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Laptop and Encryption

post #1 of 5
Thread Starter 
Hey guys,

I have looked around the Net and have not found an answer to a rather important question I have. Basically I am looking to Fully Encrypt my Laptop HDD for security purposes (Obviously) and I would like to know the real world impact on hard drive performance by doing so. My CPU has hardware support for AES with AES NI (Corei5 SandyBridge) so I know that will alleviate the need for encryption to be done on a slower software level. However at the same time I do not want my laptop to become tedious to work with or play some games on.

Have any of you leaped into hardware accelerated encryption ? If so what are the drawbacks performance wise ?

I would love to hear some first hand opinions, or any benchmark comparisons between non encrypted and encrypted if any of you have web sources.

Cheers guys. smile.gif
post #2 of 5
Just from my very basic knowledge on encryption, full-disk encryption slows down performance by an amount enough that's unfortunately noticeable compared to no encryption at all. The general estimate is usually about ~20% performance loss / slowdown.

As far as I know, you can run a benchmark within Truecrypt. This will give you a rough estimate as to what your performance is going to be with your entire disk encrypted.

All in all, the slowdown is different for everyone as it really depends on your components: speed of the disk, processor speed, RAM, etc.

Hope that's some info you were looking for smile.gif
post #3 of 5
Thread Starter 
Thanks.

I use Encryption, just not on an Entire OS level. I expected that there would be some performance degradation due to the nature of encryption but wondered how much so even with Hardware accelerated Encryption. Yeah I have tried the Benchmark in True-Crypt but for some reason it crashed, I will re-install and try again.

Just as an Insight the hardware is as follows that will effect Encryption speeds:

HDD : Hitachi 7200RPM 16mb cache
RAM: 8GB DDR3-1333
CPU: Core i5 2430M (SandyBridge) with AES NI.

Any other info or opinions guys ?
post #4 of 5
I have an T420, i5 2520 with the AES NI, 8GB RAM and an 500GB Seagate hybrid disk. Did some benchmarking with CrystalDisk before and after encryption the whole drive with bitlocker, and I noticed about 5-8% difference in read/write speeds.
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APRIL
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TERRA
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CPUMotherboardGraphicsRAM
Intel Core i5 2540M 41786VU nVidia Optimus (NVS4200 1GB & HD3000) 8GB Mushkin 
Hard DriveOSMonitorMonitor
Seagate Momentus XT W8 x64 14" 1600x900 TFT HD+ LED 3 x 22" BenQ 1080p LED 
OtherOther
MiniDock Series3 PLUS  9cell 
CPUMotherboardGraphicsRAM
Intel Core i7 930 Gigabyte X58-UD3R HD5770 Mushkin 32GB 
Hard DriveCoolingOSPower
Seagate 7200.11 Dynatron G-950 WS8 - HyperV Tacens Radix IV 700W 
Case
3R systems R910 
CPUMotherboardRAMHard Drive
Intel Q6600 Gigabyte EP45T-UD3LR Mushkin 8GB DDR3 2x500GB R0 OS / 10x1.5TB R5 Storage 
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3xScythe GentleTyphoon High RPM  WS8 - Fileserver 2x650W Inter-Tech 3R systems R910 
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post #5 of 5
As you say, SB includes AES instruction sets, and if you format the disk with purely AES encryption, there will be zero noticable performance hit.

I have two PCs with SB chips with full disk encryption, and I don't know why everyone doesn't use it.

Oh, and if the AES benchmark worked for you, you would notice a fundementally massive performance difference between AES and the others due to the native support.
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Intel 2500k 4.7GHz  Asus P8P67 Pro(B3) 2 x Club3D 280X 3GB 16GB g.skill 1600MHz C9 
Hard DriveHard DriveHard DriveHard Drive
Samsung 840 Pro 256GB 4 x 2TB Barracudas in RAID10 2 x WD Blue 1TB RAID0 2 x 3TB Seagate Barracuda 
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8 x 146GB HP 10k SAS - various RAID levels RAID Controller LSI 9260-8i 512MB LiteOn IHAS124 Noctua NH-D15 
OSMonitorMonitorMonitor
8.1 Enterprise Acer GD245HQ (120hz) LG W2420P LG IPS231P 
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HP ZR24w LG 32LH3000 (w/IPS) Razer Blackwidow Antec TruePower New 750W 
CaseMouseAudioAudio
Corsair 750D Modified original G5 Asus Xonar PCIe Sennheiser HD595 
AudioAudioAudioAudio
Tannoy Mercury 5 NAD C165BEE Bowers & Wilkins 683 Cambridge Audio DACMagic+ 
CPUCPUMotherboardRAM
Intel® Xeon® Processor E5-2630 v3 (20M Cache, 2... Intel® Xeon® Processor E5-2630 v3 (20M Cache, 2... Lenovo RD650 128GB DDR4 ECC REG 
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