Palit / XpertVision 7300GT DDR3 Voltmod

[sl4ck]

pls upload pics

[Fr3ak]

Can do that once I am at home, which might take until the weekend.
But as I said its not complicated. Massman uploaded great pics with the names of the chips. The two APW chips is where you solder a VR to pin 3 and pin 6.

[massman]

Oh, I did make some easy pics, but forgot to upload them

And as they are on my benching system, I won't be able to upload them until this weekend

[aycibin]

hello there..! i see that your pcb has the same design with my palit 7600gs sonic.besides i have 256mb ddr3 1.4ns ram modules.vgpu=1.15v & vmem=2.03v right now by default.in a different article(http://xtreview.com/review114.htm) i read that vmod can be applied by pencil method using the R37(for gpu) and R34(for mem) resistors o the front side.i find pencil method much more safer than soldering stuff.default values on the review are R37=833ohms & R34=665ohms.if i could find the way to remove the cooler i could write also my values anyway,the pcb on the review is different than ours.so the placement of these resistors are different.in our pcb R37 is on the left of gpu & R34 is on the right side of the ram which is on the right side of the card(what an explanation ).but i think it does no changes,right?

PS: everywhere it writes that its so easy to remove and install this cooling.but i am still not able to do it however,i had installed several times for 9600 and 9800(also vmoded successfully).how should i do with this ?

[mitsirfishi]

yes i would like to see a pencil mod for the memory aswell as the vgpu because my core clocks crap and just turns off my pc i dont know why when i got passed 580 will just reboot and cpu is 100% stable but the memory does go to 816 which im quiet happy with and managed around 15k on 03.

and aycibin i tryed the 7600gs r34 and r37 mod and had no affect on my palit 7300gt sonic Gddr3

[Fr3ak]

I have been told that you have to pencil R23 for VGPU and SR58 for Vmem, but I havent tested it yet, so I cant tell wether its working or not.
You can try it at your own risk.

Will finally come home tomorrow, so I can upload pics.

[2fink]

did the pencil-mod some minutes ago... working great right now @ 1,37V ...

pencil r23 for getting higher vgpu:

1,2V, 210ohm stock for me,
1,25V 200ohm
1,37V 185ohm

[mitsirfishi]

2fink i found where it says r23 on the front but no resister near it is it the 1 which is above the r23 is it the vertical 1 or the the horizontal 1 which is above the st chip it sats 183 on the rester is that the 1

or could you upload some picutes please ?

[2fink]

2fink i found where it says r23 on the front but no resister near it is it the 1 which is above the r23 is it the vertical 1 or the the horizontal 1 which is above the st chip it sats 183 on the rester is that the 1

or could you upload some picutes please ?

look here:



i marked the resistor

[mitsirfishi]

have you done the memory aswell and ive modded that

[2fink]

havent done it. spoke to fr3ak and he said it isnt worth it. the chips (1,8V stock) run @ 2V by default... so much more isnt good for them.

my overclock improved a lot by doing the voltmod + delta -100

before: 585/798
after : (over) 720 /789

[mitsirfishi]

have you got any scren shot of improvement in 3dmark 03 and 05 or css vst ?

[2fink]

no, dont have any shots atm. only tried 3dmark01 which scores wont improve much with the higher clock, because of the low cpu-clock....

will try some 03 now.

edit:

before mod @ 570/770: 12k
after mod @ 710/798, but with delta @ -100 (so performance is not much higher): 13.5k

[aycibin]

@mitsirfishi: ill try r37 pencil mod and write down here.i wish it worked for you

@2fink: how did you apply delta mod? actually i tried to mod from its bios using nibitor bios editor.but it didnt work.i couldnt give any - values

by the way,my default voltage for mems is 2v already.so i'm thinking to put some more volts on them.just waiting to get a new cooler before modding my mems now its working 540/740 without modding

[mitsirfishi]

aycibin do the r23 mod which 2fink kindly given i got from 580 to 700 plus core there for a happy chap i suppose i can go abit futher because my core 29c idel and 37 load with a zalman v900

[massman]

by the way,my default voltage for mems is 2v already.so i'm thinking to put some more volts on them.just waiting to get a new cooler before modding my mems now its working 540/740 without modding

The datasheets of the rams give us a maximum input of 2.5v. If you cool them enough, more volts shouldn't be a problem

[mitsirfishi]

mine did 580/800 stock so not that bad

[2fink]

@mitsirfishi: ill try r37 pencil mod and write down here.i wish it worked for you

@2fink: how did you apply delta mod? actually i tried to mod from its bios using nibitor bios editor.but it didnt work.i couldnt give any - values

by the way,my default voltage for mems is 2v already.so i'm thinking to put some more volts on them.just waiting to get a new cooler before modding my mems now its working 540/740 without modding

delta: use nibitor and write : 265 - delta (example: 265 - 100 = 156 <-- delta -100) in the box

@ massman: are you sure about the ram, could you give me a link to the datasheet?

[aycibin]

def value of delta is 0 in the box.is this equal to 256? so if i write directly 156in the box,this refers to -100 right ?

[2fink]

right... 156 = -100 delta!

[aycibin]

owowow....delta mod works!!! here i go 540/740 -> 595/740 (only delta and some mem timings settings changed)

since i'm still using the stock cooler,i didnt want to put much stress on it.the values of r37 &r34 were 35ohm & 800ohm so they seem to be useless too for me.you already said that in fact,r34 is copied next to each mem module,so it should not control mems at all.we need a different one for this.

i worked on r23 which was 440ohm by default.i decreased it to 406ohm.so 1.15v vgpu reached 1.25v and the new score is 665/740

after those changes,max heat with full load & o/c in 3dmark05 increased 56C to 60C degrees.i think it can go further as temp reads.but i dont want to go without new cooling and ramsinks(patience for one week ).do you have any ideas about mem vmod ?Fr3ak said SR58 but where is it?

PS: i realized that forceware(91.47 installed) is limiting o/c of 7600gs around 555(gpu).rivatuner and coolbits both failed in testing(before applying).i had to disable the testing in rivatuner.

[mitsirfishi]

whats with the delta thing i know there is a delta thing on the 7800gt where it overclocks the core by 40 or 50mhz on the core when going into game

[Rudyn]

Is this delta -100 mod works for 7600GS only or does it apply to any 7300GT also?

owowow....delta mod works!!! here i go 540/740 -> 595/740 (only delta and some mem timings settings changed)

[aycibin]

delta overclocked my core by 55mhz i know it also as a second clock generated by gpu.but also heard that manufacturers can put limits to cards with this.2fink also has a 7300gt i think.so he can answer this better

are you able to you find the mem vmod point,SR58 ?

[2fink]

delta-clock underclocks the geometric-part of the gpu which often limits the oc.

if you clock with your gpu-core with 500mhz (-100delta), your geometric-part is only running @ 400mhz, so you can normally clock the core higher until you reach the limit again.

to mod the delta, you can use nibitor. no hardware-mod needed, all by bios!