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ddr2 and ddr3 in same machine? - Page 6

post #51 of 62
well, it all comes down to the TDP. If you intend to unlock an Athlon II, the TDP of an Ath. II x4 is max 95W; still risky with a 2+1 power phase, but not as much. 4 cores of Phenom II will consume 125W due to most steppings being the same as the 955, etc. rather than 945 and below.

125W processors are already seen pushing 4+1 power phases too far and as such, the power phases fail by either catching fire or exploding.

As you know, more power phases provides more stable power, and the power phases also get very hot; with each phase (of the 4, the extra 1 is split for the CPU-NB which consumes less power) you get a certain amount of power going through.

With 8+2, you have 8 CPU power phases with 12.5% of the CPU power going through. Cool and stable. 4+1, 25%; starting to get there. But, with 2+1%, you now have 50% power going through the phases. At this point they get very, very hot and unreliable. Unless the mosfets are so good they can indeed supply that much power (and they're probably not because ASRock is a low end brand), chances are your board will blow up/catch fire the moment you run a stress test with anything that consumes 125W in there.

Often also, the mosfets don't get any cooling at all; they are often not heatsinked. And, often, people overclocking CPU's use tower coolers that don't blow any air onto the mosfets (unlike stock coolers, which blow down so that the air finished cooling the CPU now cools everything around, i.e. mosfets, northbridge). As a result, the mosfets get even hotter. This is where mosfets begin to fail and catch fire because they run so damn hot, often because each mosfet has to push so much power through it. Remember, with a 2+1 each mosfet has to push 50% or 62.5W through it which is just way too much especially with no cooling.

^ THAT is why I'm telling you to watch out. It's already bad enough with 4+1 power phases and 125W processors, often catching fire after a certain period of time due to lack of cooling, etc. You really can't use DDR2 and DDR3 at the same time on one of these boards anyway, they're meant for people who have DDR2 but want to upgrade to DDR3 later. Spend your money on a better DDR3 board & memory now or just get a DDR2 motherboard. There aren't many good choices for DDR2/DDR3 motherboards.

And eh, the custom title was fairly recent, I made it to 250 rep after just over 1 year about a month ago soo....
post #52 of 62
Makes sense, but you can't unlock Athlon IIs as they're based on a dual core die anyway.

As for the MOSFET cooling, I guess that's when a cooler such as the NH-C12P has its advantages.

And the OP isn't planning on using both DDR2 and DDR3 at the same time I don't think.

Pretty sure he wants to keep his current DDR2 on a new rig, and maybe upgrade to DDR3 later on.
post #53 of 62
but ddr3 isnt expensive why would you stay with a ddr2 system
    
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post #54 of 62
Quote:
Originally Posted by ellisbodds View Post
Makes sense, but you can't unlock Athlon IIs as they're based on a dual core die anyway.

As for the MOSFET cooling, I guess that's when a cooler such as the NH-C12P has its advantages.

And the OP isn't planning on using both DDR2 and DDR3 at the same time I don't think.

Pretty sure he wants to keep his current DDR2 on a new rig, and maybe upgrade to DDR3 later on.
Are you just talking about athlon II x2s? My athlon II x3 unlocks, however it is not stable unfortunately.
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post #55 of 62
There is no board on the market that will run DDR2 and DDR3 at the same time.

There are boards that allow you to use either DDR2 or DDR3 sticks, only one at a time.
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post #56 of 62
Thread Starter 
Quote:
Originally Posted by xd_1771 View Post
well, it all comes down to the TDP. If you intend to unlock an Athlon II, the TDP of an Ath. II x4 is max 95W; still risky with a 2+1 power phase, but not as much. 4 cores of Phenom II will consume 125W due to most steppings being the same as the 955, etc. rather than 945 and below.

125W processors are already seen pushing 4+1 power phases too far and as such, the power phases fail by either catching fire or exploding.

As you know, more power phases provides more stable power, and the power phases also get very hot; with each phase (of the 4, the extra 1 is split for the CPU-NB which consumes less power) you get a certain amount of power going through.

With 8+2, you have 8 CPU power phases with 12.5% of the CPU power going through. Cool and stable. 4+1, 25%; starting to get there. But, with 2+1%, you now have 50% power going through the phases. At this point they get very, very hot and unreliable. Unless the mosfets are so good they can indeed supply that much power (and they're probably not because ASRock is a low end brand), chances are your board will blow up/catch fire the moment you run a stress test with anything that consumes 125W in there.

Often also, the mosfets don't get any cooling at all; they are often not heatsinked. And, often, people overclocking CPU's use tower coolers that don't blow any air onto the mosfets (unlike stock coolers, which blow down so that the air finished cooling the CPU now cools everything around, i.e. mosfets, northbridge). As a result, the mosfets get even hotter. This is where mosfets begin to fail and catch fire because they run so damn hot, often because each mosfet has to push so much power through it. Remember, with a 2+1 each mosfet has to push 50% or 62.5W through it which is just way too much especially with no cooling.

^ THAT is why I'm telling you to watch out. It's already bad enough with 4+1 power phases and 125W processors, often catching fire after a certain period of time due to lack of cooling, etc. You really can't use DDR2 and DDR3 at the same time on one of these boards anyway, they're meant for people who have DDR2 but want to upgrade to DDR3 later. Spend your money on a better DDR3 board & memory now or just get a DDR2 motherboard. There aren't many good choices for DDR2/DDR3 motherboards.

And eh, the custom title was fairly recent, I made it to 250 rep after just over 1 year about a month ago soo....
I didn't think of that it would be unlocking a phenom 2 x2 555 to a phenom 2 x4 b55. So I think that may be a little to extreme for the mosfets and since my expensive 775 board that had most cooling and it still killed its self that way :0
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post #57 of 62
Quote:
Originally Posted by jm3 View Post
but ddr3 isnt expensive why would you stay with a ddr2 system
This has quite a lot of truth to it.
Quote:
Originally Posted by Weasel555 View Post
Are you just talking about athlon II x2s? My athlon II x3 unlocks, however it is not stable unfortunately.
Yeah, I was referring to X2s.
Quote:
Originally Posted by Volvo View Post
There is no board on the market that will run DDR2 and DDR3 at the same time.

There are boards that allow you to use either DDR2 or DDR3 sticks, only one at a time.
If you read back through the posts, this has been said about 10 times by various people

I don't know how much you're wanting to spend, but you could grab a X2 555, this motherboard and this RAM and you would have a nice performance boost there, provided you can unlock the cores. The X2 would probably be better for most games than the Q6600, not better for multi-threaded games and stuff like encoding though. If you manage to unlock it to a quad, it should be better at everything

It wouldn't cost you too much to upgrade once you sold your old stuff anyway. You could probably get £70+ for the CPU (they actually sell for £80 quite regularly), £40-50 for the motherboard and £40-50 for the RAM. That's going off AVForums' Classifieds section prices though, not prices on here.

So potentially, you could get the upgrade for as little as £35
Edited by Ellis - 12/22/10 at 9:29am
post #58 of 62
Thread Starter 
Quote:
Originally Posted by ellisbodds View Post
This has quite a lot of truth to it.

Yeah, I was referring to X2s.

If you read back through the posts, this has been said about 10 times by various people

I don't know how much you're wanting to spend, but you could grab a X2 555, this motherboard and this RAM and you would have a nice performance boost there, provided you can unlock the cores. The X2 would probably be better for most games than the Q6600, not better for multi-threaded games and stuff like encoding though. If you manage to unlock it to a quad, it should be better at everything

It wouldn't cost you too much to upgrade once you sold your old stuff anyway. You could probably get £70+ for the CPU (they actually sell for £80 quite regularly), £40-50 for the motherboard and £40-50 for the RAM. That's going off AVForums' Classifieds section prices though, not prices on here.

So potentially, you could get the upgrade for as little as £35
Yeah but i cant sell here because of my rep
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post #59 of 62
don't think you can run them together.
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post #60 of 62
Quote:
Originally Posted by jy360 View Post
Yeah but i cant sell here because of my rep
Yeah, that's why I was using AVForums.com prices

Don't need rep to sell stuff there, you just have to be over 18 and create an account

I think it's likely that you'll be able to upgrade to those things for £50 or less after you sell your stuff.
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