rec.autos.simulators

What are the best settings to get the best speed from this set-up?
(mainly used for ***, so speed and frame rates are important)

I have built many pcs for myself and friends, and have overclocked all
of my own pcs, and I've not blown one up yet, but, I always get confused
by the memory settings, especially the bit where the memory speed is
doubled (DDR2) and is a ratio of the cpu speed?

In my current set-up I use a dram setting of 533 which gives me dram
clock speed of 400 (800 ddr) but where does the 533 come from? or what
is it a reading of or related to?And why in the Crucial memory spec
(above) are there two different speeds (6400 and 800)? where does the
6400 fit in?

I've got my current pc up to 3200mhz with the current settings (default
speed is 9 x 272 = 2400mhz) easily and it whizzes along nicely, but I'm
sure I'm not getting the best memory settings, and hence could get more
speed....

These are the current settings in my ABIT m/b bios....
========================
Screen = OC Guru:

External clock = 400mhz (options = various)
Multiplier = 8 (options = various)
CPU speed = (400 x 8) = 3200mhz
NB strap cpu as = psb1066 (options =by cpu, psb1066, psb533, psb800)
DRAM spec (cpu:dram) = 533 (options = by spd, ddr2 533, ddr2 667, ddr2 800)
Est new dram clock = 400mhz (ddr2 800)
PCI Express clock = 100mhz
CPU core Voltages = 1.3250v (options = various >1.3250v)
DDR2 voltage = 2.00v

Screen = advanced bios features:

CPU feature: -
Thermal control = enabled (options = enable or disable)
Limit CPUID maxval = disabled = (for WINXP)
CIE function = disabled = (options = auto or disabled)
Execute disable bit = enabled (options = enabled or disabled
Virtualisation technology = disabled (options = enabled or disabled)
E1ST function = disabled (options = enable or disable)

Screen = advanced chipset features:

Dram timing = by spd (options = by spd or manual)
Cas Latency (tcl) = auto (options = auto or 3 to 6)
Ras# to Cas delay (tRCD) = auto (options = auto or 1 to 15)
RAS# precharge (tRP) = auto (options = auto or 1 to 15)
Precharge delay (tRAS = auto (options = auto or 1 to 31)
Command rate = auto (options = auto or 2T or 1T)
Refresh cycle time (tRFC) = auto (options = auto or 1 to 63)
==========================

What memory timings should I use in the advanced chipset bios screen?
and what memory settings should I use in the OC Guru screen.

Any info / explanations gratefully received, thanx...

8-)

Depending on your memory, althouh reports a default set of timing
paramters for cas, ras, ... in the form 5 5 5 15, some memories
can be sped up if you increase the dram voltage from 1.8 volts
to 2.0 volts or so (selectable in the bios). On my motherboard,
the DDR2 memory is 667hz, with timing at 4-4-4-10 at 2.0 volts.

For DDR2 the common clock speeds are 533mhz, 667mhz, and 800mhz.
There's no standard for how fast the cas - ras timings can be,
or the required voltage.

You need to confirm your memories are designe to operate faster
at a higher voltage.

Here's the thing...  I wasn't even overclocking!  As soon as I would put the
machine into a strenuous operation, such as ripping CD's or DVD's, the RAM
would fail.  Permanently.

It's been a couple of years but you can search on hardocp.com forums for the
issues a lot of us had with this RAM.

Just be careful.  If you go too far, it may not be as simple to fix as
bringing the overclock back down.

-Larry

DDR2 at 675mhz (good enough for 667mhz):

http://www.kingston.com/hyperx/products/khx_ddr2.asp#675d

Fastest memories on this list appear to be the 800mhz 3-3-3-10 memories,
at 2.30 to 2.35 volts. Although they list memories faster than 800mhz,
I'm not aware of PC motherboards that support this, just components like
video cards.

I seem to remember some card that start off with 2, 2-x-x-x and these
would be faster still.