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Ram timings and frequency question

Last response: in Overclocking
September 6, 2008 2:25:33 AM

Hi y'all!

Just wondering if the voltage for DDR2 4-4-4-12 800MHZ would be the same with DDR2 600MHZ 3-3-3-9. I read somewhere that these two settings are theoretically the same performance so I thought the voltage would be the same. Also, which one would be hotter?

Thanks in advance!
September 6, 2008 4:05:08 AM

The voltage is probably going to be the same (1.8volt). They should offer about the same performance. Going below a certain frequency though, can hurt the performance. The 800mhz ram has the advantage to be able to sync with the fsb 1:1 for overclocking. I would think the 800mhz ram would run a little bit hotter. If they are the same voltage, the temps aren't going to be far apart though.
September 6, 2008 4:08:22 AM

all memory sticks have different voltages as spec'ed by the manufacture, look on the website or package and it should tell u, most high performance sticks are 2.0 to 2.3 v
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September 6, 2008 4:44:29 AM

The JEDEC standard for DDR2 is 1.8V. Advertising that you don't meet the spec doesn't make it ok.
Buy most Mushkin (or even A-Data), and it will run at its listed timings at 1.8V. Buy that Crucial, or OCZ, or Corsair that is 4-4-4-12 at 2.1V, and chances are it will be 6-6-6-18 (or worse) at 1.8V. What does that suggest about the OC potential of the Mushkin?
September 6, 2008 4:57:39 AM

Thanks for the quick responses. I already have the ram, I was just wondering about the settings. Currently I'm running 300MHz FSB, and my ram's spec is 4-4-4-12 DDR2 800MHz 2.2V - crappy ram. So if I were to run 600MHz, proportionally, the timings should become 3-3-3-9 to theoretically have the same performance.

The big question here is, what voltage? Common sense tells me it's 2.2V, but I really don't know.

Of course I'm Prime testing it to get it stable, but knowing the answer to this question is helpful.
September 6, 2008 5:09:15 AM

It's probably going to be 2.0-2.1v (I'm just estimating). Set it at 600mhz, then lower the voltage until it's not stable anymore.
September 6, 2008 5:14:08 AM

br3nd064 said:
It's probably going to be 2.0-2.1v (I'm just estimating). Set it at 600mhz, then lower the voltage until it's not stable anymore.

Exactly what I was doing, except computer would freeze at any voltage level. :(  Stupid ram, can't even handle the tighter timings.

Change of plans. I did 333MHz and the ram's default settings of DDR2 800MHz 4-4-4-12 2.2V. This was my original setting and looks like I'll have to live with it until I get some better ram.

Thanks y'all for ya help!
September 6, 2008 10:46:36 AM

its always best to run at 1.8V and try lower your timing until it become unstable.thats how you do it.