Memory Bandwidth and A8N SLI Deluxe

[Scunner]

I recently bit the bullet and upgraded my P4 3.06 to the following:

Asus A8N SLI Deluxe
Athlon 64 3800+ (Newcastle)
Asus GeForce 7800 GTX
1GB Samsung DDR 400

Naturally, I ran a bunch of benchmarks as soon as it was up and running and was less than impressed with the memory bandwidth.

Sandra reports 2648 MB/s Int, and 2650 MB/s Float. Comparing that against a K8T890 chipset, it reports 5091 and 5085 respectively.

Everest reports Memory Read at 2979 MB/s and Write at 1083 MB/s. The benchmarks for a 3500+ at 2200MHz are more than double what I'm getting.

The memory timings on the Samsung are 3-3-3-8. The 3500+ rating uses 2-2-2-5 RAM.

So, my question is: if I replace the Samsung with something with better timings, will my memory bandwidth increase? Is there anything in my BIOS that I should check before pulling the memory?

Thanks.

[HOT1]

I recently bit the bullet and upgraded my P4 3.06 to the following:

Asus A8N SLI Deluxe
Athlon 64 3800+ (Newcastle)
Asus GeForce 7800 GTX
1GB Samsung DDR 400

Naturally, I ran a bunch of benchmarks as soon as it was up and running and was less than impressed with the memory bandwidth.

Sandra reports 2648 MB/s Int, and 2650 MB/s Float. Comparing that against a K8T890 chipset, it reports 5091 and 5085 respectively.

Everest reports Memory Read at 2979 MB/s and Write at 1083 MB/s. The benchmarks for a 3500+ at 2200MHz are more than double what I'm getting.

The memory timings on the Samsung are 3-3-3-8. The 3500+ rating uses 2-2-2-5 RAM.

So, my question is: if I replace the Samsung with something with better timings, will my memory bandwidth increase? Is there anything in my BIOS that I should check before pulling the memory?

Thanks.
I went from 4700 to 5680[2225@200] just by enabling bank interleave see if your M/B has this setting. The timing is low for DDR400 that`s more like DDR 500 timing.
p.S. is that dual-channel.

[Scunner]

No, it was single channel, and the reason for the low scores. I borrowed a pair of Mushkin DDR400 (2-3-3-6) and the scores doubled as expected. I'll put this down to my ignorance of new hardware (been stuck with 4 year-old hardware!) and the sales assistant who told me that dual channel had no advantages over single channel.

I don't see anything in the bios about bank interleave, but I'm happy with the increase in bandwidth.