Overclock.net › Forums › Intel › Intel CPUs › Best way to OC 1.8A on Asus P4P800
New Posts  All Forums:Forum Nav:

Best way to OC 1.8A on Asus P4P800

post #1 of 8
Thread Starter 
May I have some advice to get the most of 1.8A (FSB 400/ L2 512) with Asus P4P800?

I purchased 2 sticks of 256 DDR400 PC3200 ram for dual channel. Dual channel makes difference? Is it possible to set up dual channel with 4 sticks of 256 DDR400 (total 1G)? Thanks
My System
(13 items)
 
  
CPUMotherboardOSMonitor
P4 Northwood 2.6c/3.0 P4P800 DELUXE Win XP Pro Sp2 Samsung Syncmaster CX714X 
KeyboardPowerMouse
Slim Aspire ATX-AS420W Logitech PS2 
  hide details  
Reply
My System
(13 items)
 
  
CPUMotherboardOSMonitor
P4 Northwood 2.6c/3.0 P4P800 DELUXE Win XP Pro Sp2 Samsung Syncmaster CX714X 
KeyboardPowerMouse
Slim Aspire ATX-AS420W Logitech PS2 
  hide details  
Reply
post #2 of 8
Quote:
Originally Posted by Moonhill
May I have some advice to get the most of 1.8A (FSB 400/ L2 512) with Asus P4P800?

I purchased 2 sticks of 256 DDR400 PC3200 ram for dual channel. Dual channel makes difference? Is it possible to set up dual channel with 4 sticks of 256 DDR400 (total 1G)? Thanks
Your Intel cpu is quad pumped meaning that every cpu clock cycle it sends 4 instructions. So even though the FSB (Front Side Bus) speed is 400MHz it's effectively running at 100 MHz (400 MHz / 4).
As for your DDR (Double Data Rate) memory modules... every clock cycle they send 2 instructions. PC3200 ram is rated 400MHz but since it has a double data rate then the effective clock speed becomes 200 MHz (400 MHz / 2).

So what do you make out of all this ? Your ram is running twice as fast as your cpu. So your cpu is limiting the performance of your machine.
Intel based systems give out the best performance when the cpu runs as fast as ram modules (this is called a 1:1 FSB:RAM divider). Although it wouldn't hurt to have your ram running faster than your cpu (but that's not the optimal configuration).
So technically you should try to pump your effective FSB speed to 200MHz (although I doubt it'll go so far).
Here's a link to download your Asus P4P800 mobo's manual for more details on the Bios sections.
Go into your Bios and look for "Jumper Free Settings" and set it to "Manual".
you will then have the option to configure your settings with more precision.
Gradually raise your FSB in small steps (3 to 5 MHz at a time) starting from 100. Save your settings and reboot each time then once you get into Windows you should check your machine for stability.

As for your dual channel questions.
Yes dual channel makes a big difference as it doubles the bandwidth of your ram.
And yes you can use dual channel mode with 2, 3 and 4 sticks if your mobo supports dual channel.
Usually mobos that support dual channel have onboard ram slots with two different colors.
Here's a link to help you understand the different possibilities for running in dual channel mode.

Theoretically to make use of dual channel more you should do three things:
1) Buy a mobo that supports dual channel.
2) Buy identical sticks of ram.
3) Install the ram modules in the appropriate memory banks + slots (usually you should install your identical sticks in the slots having the same color). So if you have two identical 256MB sticks and two identical 512MB sticks and you want to run in dual channel mode... then you should install the 256MB stick on the black slots and the 512MB sticks on the blue slots for example.

The following quote is taken from PCstats.com
Quote:
Dual channel memory works just like RAID on a HDD. Basically the two memory controllers stripe the data accross/between both sticks of RAM to allow faster access. Functionally in single channel memory the one memory controller just assigns address to the RAM and realistaically sees one 'chunk' of RAM being the sum of all the sticks. In dual channel each controller address its stick of RAM independently and allows each stick to be access simultaneously.
Last but not least, check this link for an article about overclocking a P4 1.8a that reached speeds of 2.4 GHz (with an FSB at 133 MHz).

Also check this great guide on how to overclock.

Hope this helps !
My System
(13 items)
 
  
CPUMotherboardOSMonitor
P4 630 3.0GHz Asus P5LD2-VM Windows XP Pro (SP2) Viewsonic VX-724 (LCD) 
PowerCaseMouse
Antec TruePower II 480W TT SViking (modded) Logitech G5 +TT Gamma Pad 
  hide details  
Reply
My System
(13 items)
 
  
CPUMotherboardOSMonitor
P4 630 3.0GHz Asus P5LD2-VM Windows XP Pro (SP2) Viewsonic VX-724 (LCD) 
PowerCaseMouse
Antec TruePower II 480W TT SViking (modded) Logitech G5 +TT Gamma Pad 
  hide details  
Reply
post #3 of 8
nice reply z_one.....except for one problem i'd like to point out....dual channel can not be achieved with three sticks of ram. Dual channel only works in pairs. If you have three sticks only two of those sticks could run in dual channel. With 4 sticks 2 will be running in a dual channel set and the other 2 in a second dual channel set. (eg. slot 1 and 3 run together in dual channel and slot 2 and 4 run together in dual channel however slot 1 and 3 runs seperately to slot 2 and 4)
    
CPUMotherboardGraphicsRAM
E8500 @ 3.2gHz Gigabyte x48-DQ6 BFG 9800GTX+ (G92) OC Edition 2gb Patriot D9s + 2gb G.Skill Pi PC2-8500 1066Mhz 
Hard DriveOptical DriveOSMonitor
2.5 Tb of WD's SATAII (2 x 500 in RAID 0) Pioneer SATA 20x DVDRW Vista Ultimate x64 SP1 *super-tweaked* Panasonic 42" Widescreen Plasma 
KeyboardPowerCaseMouse
Logitech ELITE multimedia 750w Pc Power & Cooling Silencer (Red) Thermaltake Xaser XI Black w/t Window Logitech G5 2000 dpi gaming 
Mouse Pad
Flexiglow :D 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
E8500 @ 3.2gHz Gigabyte x48-DQ6 BFG 9800GTX+ (G92) OC Edition 2gb Patriot D9s + 2gb G.Skill Pi PC2-8500 1066Mhz 
Hard DriveOptical DriveOSMonitor
2.5 Tb of WD's SATAII (2 x 500 in RAID 0) Pioneer SATA 20x DVDRW Vista Ultimate x64 SP1 *super-tweaked* Panasonic 42" Widescreen Plasma 
KeyboardPowerCaseMouse
Logitech ELITE multimedia 750w Pc Power & Cooling Silencer (Red) Thermaltake Xaser XI Black w/t Window Logitech G5 2000 dpi gaming 
Mouse Pad
Flexiglow :D 
  hide details  
Reply
post #4 of 8
Quote:
Originally Posted by Moonhill
May I have some advice to get the most of 1.8A (FSB 400/ L2 512) with Asus P4P800?

I purchased 2 sticks of 256 DDR400 PC3200 ram for dual channel. Dual channel makes difference? Is it possible to set up dual channel with 4 sticks of 256 DDR400 (total 1G)? Thanks
Yes it is, but unlike RDRAM memory, four sticks of DDR memory in dual channel mode will perform worse then 2 DDR will perform worse, because
there is only so much bandwidth allocated for all the four sticks, People saw some serious reduce in performance running four sticks in dual channel mode,
It is still preferable over the single channel mode.
On the other hand you will be able to cancel the page file with 256*4 mb,
which will boost the performance of your system much further then 256*2
with Page file on.

I will also recommend you to enhance the memory timings up to the top...
As it rated for a speed two times faster then what you will run... even with a major OC.
Set the timings to 2-2-2-5 1t command rate, 8T burst length, and the other latency settings to the lowest option. i believe that you will be able to run 1.5T with an overclock to 133 mhz at most.
Hope i helped...
My System
(13 items)
 
  
CPUMotherboardOSMonitor
Opty 148 CACJE DFI LP UT NF4 Ultra-D AD0 XP pro SP2 Slipstreamed Mag 786PFs CRT 
PowerMouse
MI-520atx, 520W Logitech MX518 
  hide details  
Reply
My System
(13 items)
 
  
CPUMotherboardOSMonitor
Opty 148 CACJE DFI LP UT NF4 Ultra-D AD0 XP pro SP2 Slipstreamed Mag 786PFs CRT 
PowerMouse
MI-520atx, 520W Logitech MX518 
  hide details  
Reply
post #5 of 8
yes i also forgot to point somethig out....sorta confused....not sure if hellgy just mentioned it but running 2 512mb stick so there is only one dual channel setup rather than 2 dual channel setups with 4 sicks will run more efficiently
    
CPUMotherboardGraphicsRAM
E8500 @ 3.2gHz Gigabyte x48-DQ6 BFG 9800GTX+ (G92) OC Edition 2gb Patriot D9s + 2gb G.Skill Pi PC2-8500 1066Mhz 
Hard DriveOptical DriveOSMonitor
2.5 Tb of WD's SATAII (2 x 500 in RAID 0) Pioneer SATA 20x DVDRW Vista Ultimate x64 SP1 *super-tweaked* Panasonic 42" Widescreen Plasma 
KeyboardPowerCaseMouse
Logitech ELITE multimedia 750w Pc Power & Cooling Silencer (Red) Thermaltake Xaser XI Black w/t Window Logitech G5 2000 dpi gaming 
Mouse Pad
Flexiglow :D 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
E8500 @ 3.2gHz Gigabyte x48-DQ6 BFG 9800GTX+ (G92) OC Edition 2gb Patriot D9s + 2gb G.Skill Pi PC2-8500 1066Mhz 
Hard DriveOptical DriveOSMonitor
2.5 Tb of WD's SATAII (2 x 500 in RAID 0) Pioneer SATA 20x DVDRW Vista Ultimate x64 SP1 *super-tweaked* Panasonic 42" Widescreen Plasma 
KeyboardPowerCaseMouse
Logitech ELITE multimedia 750w Pc Power & Cooling Silencer (Red) Thermaltake Xaser XI Black w/t Window Logitech G5 2000 dpi gaming 
Mouse Pad
Flexiglow :D 
  hide details  
Reply
post #6 of 8
I did mentioned that issue, but haven't advised him to purchase two steaks of 512 mb, because he already purchased 2 of 256, and considering purchasing another pair.
I've just pointed out the advantages and disadvantages of that...
My System
(13 items)
 
  
CPUMotherboardOSMonitor
Opty 148 CACJE DFI LP UT NF4 Ultra-D AD0 XP pro SP2 Slipstreamed Mag 786PFs CRT 
PowerMouse
MI-520atx, 520W Logitech MX518 
  hide details  
Reply
My System
(13 items)
 
  
CPUMotherboardOSMonitor
Opty 148 CACJE DFI LP UT NF4 Ultra-D AD0 XP pro SP2 Slipstreamed Mag 786PFs CRT 
PowerMouse
MI-520atx, 520W Logitech MX518 
  hide details  
Reply
post #7 of 8
Quote:
Originally Posted by tt_shark
nice reply z_one.....except for one problem i'd like to point out....dual channel can not be achieved with three sticks of ram. Dual channel only works in pairs. If you have three sticks only two of those sticks could run in dual channel. With 4 sticks 2 will be running in a dual channel set and the other 2 in a second dual channel set. (eg. slot 1 and 3 run together in dual channel and slot 2 and 4 run together in dual channel however slot 1 and 3 runs seperately to slot 2 and 4)
Thanks tt_shark but I must tell you that dual channel can be achieved with three sticks of ram.
Check this link where it says:
Quote:
Three DIMMs - Populated Symmetrically
You will get Dual Channel Mode if you populate the memory slots with three DIMMs, such as in this example.
For three-DIMM dual channel mode, the DIMMs in Channel A must match and the DIMM in Channel B (either slot) must be equal in capacity to all of Channel A. While probably not common, this scenario is likely if you upgrade the memory on your system.
My System
(13 items)
 
  
CPUMotherboardOSMonitor
P4 630 3.0GHz Asus P5LD2-VM Windows XP Pro (SP2) Viewsonic VX-724 (LCD) 
PowerCaseMouse
Antec TruePower II 480W TT SViking (modded) Logitech G5 +TT Gamma Pad 
  hide details  
Reply
My System
(13 items)
 
  
CPUMotherboardOSMonitor
P4 630 3.0GHz Asus P5LD2-VM Windows XP Pro (SP2) Viewsonic VX-724 (LCD) 
PowerCaseMouse
Antec TruePower II 480W TT SViking (modded) Logitech G5 +TT Gamma Pad 
  hide details  
Reply
post #8 of 8
Thread Starter 
Thanks for all your precious advice!
My System
(13 items)
 
  
CPUMotherboardOSMonitor
P4 Northwood 2.6c/3.0 P4P800 DELUXE Win XP Pro Sp2 Samsung Syncmaster CX714X 
KeyboardPowerMouse
Slim Aspire ATX-AS420W Logitech PS2 
  hide details  
Reply
My System
(13 items)
 
  
CPUMotherboardOSMonitor
P4 Northwood 2.6c/3.0 P4P800 DELUXE Win XP Pro Sp2 Samsung Syncmaster CX714X 
KeyboardPowerMouse
Slim Aspire ATX-AS420W Logitech PS2 
  hide details  
Reply
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: Intel CPUs
Overclock.net › Forums › Intel › Intel CPUs › Best way to OC 1.8A on Asus P4P800