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RAM Voltages

P

pyroguns56

Junior Member
The board I'm going to buy tells me only to install 1.8v memory on it, but the memory I really want to buy runs at 2.0v. Would it be possible to run this memory on the board? Would there be any side affects at all?

Here is the board

Here is the memory.

Thanks.
 
Yes & yes.

First off, welcome to the forums 🙂

Secondly, that motherboard actually supports 1.8 through 2.1V, so you'll be fine for the majority of RAM out there.

Thirdly, while you could likely run RAM rated for 2.0V on a motherboard that has only 1.8V, it would likely need to be set to a lower speed &/or looser timings to achieve that.

On many of the motherboards that don't have higher than 1.8V, RAM options are often all automatically set; the choice of modiying settings might not be available.
However, the good news is that most RAM has pre-programmed SPD settings that allow it to run at 1.8V & looser timings & often successfully run on a motherboard with low voltage only.

My fourth concern would be why you are buying the P5B?
It was a good value board for its time, no doubt, but its time was over a year ago.

I'd recommend a newer chipset with better features & overclockability, not to mention better current/future processor support.
P35 namely, as that's what replaced P965.

Here's a few suggestions; definitely better that the P5B for today's systems.

Gigabyte DS3L - $90
http://www.newegg.com/Product/...2E16813128059&Tpk=ds3l

Abit IP-35-E - $90
http://www.newegg.com/Product/...16813127031&Tpk=ip35-e

And there's more.

Good luck!
 
i would love to get a more modern board, my problem is budget though. those boards are cheaper, but they don't run the 800mhz bus, which is what my processor is, i just dont have the money to throw into a 1066 mhz+ cpu.

as to the memory issue, it says on the specs:

Notice: Only DDR2-800 memory supporting JEDEC approved 1.8V operation with timings of 5-5-5 or 6-6-6 is supported on Intel Desktop Boards based on Intel 965 Express Chipsets.
Click to expand...

 
What CPU do you have?
Here's the GS3L's supported CPUs list: http://www.gigabyte.com.tw/Sup...el.aspx?ProductID=2629

And as for money, you can buy a Celeron dual core E1200 for $55, & with a bit of OCing, that will beat any Pentium 4 you have presently 😉

Yes, JEDEC approved RAM only goes up to 1.8V.

As i mentioned though, that mobo does do 2.1V.
Now if you want to be safe for all motherboards out there, try to find some RAM that's rated 1.8V.

Not saying get this kit specifically, but it's an example: http://www.newegg.com/Product/...x?Item=N82E16820146569

There are lots of kits out there rated 1.8V if you're worried about voltage.
 
The CPU I'm getting is the Allendale e4500, which can be oc'd to 3ghz+ with good cooling. Only disadvantage is that it runs at 800mhz.
 
Okay, then why the need for a P965 mobo? 😕

E4500s work on all the P35/X38/X48 mobos 🙂

That "disadvantaged" 200 MHz FSB (err...800 Mhz quad pumped if we're speaking in marketing terms) can be bumped up to a lot faster via OCing as you mentioned 🙂
 
o rly?
I'm not too familiar with overclocking. You're saying that I can oc my allendale to 1066mhz and above? How would I do that?
I'm assuming it would still go past 3ghz.
 
Ya rly.

E4500 is 11x200 = 2200 MHz.

11x266.66 = 2933 MHz

That's a 266 MHz FSB quad pumped. (4x266.66 = 1066 MHz)

Heck if a high FSB is all you want, you could run 7x425 = 2975 MHz (4x425 = 1700 MHz quad pumped FSB)

Not that a high FSB really matters...higher clockspeed is the main thing you want when OCing.
 
I'm pretty confused at this point, can I overclock the FSB and clockspeed at the same time? Are they separate settings? Do they need to coincide with each other somehow?
 
That's how you overclock.

Unless you buy an extreme edition or black edition CPU, multiplier are locked upwards, meaning the only way to increase a CPU's speed is by increasing the FSB.

So when you buy that E4500, it will be running @ 11x200 by default.

It's simple math.

11 = multiplier
200 = FSB

11x200 = 2200 MHz.

Make sense?

To overclock, you increase the FSB.

So let's say you went into the bios & increased the speed of the FSB from 200 to 250.
That's 11x250 = 2750 MHz.

And so on.

RAM speed also coincides with this, via ratios, or fractions.

Common one would be 1:1, which means the RAM operates at the same frequency as the FSB.

But there are other options, such as 4:5, 2:3, 1:2, etc.


At stock speeds, your CPU is 200 MHz FSB.

If you set the RAM ratio to 1:2 (iow, RAM is twice as fast as the FSB), you'd have RAM running @ 400 MHz, which is DDR2-800 (400 MHz x 2 - double data rate).
 
So the multiplier is 11, which means that if I change the FSB speed to 273 and achieve a clockspeed of appx. 3.0ghz, I will be able to use the 4500 on a 1066 and above mobo?
 
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