Soldering GDDR5 vram in a DDR3 card

[Inkiad]

As the title says. Is it possible to solder GDDR5 memory chips in a DDR3 card? The card in question is my old Gigabyte GV-R775OC-2GI. Which is a 7750 card.
I know 7750 supports GDDR5. But is it possible to upgrade the vram myself? The card resides in my fathers pc and i thought it would be a fun project. Nonetheless i don't want to brick the card.

Also where does the memory controller reside in the 7750(cape verde)? If its in the die itself then i think theoretically its possible.

 

[hang-the-9]

No, not possible. You can't just "solder" the RAM, even if you could do a swap out of the memory chips directly, new RAM sits on a BGA array that connects under the chips, you can't reach that, and a soldering iron is abut 20 times larger than what you need to work with it.

 

[Inkiad]

I know i need a hot gun for this. And my friend can solder BGA chips who is studying bachelor in EEE. Question is will it work if i manage to swap the chip and then flash a new bios for the GDDR5 card?
I looked up the chip manufacturer, apparently they have another DDR3 chip which is pin compatible with mine, runs at 1000 Mhz compared to mines 800MHz. Looking for a GDDR5 chip.
Do all chips uses the same pin configuration?

 

[hang-the-9]

If your friend can change the chips, check with him. I'd say you have a 95% chance of just killing the card, maybe 99% depending on how good your friend is.

 

[Inkiad]

If chance of failure is that high, i will pass.
Still, has anyone done similar thing?

 

[hang-the-9]

If chance of failure is that high, i will pass.
Still, has anyone done similar thing?

I have never heard of anyone changing RAM on a card from one type to another. There may be people that were able to replace faulty RAM on the card themselves, but never did I run across someone going from DDR3 to DDR5.