MSI pci-e 6600gt v-mods

[Revage]

Hello!
I need msi 6600gt v-mods.
I tryed to do this mod , but i relized that my msi is diffrent
http://www.pctuning.cz/ilustrace2/Pi.../pics/Vmod.jpg
here is a front pic
http://images.people.overclockers.ru/39977.jpg

[Micutzu]

Put high-detail pics of the back of the card, and also tell me what's written on the IC i've circled.

[Revage]

Put high-detail pics of the back of the card, and also tell me what's written on the IC i've circled.

i didnt find any back pics .
but can anymody tell how can i turn macro on in canon powershot a95

[Revage]

please , can somebody can help me . i need those mods quick

[Revage]

Lm358
65m
C7c4g4

[Micutzu]

Lm358
65m
C7c4g4

That doesn't help, i need high-detail pics with front and back of the card.

[DesertShooter]

I've got some pictures:

[Micutzu]

What's written on these two IC's ?

[SikaRippa]

Hi,

Lm358 is an operational amplifier, maybe (?) not used for voltage generation.

Could you specify codes top of two larger IC's (~16 pins) in the foto below:




--
EDIT: Micutzu was faster , we were making the EXACTLY same question in the same time

[DesertShooter]

lower one:



Higher one:

[Micutzu]

Please take a multimeter and measure the voltage on the marked pins:



Be careful to not short-circuit them.

[DesertShooter]

[DesertShooter]

I Think that's vcore and vdimm, isn't it?

And now?

[SikaRippa]

I Think that's vcore and vdimm, isn't it?

And now?

Maybe I did not get what was the point , but those points are the 'phase' -nodes of the regulators. The chips are 'ISL6549, and 'N2101VG' AFAIK.

http://www.intersil.com/data/fn/fn9168.pdf

http://www.chip.tomsk.ru/chip%5Cchip...le/N2101VG.pdf

.. Niko-Sem's datasheet was not TOO easy to find

--

I suppose the output voltages of those regulators are adjusted by feedback nodes. Those are FB (pin #4) and VSENSE (pin #11) for 'ISL6549, and 'N2101VG', respectively. Take a look datasheets for orietation and details. By measuring those you should get voltages of ~0.8 V and 1.265 V ('ISL6549, and 'N2101VG). And by lowering resistance (with a high value varible resistor, say >50 kohms) between those nodes and GND the output voltages should be increased. Voltage measurement points should be located by tracing the largest (yellow) capacitors front side of the card (find good/safe points with multimeter while PC is OFF)

[DesertShooter]

Like this?

[Micutzu]

Measure the resistance between pins 7 and 11 of N2101VG and between pins 4 and 7 of ISL6549 and the attach a variable multiturn resistor with 10-20 times the measured value.

[SikaRippa]

Measure the resistance between pins 7 and 11 of N2101VG and between pins 4 and 7 of ISL6549 and the attach a variable multiturn resistor with 10-20 times the measured value.

Excatly in this manner, thanks for 'Micutzu' for drawing informative figures

--

Have you already find voltage reading points ? I wonder most of the large (yellow etc.) capacitors have leads throught the PCB and therefore give good points to measure. Some of points will have Vcore and Vmem (VDD/VDDQ) while rest have input voltages for regulators: 3.3 V, 5 V or 12 V.

[DesertShooter]

Vcore,

Going to solder the pot to it later.

[DesertShooter]

W00t, Vcore mod works, 1,55v

[Revage]

give us more pic´s of the vcore mod

[Raiden Zero]

hey guys, i was just searching for a vmod for my aopen 6600gt pcie when i found this thread.

my card got the same ic on the back like the msi does:

ISL6549CB

do you think i can vmod my card the same way? or should i masure voltage and resistance at the marked pins to be sure?


There are also 2 more chips on the back of the card:



already did some soldering work

what are the other 2 chips for? vddr maybe?