2.8C on P4c800-e & pc3700EB not Oc'ing.

[sierra248]

2.8C on P4c800-e & pc3700EB not Oc'ing.

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Alright Guys I finally sleeved my Power Supply and got my memory and well, IT AINT OVERCLOCKING NEARLY as Much as I had hoped.

Here is what I have that is important to the Overclocking:

Asus P4c800-E with P4 2.8C SL6Z5
Antec 430Watt with 2 fans
2x512 OCZ PC3700EB
Antec p160 Aluminum Case
Thermalright SP-94 with 92mm Tornado(Artic Silver)
Thermalright NB-1 with small fan that came with it(Artic Silver)
120MM Stealth Front Intake Fan
120MM Stealth Rear Exhaust Fan

Ok Here is the Problem, I looked everywhere for this chip and paid a high price for it and it is not overclocking near where I wanted it to. I been playing around with the settings, but this is the first computer I've built to OC since my P3 and allot of the setting I am not sure I get all the settings.

So this is where I have found that the system runs stable at so far(6 hours of Prime95, Sandra Burn in and CPU Burn-in all running at same time for 6 hours.

Configuration System Frequency/Voltage

AI Overclock Tuner @Manual
CPU External Frequency @230
DRAM Frequency @400 Mhz
AGP/PCI Frequency @66.66/33.33
CPU Core Voltage @1.6000Volts
DDR Reference Voltage @2.85Volts
AGP VDDQ @1.80V
Performance Mode @Turbo


CPU INFO

CPUID Maximum Value Limit @Disabled
Hyper Threading Technology @Enabled


Advance Memory

Configure DRAM Timing by SPD @Disabled
DRAM CAS Latency @3.0 Clocks
DRAM RAS Precharge @2 Clocks
DRAM RAS to CAS Delay @3 Clocks
DRAM Precharge Delay @5 Clocks
DRAM Burst Length @8 Clocks
Performance Acceleration Mode @Enabled
DRAM Idle Timer @AUTO
DRAM Refresh Rate @AUTO

Graphics Aperture Priority @AGP/PCI
Graphics Aperture Size @128MB
Spread Spectrum @Enabled

ICH Delayed Transaction @Enabled

MPS Revision @1.4


Advanced PCI/PnP Settings

Plug and Play OS @YES
PCI Latency Timer @64
Allocate IRQ to PCI VGA @Yes
Pallette Snooping @Disabled
PCI IDE Busmaster @Enabled


Well those are the only settings I can think will have an effect on my problem of only being able to OC stable to 230MHZ(DDR 460). I really assumed that this chip which I special ordered for a good OC on air to at least DDR500???

I don't think that this is memory related as I turned up all the memory setting to the highest settings (slowest) and ran at a 5:4 Divider and still was same. Even tried 3:2 with same thing. What happens when i go above 248 it either won't boot at all or at lower 240's it may boot but i get blue screens. My Case Temps are running right around 88-90 degrees on full CPU load and the highest CPU speed I've seen is 106 degrees using MotherBoard Monitor at Full Load. I am really hoping that I just have something set wrong or It justs needs to burn-in for awhile, but I have all my fans running full speed and it sounds like a vacuum cleaner its so loud. I just thought I would get at least 250 DDR500, and allot of people around here said that I should be able to go even higher?

Any help will be greatly appreciated as this is annoying the hell out of me as I have been putting this system together part by part and it cost me a pretty penny and now that I finally get it all Sleeved and finally bootable, it isn't what i was expecting. I got most of my input from you guys and am sure youll be able to help me by either telling me what i am doing wrong or by telling me thats as fast as you are probably gonna get. BTW I am running the latest P4C800-E Deluxe Beta BIOS 1017.002.

Thanks again guys for any help.
Tom

 

[Navid]

I don't have an answer!
But, I have a few questions.
How did you come up with VCore=1.6V?
Did you just set it to that? Or, did you go up gradually?
Increasing VCore does not always increase speed. After some point, it just increases temperature and in fact, decreases speed.
You have set VDDQ to 1.8V. Why? 1.6V should be sufficient.
Your memory timing is 3-2-3-5. How did you get to that? Why not something less aggressive?
You should disable spread spectrum if you want to squeeze out every last drop of MHz!

You can run memtest to confirm your conclusion that it is not memory. It just gives you more confidence that it is your CPU.
http://www.memtest86.com/
Run it overnight. Your memory is OK if you get no errors. It installs on a floppy and you boot it. Unfortunately, you cannot use your computer while it is running.
What is good about memtest is that it only stresses the memory.

After you pass memtest, you can use prime95 to see if your CPU is OK or not.

Set Motherboard Monitor 5 to log temperatures and voltages. Set it to add an entry every 20 seconds.
http://mbm.livewiredev.com/
While you are running prime95, MBM5 will log temperatures and voltages. After, open the log and see how low your VCore has gone. Also check your 12-V rail.

 

[sierra248]

Been playing around for hours with this, just doesn't seem to want to run above 230mhz stable. Whats the highest VCORE voltage I can run safely? Also the highest CPU Temps Ive seen are about 108, is that to high?

Thanks for all your helps guy, once i figure out where the limit is with this thing ill post some benchmarks.
Tom

 

[sierra248]

Well I got it going stable at 240 now, but it take 1.75 volts to do it. Its been running prime95 and cpu burn-in at 100% CPU load for about 3 hours, gonna let it run overnight and see what i wake too. Do you think I should try 250 at something like 1.85 volts, or is that to much?

 

[sierra248]

Under load right now it shows 1.65Volts under motherboard monitor with the temp being 114 degrees. So do i need to worry at 1.75 in bios but 1.65 on motherboard monitor? Any suggestions, maybe i should just run at 230, how much difference is there really, but i'd like to run 240. 230 i can run stable at 1.55 volts. Eveyone seems to think I am running way to much voltage to the chip??

 

[AristoV300]

Well let me help you in your BIOS first. Move your AGP voltage back to 1.5, I don't know what your RAM is spec'd to run at but to be safe I would set it to 3-4-4-8 since it is rated to run at 233. Your DRAM Idle timer and refresh rate set to infinite and 7.8u. Disable spread spectrum, change plug and play os to no, pci timer to 32, and no to allocate irq to pci vga.

As for your vcore that is kind of high, go no higher than 1.65. My 3.0c M0 does 235 on 1.55v. You have 2.8 M0 so it should easily do 250 but you may need to change your divider 5/4 since your RAM is limiting you.

 

[sierra248]

I got it to finally boot at 250, but i have to run 1.8volts in bios to get it to run there. From what everyone is saying, this is no good?

 

[AristoV300]

What are your temps??? Well I would say that chips lifespan will be very short if it doesn't blow already:shocked: I prefer not go over 1.65, but I have seen others go as high as 1.7 with good cooling (not air). Anything higher is just to get a benchmark out of it but no way to leave it running that high.

 

[sierra248]

Well I've been playing around with this thing all week and here is what I've decided to leave it, as its stable for 72hours at 100% CPU usage with CPU temps never climbing above 108 Degrees(42 Degrees Celcius). This is the highest OC I can do without going over running over 1.7volts. I'm a little disappointed with the overclock as I paid allot for this SL6Z5 but it runs good and stable.

Asus P4c800-E with P4 2.8C SL6Z5
Antec 430Watt with 2 fans
2x512 OCZ PC3700EB
Antec p160 Aluminum Case
Thermalright SP-94 with 92mm Tornado(Artic Silver)
Thermalright NB-1 with small fan that came with it(Artic Silver)
120MM Stealth Front Intake Fan
120MM Stealth Rear Exhaust Fan

.

Configuration System Frequency/Voltage

AI Overclock Tuner @Manual
CPU External Frequency @230
DRAM Frequency @400 Mhz
AGP/PCI Frequency @66.66/33.33
CPU Core Voltage @1.6000Volts
DDR Reference Voltage @2.85Volts
AGP VDDQ @1.60V
Performance Mode @Turbo


CPU INFO

CPUID Maximum Value Limit @Disabled
Hyper Threading Technology @Enabled


Advance Memory

Configure DRAM Timing by SPD @Disabled
DRAM CAS Latency @3.0 Clocks
DRAM RAS Precharge @2 Clocks
DRAM RAS to CAS Delay @3 Clocks
DRAM Precharge Delay @5 Clocks
DRAM Burst Length @4 Clocks
Performance Acceleration Mode @Enabled
DRAM Idle Timer @AUTO
DRAM Refresh Rate @AUTO

Graphics Aperture Priority @AGP/PCI
Graphics Aperture Size @128MB
Spread Spectrum @Enabled

ICH Delayed Transaction @Enabled

MPS Revision @1.4


Advanced PCI/PnP Settings

Plug and Play OS @YNo
PCI Latency Timer @64
Allocate IRQ to PCI VGA @NO
Pallette Snooping @Disabled
PCI IDE Busmaster @Enabled


Anyone see anything wrong with that? It runs good and Seems to benchmark well. I have no way of posting screenshots right now but I will ASAP. Here is what I get from the Sandra Memory Bandwidth Benchmark:
RAM Bandwidth Int Buff'd iSSE2 = 447MB/s RAM Bandwidth Float Buff'd iSSE2 = 5421 MB/s

3dmark2003 = 1955 with Geforce 4 ti4200 @300/600 MHZ (I know that sucks, new video card coming soon)

Well any comments or suggestions would be greatly appreciated, I'm dissapointed that I couldn't run DDR500 as I had expected but Maybe I'll get the OCZ Booster and run 2.5-2-2 and speed it up a little more.

Thanks Guys its finally done
Tom

 

[Thor86]

Configuration System Frequency/Voltage

AI Overclock Tuner @Manual
CPU External Frequency @230
DRAM Frequency @400 Mhz
AGP/PCI Frequency @66.66/33.33
CPU Core Voltage @1.6000Volts
DDR Reference Voltage @2.85Volts
AGP VDDQ @1.60V <---- You shouldn't need more than 1.5 default. You only need to raise this if you are overclocking your vidcard or want to run 300+fsb.
Performance Mode @Turbo <--- Change this to Standard.


CPU INFO

CPUID Maximum Value Limit @Disabled
Hyper Threading Technology @Enabled


Advance Memory

Configure DRAM Timing by SPD @Disabled
DRAM CAS Latency @3.0 Clocks
DRAM RAS Precharge @2 Clocks
DRAM RAS to CAS Delay @3 Clocks
DRAM Precharge Delay @5 Clocks <---- Change this to 8.
DRAM Burst Length @4 Clocks <---- Change this to 8.
Performance Acceleration Mode @Enabled
DRAM Idle Timer @AUTO
DRAM Refresh Rate @AUTO

Graphics Aperture Priority @AGP/PCI
Graphics Aperture Size @128MB
Spread Spectrum @Enabled <---- Disable this.

ICH Delayed Transaction @Enabled <---- Disable this.

MPS Revision @1.4


Advanced PCI/PnP Settings

Plug and Play OS @YNo
PCI Latency Timer @64
Allocate IRQ to PCI VGA @NO
Pallette Snooping @Disabled
PCI IDE Busmaster @Enabled


Also disable any audio, usb, serial, parallel devices on your motherboard if you are not using them.

My SL6Z5 does 257fsb at 1.65vcore setting in the bios - which translates to 1.62 idle / 1.55 load.

 

[ScottFern]

I am using Thor86s settings for the bios. I have almost the same setup as you, just different PSU and RAM.

I am now down to 235fsb, with my vddr at 2.85v, and my vcore at 1.565v, I know our Motherboards overcharge the voltages, and when I have it at 1.565v it usually goes up to 1.61v. This has been very frustrating, PCMark04 and ran fine at 3.4ghz, but with Prime95 it locked up. Now I am testing 3.28Ghz. I don't know what the perfect combo of speeds and voltages are but I don't want to stay at 3.289Ghz. ARRRGGGHHH.

Anymore tips or tricks to get it up to 250fsb ? My PC4000 memory timing is 3-4-4-8.

 

[PClark99]

Try running the Ram 5:4, or try running only 1 stick in single channel mode.

I have a similar setup, my chip runs 3500 at def setting in the bios, but the board overvolts to 1.575.

My HyperX is running 1:1 at 2.65V

The CPU is SL6Z5 too.

Not all chips are created equal though.

 

[ScottFern]

I can "run" at 3.5Ghz but PCMark04 and Prime95 both crash, could it be my cooling ?

Could I be overvolting the RAM at 2.8v ?

 

[PClark99]

no you could probably run that ram upwards of 3.0V.

maybe the RAM just isn't cutting it, maybe you have a bad stick.

try 1 stick or try running in different DIMM slots.

 

[ScottFern]

I now got back up to 237fsb=3.3Ghz, 500Mhz overclock good ?!!@? lol

 

[PClark99]

Originally posted by: ScottFern
I now got back up to 237fsb=3.3Ghz, 500Mhz overclock good ?!!@? lol

Not bad, but you need more! Hahaha

 

[MrK6]

Yah, in both cases here I see the RAM as being the culprit. Note that you aren't going to get much above 250FSB no matter what you do, cause you're starting to close in on 3.6GHz, and that's where a lot of P4 C's crap out. As Thor86 said, change your precharge timing to 7 or 8, as any lower than that is gonna make your RAM unstable. You might even want to try using 3-4-4-8-8 timings.

 

[ScottFern]

That is the timing I am running, at 3.4Ghz Prime95 resets my computer after 10 minutes. 3.3Ghz seems to be stable for over 45min - 1hr.

vcore - 1.6v
vddr - 2.85v
agpv - 1.6v

I have hit a brick wall!!!! 3.317Ghz

 

[Navid]

To confirm that it is the CPU and not the RAM, you can change the mem:cpu seeting to 4:5 and run your tests again. If you can then go higher on FSB, you will know that it is the RAM that is limiting.

 

[wicktron]

Originally posted by: Navid
To confirm that it is the CPU and not the RAM, you can change the mem:cpu seeting to 4:5 and run your tests again. If you can then go higher on FSB, you will know that it is the RAM that is limiting.

The only way he can use 4:5 is if he uses a hacked BIOS. Perhaps you meant 5:4

 

[Navid]

Originally posted by: wicktron

Originally posted by: Navid
To confirm that it is the CPU and not the RAM, you can change the mem:cpu seeting to 4:5 and run your tests again. If you can then go higher on FSB, you will know that it is the RAM that is limiting.

The only way he can use 4:5 is if he uses a hacked BIOS. Perhaps you meant 5:4

I meant set the mem:CPU to 4:5, which would reduce the memory frequency. Hence, remove the memory as an overclock limit suspect.