Question Can my psu handle this setup?

Jun 20, 2019
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Hi, can yall help me?

I want to put an I5 4690k in a my system which is a dell optiplex 3020 mt with a 290w psu ( and if I can't go for a 4690k, is a 4690 OK?)

Specs-
I3 4160 3.6ghz
Rx560 4gb
8gb ram ddr3
Sata 7.2k rpm hdd 500gb
Intel h81 chipset
 
I would not, for several reasons:

1. Your RX560 is already pushing the limits of a 290w psu.
http://www.realhardtechx.com/index_archivos/Page362.htm
You would be going from a processor with a 54w TDP to one with a 84 0r 88w tdp.

2. A H81 chipset will not let you take advantage of the K suffix processor.

3. You may not notice the difference, depending on what you are using the pc for.
All three processors have 4 threads. The 4690 or 4690K will be some 25% more capable when all 4 threads are fully utilized as in batch editing apps.
But, for gaming the single thread performance will be perhaps only 10% better.
If you are playing games, a better graphics card is likely to be a better upgrade.
But, for a significant jump in gpu power, you are going to need to buy a stronger psu.

Try this test:

Run YOUR games, but lower your resolution and eye candy.
If your FPS increases, it indicates that your cpu is strong enough to drive a better graphics configuration.
If your FPS stays the same, you are likely more cpu limited.
 
Jun 20, 2019
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Thanks for replying, I have decided to upgrade my cpu to a S suffix one. Can you please recommend a good I5 or i7 s series processor that would go with my setup plz?
 
Thanks for replying, I have decided to upgrade my cpu to a S suffix one. Can you please recommend a good I5 or i7 s series processor that would go with my setup plz?
The I7-4790S would be my recommendation for the upgrade... it has a TDP of only 65W.
Before upgrading the CPU make sure that you have the latest BIOS version(A20 for your optiplex 3020).
 

Third-Eye

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You can't overclock the K series CPU in a non-overclocker motherboard, but it will still boost to its maximum so it's not always a waste of money if you can get it for a good price and it's compatible with your motherboard.
 
You may want to reconsider going with a non-s processor as apparently they run nice and cool (so probably are not using peak power):
https://www.dell.com/community/Optiplex-Desktops/Optiplex-3020-MT-i7-4790-CPU-upgrade-successful/td-p/6180089

You do sacrifice some serious performance gains by going with the s version:
https://www.cpubenchmark.net/compare/Intel-i3-4160-vs-Intel-i7-4790S-vs-Intel-i7-4790K/2317vs2258vs2275
The I7-4790S performs almost on par with the I7-4790... you really don't sacrifice some "serious" performance by going this route. They have the same turbo frequency, the S variant having a lower base clock. You'll run on average 100-200 MHz lower on the 4790S which really isn't that big of a deal considering they're basically the same chip, one of them having slightly reduced(4790S) clocks to lower it's TDP.
 

Third-Eye

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The I7-4790S performs almost on par with the I7-4790... you really don't sacrifice some "serious" performance by going this route. They have the same turbo frequency, the S variant having a lower base clock. You'll run on average 100-200 MHz lower on the 4790S which really isn't that big of a deal considering they're basically the same chip, one of them having slightly reduced(4790S) clocks to lower it's TDP.
I own the 4770s and it only boosts 100Mhz slower than the 4790s at 3.9Ghz on a single core, but using all cores and threads it only boosts to 3.5Ghz. I would assume the 4790S would be 3.6Ghz all cores. So no, that difference is not as small as you make it seem. The 4770s performs about as fast as a 3770 or my 2600k oc'ed to 4.5Ghz. which is around 15% or 10-13fps slower than a 4770k.
 
I own the 4770s and it only boosts 100Mhz slower than the 4790s at 3.9Ghz on a single core, but using all cores and threads it only boosts to 3.5Ghz. I would assume the 4790S would be 3.6Ghz all cores. So no, that difference is not as small as you make it seem. The 4770s performs about as fast as a 3770 or my 2600k oc'ed to 4.5Ghz. which is around 15% or 10-13fps slower than a 4770k.
I want to see a source from where you're getting your numbers.

Here's the first article that you find just searching on google:

I7-4790 vs I7-4790 performance

From here I'm actually seeing that the 4790S is boosting higher or equal when a lower amount of threads are used. When all 8 threads are used the 4790 has a 200 MHz advantage. Even at that frequency the difference is nowhere near 15% as you're pointing out.... more like 5% or less betweem the 4790S and 4790. Based on that, in my honest opinion, they're really similar in performance.
 

Third-Eye

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Those are synthetic benchmarks, not real world situations or game benchmarks. It doesn't really matter though anyway as even an i7 S model is an upgrade over an i3 and an i7 S or T model would be a better match for OPs system with such a low power PSU. The biggest issue may be that the i7 S with the RX 560, could cause total system power draw to exceed what the 290W PSU can handle right now with the i3. The OP will need to buy a 450-550W PSU and an adapter for the motherboard 8pin system power or they're probably going to be limited to at most an i5-4570/4590.
 
RX 560 power consumption

Around 100W for the GPU with the I7 4790S at around 65-70W + other hardware(storage, mobo, ram, etc.)... would bring the total system power consumption(full load) at a total of 200-220W in the worst case scenario.

A problem would be the quality of the PSU and not the power output.
From what I can gather you have the 290W L290EM HY3VH model.


It has 2 +12V rails... 12Va(168W max) is most likely reserverved for the CPU+mainboard(PCIe which is 75W) and 12Vb(192W max) for the GPU aux power, storage devices, etc.

It's an 80+ Bronze certified unit, but the quality looks a bit dodgy when glancing over the manufacturer.
Lite-On is a chinese brand that usually produces junk PSUs, so I can't imagine this one being that much better.

With all the above said.... switching to an I7 4790S or an I5 4590S(they have the same 65W tdp) from the 54W I3 will be a really small jump in power consumption...this upgrade will most likely work with the current PSU.
 

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