Exact 8TB WD Red Plus comparison
WD80EFPX vs WD80EFZZ
Compare the two current 8TB WD Red Plus CMR models by transfer rate, cache, power, acoustics and price before selecting drives for a NAS array.
Specifications reviewed August 2, 2026 · Amazon US offers where relevant · Verify exact model and compatibility
Quick answer
Which one should you choose?
Choose WD80EFPX at similar prices. Both are 8TB CMR Red Plus drives rated for up to eight bays, 180TB/year and a three-year warranty, but WD80EFPX is rated up to 215MB/s with 256MB cache versus 185MB/s and 128MB for WD80EFZZ. WD80EFPX also has lower cited read/write and idle power. WD80EFZZ only becomes compelling when its verified new-drive price is materially lower.
WD Red Plus WD80EFPX
A current 8TB Red Plus choice balancing 215MB/s rated transfer, 256MB cache and lower power than older high-RPM 8TB revisions.
WD Red Plus WD80EFZZ
An 8TB Red Plus revision that remains CMR and NAS-rated, but is usually less attractive than WD80EFPX unless its checkout price is meaningfully lower.
Verified specifications
WD80EFPX and WD80EFZZ specifications
| Specification | WD Red Plus WD80EFPX | WD Red Plus WD80EFZZ |
|---|---|---|
| Capacity | 8TB | 8TB |
| Recording technology | CMR | CMR |
| Drive design | Air | Air |
| Interface | SATA 6Gb/s | SATA 6Gb/s |
| RPM | 5,640 | 5,640 |
| Internal transfer rate, up to | 215MB/s | 185MB/s |
| Cache | 256MB | 128MB |
| Read/write power | 5.2W | 6.2W |
| Idle power | 3.4W | 4.1W |
| Idle acoustics | 24dBA | 25dBA |
| Seek acoustics | 28dBA | 30dBA |
| Workload rating | 180TB/year | 180TB/year |
| MTBF | 1 million hours | 1 million hours |
| Warranty | 3 years | 3 years |
Specifications apply to the exact cited models or current family data sheets. Retail stock can include older revisions, regional suffixes and seller-created titles.
Current offers
Compare current offers for the models in this guide
Retail listings can combine capacities, revisions and conditions. Confirm the exact model number, seller, warranty region and final checkout price.
Interactive decision tool
Exact-model decision helper
Choose whether this is a new array or a replacement, then set your priority. Matching an existing array can be more important than choosing the newest revision.
WD80EFPX is the stronger current specification
WD80EFPX and WD80EFZZ can look interchangeable in a retail filter because both are 8TB, 3.5-inch, SATA, CMR WD Red Plus hard drives. The current Western Digital data sheet shows meaningful differences beneath those shared labels. WD80EFPX is rated at up to 215MB/s and carries 256MB of cache, while WD80EFZZ is rated at up to 185MB/s with 128MB of cache.
The EFPX model also has the lower published power figures: 5.2 watts during read/write and 3.4 watts at idle, compared with 6.2 watts and 4.1 watts for EFZZ. The acoustic figures follow the same direction, with EFPX listed at 24dBA idle and 28dBA seek versus 25dBA and 30dBA. No single figure guarantees a quieter real installation, but the complete specification set favors EFPX.
That does not make WD80EFZZ defective or unsuitable. It remains a current Red Plus CMR model in the same workload and warranty class. It becomes a rational purchase when it is substantially cheaper, is the exact model validated for an older NAS, or is needed to match an existing array. At an equal price, however, the newer specification profile of EFPX is easier to recommend.
Both models avoid the main SMR concern
The most important shared specification is CMR. Western Digital’s current Red Plus data sheet lists both models as conventional magnetic recording drives. That makes them more appropriate than device-managed SMR drives for sustained random writes, RAID rebuilds and ZFS resilvering, where long periods without idle time can expose the limitations of SMR background management.
The CMR label does not mean the drives will perform identically. It describes the recording method, not cache size, platter layout, firmware, acoustics or sequential transfer rate. Buyers should therefore verify both the family and the model number. A product page that says only “WD Red 8TB” is not precise enough to establish whether the drive is Red, Red Plus, Red Pro, SMR or CMR.
Check the label or listing for WD80EFPX or WD80EFZZ. Do not infer the model from a stock image, review count or capacity selector because marketplace pages often combine multiple revisions and conditions.
Will the faster rating matter on your network?
A single 1GbE client usually cannot exploit the full sequential capability of either drive. After protocol overhead, the network link normally becomes the bottleneck before a healthy drive reaches its rated maximum. For a basic two-bay backup NAS serving one user, the difference between 215MB/s and 185MB/s may be difficult to see in ordinary file copies.
The gap becomes more relevant in arrays, with multiple clients, during rebuilds, with 2.5GbE or 10GbE, and when the NAS performs local tasks that are not limited by the network. A four-drive RAID can aggregate throughput, while scrubs and rebuilds move large amounts of data inside the enclosure. Even then, real performance depends on drive position, fill level, filesystem, RAID mode and workload.
Treat the transfer rating as an advantage rather than a promise. It is one reason to favor EFPX when prices are close, but it should not override compatibility, seller quality or the need to match an existing array.
Power differences multiply across an always-on array
The one-watt read/write and 0.7-watt idle advantage for EFPX looks small until it is multiplied by the number of drives and operating hours. In an eight-drive system, the cited idle difference alone is 5.6 watts before power-supply losses. Over several years, lower draw also means less heat for the enclosure fans to remove.
Actual energy use changes with workload, head parking, standby policy, temperature and NAS firmware. The data-sheet figures are comparison points under stated test conditions, not a household electricity forecast. Still, when one drive is both faster and lower-power on paper, the slower model needs a meaningful price or compatibility advantage to compensate.
Avoid aggressive sleep settings solely to reduce energy. Frequent spin-up cycles can add latency and wear, and some NAS workloads keep disks active regardless of the configured timer. Choose a balanced system policy and measure the complete NAS at the wall if operating cost is important.
Acoustic ratings do not tell the whole story
WD80EFPX has slightly lower cited idle and seek acoustics. The two-decibel seek difference can matter when several drives operate together, but chassis resonance may dominate. A rigid metal tray, a hollow cabinet or a lightweight desk can amplify low-frequency vibration in ways a laboratory dBA value does not predict.
For a NAS near a bedroom, studio or living area, prioritize a well-damped enclosure, healthy fans and a stable surface. Do not place foam where it blocks ventilation. In a utility room or rack, the acoustic difference may be less important than current price and the time required to replace an existing drive.
A sudden new clicking, grinding or repeated spin-up pattern is not normal “NAS noise.” Back up accessible data and investigate the drive and enclosure rather than assuming the louder model is behaving as designed.
Matching an existing array can outweigh the specification win
An array built with WD80EFZZ does not need to be replaced simply because WD80EFPX has stronger specifications. Many NAS systems can rebuild onto a different 8TB compatible drive. The array will still be limited by the smallest capacity, and mixed performance can be influenced by the slowest member and controller behavior.
For a replacement, first check the NAS compatibility list and the minimum replacement size. A nominal 8TB drive from another model can have slightly different reported sector counts, so follow the NAS vendor guidance rather than relying only on the front-label capacity. Back up before starting a rebuild and replace only one failed drive at a time unless the vendor procedure says otherwise.
For a brand-new array, using identical models simplifies firmware tracking, spare management and performance expectations. If EFPX is available from a reputable seller at a similar price, it is the cleaner starting point.
How much cheaper should WD80EFZZ be?
There is no universal dollar threshold because the answer changes with drive count and workload. Calculate the total array difference. A twenty-dollar gap becomes eighty dollars in a four-drive build and one hundred sixty dollars in an eight-drive build. Decide whether the EFPX speed, cache, power and acoustic advantages are worth that total rather than judging one drive in isolation.
Also compare condition and warranty. A cheap EFZZ offered as used, renewed or recertified is not equivalent to a new EFPX with a clearly valid regional warranty. Marketplace review counts can combine conditions and models, so inspect the seller and selected option before checkout.
When the total gap is small, buy EFPX. When EFZZ creates a substantial verified saving and the NAS is limited to 1GbE with a light workload, the older performance profile may still be adequate.
Final buying checklist
Confirm the exact model number, new-drive condition, warranty region and seller. Check the NAS compatibility list and whether the enclosure supports the drive’s capacity. Make sure the listing is a bare internal SATA drive rather than an enclosure, accessory or recertified product hidden in a variation selector.
For a new build, compare price per terabyte and total RAID cost. For a replacement, prioritize compatibility and a safe rebuild over theoretical benchmark differences. Keep a backup because RAID repair is a high-stress period for the remaining disks.
WD80EFPX is the default choice at near-equal pricing. WD80EFZZ is the value alternative only when the discount is large enough to justify lower rated transfer, smaller cache and higher cited power.
Official specifications used
Manufacturer specifications can change by exact model and region. These sources were used for the factual comparison.
Frequently asked questions
Are WD80EFPX and WD80EFZZ both CMR?
Yes. Western Digital lists both current 8TB Red Plus models as CMR.
Which model is faster?
WD80EFPX is rated up to 215MB/s, compared with 185MB/s for WD80EFZZ.
Which model uses less power?
The cited data sheet lists WD80EFPX at 5.2W read/write and 3.4W idle, lower than WD80EFZZ at 6.2W and 4.1W.
Can I replace WD80EFZZ with WD80EFPX in a RAID?
Many NAS systems can rebuild onto a compatible 8TB EFPX, but confirm the exact NAS compatibility list, replacement-size rule and backup before beginning.
Do both drives have the same warranty?
The cited current data sheet lists a three-year limited warranty for both, subject to regional terms.
Is WD80EFZZ worth buying?
It can be worth buying when it is materially cheaper, matches an existing validated array or is specifically listed for the NAS. At similar prices, WD80EFPX has the stronger specification.
Methodology and disclosure
Cloudzat separates standard, Pro, capacity and exact-model results; excludes obvious accessories and SSDs; and does not apply one revision’s RPM, noise or power specification to an entire family. Price data comes from the existing Cloudzat catalogue when a compatible source is available.
As an Amazon Associate, Cloudzat may earn from qualifying purchases. Affiliate links use sponsored and nofollow attributes. The commission does not change the buyer’s price.