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OCZ Z-SERIES 850W 80+ Gold Certified 24PIN ATX 71A Modular Power Supply With 135mm Fan

This item is warranted by the product manufacturer only.
OCZ Z-SERIES 850W 80+ Gold Certified 24PIN ATX 71A Modular Power Supply With 135mm Fan - 1
Actual product may not be exactly as shown.
OCZ Z-SERIES 850W 80+ Gold Certified 24PIN ATX 71A Modular Power Supply With 135mm Fan - 50802_l.jpg OCZ Z-SERIES 850W 80+ Gold Certified 24PIN ATX 71A Modular Power Supply With 135mm Fan - 50802_1.jpg OCZ Z-SERIES 850W 80+ Gold Certified 24PIN ATX 71A Modular Power Supply With 135mm Fan - 50802_2.jpg Customer Photos (0)
OCZ Technology
Reg. Price: $217.91  CAD
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   Shipping Weight:   8.2 lbs
   Part #: OCZZ850M
 May We Also Suggest

Features    [ Edit | History ]

The Z850M ATX12V & EPS12V Power Supply feature ultra-high efficiency of 90% and have achieved the 80+ Gold Certification. OCZ strived to make the Z850M a true "best-in-class" power supply, including a powerful single +12-volt rail design and an industrial-grade core engineered for maximum stability and reliability. Built for excellence, the Z850M raises the bar in power management and provides an unparalleled solution for enthusiasts who won't settle for anything less.

Quick Specs:
Efficiency 90%
Input Voltage 110 V AC 220 V AC
Output Power 850 W
Limited Warranty 5 Year
Output Voltage 3.3 V DC @ 25 A 5 V DC @ 25 A 12 V DC @ 71 A -12 V DC @ 800 mA 5 V DC @ 6 A
Height 3.4"
Width 5.9"
Depth 6.3"
Number of Fans 1
Green Compliant Yes
Green Compliance Certificate/Authority 80 Plus Gold
NVIDIA SLI Supported Yes

Specifications    [ Edit | History ]
General Information  
     Brand Name: OCZ Storage Solutions
     Manufacturer: OCZ Storage Solutions, Inc.
     Manufacturer Part Number: OCZZ850M
     Manufacturer Website Address:
     Product Model: Z850M
     Product Name: Z850M ATX12V & EPS12V Power Supply
     Product Series: Z
     Product Type: ATX12V & EPS12V Power Supply
     Receptacles: 1 x 24-pin ATX Motherboard
1 x 4+4pin ATX12V Motherboard
1 x 8-pin EPS12V Motherboard
12 x Serial ATA
4 x 6+2pin PCI-E
3 x 4-pin LP4 Peripheral Device
1 x 4-pin SP4 Floppy Drive
     Additional Information:

Total Input Current: 11A

     Green Compliance Certificate/Authority: 80 Plus Gold
     Green Compliant: Yes
Physical Characteristics  
     Depth: 6.3" (160 mm)
     Height: 3.4" (86.4 mm)
     Width: 5.9" (149.9 mm)
Power Description  
     Input Voltage: 110 V AC
220 V AC
     Input Voltage Range: 100 V AC to 240 V AC
     Output Power: 850 W
     Output Voltage: 3.3 V DC @ 25 A
5 V DC @ 25 A
12 V DC @ 71 A
-12 V DC @ 800 mA
5 V DC @ 6 A
Technical Information  
     Efficiency: 90%
     Number of Fans: 1
     NVIDIA SLI Supported: Yes
     Power Factor Correction (PFC): Active
     Limited Warranty: 5 Year

OCZ Technology OCZZ850M Customer Reviews

Product reviews on are screened for relevance and inappropriate content. Reviews may contain inaccurate information about the product. If there is a discrepancy, please use the Flag this Review link located beside each review. Reviews are not an endorsement expressed by, but opinions from customers based on their own experience with a product. We do not recommend you make purchasing decisions based on facts or opinions expressed regarding OCZ Technology OCZZ850M reviews.
Experience: 6 Months
 Verified Owner
None at all. Such a POS PSU!
Cuts out power all the time and shuts down the PC almost damaging my components.
I bought this PSU thinking I was getting a top quality product only to find out that it is totally crap. My system kept on shutting down all the time. Checked the cables and everything was good except for the AC cable that came with it. It was never settled on the back, way to loose. So I looked for reviews and found out that this PSU has loose pins for the 24 ATX connector. I had to go out and buy a Corsair AX850 Gold+ and never had any issues. PC never shuts down on its own the way it did for months on end with this OCZ PSU. Currently have it RMAed and I will never buy OCZ again.I can never even sell the one they are going to send me because I don't want to sell junk to people. This will be put in electronic recycling when I get it.

Experience: 1 Months
 Verified Owner
-Great power efficiency (80+ gold)
-Lots of extra cables
-Quiet fan
-The fan continues to spin for around a minute after shutting down.
-Not FULLY modular
Note that this is not FULLY modular (look at second picture).
Bought this on sale for 60$ after MIR. Definitely a bargain for a power supply of this caliber. Since my setup is minimal, I only needed to use 1 of the modular cables (for GPU) since my setup is very minimal. My old system went down after the 4-pin connector burned its socket on my motherboard since I purchased a cheap no-name PSU that didnt deliver clean power. Don't make the same mistake as me.

Experience: 1 Weeks
 Verified Owner
Long cables, eye candy
one sata cable set is not modular
great power supply the last one i had was a 600watt and the cables were too short too reach all the motherboard plugs with the video cards installed

Experience: 1 Weeks
 Verified Owner
certified gold
Full modular and gold certified PSU . i got no problem to run a 7970 all working really good

Experience: 30 Days
 Verified Owner
Good PSU, clean power, no problems
Not enough 6-pins for me, fan blows into the case rather than out of it but I'm not using a case
Good 850w PSU. I've run it for 30 days mining bitcoin with 3x 7950s and my Kill-a-watt reads about 675w, so I assume it's pulling 625-ish on the 12v rail. Haven't had a problem yet.

Experience: 26 Days
 Verified Owner
Great price, quiet, great energy efficiency
Ugly cables, short cables, fan spins long after power off
Great item, was a great price point also. However these cables are really short and a struggle to get to plug in. Additionally the psu fan spins long after power off, I noticed it was spinning when I turned off my pc, went to sleep, woke up and its still spinning. Need to hit the switch on the back to kill the power and prevent the psu fan from spinning. Weird. None the less a great price at 69.99 you cant ask for more

Experience: 1 Days
 Verified Owner
Really Quiet
Cables are all the same length
I didn't realize how noisy my old OCZ PSU was, this new one is so much more quiet. Even though it has modular cables I would have liked some shorter ones.

Experience: 2 Weeks
 Verified Owner
Full modular and gold certified PSU
Full modular and gold certified PSU. With 850W you can sustain a high end PC and expect to keep your power up to 5-7 years.

I just have one GC (Radeon 7950), but I overclocked my i7 3770K at 4Ghz and all is doing well!

Experience: 2 Days
 Verified Owner
Modular and rock solid power exactly as advertised!
Rock solid Power! I have two gtx460 sli configuration and needed more power,This fit the bill and then some! I would highly recommend this!

Experience: 1 Months
Lots of power, quiet, efficient
none so far
No problems so far working very well and more than enough power. also very quiet and efficient

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Messages about OCZ Z-SERIES 850W 80+ Gold Certified 24PIN ATX 71A Modular Power Supply With 135mm Fan

anyone running 3x amd 6970 on this? (Xuehai_C- Dec 20, 11, 6 Replies) Read this message

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Forum messages are not reviewed and may not contain accurate information about a product. Message contents are opinions from customers based on their own experience with a product. We do not recommend you make puchasing decisions based on Forum messages.
Reviews from the Web

Below are reviews found on other web sites for this product submitted by customers.

Comment: 8/10 review for OCZ Z-Series 850W modular PSU
Posted by: iPReSSi @06/10/11
Comment: The new OCZ Z Series 850W (OCZ Z850M) breaks one of PC Power & Cooling’s tenets of good power supplies as it is a modular unit. As with the ModXStream PRO 700W this unit is provided by Sirtec (technically now Sirfa).
Posted by: Ferris Bueller @05/12/11
Submit a review link   |   Latest 30 reviews
Product Warranty
First 30 days limited warranty through The remainder of the 3 year warranty is provided directly by the manufacturer.

For additional information and technical assitance, please visit OCZ support at:

OCZ Technical Support

Phone:  1-800-459-1816

Tech Support hours:
9:00 AM-6:30 PM Pacific,

For rebate issues, please contact OCZ Rebate Customer Service:

Rebate Customer Service
(408) 440-3416 Phone
Hours: M-F 9:00 AM-6:00 PM PST

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All pricing subject to change. For all prices, products and offers, reserves the right to make adjustments due to changing market conditions, product discontinuation, manufacturer price changes, errors in advertisements and other extenuating circumstances. Promotional offers from are subject to availability and are available only while supplies last. No rain checks will be issued on promotional items and offers.

While uses all reasonable efforts to include accurate and up-to-date information on the Site, makes no warranties or representations as to the Site's accuracy. assumes no liability or responsibility for any errors or omissions in the content on the Site. warrants product(s) to be in good working condition and free from defects in material and workmanship for a period of one (1) year for OEM packages, and for thirty (30) days for RETAIL packages, from the original Invoice date unless otherwise restricted below or by the manufacturer's own warranty policy. Defective returns and warranty service will be replaced, exchanged or repaired at's sole discretion, and based on vendor's policy.

NON-DEFECTIVE merchandise returns may be accepted on some items ONLY within 15 days of the Invoice date, at's discretion. All NON-DEFECTIVE returns are subject to a 15% restocking fee. No refunds will be issued for blank media, digital cameras (and accessories), opened software, printers, printer supplies, paper, projectors (and accessories), appliances, handhelds, PDAs, notebook computers, special order computers and special order items.

Defective software, video games or DVDs will be replaced by the SAME title and format ONLY (and subject to current availability) within 30 days of the Invoice date. Software, video games and DVDs may be returned within 30 days only if the item is UNOPENED (with shrink wrap still intact) at the sole discretion of does NOT apply a surcharge to credit card orders. Please read our RMA & warranty policy and terms & conditions for more information. If you have any questions regarding our sales and warranty policies, please send us a message -- we'll be glad to answer any of your questions.


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