Intel D875PBZLK

[Ralf Hutter]

Originally posted by specmike
I have been talking to a couple of guy over at Corsair HoH and they are having problems with Sandra telling them that their PAT is not working, their buffered mem bench is low, etc.

Has anyone tried the little app that's linked in this thread right here in this forum that claims to show whether PAT is enabled or not? I have no HDD hooked up to my new 875PBZ rig yet so I can't try it but it does work fine on my PIII-S system.

[specmike]

Hey Ralf, Oldfart said that CPU-Z ver 1.18c would show if PAT is enabled. I have DLd that version yet so I can't say personally. I'm going to see if they have that version at wwwl.MajorGeeks.com

Mike.

[Sandog]

Hey Ralf, I checked out that program and no matter what my bios settings were I could not get the program to detect PAT. I have an Intel D875PBZLK.

[Miles]

Originally posted by Sandog
Hey Ralf, I checked out that program and no matter what my bios settings were I could not get the program to detect PAT. I have an Intel D875PBZLK.

I get the same information as you Sandog when I run the program, wonder if it's a software glitch specific to our board or if PAT is in fact not enabled...That would be a real pisser if the creator of PAT failed to enable it on their own board I even tried turning off the burn in mode which I had set at +4% and no changes in the results!

[Sandog]

I tried every setting possible beginning with defaut, removing two of my four sticks of memory, and pulling the power cord off for a few minutes before I booted. I don't care anymore about PAT, I have good mem bandwidth and 3DMark scores comparable to any board out there running at my speeds. I think PAT is a figment of the Intel's imagination/lol.

[Miles]

Originally posted by Sandog
I tried every setting possible beginning with defaut, removing two of my four sticks of memory, and pulling the power cord off for a few minutes before I booted. I don't care anymore about PAT, I have good mem bandwidth and 3DMark scores comparable to any board out there running at my speeds. I think PAT is a figment of the Intel's imagination/lol.

I'm with you Sandog, I love this board! It would, however, be nice to get what we paid for especially since PAT is Intel's own process

[nad]

CPU-Z 1.18C shows PAT as DISABLED with my board.

I am not overclocking. I am running dual channel 400MHz, and an 800FSB P4..


This is unacceptable if it is true.

[Sandog]

Well with Intel processors and newest Intel BIOS I'm sure our boards are running at their peak. I also have two very good sticks of memory. I mean having the Intel Canterwood flagship motherboard (I'm refering to the Intel D875PBZLK) we should be the first ones using PAT don't you agree? Since it's not in BIOS I would assume it's on all the time but for when you overclock the FSB. If Intel wanted to they could have had a selection for it in BIOS but 5 BIOS updates later, still no option for doing PAT.

[nad]

That little program posted above and Sandra both report PAT as DISABLED.

[Miles]

I am running the same as you NAD and it shows that my PAT is disabled in CPU-Z 118c...what BIOS and settings are you running if you don't minde sharing them with us? TIA

[Sandog]

Nad doesn't have PAT enabled either Milesc3.

[nad]

Auto everything, except RAM timings. I run BIOS P08


Here are the only things I change in BIOS:

Serial Port DISABLED
DMI Logging DISABLED
RAM Timings 2-3-2-6
Intel RAID - On
AGP Aperture - 128MB
Intel Silent Boot - disabled
AC Power Loss State - Off

That's it. Everything else is left alone on default settings. No Burn-In enabled. I am running processor at 800MHz bus and RAM at dual channel DDR400.


I am starting to think that it is not enabled because the D875PBZ is not running at exactly 800MHz bus. It is at 798 or something. My processor runs under 3GHz. Something like 2992MHz.

[Miles]

I am starting to think that it is not enabled because the D875PBZ is not running at exactly 800MHz bus. It is at 798 or something. My processor runs under 3GHz. Something like 2992MHz.

Yeah mine does too. I'm running a 2.8 and it runs at around 2797, FSB in CPU-Z shows as 199.5. I am beginning to wonder if it is just what you said, I've tried all the "burn in" settings from 1% to 4% and still no PAT ... This is either something very simple that we all are overlooking or "I smell a class-action" against Intel, probably would go about as far as the one that was filed against IBM and their GXP hard drives :eek:

Let me see if I get this correctly the board is setup to run just slightly under clocked so as not to make the minimum 800Mhz FSB, it's also set so that if you overclock PAT won't work. Sort of a Catch 22 if that's in fact is the case.

[bigtoe]

I personnally feel your boards are PAT enabled but Intel is using "reserved registers" to make the board supremely fast at stock fsb.this is why you see a (0) instead of (1)

Remember there is little that can beat the Intel at stock speed.

[realdieu]

Well, I just received a response from Michael at Lostcircuits and here is his response:

The easy and unequivocal way to find out is to run cachemem and look at the latencies. If the highest latencies are around 100 ns, PAT is working, if they are above 130 ns, it is not. You may have to re-run cachemem a few times if you have stray results.

The numbers shown are cpu cycles so you need to divide them by the GHz value of your CPU, e.g. 270 cycles / 3.0 = 90 ns.

If you were running a 3.0 GHz CPU, I say that PAT is definitely enabled, otherwise, your numbers would be in the 450'ies, if your CPU is any slower speed grade, it would become more difficult to judge.

Update! I guess PAT is enabled!!!

Originally posted by bigtoe
I personnally feel your boards are PAT enabled but Intel is using "reserved registers" to make the board supremely fast at stock fsb.this is why you see a (0) instead of (1)

Remember there is little that can beat the Intel at stock speed.