2.8v sounds like a factory overclock to me.
I don't know if they work at 2.8v by default. Perhaps you could first plug in some generic DDR-400 1GB 3-3-3 modules, set things to manual, shut down and replace with your OZC modules, enter BIOS and do your tweaks manually and try to see if it runs stable?

For some reason I never really liked modules that were sold as "better" or "lower latency" whilst having a factory overclock, as the overclock might as well be done by the end user manually. Only advantage I could think of is warranty, but I'd think in your case this wouldn't apply?

I do like the RAm heatsinks of many of those OCZ modules though, but I did notice some tended to let go and not be attached to the RAM chips anymore (they would be slightly bend, so better have a visual inspection before you intend to run your memory modules at the top range somewhere).

Default settings are almost always JEDEC standard settings, and those are 2,6V max. for 400MHz JEDEC profile kit (and 2,5V for every other profile).
2,8V is what OCZ wants you to set to get 100% stable at timings and frequency described on package/stickers. RAM obviously can work on multiple different profiles set in SPD.
Check CPU-z "SPD" tab for more details about settings available to your RAM modules.

@up "RAM for overclockers" is a guarantee OC up to set point, specified by manufacturer (warranty covers any stability problems if said RAM can't work on it).
Normally you don't get that and have to resort to serial or revision checking to get best quality RAM.
Of course you can "cherry pick" Overclocker's RAM as well 😉

PS. I personally don't like those high profile RAM kits (OCZ heatpipe DDR2 is overkill).
They are bulky, and in most MB's can't be put besides each other without bending memory slots (require mix-matching for 4 module configuration).
There's also that CPU heatsink height/width problem (too small, and RAM/cooler can't be mounted).
I prefer to search for best IC's "under the hood" and pick ones with standard size heatspreader.

Tetrium wrote:

2.8v sounds like a factory overclock to me. I don't know if they work at 2.8v by default. Perhaps you could first plug in some g […]
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2.8v sounds like a factory overclock to me.
I don't know if they work at 2.8v by default. Perhaps you could first plug in some generic DDR-400 1GB 3-3-3 modules, set things to manual, shut down and replace with your OZC modules, enter BIOS and do your tweaks manually and try to see if it runs stable?

For some reason I never really liked modules that were sold as "better" or "lower latency" whilst having a factory overclock, as the overclock might as well be done by the end user manually. Only advantage I could think of is warranty, but I'd think in your case this wouldn't apply?

I do like the RAm heatsinks of many of those OCZ modules though, but I did notice some tended to let go and not be attached to the RAM chips anymore (they would be slightly bend, so better have a visual inspection before you intend to run your memory modules at the top range somewhere).

I also was thinking at some kind of factory oc, 2,8v seems too much I don't even know if my bios support this voltage, need to check. Maybe it was better to wait before buy it cause I imagine that they will ran at 2,5-3-3-5 at 2,6v just like any other usual 1GB kit Hyperz or Corsair that probably were cheaper.
As soon as I'll receive them I'll do some tests. Acutally my Corsair value kit run stable but at 3-3-3-8 and I never liked ram overclock where things can become unstable in any time.

I used to have some OCZ PC4000 that was stable at its full speed even at stock voltage. Just see what happens.

swaaye wrote:

I used to have some OCZ PC4000 that was stable at its full speed even at stock voltage. Just see what happens.

Thanks, I'll update as soon as I'll receive them. 😀

Careful with that stuff... keep it as cool as possible.

I had a lot of OCZ's overclocking ram back in the pre-DDR2 days and it ran extremely hot and I had more than one go bad (only memory I've ever had go bad that wasn't DOA). The resale value on that stuff years ago was insane though. I sold one 2GB kit of DDR500 for more than what it cost for 4GB of DDR2-800 at the time. Another kit I had went bad and when I contacted OCZ they said they no longer were able to replace it, so they gave me like $90, which was, again quite a bit for what was mostly obsolete RAM at the time.

Its funny to think about how overclocking was completely reliant on memory for so long.

Yea these sticks have a default speed and voltage as per SPD. Like 3-3-3-8. To get the higher speed, you need to go into the Bios, increase the voltage and manually tighten the timings.

PhilsComputerLab wrote:

Yea these sticks have a default speed and voltage as per SPD. Like 3-3-3-8. To get the higher speed, you need to go into the Bios, increase the voltage and manually tighten the timings.

I've also seen that some model had their own original fan system to put on top of the kit. But last time I checked also with some Hyperz CL2.5 one they didn't seem to run hot. Maybe with nforce-dualchannel they would be more stressed that with KT600 single one.
But I don't think I'll overclock them more that stock 200Mhz that's why I prefer original highest timings. I've read that many don't reach more than 220/230Mhz and I don't think the difference is enough to risk the ram.