P4C800E-D & only 75% on Sandra (buff'd) BW?

[i_m_weasel]

When I test with Sandra (buffered) I get about 75% efficiency (4899/4798 or something along those lines). I was wonderinf if 75% is decent, or do I have something misconfigured on my mobo? The RAM I have is rated for 2-2-2-5 @ 200MHz. Currently my system (see my sig below) has only the OCZ memory installed.

Currently I have most things on auto (I do have legacy USB support disabled) except

AI Overclock Tuner - Standard

Performance Mode - Turbo

Config DRAM Timing Speed - Disable
DRAM CAS# Latency (CAS) - 2
RAS# Precharge (TRP) - 2
DRAM RAS# to CAS# Delay (TRCD) - 2
DRAM Precharge Delay (TRAS) - 5
Burst Length - 8

Memory Acceleration Mode - Auto
DRAM Idle Timer - Auto
DRAM Refresh Rate - 7.8 uSec

Graphics Adapter Priority - AGP/PCI
Graphics Apature Size - 128
Spread Spectrum - disable
ICH Delayed Transaction - enable

CPU-Z shows FSB : DRAM is 1:1 (FSB=200) and Performance Mode is enabled (both as expected).

So, would having ICH Delayed Transaction DISABLED speed things up? I was just wondering if there was something I had misconfigured and could get something higher than 75% efficiency.

[Larkspur]

Your PC-3200 mem has a THEORETICAL bandwidth of 6400mb/sec and you're getting around 4800mb/sec. 4800 divided by 6400 gives you 75%. That's all that really means. For PC3200 running at default speed (400mhz) which is where you're at, 4800mb/sec is perfectly normal. No one ever reaches full theoretical bandwidth because of various reasons that I don't know enough to discuss. As far as changing your settings, everything looks great from what I see.
Read this if you're interested in ICH delayed transaction:

http://www.rojakpot.com/default.aspx...var1=0&var2=77

[i_m_weasel]

Understood. But kind of along the lines of not knowing enough (thats me!!), I thought maybe I was missing something or had 2 settings that actually were at odds with each other, or something like that.

Concering PCI Delay Transaction, at Rojak it says

It is highly recommended that you enable PCI Delay Transaction for better PCI performance and to meet PCI 2.1 specifications.

but I have seen posts where people recommend disabling it. I didn't know if it was better enabled on lower-end systems and it was actually better to have disabled on higher-end systems, or some such logic that is way beyond my pay grade! I was just looking some someone who lives and breathes this stuff to give my configuration/setup a look-see and point out any glaring problems/conflicts. I am quite happy with the performance of my system as is.

[NODES]

take out either Dual channel ram (2 sticksx512) and that will improve your scores by a large number....

when u have all 4 slots filled on the asus mobo, it turns performance mode OFF

[specmike]

Originally Posted by NODES

take out either Dual channel ram (2 sticksx512) and that will improve your scores by a large number....

when u have all 4 slots filled on the asus mobo, it turns performance mode OFF

He posted above that he only has the OCZ installed. And, you don't lose PAT with 4 sticks unless you OC.

Mike.

[i_m_weasel]

My scores were very similar with 2 or 4 sticks of RAM. And yes, CPU-Z did confirm I am in dual channel mode and have performance mode enabled. I'm not O/C'ing and just wanted to maximize the performance of my stock system - since I have decent components in it.