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OCZ PSU 520W Modstream ATX/BTX/PCI-e

alaTest has collected and analyzed 48 reviews of OCZ PSU 520W Modstream ATX/BTX/PCI-e. The average rating for this product is 4.5/5, compared to an average rating of 4.0/5 for other Printers for all reviews. Reviewers really like the reliability and design. The performance and usability also get good comments, but the size and durability get mixed views.

noise, usability, performance, design, reliability

We analyzed user and expert ratings, product age and more factors. Compared to other Printers the OCZ PSU 520W Modstream ATX/BTX/PCI-e is awarded an overall alaScore™ of 76/100 = Good quality.

Review analysis

(Based on 48 reviews)

User Reviews  

Showing 48 review(s)

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Showing 1 - 10 of 48 Show Reviews: in English

Consumer review (

It's pretty


Nice big fan, blue LEDs, and a mirror finish. Has some heft to it as well. Modular cables are nice

I wish the main power cable had been 3 inches longer. I had to break out my patented cable stretcher to make it work

Sep, 2006

Consumer review (

Great pick for such a price :)


It had a proper stable test using my power supply tester straight out of the box,I have been running it 24/7 most of the time for a good two months now and no problems. I originally bought this power supply in order to use my Radeon GTO 512mb video...

Cords are a bit fat and do not twist,turn,adequately enough in order to create perfect airflow within one's pc. That is if you have a mid-range tower case. But any self bought case should be big enough. ;) You see I have a dell e510 case,and the cords...

Sep, 2006

Consumer review (

Best PS I've owned


Would definately purchase again.

Extremely high quality - everything is well built. Very quiet. Only use the cables you need which helps keep inside of case tidy. Been using it almost 2 yrs now without issue

None.. cables are not overly stiff as some said - good high quality cables will not be extremly flexible

Sep, 2006

Consumer review (

Nice for low power loads


This supply is quite nice, but if you're building a gaming system and want stability I would suggest a supply with more power available on the 12V rail. (At least 30 total, preferably on one rail or as few rails as possible.)

The case looks nice, and the cable management connectors are a nice addition. Also, the 120mm fan allows a good deal of ventilation through the unit. Voltage on the 12V rail is stable at lower system loads

When everything in my computer is connected, the 12V rail dips to around 11.5V-11.7V. While I do have a good deal of load on that rail, I don't believe it should dip this much. (My previous supply dipped similarly but had only 18A on the rail..)

Aug, 2006

Consumer review (

Piece of junk


its a piece of junk, dont buy it.

it looks great

After a few days od use this thing killed my harddrive, i didnt know this psu was the problem at the time and i got another harddrive, it killed this harddrive as well, i did not contact westerndigital yet to see if they will replace my harddrive for a...

Aug, 2006

Consumer review (

Not a 620 its a 450 watt!


This is one sweet psu - very nice conectors - highly recommended! Do Not Use it for 2 gpu card set up its weak. First 3 days the power moved around alot but its more stable with more things on it.

I ordered this and swore i ordered a 600 watt psu and i got it and it says its 450 watt psu? Yes the box says 450 watt. % star product! -1 star for wrong power rating. Note since its got such a high 5v rating it may be a 600 watt but my says on the box...

Do not use this for sli or cross fire its not for that. Its got a really high 5v which is useless and low 12v which is what u need ; You need 13-15 amps min per card this has 26 which means with fans and stuff you can use it

Jul, 2006

Consumer review (

OCZ ModStream OCZ52012U


If you need long or flexible cables, this one isn't for you. Otherwise, it can be quite nice.

It provides stable power and twaekable voltages

Stif cables, and short ATX2 cable made it unusable for my appplication using a large Antex case with a bottom mounted power supply

Jun, 2006

Consumer review (

Decent but did not make me complete


overall good psu but if you have powerful hardware go with better hardware. only 26amps on a single 12v rail, but hey it was my fault.

this psu is nice, had a nice fan but puts heat back into the case? Looks nice, thats about all

wires are hard to hide i have a thermaltake shark case and its still hard to squeeze around. also its 620 watt peak and 520 watt on the box iw as puzzled. The thing that frustrates me the most is that the 12v rail stays at 11.58-11.71.. not too stable....

Jun, 2006

Consumer review (

i love this PSU!


Have been running my modstream 520W since August and has given me no problems unlike the PSU that came with my tower. I'm glad i spent the extra money for a quality power supply

would be cool if it had adjustable rails

Apr, 2006

Consumer review (

OCZ ModStream OCZ52012U 520W ATX / BTX Modular Active PFC Power Supply


This Powersupply has an awsome finish on it, i recommend it to anybody with a plexi glass side window. This has also made my case look much more nice with its Modular cabling system.

Lots of power for high-end video cards. much more quiet than my previous PSU

Second time booting up it made a noise, fixed this problem by a little tap on the tower, and i havnt heard it again

Apr, 2006

Product Specifications

The OCZ ModStream power supply family is the quietest, sleekest, most versatile PSU available today! The ModStream comes in 450W/520W configurations with 550W/620W peak loads; they are the ideal solution for PC-users desiring a high-quality mix of power and versatility in their system. Every ModStream is equipped with OCZ EZMod technology. This advanced cable management system allows you to truly customize you power system to utilize only the UV cables you require, resulting in optimal airflow and the coolest possible environment within your case! All EZMod cables glow brightly when illuminated with UV lighting accessories. OCZ knows that high performance doesn't have to come with annoying fan noise! Each ModStream is built with PowerWhisper technology to significantly reduce noise levels to virtual silence, making this the quietest power supply on the market. Experience leading edge reliability and performance with increased air flow, courtesy of a whisper quiet, yet extremely vigorous 120mm fan complete with attractive blue LEDs. The OCZ Modstream features PowerShield EMI control technology with copper shielded power leads to provide the added benefit of extreme current stabilization and delivery of the cleanest possible output to all your critical system components.

Dimensions & Weight



Product Type:Power supply
Subcategory (AG):Power supplies


Manufacturer:OCZ Technology
Packaged Quantity:1
Product Line:OCZ ModStream

Power Device

Form Factor (AG):Internal
Output Connector Qty:11
Power Provided:520Watt
Power Supply Compatibility:PC/Server

Service & Support

Type:3 years warranty