DDR2 that runs at 1T?

[VirtualLarry]

link
Click "Specifications".

4-4-4-15 1T

How in the world do they get their memory to run a 1T, when most P35 mobos won't even support a 1T setting.

 

[zerogear]

1T settings are usually ok when you only have 2 memory modules

 

[myocardia]

Micron D9-GMH RAM will run @ 1T, as long as you have an AMD CPU, or an nVidia chipset for your Intel CPU.

 

[Idontcare]

To have your ram operate in 1T mode you need both (1) quality ram that supports 1T command rate, and (2) a chipset/mobo that supports 1T command rate.

All you are linking to is ram the supports a 1T command rate. It is still up to the end-sure to put them into a mobo/chipset that also enables 1T command rates.

This is partly why you see the newegg ad blurb going on and on about Nvidia enhanced profiles as OCZ is pretty much guaranteed that any user dropping these into an Nvidia mobo will have chipset support for a 1T command rate.

My Asus X38-based P5E WS Pro supports 1T command rate even with all four dimm slots populated with my 1GB DDR2-1000 Mushkin redlines (quality ram, way over-priced but I got what I paid for).

The real question to be asked is why bother with 1T command rates? My personal tests have shown zero (<1%) performance impovement in my apps if interest.

 

[nerp]

Yeah, totally not important in terms of speed. The time spent trying to get 1T to work isn't worth it.

Memory speeds mattered much more back in the day but with a DDR2 system, forget it.

 

[betasub]

way over-priced but I got what I paid for

Strange way to put it. If you get what you pay for, can it be overpriced?

 

[Idontcare]

Originally posted by: betasub

way over-priced but I got what I paid for

Strange way to put it. If you get what you pay for, can it be overpriced?

I think you are confused about what the phrase "I got what I paid for" means.

If you pay for a toyota camry and you get a toyota camry then you got what you paid for, regardless whether you paid too much or too little for it.

Had you paid for a toyota camry but you got toyota corolla then you didn't get what you paid for, regardless whether you paid a lot or a little for the camry/corolla.

The poster is saying he got what he paid for, there was no switch-and-bait or false promises of capability, but the price he paid for the goods was more than it was worth (apparently).

Understand?

 

[BonzaiDuck]

Originally posted by: Idontcare

Originally posted by: betasub

way over-priced but I got what I paid for

Strange way to put it. If you get what you pay for, can it be overpriced?

I think you are confused about what the phrase "I got what I paid for" means.

If you pay for a toyota camry and you get a toyota camry then you got what you paid for, regardless whether you paid too much or too little for it.

Had you paid for a toyota camry but you got toyota corolla then you didn't get what you paid for, regardless whether you paid a lot or a little for the camry/corolla.

The poster is saying he got what he paid for, there was no switch-and-bait or false promises of capability, but the price he paid for the goods was more than it was worth (apparently).

Understand?

I don't get it. That kit costs about $45. Granted, DDR2 is as cheap as KOOL cigarettes today, but two years ago you could pay $200 for a 2GB kit. In fact, I think when the first 2 GB kit for DDR was released, the going rate was around $400.

Digression: I'm going through my parts locker. I found a $425 AGP nVidia graphics card that isn't worth squat. I'm saving it for my brother's mother-in-law's machine we gave her four months ago. (She's happier'n-a-pig-in-shit, too).

On topic (you know me . . . . ): If you were building a motor-cycle to race at Bonneville, and you could get more horsepower from several improvements -- let's say carburetor mods and oversize pistons -- wouldn't you do both? You can certainly run Crucials at 1T, and you also have to bump up the voltage. When I told Crucial tech-support that I was doing this, they went "Ballistic" on me. So if OCZ is spec'ing these modules to run at 1T, I am also guessing that there may be a voltage range just within spec that allows you to trim tRAS to 12 -- maybe even 10. Maybe . . . maybe . . . even 9, but you would want tCAS + tRCD +2 to be a lower limit for tRAS. Maybe you could tighten down tRCD.

Suppose you can do that at DDR=800Mhz? The 1T command rate may net you between 200 and 500 Mb/s in additional "read" bandwidth. tRAS doesn't help that much by itself, but if you can twist down the "Advanced" "Bank-Cycle-Time" or tRC from its loose or auto setting to tRC = tRP+tRAS (must be >= to the sum) -- you get an enormous boost in bandwidth without much worry of stability loss (unless you violate the >= rule). Further, the sort of overlapping latency features (I forgot what it's called exactly) of DDR2 seem to give plenty of lebensraum for this sort of tight setting. So if you can drop tRAS, you can drop tRC.

More bandwidth from a 1T command-rate; more bandwidth for tighter latency settings. More bandwidth is better. More bandwidth means more Buck Rogers. More Buck Rogers without more bucks.

 

[Idontcare]

Originally posted by: BonzaiDuck
I don't get it. That kit costs about $45. Granted, DDR2 is as cheap as KOOL cigarettes today, but two years ago you could pay $200 for a 2GB kit. In fact, I think when the first 2 GB kit for DDR was released, the going rate was around $400.

The kit cost me $450 for 2x1GB kit...I bought 2 kits naturally for a total of $900.

I got what I paid for...wonderful timings and super-duper-uber bandwidth. Exactly what Muskin was saying the kit would do.

But $425 for those timings though was way over-priced. I could have gotten those timings out of an overclocked kit costing less than $200 at the time, I was just waaaay to lazy to invest my time in finding cheaply priced Micron D9 fat-body chips.

 

[BonzaiDuck]

Originally posted by: Idontcare

Originally posted by: BonzaiDuck
I don't get it. That kit costs about $45. Granted, DDR2 is as cheap as KOOL cigarettes today, but two years ago you could pay $200 for a 2GB kit. In fact, I think when the first 2 GB kit for DDR was released, the going rate was around $400.

The kit cost me $450 for 2x1GB kit...I bought 2 kits naturally for a total of $900.

I got what I paid for...wonderful timings and super-duper-uber bandwidth. Exactly what Muskin was saying the kit would do.

But $425 for those timings though was way over-priced. I could have gotten those timings out of an overclocked kit costing less than $200 at the time, I was just waaaay to lazy to invest my time in finding cheaply priced Micron D9 fat-body chips.

Can't help but stick my two-cents in here, Bro'! Almost belongs on the political forum, but . . . .

Certain parts of the "spectrum" like to spout their ideology about the perfection of "free markets." Free markets work perfectly, if consumers and seller/producers have perfect information, and there are many buyers and many sellers. (Not like Ray L. Hunt and the oil and refining industry.) But people don't have perfect information, and people make mistakes.

I do it too, Bro'!!

 

[taltamir]

so... in benchmarks... how much does your performance increase going to 1T?

 

[coolpurplefan]

Originally posted by: taltamir
so... in benchmarks... how much does your performance increase going to 1T?

I don't know about DDR2, but in DDR1, it was something like 3%...? lol

 

[BonzaiDuck]

Originally posted by: coolpurplefan

Originally posted by: taltamir
so... in benchmarks... how much does your performance increase going to 1T?

I don't know about DDR2, but in DDR1, it was something like 3%...? lol

I never measured it as a percentage of base -- but in MB/sec.

I think that with 2T, I had a score of maybe 8,900 -- this was at 1:1 with tight timings and at or below DDR= 720. With 1T, I think it went up to somewhere between 9,200 and 9,400.

Eventually, when I started experimenting with dividers <> (1:1) and set it to 4:5, a combination of overclock to 875, timings at 4,4,4,10 and 1T put the bandwidth something close to around 9,800.

Here, I'd been running the Crucials at 2.175V, but the reported value was something between 2.22 and 2.24V. And the Ballistix went "south" on Christmas eve, when I had the machine loaded up with a demonstration game for the fam-dam-ily.

Luckily, I had a set of rebadged Tracer DDR2-800's, a database of overclock settings, and my wits. So when the fam-dam-ily convened for dinner that evening, all was happy-joy and wonderful.

But IdontCare has a point. If the subject OCZ's spec'd to run at 1T and the Intel boards (mentioned as they have been over the last year ) don't allow adjustment of the command-rate, then you wonder if nVidia boards will allow "auto" adjustment between 1T and 2T, whether that happens with the Intel boards.