Fitting a Dell Precision 7750 RTX 5000 (110W) into a 7550

[JamieTheAnything]

Hi yall, long time no see, I managed to snag a 7550 lately for 100$. No ssd no ram, keyboard ripped out, however i already had the ram and a SSD, so the only thing i had to replace was thankfully the busted keyboard.

 

its an i9 configuration with the T2000 and the dci-P3 calibrated 1080p display which looks amazing. 
however since before I originally got it I’ve been rolling around the idea of upgrading it to the max spec GPU an RTX 5000 16GB. However between the 7750 and 7550 there’s two different sku’s for each, a 80(90)Watt “MaxQ” version that’s ment for the 7550, and a 110watt version ment for the 7750.

 

 

I just so happened to snag a cheap rtx 5000 on Friday and it’s the 7750 110W version. Based on overlaying images at various opacities it looks like I may need to trim a little bit of the palm rest in order to add extra cooling to the mosfets since it’s so much longer than a typical card they wouldn’t be in contact with the heatsink. 
 

 

if anyone has done this kind of swap before precision 17” GPU -> 15(16”)  please let me know if there’s any other potential incompatibilities I should be aware of like bios locks. But as far as I know the 7550 version (maxQ) also works in the 7750 and they both share the same bios there’s no reason as to why it wouldn’t recognize and boot with the 17” card. 
 

also to add I’m switching from the “P” heatsink over to the “E” style heat sink since said heatsink has a much bigger cutout(?) for the larger die of the rtx4000+ gpu’s. 
 

 

attached are some photos of the wonderful thing.

[JamieTheAnything]

Here’s what the listing photo looked like and the dude was asking 280+40 for shipping. I lowballed and gave him an offer for 100$ and I was actually surprised that he accepted it.

[JamieTheAnything]

Update: new Heatsink has arrived and has been modified 

[JamieTheAnything]

It fits and it works!!! Albeit it need more cooling now 😕

[JamieTheAnything]

So uhhh, developments

 

 

This card runs too damn hot and i think there is less than a MM gap between the heatsink and the GPU die. However!!!, I can fix this using the copper foil I was using for the mosfets.

Even with the MaxQ Vbios flashed onto the card and limited to 85W it was unable to keep the hotspot from creeping past 90 degrees. After that point it throttles down to 300-700Mhz, and makes certain games unplayable.