Perc 5i Performance issues

[Ravynmagi]

Having some performance concerns with my Perc 5i.

This is with the latest LSI firmware, BBU installed, Windows 7.

I've played with just about every configuration setting and nothing seems to help. Any ideas?

 

[Ravynmagi]

I think I know what is going on. I checked CPU-Z and GPU-Z and they both report my graphics card is running at x16. It's a P45 board and I have the Perc 5i in the second x16 slot. So the graphics card should be running at x8 with the Perc at x8.

So I'm guessing for some reason my P45 board is running at x16/x1 instead of x8/x8. Just not sure why that is.

The Perc 5i requires tapeing the 4th and 5th pin for some SMB fix. Could this fix be causing the card to run at x1 speed instead of x8?

 

[DD_nVidia]

Those look reasonable if its for 2 drives in a Raid 0 array. especially if they are older drives (smaller platter sizes, plus used) If they are newer drives with larger platters and caches then ... im not sure :S

My 2 x 74GB 15.5K SAS drives in Raid 0 top out at just short of 250MB/s if my memory serves me correctly and I'm just using the Perc5/i with the dell firmware. I didnt have to tape any pins on my board (x58 Asus P6T Workstation Professional) and my Graphics card is stll running at 16x.

I did have to jump through some hoops to get the Intel ICH10r, Marvel SAS controller and Dell Perc5/i to play nice but it all got working eventually apart from AHCI on the intel but thats now fixed due to a bios update (problem with the marvel controller and intels AHCI, nothing to do with the perc)