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Ramdisk Benchmarks

 

RAMDISK Benchmarks WIN7
(the most complete RAMDISK shootout 2009)



Test system: Nehalem Core i7 950 and 4 GByte RAM

Software OS: WIN7 32-bit (max 4Gbyte RAM)
Setup
: 2 GByte RAMDISKs from different software vendors

Hypothesis: RAMDISKs have different performance due to their implementations

License:All material, pictures can be freely reused with proper attribution (CC-by)

Author: Tobias Kind / FiehnLab 2009 / fiehnlab.ucdavis.edu

 

 

Used disk benchmark tools:

CrystalDiskMark crystalmark.info

HDTach (trial)  www.simplisoftware.com

HDTune (trial) www.hdtune.com

Atto www.guru3d.com

 

Direct IO Disks - can be mounted as virtual disk and can be used with drive letter

                          - are not seen by Windows Disk Manager or HDTune/HDTach

                          - faster than direct disk mode (SCSI)

 

Comments:     - Error may be as high as 20%;

                        - Older unsupported tools such as ATTO may have caching issues

                        - Direct IO is faster than direct disk mode

                        - Two test with two repeats, fastest result taken for table

                        - FAT and FAT32 and NTFS results mixed

 Read the full report (36 pages) absolutely for free as Adobe PDF and Office 2003 PPT or Office 2007 PPTX

For free reuse (commercial and non-commercial) please use CC-by license with proper attribution :
Author: Tobias Kind / FiehnLab 2009 / fiehnlab.ucdavis.edu


 

Ramdisk performance results for Windows 7
 
    Sequential [MB/s] Random 512k [MB/s] Random 4k [MB/s] Average (ALL)
Num Name Read Write Read Write Read Write Score
1 QSOFT Ramdisk Enterprise 5362 6460 5574 6582 1063 924 4327
2 VSuite Ramdisk (prof.) 4544 5269 4731 5247 1000 795 3598
3 Gili Ramdisk 3684 4684 4213 4857 610 541 3098
4 Virtual Hard Drive 2 Pro 4654 4006 4365 4186 719 623 3092
5 StarPort iSCSI Initiator 4441 5179 3992 4493 186 188 3080
6 SuperSpeed  RamDisk Plus  4409 4995 3995 4492 199 193 3047
7 ImDisk Virtual Disk Driver 3923 4500 3176 3556 81 63 2550
8 Cenatek Ramdisk  3215 3573 2902 3054 225 197 2194
9 RamPhantom 7 3414 3835 2717 2871 53 57 2158
10 Gavotte Ramdisk 3314 3531 454 460 4 4 1295
11 Everstrike DiskBoost  NA NA NA NA NA NA NA
12 AR RAM Disk  NA NA NA NA NA NA NA
13 StarWind iSCSI 4.0 NA NA NA NA NA NA NA
14 Moio Systems RAMDisk NA NA NA NA NA NA NA
15 Cenatek RAMDISK XP NA NA NA NA NA NA NA
16 ERAM for Windows NA NA NA NA NA NA NA
17 Microsoft KDMF/DDK NA NA NA NA NA NA NA
   
Testsystem: Core i7 @ 3.5GHz; DDR3 RAM; WIN7 32-bit; CrystalDiskmark 2.0; Error +/- 20%

  

* A fast Ramdisk or ramdrive can deliver more than 5 GByte/sec seq. throughput
* Good support and signed drivers are important; Backup option is important
* Easy installation and de-installation as well as convenient GUI are a large plus
* CPU penalty for Ramdisk use is one CPU core - due to RAMDISK and FS overhead
* Commercial and free versions can be used (performance is not ultimate measure)

 

 

 

• How about consumer SSDs? They can reach several  hundred MByte/sec but not more.

• IOPS for RAMDISKS: 30000-40000 @ 512 bytes and 4 kBytes

• How about external or PCI-X based SSDs like Fusion IO? The can reach 1000 Mbyte/sec.

• Cheapest DDR3 4Gbyte ~ 200 Dollars ; a 64 GByte RAMDISK would cost 3200 Dollar (4RAM)

• A fast SSD or disk RAID array (RAID10 or RAID6) should be used for the production system

• A small RAMDISK with few GBytes can be used when top performance is needed.

• Using a RAMDISK has a penalty of one CPU core in use due to filesystem and ramdisk overhead.

 

Read the full report for free, including installation issues, GUI pictures and more.

Check above links for PDF, PPT and PPTX material.

One last comment, please use Mozilla FireFox or Chrome for viewing, the page is FUBAR in Internet Explorer.

Thank you.