45nm / DDR3 era Spi discuz.

[VictorWang]

Wa! Super Fast!
whats motherboard?
whats ram? and voltage??

Asus Max Extreme.
Cellshocks DDR3 1800, 2.2v

yeah i've played a little and found similar things

i have to say that bioses are still in early stages which will improve performance once they become more stable

i've mainly played with GB boards and the dividers are pretty spotty and hard to tweak but when you hit the right ratio speeds are REALLY good >> 45K 1M efficiency non tweaked with memory not maxed out yet at 5GHz....

i am looking forward to another chipset manufacturer introducing their chipsets which will have dividers that can allow RAM to be maxed out at stock FSB as well as any other frequency. That is one thing that bugs me about Intel chipsets.....to take advantage of the new RAM you have to hit high FSB and with quads on the way most people will be maxing out around 450 FSB which is just not enough

FSB plays a big role in SuperPi so we really need those E8500 chips to start hitting 600 to see where we're at and whether it's the FSB as well that is lacking

Victor is right though tweaking isn't as effective....i tried mainly 1M stuff but i see 32M is definitely not as good as it used to be with lower cache CPU from you and hipro

ratio is a problem.
fsb is a problem especially on 45nm both wolf/yorkies
and bios/spd seems also have some problems
maxmem gives only about 1 or 2sec improvement
copzy waza only about 2sec or 3sec.

Simply put, the effect is the same as what we saw from going from A64 to Conroe. SuperPi is much less tweakable, since most of our tweaks deal with memory. With a larger cache, there is much less memory access.

we might need to tweak "write" peformance while as copy/cache tweak "Read".
so a Good HDD or I-Ram is needed.
less time and cpu usage when pi_32m "write" data from Ram to HDD might be give another 2 or 3sec faster.

Victor,

I cannot speak from own experience cuz i don't have a 45nm cpu nor do i have DDR3.
From observation it looks like the large cache on the 45nm cpu's is responsible for the great performance in SuperPi but the downside is that tweaks like copy-waza take less effect.

Looking back at A64 days with 512mb cache CPU's, copy-waza gave some impressive gains, even in 1M, which reinforces the feeling that more cache means less gain from CW.

For DDR3, it looks like this is only taking a lead over DDR2 when ran at outrages speeds and relative tight timings.
Running more relaxed than 6-7-7 on DDR3 does not give any gain over DDR2 imo.

i tried lots of different mem_timing combination.
find the tighten tRP and tRAS will help nth but results in un-stable and might be slower.
but tweak sub_timings usually gives a boost (about 2sec).