Calling all 200MHz-ers out there!

256mb Corsair xms PC3000 rated 2-3-3-6-1. I'm running on an abit BD7, 150fsb 3:4 cpu:mem, (so 200FSB memory,) cas 2.5-3-3-7-1, default voltage. The bandwidth is 3009/3035. I could push it with more voltage, but why? It gives me what I need.

Clevor said:

"the reason? my crappy radeon8500 dies at with more than 104fsb. that's right.. a lame 70mhz AGP. it can't handle an extra 4mhz of heat."

That's strange, I've run my Radeon 8500 at up to 150 FSB, and that's on a 440BX chipset! It only has a 2/3rd AGP divider so I was running 100 mhz on the AGP bus no problem. It's one of the reasons I still keep the card since the Ti500 I had would not handle over 73 mhz or so.

I've tested a bunch of sticks that do DDR400:

2-256 MB DTL sticks (0224), 200, 2.7 volts

1-512 MB DTL (0221), 206, 2.8 volts

1-512 MB Corsair XMS3200, Ver. 1.1 (Samsung CTL), 213, 2.8 volts (haven't tried higher)

2-256 MB CTL sticks (0208), 206, 2.8 volts. One stick will do 213. Haven't tried higher with one stick.

All the results above are on a P4B266-E, which locks out at 2.5-3-3-7 over DDR340 or so, so I couldn't test faster settings. But because it is an Intel 845D board, Sandra scores easily surpassed 3k.

When I had a P4S533 board, the 2-256 MB CTL sticks dated 0208 (same as in the VR-Zone article!) actually did 200, 2-2-2-5-1 using a mem ratio like 3:5 or something (2 sticks!). And I mean stable in 3D. But if I tried to do near 200 mhz at 4:5, had to drop down to 2.5-2-2-6-2. But I think it was because my CPU was near it's limit at around 158-160 FSB, plus the board is infamous for instability over 155 FSB due to the lack of an AGP/PCI lock or 1/5th divider.

BTW, I tried a recent batch of 2-256 CTL sticks (0225) and they would not do 200 mhz at all on the P4B266-E. Best they could do was around 193 at relaxed settings on an MSI board. So the 0224 DTL sticks actually performed better.

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That's really odd. My Samsung Original 512Mb stick purchased last week from www.overclockers.co.uk can barely do DDR375. Any higher and it goes unstable. The stick is a 0224 DTL and I'm using it on an Abit BG7. Vdimm 2.8v never helps either.

By the way, be warned. OcUK send out dimms that they test first. I don't know what to make of this... maybe they sent me a lesser quality dimm?

"That's really odd. My Samsung Original 512Mb stick purchased last week from www.overclockers.co.uk can barely do DDR375. Any higher and it goes unstable. The stick is a 0224 DTL and I'm using it on an Abit BG7. Vdimm 2.8v never helps either."

Did you try burning in? Except sounds like OC.uk pretests so it is already done.

All the testing I've done with various DDR suggests things are a crapshoot. A lot depends on the motherboard. Supposedly the latest DTL sticks are supposed to do real well, but what does 'latest' mean? 0225, 0226, 0228?

I have four rigs and got bored so set up my CUV266 board and little 600E that does 156 FSB for 936 mhz. Previously I used my best CTL sticks dated 0208. This time I used the 512 MB 0221 DTL stick. Wouldn't do 156. Not 155 either. Had to drop down to 152. Heck, I can do 150 with 512 MB of SDRAM. The advantage of the CUV266 is it's a Coppermine board that uses DDR. On this board, I can only run 1:1.

What's happening here is my CPU is probably at it's limit and is affecting the ram, as all my sticks do at least 170, 2-2-2-5-1.

Had a hunch so changed to my XMS3200. Did 155 but not 156. Finally tried the junk 0225 CTL sticks and it also did 155 but not 156. With the DTL stick, sometimes the computer would spontaneously reboot. This rig seems real happy with the junk CTL sticks, so I decided not to sell them over the weekend and keep them for my Athlon rigs. I'm happy at 170, 2-2-2-5-1 on an Athlon board. If I need to do 190 or something I'll drop down to 2.5 or 2-3-3. Remember, these sticks are overachieving. In Sandra they are identified as CAS 2.5 at 167 mhz and CAS 2 at 133.

So I figured, maybe the 0221 DTL stick is expendable? Yet that was the only one to do DDR400 on a finicky MSI 645DX board! Even the cherry 0208s CTLs wouldn't do it. So go figure.

Unfortunately, for most people, it's not cost effective to own several different sets of DDR and to custom tailor to your rig. I'm in Japan so I can sell used XMS3200 for equal or more than I paid for it in the U.S. Right now I'm holding on to all the sticks until the dust settles.

BTW, my 0208 DTLs and XMS3200 may very well be capable of DDR453. I tested 170, 3:4 (DDR453) on my P4266-E board, since I finally got a 1.6a that will do it, and both posted cleanly but had a registry restart blue screen. However when I dropped down to 166 found out Win98SE had not corrupted and was OK. This is on the virge.

After I took the board out I realized I didn't have the VMEM overvolt jumper on so I was running at 2.5 volts! Maybe the ram will do it at higher voltage (duh, I would think dat would help ).

Maxvla said:

221 on slower settings 195 on fast settings actually.

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221 cas 2.5 normal, 205 cas 2 normal, 195 cas 2 all turbo to be exact.

Samsung PC2700 512MB x2

running on an Abit IT7
ram is at DDR-420 currently

fsb is 158 /3 * 4 = 210MHz

trying to squeeze a little more out of it but not sure how much higher it will go

voltage is at 2.8

timings are:

2.5,7,3,3

i did run sandra all night last night and now am able to run at 210 - i couldnt last in windows for any longer than about 2mins previously!! I doubted the burn in but am starting to believe.