Product comparison · 2 internal hard drives

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

24specifications compared
7differ
17identical
3known for one product only

Key differences

The Samsung 40GB Serial ATA II HDD, 20-PK has 6 MB more storage drive buffer size than the Samsung 40GB Ultra-ATA/133 HDD, 20-PK (8 MB vs 2 MB). The Samsung 40GB Serial ATA II HDD, 20-PK has 0.9 W more power consumption (typical) than the Samsung 40GB Ultra-ATA/133 HDD, 20-PK (8 W vs 7.1 W). The Samsung 40GB Serial ATA II HDD, 20-PK has 0.2 W more power consumption (standby) than the Samsung 40GB Ultra-ATA/133 HDD, 20-PK (0.7 W vs 0.5 W). Interface: Serial ATA II on the Samsung 40GB Serial ATA II HDD, 20-PK, Ultra-ATA/133 on the Samsung 40GB Ultra-ATA/133 HDD, 20-PK. Operating temperature (T-T): 0 - 60 °C on the Samsung 40GB Serial ATA II HDD, 20-PK, 5 - 55 °C on the Samsung 40GB Ultra-ATA/133 HDD, 20-PK.

Interface
- 40GB Serial ATA II HDD, 20-PK:Serial ATA II
- 40GB Ultra-ATA/133 HDD, 20-PK:Ultra-ATA/133
Storage drive buffer size
- 40GB Serial ATA II HDD, 20-PK:8 MB
- 40GB Ultra-ATA/133 HDD, 20-PK:2 MB
Power consumption (typical)
- 40GB Serial ATA II HDD, 20-PK:8 W
- 40GB Ultra-ATA/133 HDD, 20-PK:7.1 W
Power consumption (standby)
- 40GB Serial ATA II HDD, 20-PK:0.7 W
- 40GB Ultra-ATA/133 HDD, 20-PK:0.5 W
Power consumption (PowerSave)
- 40GB Serial ATA II HDD, 20-PK:0.7 W
- 40GB Ultra-ATA/133 HDD, 20-PK:0.5 W
Operating temperature (T-T)
- 40GB Serial ATA II HDD, 20-PK:0 - 60 °C
- 40GB Ultra-ATA/133 HDD, 20-PK:5 - 55 °C
Drive device, transfer rate
- 40GB Serial ATA II HDD, 20-PK:300 MB/s
- 40GB Ultra-ATA/133 HDD, 20-PK:133 MB/s

Side by side

Differences highlightedShow differences only

Comparison of 40GB Serial ATA II HDD, 20-PK, 40GB Ultra-ATA/133 HDD, 20-PK
27 specifications	A Samsung 40GB Serial ATA II HDD, 20-PK View product	B Samsung 40GB Ultra-ATA/133 HDD, 20-PK View product
Features2 differ
HDD capacity	40 GB	40 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)	500000 h	500000 h
Power3 differ
Power consumption (typical)Differs	8 W	7.1 W
Power consumption (standby)Differs	0.7 W	0.5 W
Power consumption (PowerSave)Differs	0.7 W	0.5 W
Operating voltage	5 / 12 V	5 / 12 V
Operational conditions1 differ
Operating temperature (T-T)Differs	0 - 60 °C	5 - 55 °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 features1 differ
Power requirementsKnown for one	Unknown — not stated by the source	+5V / +12V
Drive device, transfer rateDiffers	300 MB/s	133 MB/s
Drive ready timeKnown for one	Unknown — not stated by the source	7 s
Internal	Yes	Yes
Special featuresKnown for one	RoHS NoiseGuard SilentSeek	Unknown — not stated by the source

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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