For Hynix coding, D43 means DDR400 with 3-3-3 timing. D4 means DDR400 with 3-4-4 timing. While D5 (donno about D50) is DDR500 with 3-4-4 timing.

You may get the ram part file here : http://www.hynix.com/eng/02_products/01_dram/down/DDR.pdf

My experience on my Apacer BT-D43 made 0352. Quite old one.

Anyway, didn't do much oc until now after reading that 939 can go so high and I don't have any TCCD. So need to "train" up my ram to go >250mhz(ddr500).

In this training excercise, this is what I notice.

1. 1st start with DC. Only good until 230-235mhz with Memtest. Even I set to 3.3v.

2. So test 1 by 1. Found #1 can do 250mhz. The other until 235mhz. So just run that #2 one with 3.3v for like 10 days.

3. Now both can go >250mhz SC.

4. Next DC them. Same thing only until 235mhz, even though chipset voltage until 1.9v. Suspect maybe the chipset. So now time to train my chipset. Set DC at 235mhz and 1.9v and runs. After 1 day, will reboot and see how. Slowly and slowly. Day by day. Advance 1 mhz or 2 mhz. after like 2 weeks, now I am testing at DC 260mhz. Only Memtest #7 fail. Each pass give me about 50 error. Memtest #5 ok.

5. But at DC 265mhz, Memtest will freeze pc. So thinking of alternative.

6. Now using Simmtester, another free memory testing software. Maybe less stress on cpu or whatever. Can run DC at 265mhz and no error.

7. I notice I can boot by #1 ram at 270mhz, but will freeze at bios mem testing. So donno if 270mhz booting is cpu limit, mobo limit or ram limit.

My conlucison. When new, cannot oc. Need time and patience to train up the electronic component, without over done them. Otherwise, will be permanently cacat.

My advice. If you ram cannot go high, then set at highest possible stable, like 215mhz and max voltage 2.9v (nf7). Then just do your normal thing with your pc for about 1 week. After that, then try oc and see if can go higher.

When I got got my ram, I can only go until 225mhz. Now after more than 1 year of normal use, start to play and found can go so high.

Yap. Threat them like puppy. And train them like a puppy. Very soon, they will call me uncle ep (as in Scrappy Doo and Scooby Doo). I can ask them go 220. They go 220. Go 250 they go 250. No bad heh. Only too bad cannot train them to shake hand with me.

I know it is burn in method. Initially, my understanding is hynix at >3.0v can get error. I was just play play, with 2.8v and got error at low fsb. Then I just tried to increased by 0.1v just to see how and found ok. So just slowly go and go and now at max 3.3v. And I am now testing at 275mhz. Not with memtester, but simmtester software which is less tough. The idea is just burn in both ram and mobo.

Now little bit worry. After burning at so high. Later on, the whole thing just damaged. Oh well. Then got excuse to go to 939.

Ok, training finished. Time for the test. Let's see how good are my pets.

Last time, can only do 2-2-2-x until somewhere near 180mhz/360ddr. But that was with Abit Nf7-M mobo. And 2-3-3-x until only 210mhz/420ddr. With max 2.9v.

Now, last mid night just gatai gatai to run run and see how. This time used DFI Infinity Ultra NF2 mobo. Was able to do 2-2-2-11 at 3.0v with 225fsb/450ddr. CPC off. Prime for 6h33m no error.

The rams were Apacer BT-D43 2x512m in dual channel.

The burn-in-ing appears to really can train the rams.

Next few weeks will be fun. Let's see how high I can go with 3.0v and 2-2-2-x. And also see how high will 3.3v 2-2-2-x And also 3.3v max fsb. So far I know my DFI mobo can only go until 275mhz. At 276mhz, it will freeze at initial bios memory testing section.


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512mb Hynix. That is good news. That mean very soon we will have 1G ram with 512mb Hynix chip. Hopefully this guy can all go to >250mhz.

Even though at loose 3-4-4-x also never mind. But definitely a much much cheaper solution to go high (speed) and big (memory).

If you have memtest86 software, you can try and look at the memory transfer rate between 2-x-y-z and 2.5-x-y-z. If I remember correct, they are same, for some reason that I have no idea of.

Other software, you can try sisoft sandra and lavalys and look at the memory transfer rate.

Your NF-7 is which version ? The Nforce II mobo chipset got 2 version. The 400 and non-400 version (earlier one). The 1st batch of NF2 chipset was only rated 333.