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Post Date: 05-15-2012 10:42 am
Slow transfer speeds Sy-PEX40032
Join Date: 05-15-2012
Total Posts:1


Hello, I have the sy-pex400032 with the drivers from the product webpage. The reason for this message is to request help with slow transfer speeds. Since this is a 1x card, will my M4 RAID 0 always have test scores like this? Youtube videos show two M4 RAID 0 drives reaching much higher http://www.youtube.com/watch?v=WuescKED8qA        http://www.youtube.com/watch?NR=1&feature=endscreen&v=S5ZrBM_EPC8
CrystalDiskMark 3.0.1 x64 (C) 2007-2010 hiyohiyo
                           Crystal Dew World : http://crystalmark.info/
* MB/s = 1,000,000 byte/s [SATA/300 = 300,000,000 byte/s]
           Sequential Read :   349.992 MB/s
          Sequential Write :   230.710 MB/s
         Random Read 512KB :   297.654 MB/s
        Random Write 512KB :   207.139 MB/s
    Random Read 4KB (QD=1) :    18.541 MB/s [  4526.5 IOPS]
   Random Write 4KB (QD=1) :    34.550 MB/s [  8435.0 IOPS]
   Random Read 4KB (QD=32) :    81.120 MB/s [ 19804.6 IOPS]
  Random Write 4KB (QD=32) :    81.532 MB/s [ 19905.3 IOPS]
  Test : 1000 MB [C: 31.6% (36.7/116.1 GB)] (x5)
  Date : 2012/05/15 13:20:05
    OS : Windows 7 Ultimate Edition SP1 [6.1 Build 7601] (x64)
My system specs are as followed.
AMD Phenom II x4 965BE
4x2 DDR-3 1600Mhz OCZ BE RAM
2x RAID 0 Crucial M4 128GB drives, partitioned once. 
2x RAID 0 Samsung 128GB drives w/firmware update to support TRIM, partitioned once.
2x RAID 0 Segate 7200.11 1.5TB drives, partitioned several times.
2x Sapphire HD 6950 2GB dual fan w/BIOS switch, X-fired 
Cooler Master HAF 932  
H50 CPU Cooler, + additional fan push/pull
Windows 7 64_bit w/all updates, latest drivers
Post Date: 05-16-2012 05:10 pm
# 1
By Tech_UTT Join Date: 04-18-2012 Total Posts: 7

Hey Alex,


The card is not particularly slow. It has simply reached its real world limits because PCI-E x1 v1.0 caps at 250mbs or v2.0 caps at 350-450mbs

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