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BIOSTAR A870U3 AM3 AMD 870 SATA 6Gb/s USB 3.0 ATX AMD Motherboard

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Purchases from these Sellers are generally covered under our Newegg Marketplace Guarantee.
Marketplace Seller
  • AMD 870
  • Phenom II / Athlon II / Sempron
  • DDR3 800/1066/1333(supported by CPU model)/1600(OC)

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  • Specifications
  • Warranty & Returns
  • Reviews

Learn more about the Biostar A870U3

Warranty, Returns, And Additional Information
  • Warranty
  • Limited Warranty period (parts): 3 years
  • Limited Warranty period (labor): 3 years
  • Read full details
  • Return Policies
    • Return for refund within: 30 days
    • Return for replacement within: 30 days
  • This item is covered by Newegg.com's Standard Return Policy.
Ownership: more than 1 year
Verified Owner
5/ 5
Very Reliable

Pros: I have owned this board and have run it almost daily since 2011 without a single problem. Everything still works 100%. I have seen lots of bad reviews of Biostar boards so maybe I keep getting lucky as I have been building systems with their boards for well over a decade without any issues or failures.

Cons: AM3 only so no FX support. I have been running a Sempron 145 on it since 2011 and would upgrade the CPU but all of the decent Phenoms cost as much/more used nowadays then they did new so I might as well start all over with a new build than pay $200+ for a Phenom II x6 1100T when I can get a FX-6300 and a Biostar TA970 for the same price. The only other con would be that while this motherboard can do CrossfireX, the two PCI-e slots are too close together to run two dual slot cards. The TA970 also has this same problem. No worries if you only plan to run one high GPU though.

Other Thoughts: This, like all my previous Biostar boards, has been a very reliable product and I would not hesitate to buy another board from them in the future.

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Ownership: more than 1 year
Verified Owner
4/ 5
Good budget AM3 board

Pros: Core Unlocker worked perfectly.

Cheap.

Cons: VRM and mosfets are subpar, so you're not going to be able to OC very well, but what do you expect out of a board this cheap?

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Ownership: more than 1 year
Verified Owner
5/ 5
Flawless. Over a year and still running great.

Pros: This motherboard, although my first board, is an excellent budget board. If you want to get started with a simple/cheap AMD set up this is your sure fire way to start. After a year of using it i have had ZERO problems and i haven't even tried unlocking BIOS to OC because well i can't afford proper cooling.

Cons: My only grip is that it only supports 16 Gbs of RAM not that i need more.

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Ownership: 1 month to 1 year
4/ 5
Good Motherboard...but verify

Pros: This motherboard has been working good for me for almost a year now.

You can look at my specs, but essentially it's great. I've got room for expansion and upgrading and everything.

Got it open box for $41.

It's red/black, like most of the rest of my innards.

Cons: Ok, here's where things get messy. I haven't completely confirmed this (ran a few memory tests with all slots occupied, and the good slots occupied, but none with just the supposedly bad RAM slots occupied. It could be that all four slots are working great even today, but I've had too many bad memory tests to be sure.

I've also had problems with PCI slots not showing up...but sometimes they do show up, on the other hand.

NO IDE. I was rather surprised with this when I received the mobo, but I guess it's to be expected. I had a 160GB hard drive and a pair of near-identical 40GB drives I'd have liked to try RAID with, but no go, even with an IDE PCI card. (couldn't figure out the drivers)

No onboard video...

Only 4 rear USB. My case has a couple of front-mounted USB ports, but even with them, I find myself occupying most of them without adding all my devices.

Other Thoughts: My computer:

$35 NZXT Gamma (1 included 120mm fan) (Newegg)
$15 2 Rosewill 120mm fans top mounted. (Blue LEDs) (Newegg)
$41 Biostar A870U3 AM3/DDR3/USB3/SATA 6Gbps/2xPCIe16x (1@4x) (Newegg; open box)
$35 AMD Athlon II 4X 620 2.6Ghz (unlockable L3 cache; don't usually keep it on 'cause it disables temp readings.) (cragslist)
$15 Rosewill RCX-Z1 CPU fan/heatsink (Newegg)
$28 PNY XLR8 2x2 GBs DDR3 1600Mhz (Newegg; rebate)
$41 Samsung Spinpoint F3 1TB HDD (Newegg; open box)
$25 Powercolor Radeon HD5770 1GB GDDR5 850/1200 (craigslist)
$15 550W PSU (might be High Power) (craigslist)

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Ownership: more than 1 year
Verified Owner
5/ 5

Pros: Fantastic motherboard for the price. Was the only board in my price range with USB3. Very pleased with the product.

Cons: None.

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Ownership: more than 1 year
5/ 5
Biostar all the way

Pros: Rock solid for 2 years with a Phenom X4 965 and 16 gig of Kingston Hyper-X 1066 mhz.

Cons: I didn't get it for my build until AFTER my Asus board died.

Other Thoughts: Asus refused to honor the warranty because I didn't stick to their pathetically short list of supported RAM. If the rem is the right speed and other specs., it should work. It DID work for a year before dying. Their loss is Biostar's gain!!

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1/ 5
Where's my rebate?

Comments: Company did not send rebate. Why are these companies allowed to do this?

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Manufacturer Response:
For rebate inquiry/status, please contact gerry@biostar-usa.com
5/ 5
Solid Board

Comments: Absolutely no complaints. Yes I put in a con but it isn't their fault I picked a case with a short fan cable... Still someone will want to know it's a possible shortcoming when selecting this board and using an existing case.

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  • New : This means the product will ship as received by the manufacturer, sealed, with all advertised components, and with the manufacturer warranty.
  • Refurbished : This means the product was tested and repaired as required to meet the standards of the refurbisher, which may or may not be the original manufacturer. Any exceptions to the condition of the item outside the manufacturer’s information should be provided in the listing, up to and including warranty details.
  • Open Box : Newegg only guarantees your receipt of the Open Box product with the purchase of this item. Any accessories MAY OR MAY NOT be included. Newegg will NOT send you any missing accessories, even if it is required to use all of the item’s functions.Open Box items usually do not come with manufacturer or vendor warranty or technical support. However, warranty support may be available if an item was never registered by a previous owner. Please contact the manufacturer to check.
  • Used - Like New : This means that the product has been opened, possibly used but is in perfect condition with no signs of cosmetic or functional defect. Product may includes warranty, and accessories found with the original product. Product may or may not be in the original packaging. Returned items with minor packaging defects fall under this category.
  • Used - Very Good : This means that the product has been opened, may show slight signs of use and cosmetic blemish, and may be missing minor accessories, but remain in excellent condition. Product does not come with warranty unless stated otherwise in product description.
  • Used - Good : This means that the product has been used, may show clear signs of use and may be missing minor accessories, but remain in good condition. Product does not come with warranty unless stated otherwise in product description.
  • Used - Acceptable : This means that the product shows clear signs of use, cosmetic defect, and may be missing minor accessories and manual, but remain in working condition. Product does not come with warranty unless stated otherwise in product description. Functionality issues beyond signs of use should be disclosed in product description.
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