Sounds kind of like the voltage regulator for Vcore is defective ..?

H3nrik V! wrote:

Sounds kind of like the voltage regulator for Vcore is defective ..?

You are probably right.
A closer inspection revealed this lil' bugger:

Sure looks like its had a hot moment, or several.

Anyone know how I would go about measuring this ?

bofh.fromhell wrote:

You are probably right. A closer inspection revealed this lil' bugger: […]
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H3nrik V! wrote:

Sounds kind of like the voltage regulator for Vcore is defective ..?

You are probably right.
A closer inspection revealed this lil' bugger:

Sure looks like its had a hot moment, or several.

Anyone know how I would go about measuring this ?

Beautiful, they actually made the effort to write what IC it is in the silk screen. Data sheet here
https://www.analog.com/en/products/lt1084.html would probably be the regulator it self, or one of the resistors. Is Vcore BIOS adjustable or through jumpers?

H3nrik V! wrote:

bofh.fromhell wrote:

You are probably right. A closer inspection revealed this lil' bugger: […]
Show full quote

H3nrik V! wrote:

Sounds kind of like the voltage regulator for Vcore is defective ..?

You are probably right.
A closer inspection revealed this lil' bugger:

Sure looks like its had a hot moment, or several.

Anyone know how I would go about measuring this ?

Beautiful, they actually made the effort to write what IC it is in the silk screen. Data sheet here
https://www.analog.com/en/products/lt1084.html would probably be the regulator it self, or one of the resistors. Is Vcore BIOS adjustable or through jumpers?

The TX97-X has 3 jumpers to adjust vcore, or 4 jumpers from rev 3.
TBH I'm lost when it comes to most components.
Tho my amateurish searches comes up with MOSFET parts (?).

A pic of the surrounding area.
Top left are the vcore jumpers, set to STD for single plane CPU's or 2.8v if a dual voltage CPU is installed.

Yeah, can't figure out, how the VID jumpers does their job, unless the Dual Plane CPUs have totally other pins for VCore, than the single planes did? I doubt it, though.

However, I think, I would as a first shot, try to see if I could get an LT1084 (as the silk screen on the board states) off from eBay in the right foot print, and change and see. Next step would be finding the resistors or maybe the transistors next to the jumpber block to see if they'd suffer damage. However, it doesn't seem so from the picture ..

RFD3055 LT1084 NDP603 are probably interchangeable in this design
mosfets usually go bad short, so buzz it out with a multimeter

Just make sure the mmx gets a good active cooler and it should work fine at 3.2v just like the non-mmx cpu's. If only the mmx doesn't boot it's probably the cpu that is dead (due to the regulator dying perhaps?)

meljor wrote:

Just make sure the mmx gets a good active cooler and it should work fine at 3.2v just like the non-mmx cpu's. If only the mmx doesn't boot it's probably the cpu that is dead (due to the regulator dying perhaps?)

Any dual vultage CPU wont even post.
And as the jumpers are the same for a regular pentium and the MMX variants theres no confusion there.
And all my CPU's work, well they atleast they did =)

rasz_pl wrote:

RFD3055 LT1084 NDP603 are probably interchangeable in this design
mosfets usually go bad short, so buzz it out with a multimeter

Just did this.
Beeps however i measure it.
Ya sure it can be measured in place ?

Then again its no biggie putting a new one in.
If it fixes it, sweet.
And if not, well its kinda broken anyway =)

rasz_pl wrote:

RFD3055 LT1084 NDP603 are probably interchangeable in this design
mosfets usually go bad short, so buzz it out with a multimeter

Any chance this is compatible ?

In my mind it should be perfect since it looks the same, tho I realize this could release the smoke =)
I am utterly clueless when it comes to stuff like this.
No idea what stuff to check for.

bofh.fromhell wrote:

Beeps however i measure it.

blown

bofh.fromhell wrote:

Any chance this is compatible ? https://i.imgur.com/qN9LPaOm.jpg In my mind it should be perfect since it looks the same […]
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Any chance this is compatible ?

In my mind it should be perfect since it looks the same

its perfect .. if your CPU requires 5V 😀
yeah, you need a proper mosfet there

rasz_pl wrote:

blown […]
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bofh.fromhell wrote:

Beeps however i measure it.

blown

bofh.fromhell wrote:

Any chance this is compatible ? https://i.imgur.com/qN9LPaOm.jpg In my mind it should be perfect since it looks the same […]
Show full quote

Any chance this is compatible ?

In my mind it should be perfect since it looks the same

its perfect .. if your CPU requires 5V 😀
yeah, you need a proper mosfet there

Agreed - this is a 5V regulator.

WTF .. The silk screen says LT1084, but yeah, @rasz_pl is right, that IS an "FD3055" MOSFET in TO-252AA case, as per datasheet: http://www.mouser.com/ds/2/149/RFD3055SM-100347.pdf

bofh.fromhell wrote:

A pic of the surrounding area. Top left are the vcore jumpers, set to STD for single plane CPU's or 2.8v if a dual voltage CPU i […]
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A pic of the surrounding area.
Top left are the vcore jumpers, set to STD for single plane CPU's or 2.8v if a dual voltage CPU is installed.

Looked a little more at it after realizing the blown part was a MOSFET. Here, in the upper left corner (position U13) is the HIP6008, which is a "buck" switch-mode regulator, which is the part controlling the MOSFET, so yeah, sound very reasonable, that the MOSFET is blown as rasz_pl wrote.

Funny stuff: http://pdf.datasheetcatalog.com/datasheets/228/75664_DS.pdf The HIP6008 actually does all the jumper->voltage stuff 😀

H3nrik V! wrote:

Funny stuff: http://pdf.datasheetcatalog.com/datasheets/228/75664_DS.pdf The HIP6008 actually does all the jumper->voltage stuff 😀

Ty all =)
Now I just have to find a replacement nearby.

Sorry to nag, but would this one do ?:
https://www.elfa.se/sv/mosfet-50-14-48-dpak-f … ign=&track=true