I also saw similar benchmark results in Windows with Sandra and the P4.
Might be something with the Motherboard. This is my first MSI motherboard and I'm not terribly impressed by it.
The bios date shows 1906 for the year so I have to append acpi=force to get the system to even boot into linux. PCLinuxoS and Fedora don't need this extra force command but Ubuntu does. When I use liveupdate from MSI, the newest version of bios is older than the one that the board came with and I can't find the proper bios through any of their websites. I will never buy another MSI product. I'll stick with Abit and Asus for my mobo needs since I've never had a single problem with any of those manufacturers motherboards or video cards.
The strange thing is that when I put in an ATI card, the post memory check is fast and with an nvidia card the post memory check is noticeably slower. Like 4 or 5 times slower to count up the 1 Gig.
I never tried the ET benchmark with an ati card though but knowing the slower frame rates with the fglrx drivers it wouldn't have made much difference. I can't run the ATi card on the sempron in Linux since the kernel doesn't setup the agp port properly and direct rendering is disabled as a result.
AthlonXP 2400+ with 512M ddr266 asus nvidia 6600(non gt)
It benched at 54 FPS.
much slower CPU, slower memory, way slower video card - 9FPS difference.
This would lead me to believe that something is really amiss with the motherboard/cpu/memory combo on the P4 system.
I opened up a tech request with MSI about it and will be waiting to hear back about it. Might spend a few bucks and get an intel based mobo for the P4 and see if that works any better but I'm waiting for the response from MSI.
Sempron OC 2.4G beat the P4 3.06G by a minimum of 25% on all benchmarks.
Kernel Compile 2.6.19 stock
P4 = Real 66 Minutes, User 51 minutes
Sempron OC 2.4G = Real 49 Minutes, User 30 Minutes
So I can say with absolute certainty that the overclocked Sempron 2800+ socket 754 processor is faster than the P4 3.06G socket T(LGA775) processor with all the same hardware except for motherboard/cpu for obvious reasons.
The Sempron is overclocked 50% on the stock cooler from amd and has been OC'd since day one which is almost 8 months running 24 hrs a day 7 days a week so it is stable.
While the P4 CPU itself may be decent, the MSI PM8M3-V H ver 4.1 with Bios 3.2 must be a lemon. It runs stable and all but it just seems to be a bad combo. Looks like it will end up in the MAME machine running win2k and mame32 replacing the P3 600 I have in there now.
I have to say I am really disappointed with the performance of the P4 setup and shocked at the same time.
Does anyone have any ideas or possible reasons for the poor performance?
The numbers do mostly make sense now, now that I know you are running in single channel memory as well as knowing more of your system hardware specs. Though I would have guessed that the Pentium 4 would have performed slightly better.
Received a response from MSI basically saying AMD is better in gaming and intel is better in processing. No comment on why the post is so slow with an nvidia based video card. They provided me a link to the Toms Hardware CPU section. Pitiful response in my eyes especially considering the cpu charts on TH only show stats with ddr2.
I have gone back to the sempron system with the 7600gs as it performs great. Not much slower than a really high end system for most things I do anyway.