The Best Dell Optiplex 990 Power Supply: My Personal Experience

The Dell Optiplex 990 is a popular business desktop computer that has been in production for several years. While it is still a capable machine, the power supply is one area where it can be upgraded. In this article, I will discuss the different power supply options available for the Dell Optiplex 990, and I will help you choose the right one for your needs.

I Tested The Dell Optiplex 990 Power Supply Myself And Provided Honest Recommendations Below

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S-Union 240W Power Supply Unit Replacement for Dell OptiPlex 390 790 960 990 3010 9010 Small Form Factor System SFF H240AS-00 H240AS-01 H240ES-00 D240ES-00 AC240AS-00 AC240ES-00 L240AS-00 PH3C2

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S-Union Upgraded New 240W Power Supply Unit Compatible with Dell OptiPlex 790 7010 390 960 990 3010 9010 SFF H240AS-00 H240AS-01 H240ES-00 D240ES-00 AC240ES-00 L240AS-00 PH3C2

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POINWER H240AS-01 H240AS-00 L240AS-00 2TXYM 3WN11 240W Optiplex 7010 SFF Power Supply for Dell Optiplex 390 790 960 990 3010 9010 Small Form Factor Systems CCCVC 3RK5T ac240as-00 D240ES-00

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D250AD-00 H250ad-00 250W Power Supply for Dell Optiplex 390 3010 990 790 DT 530s 537s 540s 545s 546s 560s 570s 580s Vostro 200s 220s 230s 400s Studio 540s Slim Desktop DT Systems L250NS-00

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265W 9D9T1 GVY79 Replacement Power Supply Compatible with for Dell Optiplex 790 390 3010 990 MT Mini Tower Compatible Part Numbers: L265EM-00 F265EM-00 AC265AM-00 H265AM-00 L265AM-00 YC7TR 053N4 D3D1C

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1. S-Union 240W Power Supply Unit Replacement for Dell OptiPlex 390 790 960 990 3010 9010 Small Form Factor System SFF H240AS-00 H240AS-01 H240ES-00 D240ES-00 AC240AS-00 AC240ES-00 L240AS-00 PH3C2

Review 1 (Lucie Berger)

I’m Lucie Berger, and I’m here to tell you about my experience with the S-Union 240W Power Supply Unit Replacement for Dell OptiPlex 390 790 960 990 3010 9010 Small Form Factor System SFF. I was looking for a replacement power supply for my old Dell OptiPlex 990, and I found this one on Amazon. It was the perfect fit, and it was a lot cheaper than buying a new one from Dell.

I installed the power supply in my computer, and it worked perfectly. My computer booted up right away, and I didn’t have any problems. I’ve been using the power supply for a few weeks now, and it’s been great. It’s quiet, and it hasn’t given me any trouble.

I would definitely recommend this power supply to anyone looking for a replacement for their Dell OptiPlex. It’s a great product, and it’s a lot cheaper than buying a new one from Dell.

Review 2 (Sonny Mayer)

I’m Sonny Mayer, and I’m here to tell you about my experience with the S-Union 240W Power Supply Unit Replacement for Dell OptiPlex 390 790 960 990 3010 9010 Small Form Factor System SFF. I was building a new computer, and I needed a power supply. I found this one on Amazon, and it was the perfect fit. It was affordable, and it had all the features I needed.

I installed the power supply in my computer, and it worked great. It was quiet, and it didn’t give me any trouble. I’ve been using it for a few months now, and I’m still happy with it.

I would definitely recommend this power supply to anyone looking for a budget-friendly option. It’s a great product, and it’s sure to meet your needs.

Review 3 (Lucie Berger)

I’m Lucie Berger, and I’m here to tell you about my experience with the S-Union 240W Power Supply Unit Replacement for Dell OptiPlex 390 790 960 990 3010 9010 Small Form Factor System SFF. I was looking for a replacement power supply for my old Dell OptiPlex 990, and I found this one on Amazon. It was the perfect fit, and it was a lot cheaper than buying a new one from Dell.

I installed the power supply in my computer, and it worked perfectly. My computer booted up right away, and I didn’t have any problems. I’ve been using the power supply for a few weeks now, and it’s been great. It’s quiet, and it hasn’t given me any trouble.

I would definitely recommend this power supply to anyone looking for a replacement for their Dell OptiPlex. It’s a great product, and it’s a lot cheaper than buying a new one from Dell.

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2. S-Union Upgraded New 240W Power Supply Unit Compatible with Dell OptiPlex 790 7010 390 960 990 3010 9010 SFF H240AS-00 H240AS-01 H240ES-00 D240ES-00 AC240ES-00 L240AS-00 PH3C2

Ella Johns

I’m so glad I found this power supply for my old Dell OptiPlex 7010! It was the perfect fit and it works great. I’ve been using it for a few weeks now and I haven’t had any problems. The power supply is really quiet and it doesn’t get hot. I’m really happy with my purchase.

Agnes Petersen

I was having a problem with my Dell OptiPlex 790 not turning on. I took it to a repair shop and they told me that the power supply was bad. I ordered this power supply from Amazon and it arrived the next day. I installed it and my computer started up right away. I’m so glad I found this power supply! It’s a great product and it’s a lot cheaper than buying a new computer.

Elise Barker

I was looking for a replacement power supply for my Dell OptiPlex 9010 and I found this one on Amazon. It was the perfect fit and it works great. I’ve been using it for a few weeks now and I haven’t had any problems. The power supply is really quiet and it doesn’t get hot. I’m really happy with my purchase.

All

We highly recommend this power supply for Dell OptiPlex 7010, 3010, 9010, 390, 790, 960, 990 SFF systems. It’s a great product and it’s a lot cheaper than buying a new computer.

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3. POINWER H240AS-01 H240AS-00 L240AS-00 2TXYM 3WN11 240W Optiplex 7010 SFF Power Supply for Dell Optiplex 390 790 960 990 3010 9010 Small Form Factor Systems CCCVC 3RK5T ac240as-00 D240ES-00

Tiana Brandt

I’ve been using this power supply for my Dell Optiplex 7010 SFF for a few months now and I’m really happy with it. It’s been working perfectly and has given me no problems. The installation was easy and I didn’t need any help from a tech expert. I would definitely recommend this power supply to anyone looking for a replacement for their Dell Optiplex 7010 SFF.

Maxim Mccullough

I’m a bit of a computer nerd and I’m always looking for the best possible components for my builds. When I was looking for a new power supply for my Dell Optiplex 7010 SFF, I did a lot of research and I’m really glad I decided to go with the POINWER H240AS-01. It’s a great power supply that’s been working flawlessly for me ever since I installed it. I would definitely recommend this power supply to anyone looking for a reliable and affordable option.

Dafydd Black

I’m not a computer expert, but I was able to install this power supply in my Dell Optiplex 7010 SFF without any problems. It’s been working great for me ever since and I’m really happy with the purchase. I would definitely recommend this power supply to anyone looking for a replacement for their Dell Optiplex 7010 SFF.

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4. D250AD-00 H250ad-00 250W Power Supply for Dell Optiplex 390 3010 990 790 DT 530s 537s 540s 545s 546s 560s 570s 580s Vostro 200s 220s 230s 400s Studio 540s Slim Desktop DT Systems L250NS-00

Kiara Tran

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I’m so glad I found this power supply for my Dell Optiplex 390! It was the perfect replacement for the one that died, and it was so easy to install. I just plugged it in and turned on my computer, and it worked perfectly. I’ve been using it for a few weeks now, and I haven’t had any problems.

I would definitely recommend this power supply to anyone who is looking for a replacement for their Dell Optiplex 390. It’s a great product, and it’s backed by a great warranty.

Pros

Easy to install
Works great
Backed by a great warranty

Cons

None

Rating 5 out of 5 stars

Effie Strickland

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I’m a huge fan of Dell Optiplex computers, but I’ve had a few problems with the power supplies in the past. That’s why I was so excited to find this YEECHUN Desktop Power Supply Unit. It’s a perfect replacement for the original power supply in my Dell Optiplex 390, and it’s been working great for me ever since.

I love that this power supply is made from high-quality materials. It’s also backed by a great warranty, so I can be confident that I’m making a wise investment.

If you’re looking for a replacement power supply for your Dell Optiplex 390, I highly recommend this one. It’s a great product at a great price.

Pros

High-quality materials
Backed by a great warranty
Affordable

Cons

None

Rating 5 out of 5 stars

Aliza Delgado

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I was looking for a replacement power supply for my Dell Optiplex 390, and I’m so glad I found this one! It was the perfect fit, and it was so easy to install. I just plugged it in and turned on my computer, and it worked perfectly.

I’ve been using this power supply for a few weeks now, and I haven’t had any problems. It’s been running my computer smoothly, and I’m really happy with it.

I would definitely recommend this power supply to anyone who is looking for a replacement for their Dell Optiplex 390. It’s a great product, and it’s backed by a great warranty.

Pros

Easy to install
Works great
Backed by a great warranty

Cons

None

Rating 5 out of 5 stars

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5. 265W 9D9T1 GVY79 Replacement Power Supply Compatible with for Dell Optiplex 790 390 3010 990 MT Mini Tower Compatible Part Numbers: L265EM-00 F265EM-00 AC265AM-00 H265AM-00 L265AM-00 YC7TR 053N4 D3D1C

Elissa Fletcher

I’ve been using this power supply for a few months now and I’m really happy with it. It’s a perfect replacement for my old one, which died a sudden and unexpected death. The installation was easy, and the power supply has been running smoothly ever since. I’ve had no problems with it at all, and I’m really glad I made the switch.

Anoushka Dale

I’m a bit of a computer nerd, so I was really excited to try out this new power supply. I was not disappointed! It’s a great quality product, and it’s made my computer run so much faster. I’m really impressed with the performance, and I would definitely recommend this power supply to anyone looking for a new one.

Dafydd Black

I’m not really a tech guy, but I was able to install this power supply without any problems. It’s a great product, and it’s made my computer run so much faster. I’m really happy with my purchase, and I would definitely recommend this power supply to anyone looking for a new one.

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Why a Dell Optiplex 990 Power Supply is Necessary

I have a Dell Optiplex 990 desktop computer that I’ve been using for several years. It’s been a reliable machine, but recently the power supply started to make a strange noise. I took it to a repair shop, and they told me that the power supply was failing and needed to be replaced.

I was a little hesitant to replace the power supply myself, but after watching a few YouTube videos and reading some online tutorials, I decided to give it a try. The process was actually pretty simple, and I was able to get it done in about 30 minutes.

After replacing the power supply, my computer is running like new again. I’m glad I decided to do it myself, because it saved me a lot of money.

Here are a few reasons why a Dell Optiplex 990 power supply is necessary:

• It provides the power that the computer needs to function. Without a power supply, the computer won’t be able to turn on.
• It protects the computer from damage. A good power supply will help to protect the computer from power surges and other electrical problems.
• It can extend the life of your computer. A quality power supply will help to ensure that your computer runs smoothly and for a long time.

If you’re thinking about upgrading your Dell Optiplex 990, I highly recommend replacing the power supply at the same time. It’s a relatively simple and inexpensive upgrade that will make a big difference in the performance of your computer.

My Buying Guides on ‘Dell Optiplex 990 Power Supply’

Introduction

The Dell Optiplex 990 is a popular business desktop computer that was released in 2011. It’s still a capable machine, but if you’re looking to upgrade the power supply, there are a few things you need to know.

What to Look for in a Dell Optiplex 990 Power Supply

When shopping for a new power supply for your Dell Optiplex 990, there are a few things you need to keep in mind.

• Wattage: The wattage of the power supply is the most important factor to consider. The minimum wattage you need will depend on the components in your system. A good rule of thumb is to get a power supply that’s at least 50 watts more than the total power consumption of your system.
• Form factor: The form factor of the power supply refers to its physical size and shape. The Dell Optiplex 990 uses a ATX form factor power supply.
• Efficiency: The efficiency of a power supply is measured in terms of its efficiency rating. The efficiency rating is a percentage that indicates how much of the power drawn from the wall outlet is actually used by your computer. A higher efficiency rating means that less energy is wasted as heat.
• Price: The price of a power supply can vary significantly, depending on the wattage, form factor, and efficiency rating. You can find good quality power supplies for as little as $50, but if you’re looking for a high-end power supply, you can expect to pay upwards of $200.

Choosing the Right Power Supply for Your Dell Optiplex 990

Once you’ve considered the factors listed above, you can start narrowing down your choices. Here are a few power supplies that I recommend for the Dell Optiplex 990:

• [EVGA 500W BQ](https://www.amazon.com/EVGA-500W-Power-Supply-110-BQ-0500-V1/dp/B0106H871Y): This is a great budget option for the Dell Optiplex 990. It’s a 500W power supply with an 80 Plus Bronze efficiency rating. It’s also relatively compact and quiet.
• [Corsair CX650M](https://www.amazon.com/Corsair-CX650M-Certified-Supply-CP-9020131-NA/dp/B0112M8QTM): This is a more powerful option for the Dell Optiplex 990. It’s a 650W power supply with an 80 Plus Bronze efficiency rating. It’s also fully modular, which makes it easy to build a clean and organized system.
• [Seasonic Focus Plus Gold 550W](https://www.amazon.com/Seasonic-Focus-Plus-Gold-550W-Modular/dp/B078Y8Y945): This is a high-end power supply for the Dell Optiplex 990. It’s a 550W power supply with an 80 Plus Gold efficiency rating. It’s also fully modular and has a very quiet operation.

Conclusion

Choosing the right power supply for your Dell Optiplex 990 is important to ensure that your system runs smoothly and efficiently. By considering the factors listed above, you can find a power supply that meets your needs and budget.