Will switching from the MB IDE channels to a controller card increase performance in my case?

[nebula]

I have a MSI KT4 Ultra mobo with two hard drives on IDE channel1. One is a 60 gig 2mb cache, the other is a 80 gig 8mb cache with a 20 gig OS partition. Will I see any performance increase if I move to a EIDE controller card? My initial thought is no, but I have a choice of a free SIIG or Promise ATA100 controller card. I ran this Sandra benchmark on the 20 gig partition:

Test Status
SMP Test : No
Total Test Threads : 1
SMT Test : No
Dynamic MP/MT Load Balance : No
Processor Affinity : No
Windows Disk Cache Used : No
Use Overlapped I/O : Yes
Command Queue Depth : 4 command(s)
Test File Size : 511MB
File Server Optimised : No

Benchmark Breakdown
Buffered Read : 85 MB/s
Sequential Read : 38 MB/s
Random Read : 6 MB/s
Buffered Write : 88 MB/s
Sequential Write : 39 MB/s
Random Write : 13 MB/s
Average Access Time : 8 ms (estimated)

It's been a while since I've visited this topic. Am I mobo limited or HD limited?

 

[nebula]

I 'spose I could always just try it...

 

[zephyrprime]

It'll be a little slower.

 

[ElFenix]

no, the hard drives aren't on the PCI bus in most new chipsets, so they'd be sharing that if they were on a controller card and whatever additional latency goes along with it

 

[nebula]

OK, makes sense. So really the only reasons to have a controller are:

1) You have an older chipset
2) You have a hard drive size that the BIOS won't support
3) You've used all your IDE spots on the mobo

thanks for the responses