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

[anberg]

Yes 14 bit

Here's how it works. Each pixel needs a value for R, G and B. Each is sampled at 14 bits. Don't want to split a byte, so 14 bits = 2 bytes. So each pixel is 6 bytes

Now here's the kicker--the scanner resolves 4000 pixels per inch. A medium format negative is 55mm square (=2.16 inches)

So, the file is 6bytes x 4000 squared x 2.16 squared = 448MB

If I load one of these images then, along with the Photoshop program etc I'm already using about 750MB RAM. Now, if I ask it to rotate the picture it has to remap every pixel. Don't know why, but this actually eats about 900MB RAM (so the rotation is fast--impressive). So , at this point, with 2GB RAM and 1.6GB dedicated to Photoshop I'm practically out of RAM.

What I was planning on doing was closing and reopening the image, which restores you to 750 RAM usage with 850 available.

Each Photoshop operation eats RAM. Can't get it back except by saving and reopening the image. And maybe you don't want to save it. As long as it's open you can go back and redo any step.

So 4GB seems the way to go. I was mislead by a computer salesman who told me 2 sticks was the max for DDR, which I must say didn't make common sense to me since the Motherboard has four slots

Thanks

 

[anberg]

Oops, forgot to mention the CPU temp

At 10% overclock (set automatically in the BIOS) CPU temp at idle is 100-110F. When stressed, 125F

I'm happy at 10% overclock. Don't have the expertise to tweak it further

Just wanted to make sure the CPU temp was ok

Many thanks

 

[computer]

Yeah I knew how the pixels Vs. size went, that's just one MASSIVE file size. Scanning at 4000dpi is quite large, you may not need to go that high. (BTW, are you using a transparency adapter on the scanner?) Either "Call for Help" or "The Screensavers" on TechTV had a segment on using the correct scanning dpi for specific negative sizes, but I can't recall what that was. You should be able to find that at their websites. Over-scanning will only give you more noise and not any more detail, so you want to scan it at the optimal dpi. And, the optimal dpi would only be needed if you are printing out the scanned images. I've never used Photoshop, but depending on what you want to do with the scanned images, you might be able to some what back down on the scanning dpi.

If you must scan at 4000dpi, if you find out that is the optimal scanning dpi for the negative size and you're printing out the scans, then it sounds like you could really use 4gb of RAM.

If that CPU temp is in the BIOS, that's normal. If that reading is within Windows, that's a bit high. Mine is a 2.4C @3.4ghz (about 41% O'clock) and it runs about 100°F in the BIOS, and about 80°F max in Windows idle. Never gets above 100°F in Windows. That's with the stock HSF unit.

It doesn't take anything to run the O'clock to 20 or 30%, just a key stroke. However you must have a good CPU & memory combo to run a 30% O'clock with a 3.2ghz CPU. Most are getting better results by turning that area off and O'clocking manually since you can tweak the other settings as well when set to manual.

 

[anberg]

This is a dedicated negative scanner--that's all it does. Nikon Coolscan 8000

4000 dpi gives the most detail and if I'm compulsive enough it'll do up to a 16x scan to error correct out the noise.

I usually downsample to print. When you do Photoshop operations though each operation degrades the image a bit. Best practice is to work with the whole image and resample down last. resampling down doesn't just subtract pixels--it resamples down with some averaging algorithm

BTW on the terminology. "24 bit" really is 8 bit per channel. "14 bit" is also referred to as "42 bit"

The results will blow your mind

 

[bandulu]

Sorry for newbie questions

it's not posible to adjust de memory bus speed manually?
in the bios settings i can only set to 266, 333, or 400MHz
if i do automatic 20% overclock sets FSBRAM to 3:2, how i can keep 1:1¿

 

[jhites]

Originally posted by: bandulu
Sorry for newbie questions

it's not posible to adjust de memory bus speed manually?
in the bios settings i can only set to 266, 333, or 400MHz
if i do automatic 20% overclock sets FSBRAM to 3:2, how i can keep 1:1¿

The Manual Memory ratio's to FSB are:
400 = 1:1
333 = 5:4
266 = 3:2

 

[benRWiart]

Hi, I finally received all the hardware for my new comp. I set everything together. Run fine except the HD was DOA, thanks seagate, So right now I'm running memory test.
No errors so far.
Just a question about my corsair ram: it's some PC3200C2, rating for this timing: 2-3-3-6-T1, I set manualy everything in bios except the T1 thing which Idon't know and did not find any options proposing T1.???
Also, is there any other options I need to set except these timings, to run my ram correctly, like the power???? I don't want to overclock, just set my ramm at the timing it is rated.
THX

 

[aamsel]

I have a version 2.0 P4C800-E Deluxe. I have been running two Kingston HyperX PC4000 512's in dual channel for about 4 months without any problem. Suddenly a few days ago, I started getting the Post Voice message "System Fail CPU check". The video would go nuts and the system would freeze before I would power it off, then it woud get that message. If I unplugged the power cord for a 1/2 hour or so, it would come up again, then lock again. After searching for threads about this, I checked that I had version 2.0, and also, I am not using the OEM heatsink. I am using a Thermalright with 120mm fan. Nothing worked until I removed one of the HyperX sticks. The system is now running. However, before and after pulling the one stick I get erratic performance in 3D Mark 2003. The video moves a few frames, then freezes. I have a Radeon 9700 Pro. What would be causing this? I would have believed that it would be the memory, but not after it had worked flawlessly for 4 months.
Please advise as to what I should do/try.
Thanks,
Andrew
Austin, TX

 

[computer]

Hi, I finally received all the hardware for my new comp. I set everything together. Run fine except the HD was DOA, thanks seagate, So right now I'm running memory test.
No errors so far.
Just a question about my corsair ram: it's some PC3200C2, rating for this timing: 2-3-3-6-T1, I set manualy everything in bios except the T1 thing which Idon't know and did not find any options proposing T1.???
Also, is there any other options I need to set except these timings, to run my ram correctly, like the power???? I don't want to overclock, just set my ramm at the timing it is rated.

Memory for this mobo usually works best at the max 2.85v and even higher sometimes (with the Vdimm mod).

All the rest of the memory settings just set to "auto" or default for starters.

Get you a Raptor or the Maxtor 7200rpm ATA133 8mb buffer series. Both of them smoke the Seagates. Even the SATA Seagates.

 

[aamsel]

Update: I had not used 3D Mark recently. Is the video ALWAYS choppy with it?? I just tried Aquamark3 and the video is very smooth with it. I do have a Raptor WD740.
Andrew
------------------------------------------------------------------------------------------------------------------------------------------------------
I have a version 2.0 P4C800-E Deluxe. I have been running two Kingston HyperX PC4000 512's in dual channel for about 4 months without any problem. Suddenly a few days ago, I started getting the Post Voice message "System Fail CPU check". The video would go nuts and the system would freeze before I would power it off, then it woud get that message. If I unplugged the power cord for a 1/2 hour or so, it would come up again, then lock again. After searching for threads about this, I checked that I had version 2.0, and also, I am not using the OEM heatsink. I am using a Thermalright with 120mm fan. Nothing worked until I removed one of the HyperX sticks. The system is now running. However, before and after pulling the one stick I get erratic performance in 3D Mark 2003. The video moves a few frames, then freezes. I have a Radeon 9700 Pro. What would be causing this? I would have believed that it would be the memory, but not after it had worked flawlessly for 4 months.
Please advise as to what I should do/try.
Thanks,
Andrew
Austin, TX

 

[computer]

aamsel is your ATI one of the new ATI cards not covered in the Asus manual? They list a compatibility problem with ATI cards with a certain rev. # (I can't tell if by Rev. 2.0 you mean the mobo, or the video card).

 

[jhites]

Originally posted by: aamsel
Update: I had not used 3D Mark recently. Is the video ALWAYS choppy with it?? I just tried Aquamark3 and the video is very smooth with it. I do have a Raptor WD740.
Andrew

Hello Andrew, live in Austin myself.

3D Mark should also be smooth. ATI did have some problems with the 9700 Pro cards and this board but only with revision -30 and prior. Cards after rev-30 had this corrected but there is a work around for the earlier cards. I do have a ATI AIW 9700 Pro rev-11 that has been working just fine for ever with this board but I did have to use the work around.

Couple of things you can try:
1.) For ATI card set the Fast Write to Off under the SmartGart Tab and under the Troubleshoot Tab un-check the Enable Write Combining.
2.) Set the vdimm to 2.85v and set the vagp to 1.7v in the bios.
3.) If you have not done so, change from the blue slots to the black or vice versa using both sticks. Download and run MemTest86+ and test the ram in both of the slot pairs for errors.

 

[benRWiart]

Hi, I'm running the windows memory test, extended test for 12 hours, no errors, cool...
But when I use memtest, I don't get errors but the all thing freeze at 98% all the time. Looks like a bug, but I don't know???

 

[computer]

Search this thread for that problem posted by Xeon (Michael). He had that same problem but I don't recall how he fixed it.

 

[aamsel]

Actually, my card is not a genuine 9700 Pro. It was a 9500 with the "good" RAM that was flashed to a 9700 Pro.
Andrew
Austin, TX

 

[ItsMillerTime]

Does anyone know if the 2.8E will work on this mobo? I need to build a system for my nephew and am thinking about using my 2.8C on an Abit IS-7 for him, and get the Prescott for my Asus

 

[computer]

The 2.8E is a total waste of money. It's much slower than the 2.4C @2.8ghz, and even slower in some tests with the 2.4C at DEFAULT speeds! Don't ask why, I don't think anyone has the answer to that.

 

[aamsel]

Buy the C's while they are still around. We may not see such a powerful, flexible CPU for awhile.
Andrew
Austin, TX

 

[computer]

Especially the 2.4C, since it has the best performance of all of them due to the lower multiplier and you're able to get higher FSB speeds.

 

[ItsMillerTime]

That's too bad; it's only $11 more than the 2.8C!

I'll just get another 2.8C. Who knows, I might end up with a Malay chip

I'll probably set his system to 233FSB, any suggestions for good, inexpensive RAM. I'm using OCZ 3700 Gold on my board @242FSB.

 

[computer]

Like I said, you're better off with the 2.4C. You'll get a much higher FSB with the 2.4C giving you more performance than a 2.8 or 3.0ghz. Any 2.4C should do at least 3ghz. A 2.4C @3ghz has better performance than a 3.0ghz P4. Even if you O'clock the 2.8, it will still be lagging behind a 2.4 since the 2.4 will always have a higher FSB for a given speed.

The faster the CPU you decide upon, the slower your memory should be. If you decide on a 2.4, you'd want PC4000 and you can't go wrong with OCZ Gold.

 

[ItsMillerTime]

Sure, if I was to start from scratch, I would use a 2.4C with OCZ 4000 Gold. But, I'm stuck with the 3700 Gold. I'm not going to use top grade RAM with his system; he's on a budget

Best I can hope for is the Malay

 

[computer]

Ok then you may be better off with the 2.8C with that memory. Some OCZ 3700 Gold will do over DDR500, so if you know if yours will do that, then in that case you'd be better off with the 2.4C.

 

[jhites]

Originally posted by: ItsMillerTime
Sure, if I was to start from scratch, I would use a 2.4C with OCZ 4000 Gold. But, I'm stuck with the 3700 Gold. I'm not going to use top grade RAM with his system; he's on a budget

Best I can hope for is the Malay

If you are going with a 2.8C, try to find a SL6Z5 MO stepping multi-vid chip.

Mine is doing 3.7Ghz using 1.488vcore.

 

[kona]

Does anyone know what the purpose is of having two different internal USB headers is; each having a different voltage/current output:


USB56 rated @ +5v and +6v on this header
USB78 rated @ +7v and +8v on this header


Would it be a safe to assume ( yeah, yeah, yeah ... I know about the 'assume' thing!) that the USB78 header is for more voltage/current hungry peripherals e.g., a scanner, leaving USB56 for say, an optical mouse?

Both the ASUS P4C800E Deluxe as well as the P4P800 Deluxe mobos have the same configuration.



Dave