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Can't overclock with OCZ 2GB plat ed.


i-MaN

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I've been trying for the past 2 days to overclock my system with the new ram I got. Originally I was using a cheap 512mb (single) stick of Samsung memory. I was able to overclock to 2.71Ghz and ran stable in prime95 and memtest for several hours. And I had no problems when playing games. With the new memory (OCZ 2GB plat ed. OCZ4002048ELDCPE-K) I was not able to go past 215 with 1:1 ratio. Would not boot into windows with anything past that, no matter what I loosened the timings to nor raising the voltage. I tried overclocking to 300FSB (I was able to reach this before with no problems) using mem divider of 0.75 with loosed timings of 2.5-3-3-7 but it would crash when playing games. And is not stable in prime95 for more than 2hrs. If I use any other ratio of the mem divider it won't boot into windows, it won't even go into memtest when I have that enabled in bios. No other mem divider/timing/voltage combination works other than this 0.75 at 2.5-3-3-7. But even this is not stable. It is only stable if I use an FSB of 215(or lower) and keep the ram timings at it's stated 2-3-2-5. Can someone please give me any tips or pointers as to what else I can try to overclock to my old 2.7Ghz and run stable?

 

Currently the ram is in the two yellow slots, tried the two orange slots, but there is no difference.

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yeah i got that stuff, and ive gotten them to 230, but they pretty much dont go 1mhz over that, its pretty much at a wall and i cant do . to tell it otherwise haha, i run them stock voltage with 2.5,3,2,5 timings

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Thanks for the input guys, higher voltage didn't seem to work for me, I'll try the bios upgrade. Calvintang I tried using dividers, and i currently am using a divider of 0.75 but it isn't stable and using any other dividers doesn't work.

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It's not the best ram for overclocking unfortunately.

 

Check out the bleedinedge forums, that mjight help a bit.

 

Also play around with drive strength maybe, and 2.7V worked pretty well for me... could try that too.

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Did you check outthe overclocking guide?http://www.dfi-street.com/forum/showthread.php?t=28049 I like to test the memory out seperate from the CPU first with a low CPU didvider. see how far that will go then work on the CPU. What volts on the CPU sometimes you need a little extra for the memory controller.

 

 

 

Dont forget to try T2 and a .5 divider just in case that is start of things to try out.

 

 

Yup check out the BT bios in the bios factory section and some of the others. You can also look in the overclocking database to fing some good settings for the ram. One the ram is sorted then you can start wok on getting the highest speed from the CPU.

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Thanks a lot again for the replies, I really appreciate it.

I am currently using 1.55V for the cpu and the Ram is at 2.8V. I have tried using a lower multiplier for the cpu to see how far I can push the ram. I can reach 229Mhz max, with loosened timings of 2.5-3-3-7. Loosening more all the way to 3-4-4-8 makes no difference. Increasing voltage again makes no difference, I am at a wall at 229Mhz. So I made my way up with the cpu, and I found it to be stable now at 270Mhz FSB using 0.65 divider (0.5 also works, in fact all dividers work up until 270FSB), but anything higher than 270 I am forced to use 0.75, any other dividers don't work. I have tried 2T, but there is no difference using 2T. I have also tried lowering the HTT multiplier. I was originally using 3, then to 2.5 then 2. Still no difference in stability. I did look through the overclocking guides and other posts in dfi-street and other forums for several hours but couldn't find anything to help. I'll look through the database again, and if I still can't find anything, then I'll upgrade the bios very soon. (need to install a disk drive)

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  • 3 weeks later...

I updated the bios to the one in my sig, and now I can overclock to 2.6 (290 x 9) using the 150 divider and is stable in p95 for 8+hrs (for each test, small, large and blend), on both cores, and memtest is fine for 6+hrs. I can go up to 292, however, I can't go any higher. With one stick of Samsung ram (512mb) I can reach 2.71. However, with both sticks of my OCZ Plat Ed. ram in dual channel mode, 2.6 is the max I can reach. Currently my vcore is set to 1.425 and mem is set to 2.8. Raising the vcore to 1.55 doesn't let me reach 2.7. And trying different volt settings for the memory doesn't help. I tried from 2.5 - 3.0, but still not stable for anything past my current settings.

 

Any suggestions in reaching a higher clock?

Oh and my ram timings are 2.5-3-3-7 operating @ 217.5 Mhz (150mem divider)

When I tested ram by itself it can reach higher, but when overclocking with the cpu this is the highest I can reach, well 2mhz higher but to ensure stability I usually operate 1-2mhz lower than highest possible settings.

 

Oh and I have tried to use other mem dividers, but the only ones that work are the 133, and 150. However, with the 133 divider, it tops out at 2.4ghz, if I go any higher it won't post into windows. Using 0.75 (150) is the only way I can reach 2.6. I've also tried fooling around with the HTT multiplier as well, currently it's at 3.

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I have the same same CPU and RAM(specs in sig). I was as surprised as anyone to get 235MHz out of these sticks. But my 165 is very picky about which dividers it likes, infact none of them worked except the 3/4 divider. I had originally planned to use the 2/3 divider for 200MHz and 2-3-2-5 timings but it wouldn't even boot. In contrast, my 170 works with any divider.

 

It sounds to me like you might have a weak memory controller on that CPU. That's why it will OC further with 512MB of RAM than with 2GB. You can try upping the HTT and chipset voltages and playing with the lower portion of the RAM timings(drive strengths, read preamble, max async latency, etc) but it may or may not help.

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