What's a good memory performance speed (mb/sec) these days?

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Comp Guy

I'm optimizing the memory and cpu clock settings on an Asus P5NSLI
motherboard and have been using memtest86+ (v 1.70).

The board has a Core2 E6300 (1.86 ghz) clocked to 2.04 ghz (with stock
cooler) and I'm getting about 3335 mb/sec for the memory speed on
memtest. What sort of memory performance speeds are typical these
days in mid to high-performance and tweeked systems?
 
'Comp Guy' wrote:
| I'm optimizing the memory and cpu clock settings on an Asus P5NSLI
| motherboard and have been using memtest86+ (v 1.70).
|
| The board has a Core2 E6300 (1.86 ghz) clocked to 2.04 ghz (with stock
| cooler) and I'm getting about 3335 mb/sec for the memory speed on
| memtest. What sort of memory performance speeds are typical these
| days in mid to high-performance and tweeked systems?
_____

The memory bandwidth is affected by
memory type
FSB speed
CPU:Memory clock ratio
motherboard
CPU
in that order.

Download the free version of SiSoft Sandra from
http://www.sisoftware.co.uk/
and the free version of Everest from
http://www.lavalys.com/
and compare.

Be aware that

* different test programs can give different results

* DDR2 memory generally available is not fast enough to run at the full FSB
speed and a reduced CPU : Memory clock ratio must be used

* larger L2 caches can give large performance increases, depending on the
applications.



There are free diagnostic programs in addition to SiSoft Sandra, and many
many memory subsystem comparisons can be found at websites like Tom's
Hardware, Anand Tech, X-bit Labs, Extreme Tech, Sharky Extreme ...

Also a higher CPU speed increases the system computing power much more than
smaller memory delay timings. Go for a significant CPU overclock before
worrying about shortened memory delay timing. Core2 E CPUs are the most
overclockable of all Intel CPU; easily capable of MUCH more than a 10%
overclock (50% is easy, 75% has been done without exotic cooling.

Phil Weldon


| I'm optimizing the memory and cpu clock settings on an Asus P5NSLI
| motherboard and have been using memtest86+ (v 1.70).
|
| The board has a Core2 E6300 (1.86 ghz) clocked to 2.04 ghz (with stock
| cooler) and I'm getting about 3335 mb/sec for the memory speed on
| memtest. What sort of memory performance speeds are typical these
| days in mid to high-performance and tweeked systems?
 
Comp said:
I'm optimizing the memory and cpu clock settings on an Asus P5NSLI
motherboard and have been using memtest86+ (v 1.70).
Click to expand...
The board has a Core2 E6300 (1.86 ghz) clocked to 2.04 ghz (with stock
cooler) and I'm getting about 3335 mb/sec for the memory speed on
memtest. What sort of memory performance speeds are typical these
days in mid to high-performance and tweeked systems?
Click to expand...

It's hardly something most people care about, even enthusiasts. That's
because it's such an artificial measurement.

Yousuf Khan
 
Yousuf Khan said:
It's hardly something most people care about, even enthusiasts. That's
because it's such an artificial measurement.
Click to expand...

I get just under 6000MB/sec on my 3.6GHz P4 Northwood
(dual channel/240FSB/1:1).
 
Icky said:
I get 7009MB/s on Core2Duo E6600 @3.2GHz, (DDR2/222MHz FSB/4:5)=890MHz
Click to expand...


All of those measurements depend on what software is measuring it, and
often is even dependent cache size.

Yousuf Khan
 
All of those measurements depend on what software is measuring
it, and often is even dependent cache size.
Click to expand...

Exactly. The OP was referring to the memory speed as shown by
Memtest86+ (v 1.70), which is likely unbuffered. For the record,
my Biostar 965PT with E6400 at 8 x 380 with Micron DDR2-667
and 3-3-3-12 timings scores 3458 MB/s. I'm not sure which
version of Memtest86+ I used as it came integrated in the BIOS
and I failed to notice.
 
For the record, my Biostar 965PT with E6400 at 8 x 380 with
Micron DDR2-667 and 3-3-3-12 timings scores 3458 MB/s.
I'm not sure which version of Memtest86+ I used as it came
integrated in the BIOS and I failed to notice.
Click to expand...

The BIOS integrated Memtest86+ is version 1.65. For the hell
of it, I cranked it up to 450 x 7 (4-4-4-12) and the bandwidth
jumped to 4017 MB/s.
 
Fishface said:
The BIOS integrated Memtest86+ is version 1.65. For the hell
of it, I cranked it up to 450 x 7 (4-4-4-12) and the bandwidth
jumped to 4017 MB/s.
Click to expand...

Ok, weird. I used the feature of the BIOS which saves and
recalls settings. When I recalled the 380 x 8 setting, the
bandwidth is now 3958 MB/s. I know what you're thinking--
a '4' does look a little like a '9...' I'm certain it was a 4.
 
Comp said:
I'm optimizing the memory and cpu clock settings on an Asus P5NSLI
motherboard and have been using memtest86+ (v 1.70).
Click to expand...
Since you have an ASUS, look for the BIOS to have the ability to o/c the
memory separately from the CPU. You may be able to boost the speed even
more.
 
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