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How do I test memory transfer rates?



 
 
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  #1  
Old February 5th 07, 07:33 PM posted to alt.comp.periphs.videocards.nvidia
[email protected]
external usenet poster
 
Posts: 40
Default How do I test memory transfer rates?

Is there a benchmark program that can test my video cards memory
transfer rate?

  #2  
Old February 6th 07, 02:23 AM posted to alt.comp.periphs.videocards.nvidia
First of One
external usenet poster
 
Posts: 312
Default How do I test memory transfer rates?

I haven't seen one. And even if such a program existed, its usefulness would
be questionable at best. Real-world performance depends on the memory
controller design. For example, a 4x32-bit "crossbar" interface is faster
than an 1x128-bit interface in most games, even though the theoretical
transfer rates are identical. Other significant factors include memory
timings, color/Z-buffer compression, and hidden-surface removal (think
Geforce 8800's Early-Z or Radeon's Hyper-Z).

On the other hand, if all you need to do is confirm, for example, your card
has a full 128-bit memory interface rather than a cut-down 64-bit "LE"
interface, then a program like Everest will tell you.

--
"War is the continuation of politics by other means.
It can therefore be said that politics is war without
bloodshed while war is politics with bloodshed."

wrote in message
oups.com...
Is there a benchmark program that can test my video cards memory
transfer rate?



  #3  
Old February 6th 07, 06:19 PM posted to alt.comp.periphs.videocards.nvidia
[email protected]
external usenet poster
 
Posts: 40
Default How do I test memory transfer rates?

On Feb 5, 6:23 pm, "First of One" [email protected] wrote:
I haven't seen one. And even if such a program existed, its usefulness would
be questionable at best. Real-world performance depends on the memory
controller design. For example, a 4x32-bit "crossbar" interface is faster
than an 1x128-bit interface in most games, even though the theoretical
transfer rates are identical. Other significant factors include memory
timings, color/Z-buffer compression, and hidden-surface removal (think
Geforce 8800's Early-Z or Radeon's Hyper-Z).

On the other hand, if all you need to do is confirm, for example, your card
has a full 128-bit memory interface rather than a cut-down 64-bit "LE"
interface, then a program like Everest will tell you.

--
"War is the continuation of politics by other means.
It can therefore be said that politics is war without
bloodshed while war is politics with bloodshed."

wrote in message

oups.com...

Is there a benchmark program that can test my video cards memory
transfer rate?



Ok. I just seem to see this measurement often when video cards are
compared. I didn't know if this was a common benchmark test or not.

  #4  
Old February 7th 07, 01:05 AM posted to alt.comp.periphs.videocards.nvidia
First of One
external usenet poster
 
Posts: 312
Default How do I test memory transfer rates?

The "measurement" of memory bandwidth, as written in reviews, is always
calculated theoretically. For example, a card with a 256-bit memory
interface, with the RAM running at 1.2 GHz effective, would have 256 x 1.2 /
8 = 38 GB/s of memory bandwidth.

--
"War is the continuation of politics by other means.
It can therefore be said that politics is war without
bloodshed while war is politics with bloodshed."

wrote in message
oups.com...
On Feb 5, 6:23 pm, "First of One" [email protected] wrote:
I haven't seen one. And even if such a program existed, its usefulness
would
be questionable at best. Real-world performance depends on the memory
controller design. For example, a 4x32-bit "crossbar" interface is faster
than an 1x128-bit interface in most games, even though the theoretical
transfer rates are identical. Other significant factors include memory
timings, color/Z-buffer compression, and hidden-surface removal (think
Geforce 8800's Early-Z or Radeon's Hyper-Z).

On the other hand, if all you need to do is confirm, for example, your
card
has a full 128-bit memory interface rather than a cut-down 64-bit "LE"
interface, then a program like Everest will tell you.

--
"War is the continuation of politics by other means.
It can therefore be said that politics is war without
bloodshed while war is politics with bloodshed."

wrote in message

oups.com...

Is there a benchmark program that can test my video cards memory
transfer rate?



Ok. I just seem to see this measurement often when video cards are
compared. I didn't know if this was a common benchmark test or not.



  #5  
Old February 7th 07, 05:41 PM posted to alt.comp.periphs.videocards.nvidia
[email protected]
external usenet poster
 
Posts: 40
Default How do I test memory transfer rates?

On Feb 6, 5:05 pm, "First of One" [email protected] wrote:
The "measurement" of memory bandwidth, as written in reviews, is always
calculated theoretically. For example, a card with a 256-bit memory
interface, with the RAM running at 1.2 GHz effective, would have 256 x 1.2 /
8 = 38 GB/s of memory bandwidth.

--
"War is the continuation of politics by other means.
It can therefore be said that politics is war without
bloodshed while war is politics with bloodshed."

wrote in message

oups.com...

On Feb 5, 6:23 pm, "First of One" [email protected] wrote:
I haven't seen one. And even if such a program existed, its usefulness
would
be questionable at best. Real-world performance depends on the memory
controller design. For example, a 4x32-bit "crossbar" interface is faster
than an 1x128-bit interface in most games, even though the theoretical
transfer rates are identical. Other significant factors include memory
timings, color/Z-buffer compression, and hidden-surface removal (think
Geforce 8800's Early-Z or Radeon's Hyper-Z).


On the other hand, if all you need to do is confirm, for example, your
card
has a full 128-bit memory interface rather than a cut-down 64-bit "LE"
interface, then a program like Everest will tell you.


--
"War is the continuation of politics by other means.
It can therefore be said that politics is war without
bloodshed while war is politics with bloodshed."


wrote in message


groups.com...


Is there a benchmark program that can test my video cards memory
transfer rate?


Ok. I just seem to see this measurement often when video cards are
compared. I didn't know if this was a common benchmark test or not.


Oh, got it. Makes sense now. Is there a small simple program to
benchmark video cards? I only see the larger 3DMark, etc.

  #6  
Old February 9th 07, 06:24 AM posted to alt.comp.periphs.videocards.nvidia
First of One
external usenet poster
 
Posts: 312
Default How do I test memory transfer rates?

I am sure there are small simple programs. However, again, such benchmarks
bear no resemblance to real-world gameplay. Even the large 3DMark suite
stopped being realistic after the 2001 edition.

There's a burn-in function in ATiTool, with a frame-per-second display.
Consider it the simplest benchmark available. :-)

--
"War is the continuation of politics by other means.
It can therefore be said that politics is war without
bloodshed while war is politics with bloodshed."

wrote in message
oups.com...
On Feb 6, 5:05 pm, "First of One" [email protected] wrote:
The "measurement" of memory bandwidth, as written in reviews, is always
calculated theoretically. For example, a card with a 256-bit memory
interface, with the RAM running at 1.2 GHz effective, would have 256 x
1.2 /
8 = 38 GB/s of memory bandwidth.

--
"War is the continuation of politics by other means.
It can therefore be said that politics is war without
bloodshed while war is politics with bloodshed."

wrote in message

oups.com...

On Feb 5, 6:23 pm, "First of One" [email protected] wrote:
I haven't seen one. And even if such a program existed, its usefulness
would
be questionable at best. Real-world performance depends on the memory
controller design. For example, a 4x32-bit "crossbar" interface is
faster
than an 1x128-bit interface in most games, even though the theoretical
transfer rates are identical. Other significant factors include memory
timings, color/Z-buffer compression, and hidden-surface removal (think
Geforce 8800's Early-Z or Radeon's Hyper-Z).


On the other hand, if all you need to do is confirm, for example, your
card
has a full 128-bit memory interface rather than a cut-down 64-bit "LE"
interface, then a program like Everest will tell you.


--
"War is the continuation of politics by other means.
It can therefore be said that politics is war without
bloodshed while war is politics with bloodshed."


wrote in message


groups.com...


Is there a benchmark program that can test my video cards memory
transfer rate?


Ok. I just seem to see this measurement often when video cards are
compared. I didn't know if this was a common benchmark test or not.


Oh, got it. Makes sense now. Is there a small simple program to
benchmark video cards? I only see the larger 3DMark, etc.



  #7  
Old February 12th 07, 05:27 PM posted to alt.comp.periphs.videocards.nvidia
[email protected]
external usenet poster
 
Posts: 40
Default How do I test memory transfer rates?

On Feb 8, 10:24 pm, "First of One" [email protected] wrote:
I am sure there are small simple programs. However, again, such benchmarks
bear no resemblance to real-world gameplay. Even the large 3DMark suite
stopped being realistic after the 2001 edition.

There's a burn-in function in ATiTool, with a frame-per-second display.
Consider it the simplest benchmark available. :-)

--
"War is the continuation of politics by other means.
It can therefore be said that politics is war without
bloodshed while war is politics with bloodshed."

wrote in message

oups.com...

On Feb 6, 5:05 pm, "First of One" [email protected] wrote:
The "measurement" of memory bandwidth, as written in reviews, is always
calculated theoretically. For example, a card with a 256-bit memory
interface, with the RAM running at 1.2 GHz effective, would have 256 x
1.2 /
8 = 38 GB/s of memory bandwidth.


--
"War is the continuation of politics by other means.
It can therefore be said that politics is war without
bloodshed while war is politics with bloodshed."


wrote in message


groups.com...


On Feb 5, 6:23 pm, "First of One" [email protected] wrote:
I haven't seen one. And even if such a program existed, its usefulness
would
be questionable at best. Real-world performance depends on the memory
controller design. For example, a 4x32-bit "crossbar" interface is
faster
than an 1x128-bit interface in most games, even though the theoretical
transfer rates are identical. Other significant factors include memory
timings, color/Z-buffer compression, and hidden-surface removal (think
Geforce 8800's Early-Z or Radeon's Hyper-Z).


On the other hand, if all you need to do is confirm, for example, your
card
has a full 128-bit memory interface rather than a cut-down 64-bit "LE"
interface, then a program like Everest will tell you.


--
"War is the continuation of politics by other means.
It can therefore be said that politics is war without
bloodshed while war is politics with bloodshed."


wrote in message


groups.com...


Is there a benchmark program that can test my video cards memory
transfer rate?


Ok. I just seem to see this measurement often when video cards are
compared. I didn't know if this was a common benchmark test or not.


Oh, got it. Makes sense now. Is there a small simple program to
benchmark video cards? I only see the larger 3DMark, etc.


Sweet, thanks.

 




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