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AMD Bulldozer FX 1866MHz+ - Page 3

post #21 of 32
I'll defiantly will get my FX 8150 with Mushkin Enhanced Redline 2X4GB 2133MHz !

Good thread !
post #22 of 32
I will be nabbing up a 8150, most likely from Newegg.com when they come available again. I have some 1600 and 1866 RAM I am going to test with it. Both are Corsair Vengeance series RAM. Curious to see how much performance is effected on my end.. Going to toy with OC'n the RAM as well and see where that goes..
post #23 of 32
Quote:
Originally Posted by linkin93 View Post
It is nice to see that BD can actually run with that speed of RAM, as opposed to Phenom II that refuses to boot my 1600MHz sticks at their rated timings of 6-8-6-24

You know what, in a month or two, after I have my 8120, and BIOS's have been thoroughly updated, and software patches/CPU drivers are all done, I will proudly dance around and say: "I told you so! :whee: " - and if that doesn't happen, I'll eat a hat and post it youtube.
I'll be looking forward for the video .
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post #24 of 32
Quote:
Originally Posted by Blameless View Post
You removed my last post which was completely on topic.

Anyway, memory simply doesn't influence performance all that much in the overwhelming majority of situations. Even if it did, the performance difference between 1600 and 1866 is completely trivial.

You would be hard pressed to see the difference between 1066 and 2133 in practical situations. Bulldozer didn't change this. There is no evidence of some magically arbitrary cut off for DDR3-1866.

Yes, you will likely be able to measure a minuscule improvement in performance with faster memory, but you would be way better off just getting DDR3-1600 and spending the rest elsewhere.



No they don't. Not in any practical scenario.



2400 isn't JEDEC certified yet, has just shown up, and costs a fortune.



It's not even remotely needed.
This is where I'll have to disagree with you sir. Memory can and does influence performance in an observable way. However, this is where you'll have to weigh the performance difference between increased bandwidth and tighter timings. I personally have found that tighter timings have more impact on performance, which is observable at keyboard level, than increased bandwidth. However, both are important.

With tightened timings, you can get away with lower frequencies and actually have the same, if not better performance than what the theoretical increase in bandwidth might give you since the clock cycles are faster in a given period of time. In actuality, you're heading towards the same end, just in different methods.

With that said, try it yourself. Take your RAM lower the frequency and tighten up the timings. Even try 1066 @ CAS 5. What you'll readily notice is that your rig should "feel" a little bit more "snappy" and appear quicker. I experimented with this on both my AM3 and this i7, and have come to the conclusion that tighter timings are wholly more important.
The first thing that caught my attention was a decrease in loading time. In BFBC2 I would always be loaded up by the time the second or third spawn cycle was going. After dropping the frequency and tightening up the RAM to CAS 5, I would always load up before the first spawn cycle and would have to wait for it. Aside from that, even on the desktop level, everything was just faster.

There are some benchmarks, even on here, if you so choose to look for them, that will wholly depict exactly what I've described. Lower frequencies coupled with tight timings = faster performance.
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post #25 of 32
While thats true i believe blameless is basically referring to what your stating Omega. That higher speed memory is not going to give substantial gain over lower speed memory due to different timings. As you said you can achieve greater performance out of CAS 5 1066 than say 1600 @ CAS 9 9-9-9-27/2T. Kind of like a double edged sword when getting memory if you want more speed you pay by adding more latency, you can always tweak those timings but in my experience the higher the ram speed the more significantly harder it was to achieve tighter timings at a desired speed. Although i bought DDR3 2000 so i would never have to worry about overclocking my Ram to keep up with my CPU incase my board didn't provide the correct divider. With my intel systems i always stopped at 400mhz on the FSB so i could have a 1:1 ratio with the CPU, was using Micron D9s at the time and didn't want to have to cook them to push them harder even though at the time people were having good results out of them. Just the way i look at it though maybe wrong, this is just how i've attempted to understand it.
Edited by Blackops_2 - 10/17/11 at 12:19pm
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post #26 of 32
Quote:
Originally Posted by Blameless View Post
You removed my last post which was completely on topic.

Anyway, memory simply doesn't influence performance all that much in the overwhelming majority of situations. Even if it did, the performance difference between 1600 and 1866 is completely trivial.

You would be hard pressed to see the difference between 1066 and 2133 in practical situations. Bulldozer didn't change this. There is no evidence of some magically arbitrary cut off for DDR3-1866.

Yes, you will likely be able to measure a minuscule improvement in performance with faster memory, but you would be way better off just getting DDR3-1600 and spending the rest elsewhere.



No they don't. Not in any practical scenario.



2400 isn't JEDEC certified yet, has just shown up, and costs a fortune.



It's not even remotely needed.
Bullocks. That would be a noticeable difference with Bulldozer.
http://www.madshrimps.be/articles/ar...#axzz1b4BEvOuG

The 3DMark and Mafia II numbers are the most striking, and that's only the difference between 1333 and 2133. 1066 would be worse.
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post #27 of 32
nice find but,
no one buys CPUs based on RAM Speeds... they buy RAM based on CPU compatibility.

+ in games u might see a 1fps gain from a 1333 to 1833MHz
might see improvements on winrar/cinebench/3dmark/etc whatever
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post #28 of 32
Good.. NOW i have to buy an even more expensive set of RAM in order to make BD works "properly"

no thank you
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post #29 of 32
Quote:
Originally Posted by omni_vision View Post
nice find but,
no one buys CPUs based on RAM Speeds... they buy RAM based on CPU compatibility.

+ in games u might see a 1fps gain from a 1333 to 1833MHz
might see improvements on winrar/cinebench/3dmark/etc whatever
Without knowing timings, you can't make that assertion. On my old AM3 rig I got approximately a 14.5% performance increase from getting the RAM tweaked just right.
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post #30 of 32
NVM. Is there a edit option to delete?
Edited by Blackops_2 - 10/17/11 at 4:30pm
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