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622
July 27th, 2023 07:00
Precision 3620 will not work after cpu upgrade, help.
I have up graded from a xeon 3.60ghz to a i7-7700k.
When turned on the fans buzz just a little, then stop.
The bios is very old, should I have updated it, or do you think the problem is something else?
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mazzinia_
4 Operator
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1.4K Posts
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July 29th, 2023 08:00
The question is if there's more than one heathsink and if so, if the one now present is the one associated with the higher wattage cpus. Otherwise you will have to change it ( maybe not immediately but ... )
Chino de Oro
9 Legend
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July 27th, 2023 08:00
When upgrading processors, a BIOS firmware update will certainly helped. But depending on the shipped date, BIOS firmware with supported microcode may already applied. You can try to reset CMOS via jumper to see if new processor can be recognized. Note that there is no overclocking option for K processor.
bradthetechnut
7 Technologist
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9K Posts
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July 27th, 2023 17:00
May need to reinstall previous CPU and update BIOS. Then reinstall i7-7700k.
Make sure no pins are bent. Also make sure old thermal paste didn't inadvertently get between CPU and socket. It happened to me and I luckily had the impulse to double-check things before turning on.
Doc_Fingers
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July 28th, 2023 04:00
Thank you for your help.
I have replaced the original cpu, monitor worked ok, reset CMOS now I have no video out put from my graphics card, on board HDMI or DP.
When it re booted, it seemed to go through a diagnostics set up but I can't see it.
I'm leaving it on for a few hours to see if it will turn the video back on after it's diagnostics.
This is going from bad to worse
mazzinia_
4 Operator
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1.4K Posts
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July 28th, 2023 08:00
Try without the gpu.
Also, is the ram normal or ecc ? because if ecc, it will not let a normal cpu boot while the xeon will boot
Doc_Fingers
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July 28th, 2023 09:00
Removed gpu, memory but nothing. Removed the button cel and re set cmos, nothing - then a bit later sprang into life. Had to do battle with the bios set up all over again. Forgot about raid setting, and legacy / uefi, all sata cables in the wrong holes but it's back.
Memory not ecc, bios=1.2.4 anyone know if this old bios is ok with a i7-7700k ?
Thank you for your help.
mazzinia_
4 Operator
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July 28th, 2023 09:00
probably the bios is a bit old , they moved to version 2.x since 2017
bradthetechnut
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July 28th, 2023 17:00
Latest BIOS for the 3620 is 2.25.0. Dell recommends not jumping too many BIOS versions at once, but do about every other until caught up. The part I don't like about that though is 2.10.2 gave speedstep (former Rockstar on this forum) trouble. I can't remember if he was able to do BIOS recovery, but I think he got it going again.
I just found a Dell article. Skip 2.10.2 if it lets you. Precision Towers 3420 & 3620: System hanging at the Dell Splash Screen or failing to POST
Doc_Fingers
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July 29th, 2023 07:00
All bios up dated, 2.10.2 seems to be no longer available.
Cpu changed for i7-7700k
One of those tense moments when the monitor doesn't light up, then the fans stop, and start again, then the little green led on the monitor puts a smile on my face. All done.
One question before I go, the cpu is 4.2ghz, it take it that it can achieve it's turbo speed of 4.5ghz?
Thank you for your help.
Chino de Oro
9 Legend
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8.1K Posts
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July 29th, 2023 08:00
Yes, the turbo boost will kick in when the condition required. You can test it by running a task like Windows Security full scan to trigger full CPU load. At the same time, opening Task Manager and monitoring CPU in Performance tab.
Glad that you have a successful upgrade.
bradthetechnut
7 Technologist
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9K Posts
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July 29th, 2023 11:00
There's 3 heatsinks available for the 3620. A little pancake model for 65w CPU's. Then a bigger pancake for 80w PSU's Then a nice big one with copper with the fan in the middle of it for 91w CPU's.. - Dell Precision Workstation Tower 3620 Cooling Heatsink Fan 0VWMTJ VWMTJ i7-7700k is 91w.
Doc_Fingers
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July 31st, 2023 03:00
I have a water cooler that I can use, but getting the radiator higher than the cpu is a problem in most tower units. Some thing else to do battle with ha' ha'.
Thank you all.
bradthetechnut
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July 31st, 2023 10:00
It makes me wonder if the radiator, with its fans of course, can somehow be attached to the case fan. Or move the case fan if possible.
Doc_Fingers
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August 2nd, 2023 05:00
Oh dear, no, it isn't going to fit.
My radiator is full of air, so that needs to be fixed before use anyway.
On Youtube some guys did a comparison between air and water cooled, and air cooled came out on top. A very good point was what if the water pump stops working?
https://www.youtube.com/watch?v=hr0qLLv3dKc
https://www.youtube.com/watch?v=23vjWtUpItk
Well that makes life a little easier lol.
bradthetechnut
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August 2nd, 2023 13:00
Just a reminder - Be sure to go with a heatsink that can handle 91w CPU, like the one I linked above.