ChocBurmese Posted June 2, 2013 Share Posted June 2, 2013 Hi guys. This is my first post. I have set BIOS to AHCI, but still getting slow write speeds. I'm using Windows 7 Home Premium Drive: Corsair Pro 256GB Computer Specs: RAM: 16GB; Motherboard: ASUS P8B75-M Processor: Intel i7 3770 Results are as follows using CrystalDiskMark 3.0.2 X64 5 1000MB C: 39% (94/238GB) Seq Read: 489.6 Write: 65.10 512K Read: 374.6 Write: 61.75 4K Read 31.19 Write: 3.089 4K QD32 Read: 280.5 Write: 36.99 I have tweaked the OS a fair bit, but nothing has worked. I haven't changed settings in BIOS for C1 stepping etc. I figured there was a problem that needed fixing first if my read speeds are so slow. Please let me know if there is more info you need and anything I can do. Thanks ChocolateBurmese Link to comment Share on other sites More sharing options...
Toasted Posted June 2, 2013 Share Posted June 2, 2013 Run an ATTO benchmark and post a screenshot. Link to comment Share on other sites More sharing options...
ChocBurmese Posted June 2, 2013 Author Share Posted June 2, 2013 Hi. Thanks for your reply! Please find attached the results of the ATTO benchmark results. Thanks!Untitled.pdf Link to comment Share on other sites More sharing options...
Toasted Posted June 2, 2013 Share Posted June 2, 2013 The ATTO benchmark results are not normal. Disable the CPU power saving features in the BIOS and see if that helps. Have you tried a different SATA data cable? Latest BIOS and chipset drivers? Link to comment Share on other sites More sharing options...
ChocBurmese Posted June 2, 2013 Author Share Posted June 2, 2013 I have used a program to update all my drivers. As far as I am aware, I have the latest drivers for all my hardware. I also disabled any power saving features in the BIOS. There has been no change in the results. Tomorrow I will purchase another SATA 3 cable and see if there is any difference. Link to comment Share on other sites More sharing options...
Incriminated Posted June 2, 2013 Share Posted June 2, 2013 Looks like a BIOS-Bug to me. Your read-rates are overall alright, but your write-rates are pretty messed up overall. 1. Could be a damaged cable indeed 2. See if ASUS got newer UEFI/BIOS, if yes upgrade. 3. Try the SSD on another mashine, when write-rates are still messed up you have to RMA the drive, if it is ok, then you have to refer to ASUS-Support to get a new UEFI/BIOS. 4. Another possible reason could be your HDD interferring somehow, so try to unplug that and repeat benchmark. Link to comment Share on other sites More sharing options...
ChocBurmese Posted June 2, 2013 Author Share Posted June 2, 2013 Hi. I have updated drivers and re-run the tests. The write ability has increased, but the read has decreased.latest results.pdf Link to comment Share on other sites More sharing options...
ChocBurmese Posted June 3, 2013 Author Share Posted June 3, 2013 Hi. I discovered that when I updated the BIOS the AHCI setting changed to IDE by default. Therefore when I ran the last ATTO benchmark I did so with IDE set in BIOS instead of AHCI. I have now changed it back to AHCI and I have better results with my SSD (Corsair Pro 256GB). I think the results are pretty normal now. Please check them out and tell me what you think. Regards, Choc.Final #2.pdf Link to comment Share on other sites More sharing options...
Toasted Posted June 3, 2013 Share Posted June 3, 2013 The ATTO results are much better. Advertised speeds for the Performance Pro 256GB; Max Sequential R/W (ATTO) Up to 515 MB/s sequential read 440 MB/s sequential write Source: Corsair Link to comment Share on other sites More sharing options...
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