Product comparison · 2 internal hard drives

Samsung 40GB Serial ATA II HDD, 20-PK vs Samsung 80GB Ultra-ATA/133 HDD, 20-Pk

23specifications compared
7differ
16identical
4known for one product only

Key differences

The Samsung 80GB Ultra-ATA/133 HDD, 20-Pk has 40 GB more HDD capacity than the Samsung 40GB Serial ATA II HDD, 20-PK (80 GB vs 40 GB). The Samsung 40GB Serial ATA II HDD, 20-PK has 6 MB more storage drive buffer size than the Samsung 80GB Ultra-ATA/133 HDD, 20-Pk (8 MB vs 2 MB). The Samsung 80GB Ultra-ATA/133 HDD, 20-Pk has 100,000 h more mean time between failures (MTBF) than the Samsung 40GB Serial ATA II HDD, 20-PK (600000 h vs 500000 h). Interface: Serial ATA II on the Samsung 40GB Serial ATA II HDD, 20-PK, Ultra-ATA/133 on the Samsung 80GB Ultra-ATA/133 HDD, 20-Pk.

HDD capacity
- 40GB Serial ATA II HDD, 20-PK:40 GB
- 80GB Ultra-ATA/133 HDD, 20-Pk:80 GB
Interface
- 40GB Serial ATA II HDD, 20-PK:Serial ATA II
- 80GB Ultra-ATA/133 HDD, 20-Pk:Ultra-ATA/133
Storage drive buffer size
- 40GB Serial ATA II HDD, 20-PK:8 MB
- 80GB Ultra-ATA/133 HDD, 20-Pk:2 MB
Mean time between failures (MTBF)
- 40GB Serial ATA II HDD, 20-PK:500000 h
- 80GB Ultra-ATA/133 HDD, 20-Pk:600000 h
Power consumption (typical)
- 40GB Serial ATA II HDD, 20-PK:8 W
- 80GB Ultra-ATA/133 HDD, 20-Pk:7 W
Power consumption (standby)
- 40GB Serial ATA II HDD, 20-PK:0.7 W
- 80GB Ultra-ATA/133 HDD, 20-Pk:1.5 W
Power consumption (PowerSave)
- 40GB Serial ATA II HDD, 20-PK:0.7 W
- 80GB Ultra-ATA/133 HDD, 20-Pk:1.5 W

Side by side

Differences highlightedShow differences only

Comparison of 40GB Serial ATA II HDD, 20-PK, 80GB Ultra-ATA/133 HDD, 20-Pk
27 specifications	A Samsung 40GB Serial ATA II HDD, 20-PK View product	B Samsung 80GB Ultra-ATA/133 HDD, 20-Pk View product
Features4 differ
HDD capacityDiffers	40 GB	80 GB
HDD speed	7200 RPM	7200 RPM
HDD size	3.5"	3.5"
InterfaceDiffers	Serial ATA II	Ultra-ATA/133
Storage drive buffer sizeDiffers	8 MB	2 MB
Full stroke seek time	18 ms	18 ms
Track to track seek time	0.8 ms	0.8 ms
Average seek time	8.9 ms	8.9 ms
Average latency	4.17 ms	4.17 ms
Bytes per sector	512	512
Mean time between failures (MTBF)Differs	500000 h	600000 h
Power3 differ
Power consumption (typical)Differs	8 W	7 W
Power consumption (standby)Differs	0.7 W	1.5 W
Power consumption (PowerSave)Differs	0.7 W	1.5 W
Operating voltage	5 / 12 V	5 / 12 V
Operational conditionsidentical
Operating temperature (T-T)	0 - 60 °C	0 - 60 °C
Storage temperature (T-T)	-40 - 70 °C	-40 - 70 °C
Operating relative humidity (H-H)	5 - 90%	5 - 90%
Storage relative humidity (H-H)	5 - 95%	5 - 95%
Non-operating altitude	12000	12000
Operating shock	63 G	63 G
Non-operating shock	350 G	350 G
Other featuresidentical
Special featuresKnown for one	RoHS NoiseGuard SilentSeek	Unknown — not stated by the source
Drive device, transfer rateKnown for one	300 MB/s	Unknown — not stated by the source
Internal	Yes	Yes
Power requirementsKnown for one	Unknown — not stated by the source	5V / 12V
Drive ready timeKnown for one	Unknown — not stated by the source	5 s

A dash means the value is not stated by the source. Unknown values are never counted for or against a product, and there is no overall score.

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