MSI 7900GTO Vmem mod

Quote:

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Originally Posted by SF3D

Original value is only 25ohm. So it is hard to do vmod with 20Kohm vr. I have tryed it and I can tell you it was hard. First nothing happens and then suddenly your voltage raise a lot.

I suggest that you buy 200-500ohm vr and do Vgpu mod with it.

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Thank you sire. I tried myself,thats why i asked :) ....its hard yes.
Think ill just buy a few 200ohm also......

Thanks alot :toast:

That bios is excellent Alexandrus, can run 700/1680 stock volts + cooler :D

I edited it to 650/800, 650/800, 600/800 though with 50 delta and just going to run those speeds for now :)

Thanks. But imho it's pointless to set the 2D closk that high and throttle clock like 3D clocks, if the card enters throttle it is definitely be fubar with those clocks, and once you see the throttle in action, it's definitely something wrong with the cooling, so I don't imagine anyone wanting to play a game in that situation.
Anyway, enjoy the BIOS and as soon as I manage to do some improvements I'll post the new version.
Until then, for all of those who asked, here's the BIOS again.

Quote:

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Originally Posted by Alexandrus

Thanks. But imho it's pointless to set the 2D closk that high and throttle clock like 3D clocks, if the card enters throttle it is definitely be fubar with those clocks, and once you see the throttle in action, it's definitely something wrong with the cooling, so I don't imagine anyone wanting to play a game in that situation.
Anyway, enjoy the BIOS and as soon as I manage to do some improvements I'll post the new version.
Until then, for all of those who asked, here's the BIOS again.

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Actually, I see noticeable improvements in playing videos/movies/HD with high 2D clocks and less cpu usage when decoding with purevideo etc

Very strange, for me everything plays perfectly with the lowest 2D clocks.

Yeh but it's when multitasking that I notice

I have videos playing constantly on my computer (seriously) even when I'm working in ms office etc so I notice jumps and stuff sometimes when opening apps and raising 2D clocks sorts that out. and finally, I get my 2nd 19" tft in 7 days :D which will just play videos lol

Question guys? I have a EVGA 7900GTO that clocks to 695/1.52GHz mem. I can get it higher (mem @ 785) but it starts to artifact. Would you think I should try this "testbios" out and see if it can help out? thanks

Since you do not seem to know much about the card, I wouldn't flash the bios.

Ok guys I need some help.
I got my card running 720/880 and no artifacts in 3dmark 01-06.
Problem is i noticed sometimes my card makes that high pitched noise, usually when switching from 2d to 3d.
Its not very loud and I'm sure I won't hear it when I put everything into a case but anyways.
This happens whether i overclock the card or not.
Well basically is this gonna be a big problem?
should i get it rma'd?

All GTX, GTO and GT cards I've seen do that. Maybe some do not, but I don't know, I've seen quite a few and they all did that. Not a big problem.

My 7800GT did it too, nothing to worry about :)

Somebody want a killer bios for your GTO card ?
I got one with timings even tighter than the stock GTO bios.
Got one with 20 delta for air setups and one with 0 delta for sub zero
The 0 delta one is the one that made aspstein hit 1000Mhz on his card under dry ice: http://www.xtremesystems.org/forums/...d.php?t=121357

Let me know if somebody want it...

Ill have a look at it hellrazor

Here is the bioses :)
-Can improve your max core clock by 20-30Mhz
-VERY tight mem timings with minior/none changes to your max mem clock
-Can help you get more stable 3dmark scores

This bios has the same voltage in 2d as in 3d, thats becouse sometimes the card is an little slow to turn on the 3d mode so you get bad scores in the first 3dmark test, i tryed to prevent that by setting the same 2d and 3d voltage so you can also set the same clocks in 2d as in 3d, then it wont matter if the 3d mode is slow to kick in becouse the clocks is the same...

Happy clocking :up:
Attachment 54335 For air
Attachment 54336 For Sub Zero

what subtimings did you change?

These----------------Orginal
tRC 27-----------------31
tRFC 34----------------39
tRAS 19----------------22
tRP 8-------------------9
tRCDRD 10--------------10
tRCDWR 6---------------6
tRRD 8-----------------10

have you tried tighten them up even more?

I know it can been done and im working on another bios with even tighter timings, I will release this bios as soon as im finished testing.

My MSI GTO does 800mhz mem stock but the core wont budge at all.
Do you think I would benefit from doing the pencil mod for the memory?
I'm no good at soldering but is there any other way to increase my core clock?

Thanks!

You can try to see if the bios i posted help you :up:

thanks for this :) will try it when my rig is back up and running. btw, what are the clocks on these bios?

Ok, a few words of advise here as i've been messing with my GTO today.

First of all, bios .09 defenately clocks a lot better than .15, most will ignore this but today i found out it actually is true, even though i was reluctant to flash cause i had a feeling i could not help, no way.

I was wrong, this bios helped mem overclock big time.

Second, do some finetuning on the mem voltage.
I got ~715 with stock voltage (.15 bios) ~730 @ 1.99V (.15 bios)
~820 @ 1.99V (.09 bios) ~835 @ 1.94V (.09 bios) and ~850 @ 1.91V (.09 bios)

Going lower than 1.91V lowered my overclock.

This finally helped me breaking 12K 05 which is one hell of a task with a single core AMD cpu, it took 3,2GHz to get there, card clocks 724/837 ( had 1.94 Vmem at the time)

Also took down 6K in 06. :D Man what a boring bench to watch. :gay:

^^ nice info there. i wish there was a bios volt-mod for the card :(. not too familiar with the pencil mods....

Nopro. ;)

Pencil mods are dead easy, just pencil the resistor and measure resistance, that's all.

Pumping this up. Nothing new here :)

(this way GTO owners doesn't have to start new thread everyday...search...what?)