MT/S - what does it mean?

[Asfand Yar Qazi]

Hi,

I see some motherboard descriptions that have something along the lines of
'2000 MT/s' or '1600 MT/s'. What does MT/s mean? What would be the
difference in performance between 2000 and 1600 MT/s?

Thanks

 

[Wes Newell]

I see some motherboard descriptions that have something along the lines of
'2000 MT/s' or '1600 MT/s'. What does MT/s mean? What would be the
difference in performance between 2000 and 1600 MT/s?

Million(s of) Transfers per Second. Assuming you're talkig about the
system bus (HT link), in reality it means nothing to very little. Since
moving the memory bus to it's own dedicated bus. The system bus (FSB) has
very little to do for the power it has.

 

[Wes Newell]

I see some motherboard descriptions that have something along the lines of
'2000 MT/s' or '1600 MT/s'. What does MT/s mean? What would be the
difference in performance between 2000 and 1600 MT/s?

I should have pointed out that the 1600 one would be a socket 754 board,
and the 2000 one would be either 940, 939, or AM2 (which is also 940 pins
but not compatible with earlier 940 boards).

 

[Scott Lurndal]

Hi,

I see some motherboard descriptions that have something along the lines of
'2000 MT/s' or '1600 MT/s'. What does MT/s mean? What would be the
difference in performance between 2000 and 1600 MT/s?

Megatransfers per second. A method of measuring the throughput of
the Direct Connect Architecture hypertransport ports. 2000 MT/s
corresponds to a 1000 MHz ht clock speed, 1600MT/s is a 800Mhz clock.

scott

 

[tic toc]

Megatransfers per second. A method of measuring the throughput of
the Direct Connect Architecture hypertransport ports. 2000 MT/s
corresponds to a 1000 MHz ht clock speed, 1600MT/s is a 800Mhz clock.

scott

info clocked twice per cycle ?

dual pumped and all that jazz.

 

[Asfand Yar Qazi]

info clocked twice per cycle ?

dual pumped and all that jazz.

How much faster would having a 2000MT/s bus be over a 1600MT/s bus?

 

[Bill]

How much faster would having a 2000MT/s bus be over a 1600MT/s bus?

I don't believe it's any faster in actual use.

I have an x2 3800+ on my 939 board which is overclocked 25%, so I had to
slow the HyperTransport link to remain 100% stable. Right now it's set
at 3x (250 clock rate) which gives me a rate of 1500 MT/s. At 4x the
rate is correctly set at the maximum rate of 2000 MT/s, but then Prime95
stability tests will fail.

I've tried various configurations and done benchmark tests, and have
found that I can lower the rate to about 1400 MT/s with negligible
effect on performance. Anything over 1500 is just fluff really.

 

[Scott Lurndal]

I don't believe it's any faster in actual use.

I have an x2 3800+ on my 939 board which is overclocked 25%, so I had to
slow the HyperTransport link to remain 100% stable. Right now it's set
at 3x (250 clock rate) which gives me a rate of 1500 MT/s. At 4x the
rate is correctly set at the maximum rate of 2000 MT/s, but then Prime95
stability tests will fail.

I've tried various configurations and done benchmark tests, and have
found that I can lower the rate to about 1400 MT/s with negligible
effect on performance. Anything over 1500 is just fluff really.

It really only matters for CPU to CPU links in multi-socket
systems, and perhaps if your non-coherent link(s) bridge to 16
fully used lanes of PCI-express. PCI, PCI-X won't touch
the bandwidth of a single HT link, so if that's all you got,
the speed doesn't really matter.

scott

 

[Bill]

How much faster would having a 2000MT/s bus be over a 1600MT/s bus?

400MT/S Duh.

Bill

 

[Asfand Yar Qazi]

It really only matters for CPU to CPU links in multi-socket
systems, and perhaps if your non-coherent link(s) bridge to 16
fully used lanes of PCI-express. PCI, PCI-X won't touch
the bandwidth of a single HT link, so if that's all you got,
the speed doesn't really matter.

scott

Ah, that's good to know - I won't feel guilty over using a socket 754 mobo for
my 'secondary' computer then (i.e. running a few servers - dhcpd, named - as
well as Azureus and perhaps an enemy territory game server etc).

Obviously my primary computer will be an Opteron 165 OC'ed to atleast 2.4GHz
using OCZ value VX memory on a DFI motherboard - but that's for another
discussion

Thanks all