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3066
November 21st, 2022 08:00
Inspiron 3847 CPU upgrade: Intel Core i7-4790 or 4790K?
Inspiron 3847
I'm looking to upgrade my son's gaming PC's CPU to an Intel Core i7-4790 or 4790K. I see on the 4790K documentation, to use the overclocking, the motherboard's chipset needs to be Z97. I don't think that's what I have...I assume it's H81. Also, it states I need to make a setting change in the BIOS.
The PC's specs are:
Dell Inspiron 3847 desktop PC tower
CPU: Intel Core i5-4460
Codename: Haswell-DT Refresh
Platform: Socket H3 (LGA1150)
Chipset: Intel H81 (Lynx Point)
BIOS date: 5/7/19
BIOS version: A11
PSU: EVGA BR 700 watt
Graphics Card: GTX 1650 SUPER
Would this PC be able to use the overclocking feature of the i7-4790K?
Thanks.
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redxps630
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14.6K Posts
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November 21st, 2022 18:00
Re: it states I need to make a setting change in the BIOS.
I do not think so. the i7-4790 should be plug n play. I had a similar 4770 in this model works fine when I swap it in to replace an i3. the downside of this pc is poor air flow. for some reason mine has a Dell wireless card that is excruciatingly slow so I just added a wifi usb dongle solves problem.
back to your son's upgrade, the cpu upgrade would not bring significant performance boost. the i5 sits at a sweet spot for gaming. get a faster gpu is almost always more bang for buck. no worries if the gpu is faster than 4th gen cpu because you can move it to a faster pc later on.
redxps630
9 Legend
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14.6K Posts
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January 4th, 2023 07:00
Yes it will. it has been done too.
redxps630
9 Legend
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14.6K Posts
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November 21st, 2022 09:00
No you cannot over clock -k cpu in 3847 precisely because the chipset does not support cpu oc. And the dell bios does not have this feature either (bios is written based on chipset capabilities anyway).
4790k doses have a higher 4.0ghz base frequency than 4790. otoh if it is used it might have been overclocked a lot (aka abused under high voltage/temp) thus potential shorter lifespan.
RoHe
10 Elder
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45.2K Posts
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November 21st, 2022 11:00
@imadeller32 You didn't mention how much RAM is installed. Would adding more RAM be an easier way to improve PC performance?
Is it worth putting money into a PC that uses 4th Gen CPUs, when Intel is already up to 13th Gen CPUs?
imadeller32
5 Posts
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November 21st, 2022 12:00
It has 16GB RAM installed and a 1TB SSD that's the boot/primary drive.
I know it can be a money pit...just trying to see what the technical constraints are before deciding if it's worth it.
toyotatanks
2 Posts
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January 4th, 2023 06:00
the pc will still support the 4790k right?
toyotatanks
2 Posts
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January 4th, 2023 08:00
Thanks, I just wanted to confirm that because I just bought a 4790k for the dell 3847 and wanted to make sure the CPU was compatible with the stock motherboard.
underjack
2 Posts
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November 21st, 2023 17:51
@toyotatanks
Short answer: it will most likely work, but watch out for the thermals. From personal experience, the i5-4460 runs just fine with the stock Intel cooler, which is comparable to the Dell cooler in my i5 equipped 3847. But the i7-4790k will struggle, even though Intel shipped the same model cooler with it if you bought one retail. I know...I did and I tried using it...the poor cooler struggled and screamed under any type of load and the CPU throttled hard.
I'm going to try my 4790k to see how it behaves...
underjack
2 Posts
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November 21st, 2023 17:55
@redxps630
My only question is what cooler did they use? I tried using the stock cooler that came with my OEM 4790k when upgrading my custom PC from a 4460 (independently from the 4460 powered 3847 we got from our neighbor), and it was quite sad. Made me wonder why Intel even bothered putting that cooler in the box.
The Dell cpu cooler seems similar on first glance to the Retail Intel Cooler...is it actually more capable than the Intel pinner cooler, or did the build you referenced use a 3rd party cooler? (That's a thing UserBenchmark.com doesn't track...)
(edited)
redxps630
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14.6K Posts
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November 21st, 2023 18:04
I am not sure what stock cooler you used but the 3847 uses a Dell M3 backplate which requires a M3 screw mounted cooler, which is pretty much almost all of of the Dell LGA115* coolers. Of note the 3847 default cooler is mainstream low height pancake 65w. I suggest swap to performance grade cooler used in XPS 8700 or Optiplex 7010 that has a taller heatsink 95W. I have had two 3847 stock i3 cpu both having the low height cooler. I missed a 3847 i7 free pc and I wonder if that one uses the tall performance cooler.