What does PAT mean?

[Zebo]

I see some chipsets called (i865) and (i865 + PAT) inside everest, what does the PAT mean?

It's certainly better performing according to those graphs. I assume dual channel DDR?

 

[StrangerGuy]

Performance Acceleration Technology

www.intel.com/design/chipsets/pat.htm

 

[Zebo]

big diff!! check it

 

[RussianSensation]

The Canterwood chipset (i875) was Intels flagship chipset. Intel vaguely named Performance Accelerating Technology or PAT which altered memory timings on the fly, to help get the best you can from your memory. To separate the higher-end Canterwood from Springdale (i865) chipsets, Intel disabled the aggressive timings on the latter boards. However, through BIOS hacks, companies like Abit, Asus, MSI and others have been able to provide "Turbo" settings that enabled these optimizations for "free."

Read bottom of this page (diagram included)

Performance differences using various "PAT-hacked" settings: Link

 

[Zebo]

LOL Check out Intel telling everyone 865PE aftermarket PAT implementation sucks
http://www.intel.com/design/chipsets/865PESit.htm

No wonder, i865PE boards are $80 cheaper than thier equal performing i875 brothers.

 

[Zebo]

:thumbsup: thanks good reads

 

[RussianSensation]

Forgot to mention, I think PAT doesn't work once you start overclocking anything outside of 1:1 ratio. In fact, for me once I increase frequency anything above 200FSB, regardless of CPU:RAM ratio, CPU-Z always says PAT is disabled regardless of setting in the BIOS. So that is probably one shortfall of the "hack" as opposed to actual 875 chipset. I am not sure if all 865 boards react this way, but if they do, once you start overclocking, 875 chipset should faster.

 

[Zebo]

ahhh. I had that IS7 in that reveiw and always ran 5:6 no wonder...

 

[Macro2]

Point After Touchdown

 

[bjc112]

Originally posted by: Macro2
Point After Touchdown

 

[bjc112]

Or Professional Association of Teachers.

 

[Azsen]

Originally posted by: RussianSensation
Forgot to mention, I think PAT doesn't work once you start overclocking anything outside of 1:1 ratio. In fact, for me once I increase frequency anything above 200FSB, regardless of CPU:RAM ratio, CPU-Z always says PAT is disabled regardless of setting in the BIOS. So that is probably one shortfall of the "hack" as opposed to actual 875 chipset. I am not sure if all 865 boards react this way, but if they do, once you start overclocking, 875 chipset should faster.

Yep, I can confirm that as well on my Asus P5P800 (865PE).

 

[Azsen]

Hmm see this page @ xbitlabs, see the "TPM" coming off the southbridge controller??? That's not a Trusted Platform Module is it? A dreaded part of TCPA? :Q

 

[SectorZero]

In networking terms, PAT is what your router does to share your internet connection between multiple computers.

 

[Umberger]

Parallel Axis Theorem. I = i+md^2

 

[LED]

Short for Patricia or Patrick

 

[Budman]

http://www.imdb.com/title/tt0110169/

 

[Matthias99]

Originally posted by: SectorZero
In networking terms, PAT is what your router does to share your internet connection between multiple computers.

Uh, that would be NAT (Network Address Translation). Please don't confuse anybody any further on this sort of thing!

 

[nweaver]

Originally posted by: Matthias99

Originally posted by: SectorZero
In networking terms, PAT is what your router does to share your internet connection between multiple computers.

Uh, that would be NAT (Network Address Translation). Please don't confuse anybody any further on this sort of thing!

PAT can = Protocol address translation

 

[SectorZero]

lol

 

[Matthias99]

Originally posted by: nweaver

Originally posted by: Matthias99

Originally posted by: SectorZero
In networking terms, PAT is what your router does to share your internet connection between multiple computers.

Uh, that would be NAT (Network Address Translation). Please don't confuse anybody any further on this sort of thing!

PAT can = Protocol address translation

Never heard of it being referred to by that name. A search for "protocol address translation" on google turned up nothing. Closest thing I could find was this

Port Address Translation (PAT)

Basic Definition:
Similar to NAT, but where data from different IP addresses are altered to share the same source IP address. In order that the data is still distinguishable (and the replies can be routed back correctly) the source port is varied in some defined way

This is not what most consumer routers do.

 

[SectorZero]

Here, do some reading.

http://techrepublic.com.com/5100-6265_11-1053789.html#

 

[Matthias99]

Originally posted by: SectorZero
Here, do some reading.

http://techrepublic.com.com/5100-6265_11-1053789.html#

I know what port address translation is. I have no clue what "protocol address translation" would be, since it does not seem to be a standard of any sort. That link doesn't mention the term either.

Most routers (especially consumer ones) do just straight-up NAT.

 

[SectorZero]

You're right in pointing out that PAT is Port address Translation.
But ... What you're thinking of as NAT is more accuratly described as PAT, or nat overloading.

Another bit of reading from the excellent howstuffworks.com web site

http://computer.howstuffworks.com/nat.htm