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Will Bulldozer AM3+ support the same DDR3 memory as AM3? - Page 3

post #21 of 74
Quote:
Originally Posted by DuckieHo View Post

How so? The fastest DDR3 have lower latencies and higher clocks than DDR2.
The key is in the wording. I said we as in me and him.



As for DDR4

I think the aim is more toward more efficient computing. Lowering the power requirements of the parts. it just so happened they got faster too..

I think i read it some where. Was it 1.25V or 1V that DDR4 is expected to run at?
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post #22 of 74
Quote:
Originally Posted by StuffStuff1 View Post
The key is in the wording. I said we as in me and him.



As for DDR4

I think the aim is more toward more efficient computing. Lowering the power requirements of the parts. it just so happened they got faster too..

I think i read it some where. Was it 1.25V or 1V that DDR4 is expected to run at?
This is only for generic parts. Once lower CMOS (nm) process get more common, lower voltages will get more common in performance DDR4 memory parts. But for the first year or so, a lot of performance DDR4 will be needing 1.5V to work - kind of like DDR3 needing 1.8V at first.
post #23 of 74
Quote:
Originally Posted by xd_1771 View Post
This is only for generic parts. Once lower CMOS (nm) process get more common, lower voltages will get more common in performance DDR4 memory parts. But for the first year or so, a lot of performance DDR4 will be needing 1.5V to work - kind of like DDR3 needing 1.8V at first.
Yea but i still find that pretty impressive.

1v...
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post #24 of 74
Quote:
Originally Posted by xd_1771 View Post
Bulldozer will have much higher memory standards. We have heard that the memory controller will be (OFFICIALLY) rated to 1866Mhz - this is above 1333Mhz on most current IMCs. Whether it will still respond better to lower timings or more to speed we don't know, but the integrated memory controller will most certainly be improved and drastically different.

AM2 is socket 938, not socket 939. Don't confuse people here, in addition there is another socket 939 (simply named "socket 939") supporting CPUs with a DDR memory IMC.
sorry I mistyped
    
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post #25 of 74
Quote:
Originally Posted by xd_1771 View Post
Bulldozer will have much higher memory standards. We have heard that the memory controller will be (OFFICIALLY) rated to 1866Mhz - this is above 1333Mhz on most current IMCs. Whether it will still respond better to lower timings or more to speed we don't know, but the integrated memory controller will most certainly be improved and drastically different.

AM2 is socket 938, not socket 939. Don't confuse people here, in addition there is another socket 939 (simply named "socket 939") supporting CPUs with a DDR memory IMC.
All modern AMD chips are Socket 940 after Socket 939 got replaced. AM3 CPU's are used in the same Socket 940 but only have 938 pins.

Quote:
Originally Posted by StuffStuff1 View Post
Well you know DDR2 Aint all bad

I mean there are some sticks of DDR2 that can out perform any thing we have.

And i was sighing because i thought i was being clear not because DDR2 is getting old.
My bad, it sounded like you were sad to see DDR2 go by by.

Quote:
Originally Posted by Maelthras View Post
It's best to wait until am3+ and bulldozer comes out to buy memory cause the max speeds will likely not be the same as current, 1866 is pretty fast memory and if am3+ supports it without oc then get that when you buy the setup.
Trusted review after trusted review show that there is almost no real world advantage to either RAM speed or latency (DDR, DDR2 or DDR3) unless you care for saving a few seconds or getting a few more FPS. And yeah, I'd agree that the current very low price of DDR3 should be taken advantage of quickly because that's sure to change like it did the last time memory was cheap. Grab the best kit of 8 gigs that you can afford before the price begins to climb again. Not that we really need more than 4 gigs but what the heck.
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post #26 of 74
Quote:
Originally Posted by MicroMiniMe View Post
Trusted review after trusted review show that there is almost no real world advantage to either RAM speed or latency (DDR, DDR2 or DDR3) unless you care for saving a few seconds or getting a few more FPS. And yeah, I'd agree that the current very low price of DDR3 should be taken advantage of quickly because that's sure to change like it did the last time memory was cheap. Grab the best kit of 8 gigs that you can afford before the price begins to climb again. Not that we really need more than 4 gigs but what the heck.
A few seconds piles up quickly..

I think your talking about the whole

CAS 1 @ 200mhz SD (adjusted)
CAS 2 @ 400mhz DDR
CAS 4 @ 800mhz DDR2
cas 8 @ 1600mhz DDR3

Where technically its the same speed?

(Al thought the DDR3 is faster)
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post #27 of 74
If you are waiting on DDR4, good luck. My guess is 2 years from now, minimum. And probably 3 years if you want speeds higher than DDR3.
post #28 of 74
Thread Starter 
I guess I will wait till Bulldozer motherboards come out since no one is certain about the memory. Hopefully they come out sooner before DDR3 prices rise.
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post #29 of 74
Quote:
Originally Posted by StuffStuff1 View Post
A few seconds piles up quickly..

I think your talking about the whole

CAS 1 @ 200mhz SD (adjusted)
CAS 2 @ 400mhz DDR
CAS 4 @ 800mhz DDR2
cas 8 @ 1600mhz DDR3

Where technically its the same speed?

(Al thought the DDR3 is faster)
There are other aspects -> like bandwidth

And the fact that DDR2 cas 4 @ 800MHz is nearly unheard of and probably cost $300+ for two sticks back in the day.


As far as I can tell DDR3 is very fast, the problem is how fast the chips can assess it. Just looking at AM3 chips and NB frequency we see big gains from increasing its speed.

Going from a 1090T with DDR2 at nearly 1200 MHz cas 5 to my current setup I've seen a massive gain in everything from bandwidth to even latency.

I would say our cpus and how they communicate with DDR is the real bottleneck, not the DDR3 itself.
    
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post #30 of 74
Quote:
Originally Posted by StuffStuff1 View Post
A few seconds piles up quickly..

I think your talking about the whole

CAS 1 @ 200mhz SD (adjusted)
CAS 2 @ 400mhz DDR
CAS 4 @ 800mhz DDR2
cas 8 @ 1600mhz DDR3

Where technically its the same speed?

(Al thought the DDR3 is faster)
I think you need to do some more reading real hardware reviews on RAM. A few seconds piles up quickly on highly specialized and highly repetitive tasks. Real world use would see almost no difference. What do the people of this forum doing that requires them to save a few seconds or get a few more frames per second. If you want speed then get a faster CPU. If you want to get a bigger monitor and need more frames per second get a better video card. Getting faster RAM or lower latency RAM is a waste of money and therefore a poor value.

Quote:
Originally Posted by BallaTheFeared View Post
There are other aspects -> like bandwidth

And the fact that DDR2 cas 4 @ 800MHz is nearly unheard of and probably cost $300+ for two sticks back in the day.


As far as I can tell DDR3 is very fast, the problem is how fast the chips can assess it. Just looking at AM3 chips and NB frequency we see big gains from increasing its speed.

Going from a 1090T with DDR2 at nearly 1200 MHz cas 5 to my current setup I've seen a massive gain in everything from bandwidth to even latency.

I would say our cpus and how they communicate with DDR is the real bottleneck, not the DDR3 itself.
I seriously doubt you've seen anything massive in anything except artificial benchmarks that have nothing to do with real world apps or games. Speed is bandwidth and timing is latency. Neither one makes a whole heck of a lot of difference and I would encourage that you go back and read some real world reviews on the subject. Try HardOCP for a start because they debunked this myth years ago.
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