How to vmod this newbie? Galaxy 7300GT DDR3

[sabinus]

Thx man I shall try it tomorrow.
How much (Mhz) did you gain from the vMem mod ?

Full pencil mod here:

[over@locker886]

Thx man I shall try it tomorrow.
How much (Mhz) did you gain from the vMem mod ?

Almost nothing, but I don't know why.. only I hope gets +10Mhz. I think memory timingset is too agressive.

[sabinus]

Almost nothing, but I don't know why.. only I hope gets +10Mhz. I think memory timingset is too agressive.

Maybe it's not the right resistor for VMEM because the memory speed decreases when I pencil resistor 437 ...
Are you sure it's the right one?

[zoran555]

Hi! I have the Galaxy 7300GT 128mb ddr3 1.4ns PCI-E

Looking at the pics, I could not find anyone with the same PCB, so I'm kinda afraid to vmod it without some pro advice.
Here are the pics:
The area around the IC:


Big pics of the front and the back

As I have no multimeter here, I really would like to be sure before I do something.

[Lanc]

Hi! I have the Galaxy 7300GT 128mb ddr3 1.4ns PCI-E

Looking at the pics, I could not find anyone with the same PCB, so I'm kinda afraid to vmod it without some pro advice.
Here are the pics:
The area around the IC:
[/IMG]http://klesarstvo.com/vmods/galaxy-7300gt-128mb-ddr3-crop01.jpg[/IMG]

Big pics of the front and the back

As I have no multimeter here, I really would like to be sure before I do something.

This is the same PCB as you can see in the other photos. You must pencil r451.

At stock voltages I can get my 7300gt at 550/890. If I add voltage to the gpu I get 650MHz on 1.43V but then I can't get mem over 790 to be stable :?
I bumped the memory voltage a tad, but didn't seem to do anything.

We need VDDQ mod for this card. I think the VDDQ is to low to handle vgpu and vmem mod.
[quote]3. DO NOT volt-mod the memory with the above resistor 437 .. I think it does exactly the opposite: it decreases memory OC. Wipe any pencil trails from it with acetone or technic alcohol.[/quote]
It increase memory oc but only if you don't make vGPU mod. Becouse if you make boths mods card aren't stable.

[zoran555]

Almost nothing, but I don't know why.. only I hope gets +10Mhz. I think memory timingset is too agressive.

At stock voltages I can get my 7300gt at 550/890. If I add voltage to the gpu I get 650MHz on 1.43V but then I can't get mem over 790 to be stable :?
I bumped the memory voltage a tad, but didn't seem to do anything.

It shouldn't be the mem temperature, it seems like its something else :/

Anyway, here are some 3Dmark 05 scores I made while testingon a sempron64@2.5GHz:

gpu mem 05 marks
500 700 4148
500 750 4235
500 781 4254
500 800 4316
500 850 4356
550 700 4370
550 750 4476
550 781 4565
550 800 4560
550 820 4631
550 850 4641
561 801 4643
612 750 4831
631 700 4676
631 800 4941
648 783 4943
648 800 4998
653 792 5004

[zoran555]

Just tested it...
As soon as I add even a tad voltage to the gpu, mem frequency drops
The RivaTuner test just fails above 800MHz for mem :/
Tried dropping the cpu to 350MHz, but still the mem is stuck at 800....

The system is cold, just booted, and gpu temp is at 42 C.
So it's definitely not temperature related.
What else could it be?
Any ideas?

[sabinus]

1. Monitor temps with Rivatuner and Atitool in Artifact Tester at each frequency.
2. Provide air-flow on the card's memories. I do it by using a 70 mm fan over a ~55-60 mm GPU radiator (from an Arctic Silencer), thus providing good air on the memory chips.
3. DO NOT volt-mod the memory with the above resistor 437 .. I think it does exactly the opposite: it decreases memory OC. Wipe any pencil trails from it with acetone or technic alcohol.
Leave only the GPU mod. If the GPU OC starts to decrease, it's time to wipe-out the pencil and start over with it.

Good luck!

[zoran555]

1. Monitor temps with Rivatuner and Atitool in Artifact Tester at each frequency.
2. Provide air-flow on the card's memories. I do it by using a 70 mm fan over a ~55-60 mm GPU radiator (from an Arctic Silencer), thus providing good air on the memory chips.
3. DO NOT volt-mod the memory with the above resistor 437 .. I think it does exactly the opposite: it decreases memory OC. Wipe any pencil trails from it with acetone or technic alcohol.
Leave only the GPU mod. If the GPU OC starts to decrease, it's time to wipe-out the pencil and start over with it.

Good luck!

I monitor the temps all the time, and have added ramsinks on the memmory chips. Also there is a 120mm fan blowing directly on the card. For testing purposes I also added a 90mm 5500rpm fan (the one from a volcano 12, damn, is it loud) but didn't affect the mem clock. The chips were cool to the touch.

As soon as I add volts to the gpu I loose like 100MHz of max mem clock. :/

I tried the r437 pencil mod, and while the mem voltage did go up (from 1.95 to 2.05) I didn't do a thing.

So for now I settled on 580/750 (vgpu raised a bit) for stock cooling...

But I'd really like to hear more about this mem thing...