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Dell Optiplex Gx620 sff Heatsink help

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  • Optiplex
  • Heatsinks
  • Dell
  • Components
Last response: in Components
November 3, 2013 1:01:24 AM

Can i use other btx form factor heatsinks on the dell optiplex gx620 sff? I'm thinking about buying one because my original one just doesn't perform after upgrading to a pentium d 945.

More about : dell optiplex gx620 sff heatsink

November 3, 2013 1:26:09 AM

Ok so I did a little research and i have seem to have found three heatsinks for my pc, heatsink JP911, heatsink MR313, and heatsink D9416. the one i have is the D9416. all i need to know is which heatsink is meant for the pentium d...or which one is better at cooling?
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November 7, 2013 6:02:26 AM

I am on iPhone now, so I can not check easy you findings, so you need a completely copper version, generally there could be aluminum for weak CPUs and copper for stronger ones.
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November 7, 2013 6:54:54 AM

Hi bestoftheworst,

I've just checked our part list for you and the heatsink that was used with Optiplex GX620s that had Pentium D processors was MR313. Hope that helps!
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November 7, 2013 7:19:46 PM

Guys i am so mad so i install the mr313 heatsink and guess what IT DOESN'T TOUCH THE CPU. CAUSING MY COMPUTER TO SHUT DOWN. I tried refitting it and everything, same result, it barely touches the thermal paste.
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November 7, 2013 7:30:48 PM

Found the problem, the mount for the heatsink also was for my past heatsink, lifting up my heatsink a little so it would barely make contact with the cpu. wow.
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Best solution

November 8, 2013 4:37:08 AM

Hi bestoftheworst,

I'm very sorry, I misread the parts list and gave you an incorrect part number and for that I can only sincerely apologise. What I'd like to do is try and send you the correct part free of charge to make up for the incorrect information. I'll send you a private message to get your contact details and we can take it from there.

For reference in case anyone is looking for Optiplex GX620 SFF heatsinks, the normal heatsink for Conroe & Prescott CPUs is JP911 and the "performance" heatsink for Smithfield & Presler CPUs is UP048.

Once again, sorry for the incorrect information but hopefully we can make this up to you.
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January 26, 2014 2:25:35 PM

Another idea to try.... I was able to install a small profile (thin) fan on the back side of the heat sink (on my gx-620 SFF that I recently upgraded to a Pentium 945 D 3.4ghz). This seems to have done the trick for the extra cooling that was needed.

Funny thing is that it's a fan I pulled off an old AMD heat sink (it still has the AMD sticker on it). For power, I spliced into front fan's power leads (red and blank only- so that the fan runs all the time).

the system now has a low whistle, which is easy to get use to, but it beats having cooling issues... I did run a burn-in program for about 20 minutes. Although the system sounded like it wanted to take off (the front fan kicked in), it ran just fine !

This worked for me... Maybe it will work for you?

Good luck !
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January 30, 2014 11:04:11 PM

smilligan said:
Another idea to try.... I was able to install a small profile (thin) fan on the back side of the heat sink (on my gx-620 SFF that I recently upgraded to a Pentium 945 D 3.4ghz). This seems to have done the trick for the extra cooling that was needed.

Funny thing is that it's a fan I pulled off an old AMD heat sink (it still has the AMD sticker on it). For power, I spliced into front fan's power leads (red and blank only- so that the fan runs all the time).

the system now has a low whistle, which is easy to get use to, but it beats having cooling issues... I did run a burn-in program for about 20 minutes. Although the system sounded like it wanted to take off (the front fan kicked in), it ran just fine !

This worked for me... Maybe it will work for you?

Good luck !


CAn you make a picture and post it here - to show how you did it?
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January 31, 2014 11:23:58 AM

Kisianik said:
smilligan said:
Another idea to try.... I was able to install a small profile (thin) fan on the back side of the heat sink (on my gx-620 SFF that I recently upgraded to a Pentium 945 D 3.4ghz). This seems to have done the trick for the extra cooling that was needed.

Funny thing is that it's a fan I pulled off an old AMD heat sink (it still has the AMD sticker on it). For power, I spliced into front fan's power leads (red and blank only- so that the fan runs all the time).

the system now has a low whistle, which is easy to get use to, but it beats having cooling issues... I did run a burn-in program for about 20 minutes. Although the system sounded like it wanted to take off (the front fan kicked in), it ran just fine !

This worked for me... Maybe it will work for you?

Good luck !


Can you make a picture and post it here - to show how you did it?



Sure- Also, the fan I used is a 60x60x10mm (Delta EFB0612HA, which was on an old AMD heat sink I had).

This one-> http://www.digikey.com/product-detail/en/EFB0612HA-F00/...

I only used 2 screws at the top to mount the fan. I installed it so that air is pulled ***thru*** the heat sink (make sure you mount the fan the right way). I know, the hot air ends up hitting the back of HDD, but so what- it's still not too hot so far. FYI- the front fan STILL cranks up when the system gets under a heavy load, but I have yet to have a thermal event since I installed the fan. The only drawback is that I have a little bit of a fan whining noise, but it's livable. For me this was a zero cost solution, since I already had the fan. I had no desire to buy a $30-$40 copper heat sink- regardless, I did not have any luck finding one that would fit.

Good luck- hopefully you'll have similar luck if you decide to try this approach.

The last picture shows where I spliced into the front fan connection (it's not east to see, sorry- but just into the black and red wires)








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