3 ms·
These are part of the chip, thus microscopic and very inaccessible. There are some good images here[1] of various such fuses, both pristine and blown. Here's[2
by magicalhippo 3y ago
These are part of the chip, thus microscopic and very inaccessible.
There are some good images here[1] of various such fuses, both pristine and blown. Here's[2] a more detailed writeup examining one type.
It's not something you fix with a soldering iron.
[1]: https://semiengineering.com/the-benefits-of-antifuse-otp/ https://semiengineering.com/the-benefits-of-antifuse-otp/
[2]: https://www.eetimes.com/a-look-at-metal-efuses/ https://www.eetimes.com/a-look-at-metal-efuses/
- metadat 3y agoI miss the days when you could do things like connecting the L5 bridges on the surface of the AMD Athlon XP Palomino [0] CPU packaging with a silver trace pen to transform them into fancier SMP multi-socket capable Athlon MPs, e.g. Barton [1]. https://arstechnica.com/civis/threads/how-did-you-unlock-your-palimino.709631/ https://arstechnica.com/civis/threads/how-did-you-unlock-you... Some folks even got this working with only a pencil, haha. Nowadays, silicon designers have found highly effective ways to close off these hacking avenues, with techniques, such as the microscopic, nearly invisible, and as parent post mentions, totally inaccessible e-fuses. [0] https://upload.wikimedia.org/wikipedia/commons/7/7c/KL_AMD_Athlon_XP_Palomino.jpg https://upload.wikimedia.org/wikipedia/commons/7/7c/KL_AMD_A... [1] https://en.wikichip.org/w/images/a/af/Atlhon_MP_%28.13_micron%3B_overview%29.png https://en.wikichip.org/w/images/a/af/Atlhon_MP_%28.13_micro...
- aceazzameen 3y agoI'm one of those folks that did it with a pencil. Haha. Maybe I was lucky? That was my first overclock and it ran pretty well.