• Welcome to Overclockers Forums! Join us to reply in threads, receive reduced ads, and to customize your site experience!

AI7 which pqi TURBO Series Memory

Overclockers is supported by our readers. When you click a link to make a purchase, we may earn a commission. Learn More.

rbdaniel@bellso

Member
Joined
Nov 2, 2003
Location
Miami
Hello everyone

I have been reading much about this PQI memory and wanted to know if i can use the pqi TURBO Series DDR PC-4000 with my AI7.

I guess the better question is what is the maximum "PC" factor that I could use with the AI7?

I am running the Mushkin Level II 2-2-2 PC-3200 and with a P4 2.4C@ 3.6. I am interested in trying a diferent memory bandwith/

Thank you

Daniel
 
Not really sure if you can expect it to work as well as your current ram.

Since you need extreme fsb to make your cpu rate, 1:1 operation is not likely with any of the currently available memory types. I don't know if the newer chips like TCCD will work in async modes at high fsb on an AI7.

In general though, what is wrong with your system is that the cpu multiplier is too low rather than your BH5 not being the proper ram type. While it would be interesting to see if TCCD band-aids this situations any better than does BH5, it can't make the system design ideal.
 
larva said:
Since you need extreme fsb to make your cpu rate, 1:1 operation is not likely with any of the currently available memory types. I don't know if the newer chips like TCCD will work in async modes at high fsb on an AI7.

I've run PQI TCCD on the IS7-E, which performs identical to the AI7 except you are 'limited' to 2.8 VDIMM. My best pair of 2x512 PQI did 264, 1:1, 2.5-3-3-6 @ 2.6 volts, and may do higher as I quit testing. 300, 1:1, 2.5-3-3-6 with more volts? I think it will fall short. This ain't no A64 deal with one stick.

As far as 5:4 is concerned, the ram performs very well due to the relaxed settings. But not quite 300, 5:4. I got them to 297, 5:4, 2.5-3-3-6 on an Epox 4PDA2+, Rev. 2.0. But these weren't that best pair I mentioned above, so it may be possible. Even at the slower timings, they will beat your Mushkin at 3:2, 2-2-2-5.

Ballistix PC3200 are your best bet for fast timings at 5:4. I've run even the PC4000 Ballistix at 294, 5:4, 2.5-2-2-5, at 2.8 volts or less. I was CPU-limited at the time, so who knows, maybe 300, 5:4, 2.5-2-2-5 is possible. That will obliterate your Mushkin at 3:2.
 
Clevor said:
As far as 5:4 is concerned, the ram performs very well due to the relaxed settings. But not quite 300, 5:4. I got them to 297, 5:4, 2.5-3-3-6 on an Epox 4PDA2+, Rev. 2.0. But these weren't that best pair I mentioned above, so it may be possible. Even at the slower timings, they will beat your Mushkin at 3:2, 2-2-2-5.

Except that you know the Mushkin will do it. The Epox is not an AI7. If the ram is as happy as that in 5:4 on the AI7 too then great--but if it isn't then it is (at best) a giant step sideways.

Also, what does the TCCD stuff think of GAT on an Abit in async modes? If the Mushkin allows its use the difference in application performance won't be nearly as pronounced as the difference in clock rate.
 
Clevor said:
I've run PQI TCCD on the IS7-E, which performs identical to the AI7 except you are 'limited' to 2.8 VDIMM. My best pair of 2x512 PQI did 264, 1:1, 2.5-3-3-6 @ 2.6 volts, and may do higher as I quit testing. 300, 1:1, 2.5-3-3-6 with more volts? I think it will fall short. This ain't no A64 deal with one stick.

As far as 5:4 is concerned, the ram performs very well due to the relaxed settings. But not quite 300, 5:4. I got them to 297, 5:4, 2.5-3-3-6 on an Epox 4PDA2+, Rev. 2.0. But these weren't that best pair I mentioned above, so it may be possible. Even at the slower timings, they will beat your Mushkin at 3:2, 2-2-2-5.

Ballistix PC3200 are your best bet for fast timings at 5:4. I've run even the PC4000 Ballistix at 294, 5:4, 2.5-2-2-5, at 2.8 volts or less. I was CPU-limited at the time, so who knows, maybe 300, 5:4, 2.5-2-2-5 is possible. That will obliterate your Mushkin at 3:2.

why is the ai7 limited to 2.8 volts?
 
thelostrican said:
why is the ai7 limited to 2.8 volts?

I said: "I've run PQI TCCD on the IS7-E, which performs identical to the AI7 except you are 'limited' to 2.8 VDIMM."

I meant the IS7-E.
 
larva said:
Also, what does the TCCD stuff think of GAT on an Abit in async modes? If the Mushkin allows its use the difference in application performance won't be nearly as pronounced as the difference in clock rate.

Very astute of you Larva. You are the first person to specifically ask this, although I have addressed this on that marathon PQI thread (that's the problem with those long threads).

Yes, on an 865P board, enabling full (1:1) and partial (5:4) PAT on the 800 strap can be done by running Sr-Enh-A-D-D. The unbuffered bandwidth you get here is unsurpassed, not even by an 875P board. I have found you can only run these GAT settings at CAS2, e.g., 2-2-2-5, 2-3-2-5, 2-3-3-6.

As the Ballistix can only do 2.5-2-2-5 above 225 and the TCCD 2-3-3-6 (my sticks anyway), would the TCCD with PAT beat the Ballistix with no PAT? Nope, the -3-3- with PAT cannot make up for the -2-2- of the Ballistix. Maybe it might give -2-3- a run for it's money. Besides, the Ballistix can put up a good fight by running A-Str-A-A-A.

I also did another test, TCCD at 1:1, 2.5-3-3-6, A-A-A-D-D versus BH-5 at 2-2-2-5 with PAT, but 5:4 (due to the usual: not enough VDIMM). I found at around 270 fsb, the TCCD at 1:1, 2.5-3-3-6 no PAT and BH-5 at 5:4, 2-2-2-5 with PAT are neck-and-neck (3DMark scores).

So my conclusion to those who are running that fsb or lower: no advantage to upgrade to TCCD from the BH-5.

Keep in mind that my TCCD (PQI PC3200 rated 2-2-2-5) will run 2-3-3-6 fine above 218 or so, up to 243 fsb. Many can only manage 2.5-3-3-6. Oops, there goes PAT. It's no contest then.
 
Last edited:
Hello everyone

Thank you for the replies.. I am currently running A,A,A,D,D. Have tried
T,A,A,D,D but only up to 285 fsb, the systems does not run stable and with memory errors. Timmings now are 2.5-3-3-7. It will run 2-2-2-5, but up to 240 fsb. I have to set the volts to 3.0. Have tried from 2.8 to 3.2 volts no difference. Currently running 5:4. 295 FSB, ram:3.2volts, CPU: 1.625volts
Which I am trying to lower..

Thanks

Daniel
 
Back