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I just bought a new SSD, and installed a fresh copy of Windows on it. I didn't see any noticeable difference in boot times, app start-up times, so I decided to benchmark it.

  • Asus P7P55D-E
  • Intel i5-760
  • Samsung 830 256GB SATA III
  • Windows 7 Ultimate 64-bit

The Windows experience index gave the drive a 7.3 rating, but real-world performance is not particularly impressive.

ATTO AS SSD Samsung SSD Magician

Any ideas why the numbers are so low?

UPDATE:

It turns out that SATA III support is turned off by default on the P7P55D motherboard. After enabling it in BIOS (Tools -> Level Up), the scores went up:

      Read  Write
Seq   325   183
4K    16    49
IOPS  32K   28K

It's an improvement, but still far below what they should be for this drive.

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What is low about these numbers? Doing random 4K IOps on a 15K RPM SAS drive yield speeds in the single digit MB/sec. Your drive benchmarks those at 12MB/sec. A order of magnitude faster. (Ignore the sequential stuff). –  Hennes Nov 29 '12 at 7:49
    
samsung.com/us/computer/memory-storage/MZ-7PC256D/AM-specs. Go check the advertised specs for this drive. There are plenty of reviews and benchmarks that back up those numbers. And why are you comparing an SSD to a HDD? –  alekop Nov 29 '12 at 8:11
    
Yes, the SATA bus in AHCI mode. And the mobo supports SATA III (though these numbers are kind of slow even for SATA II). –  alekop Nov 29 '12 at 8:34
    
@alekop Yeah I just noticed in the screenshot you're using msachi. I agree your numbers are low for that drive, the WEI is too. –  Louis Nov 29 '12 at 8:36
    
How is the partition aligned? –  Hennes Nov 29 '12 at 8:41
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