AMD Chipsets and SSD performance

[sequoia464]

I currently have a board with 790X Northbridge and an 850 Southbridge (Gigabyte 890XTA-UD3). I also use several sets of SSD's all in raid0.

My issue and question follows : with my Intel M25's and OCX Vertex2's I get results in raid0 pretty much as you would expect - they scale almost perfectly over a single drive - these are all SATA II drives. I recently got a pair of Crucial M4's that perform as they should singly while in SATA III with the 850 southbridge, but when I place them in raid0 the read results are very poor.

Is this an issue related to my chipset, or should I be looking elsewhere?

I am also looking into moving into a 900 series chipset - single graphics card. Is there any performance gain to be had with my SSD's in choosing a 950FX chipset over a 950X

 

[nenforcer]

To my understanding the 990FX chipset is just a rebranded 890FX with a couple of tweaks to the power layout / socket of the AM3+ boards to support the new upcoming AMD Bulldozer FX series chips and their advanced power / turbo states.

There should be no difference at the chipset level in your SATA ]I[ performance. Which AHCI drivers are you using for your Crucial M4 drives, the Microsoft, AMD or possibly Linux?

 

[sequoia464]

Using the AMD drivers - all drivers and bios are the most recent available.

ATTO :......... . Write....... .Read
Single Drive. ..187,280.. . 447,392
2 in raid0, ..... 373,692.... 639,132


AD SSD Single drive score = 650. . Raid0 = 746

The writes seem to scale correctly in ATTO, it is the reads that are having the issue. The AS SSD score should at least be flirting with 1000, and the ATTO reads should be over 800K in raid.

Like I said, not sure if the 790X is playing a part here or not.

The 650 AS SSD score is with raid disabled, just in AHCI - A single drive with raid enabled benches pretty badly also - score is only around 240 - the reads again are the problem.