Any significant difference between the gold drives and the red nas drives?

Reds are usually 5400 RPM and perhaps lower power consumption with the idea of several drives being in the same NAS bay. Reds are also usually 3 year warranty with 1 million hours MTBF. Golds are 7200 RPM, 5 year warranty, 2.5 million hours MTBF.

How noisy are these? Would it be a good choice for quiet high-performance workstation?

I've had two of these WD Gold (2TB) HDD's installed in separate computers, both purchased together in 2016, both are very quiet when compared to the high performance (SATA-2) Caviar Black. Until that point, had been running mostly WD RE4 (SATA-2) drives for data, in a couple of PC's, for OS also. Mainly because I could get these at low cost, often new pulls from servers for $50 or less (500GB to 1TB). Did buy a couple of used ones less, these also held up well. None has died. Yet back to the point & WD Gold, it's as good of a data/desktop drive as it gets. 128MB cache on all models which upgrades to 256MB around 4GB & larger, it beats the current gen WD Black hands down. While the WD Gold does have features for RAID usage, if used as a single desktop drive (or paired with SSD for data, how I use my pair), the performance is nothing less than Outstanding. If one has their PC plugged into a UPS emergency power (highly recommended), for best performance, go into Device Manager & find the drive, under Policies, check 'Turn off Windows write caching buffer flushing for this device' (or similar wording). As far as noise goes, unless in the rare event that the WD Gold has gone bad, look elsewhere, maybe a fan. Mine are installed using the rubber bushings provided with my heavily sound insulated Fractal Design case. If one doesn't have these bushings or grommets, can be found in a bulk back at most any local hardware store. Just carry the screw intended for installing, can match with one that fits the screw well. Ideally one which has a groove in the middle to place in the mounting hole, may have to wet to slide into place (I use saliva, works great!). This absorbs any vibration & also helps to protect the WD Gold or any HDD. BTW, these drives are rated for 550TB writes per year, a factor in my purchase decision. I have zero regrets as to purchasing the WD Gold, only $5 more & 2x the cache versus the same sized WD Black. In summary, I cannot recommend the WD Gold enough to anyone who wants a long lasting, quality HDD.

Do the wd gold 4tb enterprise drives come with screws for mounting?

NO. None of the drives I have ever received from WD or Seagate ever came with screws. I have plenty on hand from old junk chassis. You should be able to obtain the size you need for your particular project from a hardware store.

Is this a component drive or retail kit? what is the actual warranty provided for this product?

Component drive shipped in brown WD protective box, which prevents it from shifting during shipment. My two has a white label on the lid with model, serial number, UPC & quantity (usually 1). You should retain this box & contents at least for the length of warranty, also a useful place to store backup drives used in a docking station. Since most IT departments, PC builders & shops has the needed accessories on hand, this saves $15 or more (dependent on size) of drive cost. Cables & screws are low in cost & can be found often on promo. Many PC cases will ship with screws for HDD install, and some business models has an extra set hidden behind a blank bezel , where a 2.5" accessory is usually mounted. Warranty is 5 years if purchased new & I highly recommend to check serial number on the WD site before installing. If less than 5 years, either the HDD is of previous gen, or has been previously registered (used). It's also possible that the warranty began when shipped to the Seller, if only a few months, no big deal. This is why it's best to purchase current gen HDD's to ensure the most warranty. A drive can be new (unused), yet has been sitting in a warehouse for several years & WD's warranty expires. If not sold direct from Amazon or other large supplier, be sure to check Feedback of Marketplace Seller. Some may provide their own warranty, yet unless price is substantially reduced to reflect the reduction, best to look elsewhere. Be sure to ask questions before purchase, preferably with an email confirmation, to ensure of this. There's usually a low cost option for a SquareTrade 3 or 4 year warranty (based upon price) which can be added to purchase, otten less than $5 through Amazon.. Which more than pays for itself if the need to ship back arises, many OEM's requires the consumer bear this price. SquareTrade protection ensures the item is returned at no charge, will send an email with label to print & they do the rest within 5 business days. I purchase the extra protection for the shipping benefit alone, plus no haggling with an OEM, if they can't repair the item, will refund purchase price in full. Gets no simpler than that & still costs less than purchasing a retail drive.

Hard Drive	4 TB Raid
Brand	Western Digital
Series	Gold
Item model number	WD4002FYYZ
Hardware Platform	PC; Mac; Linux
Item Weight	1.58 pounds
Product Dimensions	5.79 x 4 x 1.03 inches
Item Dimensions LxWxH	5.79 x 4 x 1.03 inches
Color	Gold
Flash Memory Size	4
Hard Drive Interface	Serial ATA-600
Hard Drive Rotational Speed	7200 RPM
Manufacturer	Western Digital Bare Drives
ASIN	B01AV1697A
Is Discontinued By Manufacturer	No
Date First Available	April 19, 2016

WD Gold 4TB Enterprise Class Hard Disk Drive - 7200 RPM Class SATA 6 Gb/s 128MB Cache 3.5 Inch - WD4002FYYZ

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