Overclocking E6600 on Asus P5W DH Deluxe

Ed,
This is how the mem is mentionned in the P5W DH BIOS (AMI): DDR2 xxx. No
mention of the clock frequency. Maybe the same with your P5N32 mobo. If you
want to see in advance, just download the manual for your mobo from the Asus
web site.
Michka

"Ed Medlin" <> wrote in message
news:to%Wh.11968$ et...
>
> "Fishface" <?> wrote in message
> news:EeMWh.1173$Wa.831@trnddc08...
> > Ed Medlin wrote:
> >> Yea, this is all pretty confusing when you start looking in the bios
> >> settings which show settings that are .5 the speed as 533=1066
> >> or 266=1066 quad pumped. I need to find some more reading...
> >
> > The BIOS screens shown here for an EVGA 680i board sure are
> > different from those on my Biostar i965 board.
> > http://www.bjorn3d.com/read_pf.php?cID=1069
> >
> >
> Exactly what I was saying. They may be different on my Asus P5N32-SLI 680i
> board too. It would be easier, at least for an old fart like me, to have
the
> bios reflect in some way the actual memory ratings i.e. 533, 800, 1000 or
> 1066...........Instead of having to do equations to figure it
out........:-)
>
>
> Ed
>
>

'Thomas' wrote:
| Thanks for the numbers, Phil,
|
| But how about :
| E4300 @ 2.7 GHz / FSB 1200 MHz / Memory *600* MHz / 150 Clock / 2:1 CPU
| clock : memory clock ratio
|
| What score does that result in?

What does PC1066 mean, and and what advantage does a 1:1 ratio confer?

I consider the question definitively setteled. The CPU clock : memory clock
ratio is identical to the FSB : memory bus ratio. The nomenclature is
murky, but DDR2 PC1066 memory is qualified to run with a memory bus of 1066
MHz. The CPU clock : memory clock ratio as it appears on nVidia 680i SLI
motherboards represents the FSB : memory bus ratio. DDR2 PC1066 memory is
required to operate at a 1:1 FSB: memory bus ratio (unless lower rated
memory is overclocked.)

For this system
E4300/ EVGA 680i / Patriot SLI-Ready DDR2 PC1066
FSB at 1200 MHz for CPU speed of 2.7 GHz

Three memory benchmarks in SiSoft Sandra 2007 ver 2007.4.11.22
(Memory Latency, Cache and Memory, Memory Bandwidth)
with memory timing held constant for all memory bus speeds

(Memory timing settings in EVGA 680i BIOS)
SLI Memory [Disabled]
tCL: 5
tRCD: 5
tRP: 5
tRAS: 16
CMD: 2T
tRRD: 3
tRC: 21
tWR: 9
tREF: 7.8 ns

Gave the following results with memory bus speeds of 400 MHz, 600 MHz, 800
MHz, 1200 MHz -
__________
Memory bus = 400 MHz

**Memory Latency**
Random 16 MByte 126.6 ns / 341.7 clocks
Linear 16 MByte 15.4 ns / 41.6 clocks

**Cache and Memory**
Combined Index 12548
Speed factor 104.6

**Memory Bandwidth**
Int. Buffered 4401
Float Buffered 4368
Est. Efficiency 46%
____________
Memory bus = 600 MHz

**Memory Latency**
Random 16 MByte 91.8 ns / 247.8 clocks
Linear 16 MBytes 11.7 ns / 31.6 clocks

**Cache and Memory**
Combined Index 15075
Speed factor 68.7

**Memory Bandwidth**
Int. Buffered 5567
Float Buffered 5091
Est. Efficiency 58%
__________
Memory bus = 800 MHz

**Memory Latency**
Random 16 MByte 81.9 ns / 221.2 clocks
Linear 16 MByte 11.1 ns / 29.9 clocks

**Cache and Memory**
Combined Index 166384
Speed factor 53.4

**Memory Bandwidth**
Int. Buffered 6042
Float Buffered 6021
Est. Efficiency 63%
__________
Memory bus = 1200 MHz

**Memory Latency**
Random 16 MByte 63.5 ns / 171.3 clocks
Linear 16 MByte 9.3 ns / 25.4 clocks

**Cache and Memory**
Combined Index 19725
Speed Factor 36.9

**Memory Bandwidth**
Int. Buffered: 6438
Float Buffered 6442
Est. Efficiency 67%
__________

Hope this helps.

Phil Weldon



"Thomas" <> wrote in message
news:462b8cd2$0$11825$.. .
| Phil Weldon wrote:
| > 'Thomas' wrote:
| > > Phil, there's a very simple way of finding out which thesis is
| > > valid; See what the impact on memory performance is by running some
| > > benchmarks with yr memory at 1200 and at 600 'MHz'. This could
| > > clarify alot. I'd like to do it myself, but my stuff won't arive
| > > for some time... Videocard isnt deliverable until May 1st :'(
| >
| > For my system; E4300 / PC1066 (PC8500) memory / nVidia 690i
| > motherboard
| >
| > Stock; E4300 @ 1.8 GHz / FSB 800 MHz / Memory 800 MHz / 200 MHz Clock
| > / 1:1 CPU clock : memory clock ratio
| > SiSoft Sandra 2007 Memory Bandwidth: 4252 MBytes/sec.
| >
| > Overclocked; E4300 @ 2.7 GHz / FSB 1200 MHz / Memory 1200 MHz / 300
| > Clock / 1:1 CPU clock : memory clock ratio
| > SiSoft Sandra 2007 Memory Bandwidth: 6307 MBytes/sec.
|
| Thanks for the numbers, Phil,
|
| But how about :
| E4300 @ 2.7 GHz / FSB 1200 MHz / Memory *600* MHz / 150 Clock / 2:1 CPU
| clock : memory clock ratio
|
| What score does that result in?
|
| --
| Met vriendelijke groeten, Thomas vd Horst.
|
|