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*** Official ASUS P4C800/Deluxe (875P) Thread ***

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Found some updated test programs that everyone may find of interest.

MemTest86+ updated original MemTest86

PC Wizard is among the most advanced system information programs on the market.

PC WIZARD 2004 is a powerful utility designed especially for detection of hardware, but also some more analysis. It's able to identify a large scale of system components and supports the latest technologies and standards. This tool is periodically updated (usually once per month) in order to provide most accurate results.

PC WIZARD 2004 is also an utility designed to analyze and benchmark your computer system. It can analyze and benchmark many kinds of hardware, such as CPU performance, Cache performance, RAM performance, Hard Disk performance, CD/DVD-ROM performance, Removable/FLASH Media performance.

Enjoy - They are both 100% Free 😀
 
Has anyone noticed any problems staying logged in here?? I STILL have the Anandtech cookie, but every #$%@ time I click an email notification link that a post has been added and I click it, I'm logged out!! I have to keep repeatedly logging in at every visit to the site to read a post even though the AT cookie is STILL in my temp net files folder.

(Thanks for the links John).
 
Originally posted by: computer
Has anyone noticed any problems staying logged in here?? I STILL have the Anandtech cookie, but every #$%@ time I click an email notification link that a post has been added and I click it, I'm logged out!! I have to keep repeatedly logging in at every visit to the site to read a post even though the AT cookie is STILL in my temp net files folder.

(Thanks for the links John).
Click to expand...

I had to do this same thing about two weeks ago but once I rechecked the stay logged in button on the login page, it was fine after that.
 
Does anyone else notice that PCwizard won't see IDE HD's connected to the Promise controller for the benchmarks? It sees the Raptor, but not an IDE HD.

EDIT: Never mind, it showed up. Don't know why it didn't at first. This is very disheartening.....My 80gb/7200rpm/8mb Maxtor on a Promise Ultra100TX PCI card on a P4B533 is SMOKING the Raptor and WD800JB on the P4C800-E Deluxe in these HD benchmarks for sequential and random reads when they are on the Promise controller!!
 
I tested with a friend's RAM today, and guess what. The computer started up fine.
I tried updating to the latest BIOS and changed the RAM settings in BIOS to what Xeon recommended. But it still didn't work.
Asus P4C800 + Corsair TwinX 1024RE-3200LL = no good 🙁
 
I'm looking at getting some Kingston HyperX KHX3500 DDR433 instead. Does anyone have any experience with this RAM working with a Asus P4C800-motherboard? There won't be a problem with it because it's DDR433 instead of 400, will there?
 
PC3500 is more likely to be stable at stock settings (PC3200 speed) than PC3200, because it's either better quality, or using slower timings by SPD.
 
Originally posted by: xabin
I'm looking at getting some Kingston HyperX KHX3500 DDR433 instead. Does anyone have any experience with this RAM working with a Asus P4C800-motherboard? There won't be a problem with it because it's DDR433 instead of 400, will there?
Click to expand...
I have been running the HyperX PC3500 for several months on my P4C800-Dlx. I bought my 1Gb back in May 2003 so I believe it to be using the Winbond BH5 chips, even though I have never removed the heatspreaders. They had not starting using the BH6 or CH5 at that time. I have this running at 262fsb using the 5:4 memory ratio which puts it at DDR420 with timings set at 2-2-2-5. Going to try some PC4000 when it comes in on Thursday and get some comparisons of the 5:4 vs 1:1 on my rig.
 
Originally posted by: jhites
Originally posted by: xabin
I'm looking at getting some Kingston HyperX KHX3500 DDR433 instead. Does anyone have any experience with this RAM working with a Asus P4C800-motherboard? There won't be a problem with it because it's DDR433 instead of 400, will there?
Click to expand...
I have been running the HyperX PC3500 for several months on my P4C800-Dlx. I bought my 1Gb back in May 2003 so I believe it to be using the Winbond BH5 chips, even though I have never removed the heatspreaders. They had not starting using the BH6 or CH5 at that time. I have this running at 262fsb using the 5:4 memory ratio which puts it at DDR420 with timings set at 2-2-2-5. Going to try some PC4000 when it comes in on Thursday and get some comparisons of the 5:4 vs 1:1 on my rig.
Click to expand...

Ahh man, that's exactly what I'd like to do here real soon, so let us all know what kind of results you get. You hear the argument constantly that lower timings beat FSB and Vice Versa and that's one argument I'd like to settle in my own mind once and for all. When I say this I mean from a performance standpoint, using the same processor. My problem is I'm not sure what memory to get for this 2.4C to really test this. I'd like to get some Mushkin PC3500 Level II or even some of that Kingston (if I could find some with BH5 chips) but there is the problem, finding some.

At any rate jhites, please let us know how your testing goes on this subject, hopefully you'll get some good sticks of PC4000 to do the compare.
 
any of your notices that this board overvolts by 0.03 to 0.05?

when overclocking what is the max voltage you set it to? i have mine set at 1.525V but its shooting upto 1.585 when idle. preventing me from setting higher voltages.
 
Originally posted by: mryoso
any of your notices that this board overvolts by 0.03 to 0.05?

when overclocking what is the max voltage you set it to? i have mine set at 1.525V but its shooting upto 1.585 when idle. preventing me from setting higher voltages.
Click to expand...

Yep go here to see a discussion and testing thats been done that shows what is typical for this motherboard.

XShellR8 Voltage Fluctuation Results

People are doing the droop mod to take care of a big portion of this fuctuation, but remember, it will completely void your warranty on this motherboard if you do it. I hear great things about it, but haven't actually tried or tested it myself. There are some here that have however and I've seen plenty of people on other forums that are using it very successfully.

UPDATE Unless you're having stability problems and/or you are trying to push your overclock to the limit, I probably wouldn't even do the droop mod or even worry about it. As you may have already noticed from the data shown at the above link, I personally believe Asus engineered these voltage ranges into this board and many of their others, depending on how your setup within the bios, cpu you have, etc.
 
The VRM fluctuates all over the place on mine, you can read my full review at Sysopt.com. I've found vCore fluctuates by around +- 7%, which is 14% total, and ruins my efforts to maintain stability near the limits of my CPU.
 
Thanks!

For those out there with p4c800 dlx. where do u get your voltage at? i have mine at 1.525 ( shoots to 1.585 idle ). and i want to go higher, i need about 1.575 ( BIOS ) to stablize 250fsb, and this reads ~1.616v when idle ( again goes back to 1.575 when loaded ). is that safe? or is it harmful? im using asus probe 2.22.04 by the way.

im stable at 245 fsb at def voltage
 
The VRM fluctuates all over the place on mine, you can read my full review at Sysopt.com. I've found vCore fluctuates by around +- 7%, which is 14% total, and ruins my efforts to maintain stability near the limits of my CPU.
Click to expand...
Why not try the Vcore stability mod?
 
For those out there with p4c800 dlx. where do u get your voltage at? i have mine at 1.525 ( shoots to 1.585 idle ). and i want to go higher, i need about 1.575 ( BIOS ) to stablize 250fsb, and this reads ~1.616v when idle ( again goes back to 1.575 when loaded ). is that safe? or is it harmful? im using asus probe 2.22.04 by the way.
Click to expand...
I don't know if you mean at what setting it's set, or how it's monitored. In my tests I found that 1.6v is the best with PAT and Turbo on. This gave no Memtest errors and the CPU could not O'clock any more with a higher voltage. Setting it less DID give errors. Strangely with PAT and Turbo off, 1.6v gave errors and 1.585 did not, so with them off 1.585v is the best........in my tests.
 


1.525 BIOS SET = 1.5 to 1.52 ( loaded ) 1.56 to 1.586 ( idle ) PROBE Read

computer, are the voltages you mentioned BIOS set or Probe Read
 
That's in the BIOS.

Yeah, as far as the monitoring goes, something is not accurate. I've rarely seen the same readings from the BIOS compared to any HW monitoring software. I don't even bother with it, I just set what voltage works best in the BIOS and don't worry about which of the actual voltages are correct; BIOS readout or monitoring software. I think though if I ever had to get close to the CPU's limit, I'd want to know then but in my experiences I've never over-volted a CPU to the limit. You probably can't compare the reading in a BIOS to reading in Windows anyway since of course one is the CPU voltage not in Windows, and one is. So, they may jive after all, dunno.
 
how about trying this.

set the vcore in bios, restart then go to the BIOS and check the voltages there. it doenst match. its a bit scary and confusing....
 
Well it never does match. That's what all the discussion was here about unstable Vcore on this mobo. The higher you set it, the LOWER the voltage readings. Setting it to something like 1.65v will give you something like 1.52v actual reading in the BIOS, even lower at times. It's opposite......you raise it, it lowers, and fluctuates MADLY when you pass 1.6v volts. Below that it's not as bad, but still exists. It was worse on my Rev. 1.2 board than my Rev. 2.0 board, but yet it still does exist. Look at Michael's post below (or above depending on how your thread is set).

I guess some of us could possibly get higher CPU O'clocks if the voltage would go up as you set it.
 
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