1T and 2T

[chuckm]

What's the difference and will 1T only work with 1G modules.

Thanks
Chuck

 

[GuitarDaddy]

1T is faster and works with all module sizes as far as I know. 1T will not work with four sticks of ram, it must be 2T

 

[myocardia]

Originally posted by: GuitarDaddy
1T is faster and works with all module sizes as far as I know. 1T will not work with four sticks of ram, it must be 2T

Don't forget that it also won't work with any motherboard that has an Intel chipset, either, even with only one stick of RAM.

 

[catalysts17az]

i thought the 1T and 2T stuff was just an AMD thing because of the integrated memory controller? Please shed some light on this, as i thought Intel was immune from this.

 

[coolpurplefan]

I believe 1T is about 3% faster than 2T. And I think it's easier to get 1T on socket 939 than on socket 754 (will work with certain cores like clawhammer). In any case, the RAM manufacturer should have the timings listed on their site.

As far as I know, for DDR1, Kingston HyperX and OCZ Platinum can both do 1T. 🙂

 

[myocardia]

Originally posted by: catalysts17az
i thought the 1T and 2T stuff was just an AMD thing because of the integrated memory controller? Please shed some light on this, as i thought Intel was immune from this.

It would be an AMD-only thing, if only Intel made chipsets for the cpu's, because you don't even have the choice with an Intel chipset. All nVidia chipsets have 1T as a choice, though, including their offerings for Intel processors.

 

[Yellowbeard]

Command rate is actually a chipset function and not a RAM timing or parameter FWIW. Also, command rate is adjustable on some Intel chipsets now. However, I think it is still a shaky setting and is best left to 2T or AUTO on any Intel chipset based board.

 

[alkemyst]

Originally posted by: GuitarDaddy
1T is faster and works with all module sizes as far as I know. 1T will not work with four sticks of ram, it must be 2T

Depends on board and chipset.

 

[myocardia]

Originally posted by: Yellowbeard
Also, command rate is adjustable on some Intel chipsets now. However, I think it is still a shaky setting and is best left to 2T or AUTO on any Intel chipset based board.

I didn't realize that. Which one, the 965?

 

[Yellowbeard]

Originally posted by: myocardia

Originally posted by: Yellowbeard
Also, command rate is adjustable on some Intel chipsets now. However, I think it is still a shaky setting and is best left to 2T or AUTO on any Intel chipset based board.

I didn't realize that. Which one, the 965?

Yes, ABIT tried it on their 965 Quad board, I think the review showing it is here at AT. However, it proved unstable. But, I have no idea if that is attributable to ABIT or the Intel chipset. I have heard ASUS is doing it also but I cannot verify.

It is an effective setting on the 680i boards if you get RAM that will do decent speed and latencies at a sane voltage AND do 1T. The jury is still out on how it will do on the Intel chipsets.

 

[Modular]

I was going to make a similar thread, but I'll just HJ this one 😉

I have some generic RAM installed in an nForce 4 MSI 939 board. It's running at 2T now.

Are there any risks in forcing 1T and seeing if it will POST? The RAM is PC2700 333mhz. 2x256 in Dual Channel.

 

[FireChicken]

I was told that as far as damage to your RAM, running 1T will not hurt it

I would lower your ram frequency then try setting at 1T. My ram would not run at stock speed at 1T. Also it might need more voltage.

 

[ineedaname]

1T gives more than a 5% bonus to 2T.

I'm running 900mhz 1t and its faster than 1100mhz 2t

currently all intel P965 chipsets do NOT support 1T

 

[SlowSpyder]

I have a socket 939 board. I leave that setting at auto. When I ran 2x512MB of ram, CPU-Z showed my command rate as 1T. Now that I went to 4x512MB it defaults to 2T. I have not yet tried to force 1T, chaces are it won't work I'm guessing.

 

[DrMrLordX]

For those of you with AM2 rigs, you will find that 1T doesn't do much at all. I tried running 1T vs 2T on my AM2 rig and all it did was add some inconsequential memory bandwidth and reduce latency by 4 cycles. It had a much greater impact on s939 and s754.

 

[nerp]

I went from 2x512 to 4x512 of my Crucial Ballistix on my 939 board. It forced me to go from 1T to 2T and I can't tell _any_ difference in anything. The machine benefited from the additional memory so much so that Vista is remarkably faster than with 2x512 in 1T.

Games are faster too. Any slight drop in memory bandwidth is more than nullified by the advantages of having more memory.