAM at one point way after OC'ing the system. And I never tested it for gaming performance before. Thanks for the input :)
 
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RaiderX said:
stock volts on AGP 4x and 8x cards is 1.5v, older AGP 1x and 2x cards used 3.3v
Click to expand...

Thanks for confirming that. It's one more thing I can rule out.

The problem I'm having with the RC sim random exits is not a huge problem, but it does get annoying. AND it shouldn't be happening. Card can handle the sim... the GPU doesn't heat up to more than 55-56 C during play (2 to 3 C above basline). The CPU is not being pushed very hard either by the sim.

Soon I'll figure this out.. maybe ram or something... :confused:

edit: I lowered the sky detail a bit (can't visually see the difference in the change) and it has not terminated once. For some reason the sky graphics was doing something wonky to the hardware.
 
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Interesting, I am getting similar issues with a 7600GS AGP.

If I increase graphical detail on games such as BF2, it will run fine for anything between 2 minutes and 2 hours, then locks up completely.

If I leave it alone, eventually I get a BSOD refering to NV4 Disp so I do think its card related!

If I put the same card in another machine, it behaves itself. :confused:

Tried increasing my voltage to 1.6v and the problem persists. :(
 
AGP cards are powered from the 12v rails.

The AGP 1.5v and 3.3v settings are SIGNALLING VOLTAGES.
Older cards 1x and 2x used the 3.3 v setting.
Newer 4x cards use 1.5v and 8x actually uses 0.8V.

Some bios's allow this signalling voltage to be increased slightly, can help when running the AGP over 66Mhz.
 
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