overclock core2duo with DDR1 memory?

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Hi everyone,

I just bought a core 2 duo 1.86 with a board by ECS that allows you to use
DDR1 and AGP (for us poor bastards that can't afford new memory and video
cards) and I know this is supposed to be a great overclocker, I am sure
however I am limited with overclocking by my memory.(but I already have
2gigs of the stuff)

Does anyone have any idea what kind of overclocking potential I have using
old DDR1 memory? I mean what kind of speeds should I expect?
I have been out of the game a while as you can tell by my current setup. I
was (am still) running my old Athlon 64 3000+ chip until I can decide to
either sell the new stuff or keep it. The only reason I might keep what I
have is that if I can not expect a pretty dramatic improvement over my
current setup I may sell the new chip and board. Old system by the way is
running stock speeds

I just got a KILLER deal at Fry's and bought on impulse, basically I got the
chip (retail with fan) AND board for 169 bucks. I thought it was a good
deal....based on newegg prices....it would have been about 233.00 delivered
from Newegg......for the same board and chip.

Re: overclock core2duo with DDR1 memory?

No one wrote:
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Any chance you could provide a URL for the product ? It might
improve the odds of getting a good answer. (For example, using
the motherboard model number, you might be able to find
a downloadable manual.)

As long as a chipset has dividers for RAM, you can overclock
the FSB, and keep the RAM within spec. For example, on the
computer I'm typing on, the divider ratios are 1:1, 5:4, 3:2.
With the 3:2 ratio, I can keep my standard RAM in spec, and
overclock by 50%. With the 5:4 ratio, I can overclock by
25% and keep the RAM in spec. By means of divider ratios,
many things are possible. (Right now, my RAM is 1:1 and 15%
over spec :-) )

Overclocking requires a good BIOS, with a rich set of
controls. A cheap motherboard with a non-overclocker
BIOS, even if it has the world's finest chipset, is
useless. Many people, for example, expect to overclock
their Dell, only to find there are no settings in the
BIOS they can use to overclock. That is one reason to
download the user manual for the motherboard - if there
is no info on the BIOS in the manual, or if the BIOS
controls are minimal, then you don't buy the product.


Re: overclock core2duo with DDR1 memory?

Thanks for the reply, the board has some overclocking tools that must be
flashed to the bios and are readly available from ECS. I have not done this
yet as the board and chip have not even been opened yet, but the specs can
be found with the provided link, and I also posted them.
Thanks again,
Board specs:

Also stated as follows:

Model Brand ECS Model P4M800PRO-M (V2.0) Supported CPU CPU Socket Type
Socket T (LGA 775) CPU Type Core 2 Duo/Pentium D/Pentium 4/Celeron D FSB
1066/800MHz Supported CPU Technologies Hyper-Threading Technology Chipsets
North Bridge VIA P4M800 PRO South Bridge VIA VT8237R Plus Memory Number of
DDR Slots 2 x 184pin DDR Standard DDR 400 (PC 3200) Number of DDR2 Slots 2 x
240pin DDR2 Standard DDR2 533 Maximum Memory Supported 2GB Expansion Slots
AGP Slots 1 x AGP 4X/8X PCI Express x16 None PCI Slots 3 Other Slots 1 x CNR
Storage Devices PATA 2 x ATA100 up to 4 Devices SATA 1.5 Gb/s 2 SATA RAID
0/1 Onboard Video Onboard Video Yes Onboard Video Chipset S3 Graphics
UniChrome Pro IGP Onboard Audio Audio Chipset Realtek ALC655 Audio Channels
6 Channels Onboard LAN LAN Chipset VIA VT6103L Max LAN Speed 10/100Mbps Rear
Panel Ports PS/2 2 COM 1 LPT 1 VGA 1 USB 4 x USB 2.0 Audio Ports 3 Ports
Onboard USB Onboard USB 4x USB 2.0 Physical Spec Form Factor Micro ATX
Dimensions 9.6" x 8.6" Features Power Pin 24 Pin Packaging Package Contents
P4M800PRO-M (V2.0)
User Manual
Driver Disk
Rear I/O Panel Shield
FDD Cable
SATA Cable
Power Cable

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Re: overclock core2duo with DDR1 memory?

No one wrote:
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The customer reviews from the same page, will tell you a lot about the board.

Now, one of the customer reviews claims the chipset is already overclocked,
just to reach FSB1066. VIA has changed its feature set for the chipsets,
over time. The P4M800 Pro used to be rated for FSB800, and now is rated
for FSB1066. If another manufacturer did that, they would change the chip
name a bit, to alert users to the improvement. You cannot tell from this
information, whether the chip was respun to reach the higher FSB, or
they just discovered that they could barely make it, so they updated the


266MHz is the nominal frequency, to get FSB1066. One user claims to have
reached 300MHz, and that means a 13% overclock. At that low level of overclock,
you probably don't have to worry much about the RAM divider. Try raising
Vdimm a bit, and increase the memory settings by one notch. (That is how
I got my memory to overclock 15%, by changing the timings from 2-2-2-6,
to 3-3-3-8.) [Well, there are no memory settings, so just adjust the
memory frequency from DDR400 to DDR333 instead. That is enough for up
to 20% overclock.]

According to those charts, it looks like the Northbridge does have some
memory dividers. You would select a lower memory clock or memory frequency
setting, to get the divider to change.

This is what the manual lists for adjustments:

Manufacturer: Intel
CPU Over-clocking Func. Disabled
CPU Frequency: 200MHz
DRAM Frequency Auto
Memory Voltage Normal
CPU Voltage Normal
AGP Voltage +0.05V

The manual doesn't explain the "Over-clocking" function. Perhaps in the
enabled state, the next field can be changed. The DRAM Frequency can be
changed, and that is how you would keep the memory in spec while
overclocking the FSB. (Increasing the FSB, increases both the FSB
and the memory clock. That is why a means is needed to drop the memory
clock, to compensate.) I don't see any memory timing fields there, so
I hope the BIOS computes new values for timings properly when the
memory divider is changed (you can verify this with the CPUZ
program from cpuid.com) .

The customer reviews also mention that the board is single channel.
It looks like the chipset has two busses, but one is for the
DDR sticks, and the other is for DDR2 sticks. Usually, you cannot
occupy both at the same time, so effectively it is a single
channel board.


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