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Last reply by 05-19-2021 Unsolved
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33041

Dell Optiplex 990 CPU Upgrade

Hello! Just wondering if I can upgrade my Dell Optiplex 990 CPU from a i5 2400 to a i7 2600k. I saw many people saying that the i7 2600 is compatible but i want to know if the i7 2600k is compatible due to me wanting to possibly overclock in the future once i upgrade. Thanks a million to anyone who responds!

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30658

I didn't know you could overclock an optiplex. I have a 790 which is similar, and I don't see any bios setting to select clock for anything (cpu, gpu, memory, etc). How will you do it?

I also looked at using an i7 instead of the original i5 2400, but the gain wasn't enough to justify the money and effort on it.

You might want to consider buying a more powerful computer if the 990 won't fit your needs.

 

 

 

30765

The performance increase would be a mere 28% according to game-debate.

The same if you went with the I7 2600 non-K version, which is compatible.  The I7 2600k isn't compatible.

It's not stated what chassis size you have which lets us know what MB you have.  I'm going on the premise that there's a better than not chance that it's not a USFF.

Two ways to more significantly increase speed:  Have the OS on an SSD.  Increase RAM - as long as it's not already maxed.

Optiplex 990 Tech Guide 

s-l300.jpg

 




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30747

An Optiplex can't be overclocked.  It was primarily made for business, so it does have some power for gaming, but it's not an all out gaming machine.

If using a separate GPU card, what GPU do you have?




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30714

@bradthetechnut 

Just a few questions.

The i7-2600 has a 99% upgrade success rate!!!

The i7-2600K has a 97% upgrade success rate!!!

http://www.cpu-upgrade.com/CPUs/Intel/Core_i5/i5-2400.html

The "TDP" and "Stepping" are the same???

"The I7 2600k isn't compatible." Is that from first hand experience or just research???

Since Intel " K " CPU's are unlocked would it be possible to adjust the base clock???

I have 13 of the Dell 990's but no i7-2600K to test with, so I cannot say yes or no???

Regards,

U2

30698

" K " CPU's use over 95W whereas the "T" cpus use 45W.

All 790 990 units have LESS THAN 300W power supply.

95W cpu needs optional 365W power supply minimum. 

EVGA 700BR is bare minimum recommended upgrade.

https://www.bestbuy.com/site/evga-700w-atx12v-eps12v-80-plus-bronze-power-supply-dc-dc-technology-bl...

 


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30692

I thought that the 990 came with an i5-2400

The TDP is 95W.

https://ark.intel.com/content/www/us/en/ark/products/52207/intel-core-i5-2400-processor-6m-cache-up-...

Just like the i7-2600 and the i7-2600K???

That's why I thought the i7-2600K should work if the i7-2600 will???

Just asking.

Regards,

U2

30687

That's a good question since there's few differences between the two.  The non-K version looks like it's a little better than the K version.  Exception being the non-K has Intel HD Graphics 2000 and the K has 3000.

https://ark.intel.com/content/www/us/en/ark/compare.html?productIds=52213,52214  Differences are highlighted in blue.




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- If you have an Optiplex, stating its model number AND size speeds up troubleshooting. Components vary.

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22488

28% is not a mere improvement... It is more than the average generational improvement in graphics cards and CPUs. So that's a pretty large improvement

22450


@greywolf79 wrote:

28% is not a mere improvement... It is more than the average generational improvement in graphics cards and CPUs. So that's a pretty large improvement


Not really, as the CPU is the only thing that gets faster, while upgrading to a new platform generation will give you faster memory, higher performance chipsets, increased system bandwidth, upgraded integrated graphics, etc., all in addition to the faster CPU, leading to a much higher overall performance increase.

I have found, that unless you are significantly upgrading BOTH the clock speed and the number of cores (2 core to 4, 4 cores to 6/8) then the time, money and effort in upgrading processors is simply not worth it.

In this case, both processors are quad-core and the i5 has a base processor speed of 3.1 GHz, while the i7 increases this slightly to 3.4 GHz - unless the i7 is for free, why bother?

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