P45 slower than I965 ??

[PuijkeN]

:confused:

After switching from an Asus P5B with 965 chipset to a newer Asus P5Q with P45 chipset I'm surprised to see that performance is much lower at same settings... :confused::confused::shrug:
I didn't really expect this because the board and chipset is newer, I would have expected at least equal performance.

I'm running E6600 at 367*9 ~ 3,3 Ghz with some Corsair TWINX2 2x2gb CL5 PC6400 memory running at 920mhz DDR (5-5-5-18). This was my daily setup on P5B and would be continued on the P5Q.

The problem is that on performance there seems to be something wrong. Fresh installations of Vista give me roughly 500mb/s less memory bandwith with Everest. Also when running 3DMark2001 the score seems to be about 2000 points lower. :shocked:

Anybody who could provide me some tips for this motherboard? I've searched the forum but the P45 threads aren't clearing things up that much for me.



My settings are:

Ai Overclock Tuner: MANUAL
CPU Ratio Setting: 9
FSB Freq: 367
PCIE Freq: 100
FSB Strap to NB: AUTO
DRAM Freq: DDR2-920Mhz
DRAM Timing Control: AUTO (verified settings with P5B and timings seem to be same)
DRAM Static Read: AUTO
DRAM Read Training: AUTO
MEM OC Charger: AUTO
Ai Clock Twister: AUTO
Ai Transaction Booster: MANUAL
Common Performance Level: 08
Pull-In CHA PH1 - 8: ALL DISABLED

CPU Voltage: 1,32
CPU GTL Ref: AUTO
CPU PLL Voltage: 1,5
FSB Termination Voltage: 1,2
DRAM Voltage: 2,02
NB Voltage: 1,1
SB Voltage: 1,1
PCIE SATA Voltage: 1,5

Load-Line Calibration: AUTO
CPU Spread Spectrum: Disabled
PCIE Spread Spectrum: Auto
CPU Clock Skew: AUTO
NB Clock Skew: AUTO

Am I missing something here? :shrug:
It's a nice board tough, almost no Vdroop straight out of the box. Had to mod the P5B to get to same result!

Anyone who could help me find lost perfomance back thanks!

[Leeghoofd]

First warning : do NOT put the chipset voltages to AUTO or the lowest value... I had overvolting on my P5Q-E and 2 Dlx boards, I suspect the vanilla is the same

CPU Voltage: 1,32
CPU GTL Ref: AUTO
CPU PLL Voltage: 1,5 --> TRY 1.56
FSB Termination Voltage: 1,2
DRAM Voltage: 2,02
NB Voltage: 1,1 --> TRY 1.2
SB Voltage: 1,1
PCIE SATA Voltage: 1,5


DRAM Static Read: AUTO --> TRY ENABLED

Ai Clock Twister: AUTO --> TRY MODERATE or LIGHT

Pull-In CHA PH1 - 8: ALL DISABLED --> YOU CAN TRY TO ENABLE THEM (but this function does not work on all P5Q series mobos/biosses)

try to play with these (one at a time):

on my quad : static read control enabled gave me a nice boost in bandwith and drop in latency (for other people it did nothing), try Clock twister to Moderate (if it will run with ya rams), could require some more NB voltage

P45 is a FSB hog and loves it... but I could compare it to my P35 mobo which was clock for clock a bit faster... my 975 was also faster than the 965 clock for clock... butthe higher FSB made up for it...

[PuijkeN]

Okay thx for the information! :)

Will try this as soon as possible..

Yeah I read never to set the voltages on auto, I've OC'ed it first to 3.0 Ghz with everything set to auto, saw that the cpu was already getting 1.4V so that wasn't good.

So actually I should try raising the FSB which should get me some more performance? :)

[Leeghoofd]

I don't recall exactly but wasn't it from 401FSB that the 965 changed to a slower strap, so we all booted with a low FSB in bios and then used setfsb or such to force FSB to get better performance...

Tr to get 400FSB mate that would rock or even 450FSB with 8 multi (but no idea if ya ram can handle that) sad thing with P45 is with 1:1 divider you can only take a pretty high PL for the ram... this mobo mate with some good 1000-1066Mhz ram or so will allow you to choose a lower Pl level so increasing ram bandwith... to get best performance out of P45 you need to be able to run a divider ( so the ram at a higher speed then the FSB)

Read up on the tests we did at I4memory :

Chispie's p5q-deluxe (http://i4memory.com/f54/asus-p5q-deluxe-p45-6620/)