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AMD Bulldozer FX 1866MHz+

post #1 of 32
Thread Starter 
Hey guys ,

All of you can remember DDR 400MHz and what impact was DDR2 667MHz and then 800MHz right ?
It went by 267MHz each time:
400<667<800<1066<1333<1600<1866<2133<2400

We know that AMD Bulldozer FX got Dual Channel DDR3 integrated memory controller (support for PC3-15000 (DDR3-1866)

Now , we saw that the Bulldozer can handle 2600MHz:
http://www.tweaktown.com/articles/43...ing/index.html

We saw in most of the reviews and benchmarks that i7 2600k kills the FX 8150 at low resolutions and with CFX/SLI setups , the cpu bottleneck the gpu:
Metro 2033 1024x768
http://images.anandtech.com/graphs/graph4955/41705.png

3xHD6970 CFX Metro 2033
http://cdn5.tweaktown.com/content/4/...z8g_MoX1Vt.png

Most of the review sites use setups with 1600MHz there was few with 1866MHz and even 1 review with 2133MHz...but if you really want to compare FX 8150 vs 2600k it should look like this :

Same clock speed
FX8150+1866MHz vs 2600k+1333MHz / FX8150+2133MHz vs 2600k+1600MHz / FX8150+2400MHz vs 2600k+1866MHz

If the review sites was testing like that the results was much more different then it was.

Check out how memory speed can change the whole story:
(random benchmarks of different ram speed's)

http://www.legitreviews.com/article/1647/5/

AMD FX 8150
http://www.madshrimps.be/files/users...ders/games.png

http://www.legitreviews.com/images/reviews/1070/re5.gif

http://www.ninjalane.com/images/hype...chart121-1.png

http://www.legionhardware.com/articl..._memory,6.html

http://www.legitreviews.com/images/reviews/770/grid.jpg

AMD FX 8150
http://www.madshrimps.be/articles/ar...#axzz1b4BEvOuG

For all the guys here who is building AMD setup you defiantly wanna go with FX 8120/8150 and 1866MHz+ , if you want AMD FX 8 core setup that = to Intel i7 2600k with 1600MHz , you'll need 2133MHz RAM (always 533MHz more)
Same thing for Phenom II x6 1100T , cause both Phenom II and Sandy Bridge use 1333MHz memory controller , and Bulldozer FX use 1866MHz.
Edited by Malcom28 - 10/17/11 at 5:35pm
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post #2 of 32
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.
post #3 of 32
So BD is probably a little better than most of the benchmarks show because they should be using faster ram with BD to show its real performance, OK. Even with fast ram BD is still just not at all impressive, especially for an 8 core CPU.
    
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post #4 of 32
Thread Starter 
Quote:
Originally Posted by Kirby1 View Post
So BD is probably a little better than most of the benchmarks show because they should be using faster ram with BD to show its real performance, OK. Even with fast ram BD is still just not at all impressive, especially for an 8 core CPU.
Even that the reviewers test the way i told about still there are lot of benchmarks that the FX8150 did very well against 2600k.

you can see it here:
http://www.overclock.net/amd-cpus/11...l#post15290283

Here in this thread it's more about the right system build for AMD Bulldozer and less about BD vs SB.
So ppl who build an AMD pc need to know about the memory part.
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post #5 of 32
Quote:
Originally Posted by Malcom28 View Post
Even that the reviewers test the way i told about still there are lot of benchmarks that the FX8150 did very well against 2600k.

you can see it here:
http://www.overclock.net/amd-cpus/11...l#post15290283

Here in this thread it's more about the right system build for AMD Bulldozer and less about BD vs SB.
So ppl who build an AMD pc need to know about the memory part.
If by did well you mean is often on par then OK I agree. I would not consider that doing well considering that BD just came out and SB has been out for a while, and no matter what ram you use SB still wins overall. Also make sure you take into account that BD seems to get 1-2 more FPS when the GPU is bottle necking the CPU so make sure your not factoring in any GPU limited tests.
    
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post #6 of 32
OP, I too noticed that many sites used DDR 1600 instead of the 1866 that BD is rated at. The one review I remember that addressed this did not show a big jump, although it looks like your madshrimps link shows a very healthy increase.

Quote:
Originally Posted by compuman145 View Post
TL;DR

What's the point you're trying to get to?

Comps

EDIT - Oh you're trying to justify the complete failure of BD.... Yeah that's not going to work. AMD screwed up, the only justifiable reason to get BD is if you already have an AM3 motherboard etc etc
Quote:
Originally Posted by compuman145 View Post
Ever heard the term "flogging a dead horse"?

Look, I have the upmost respect for AMD, they make great GPU's, they make cost effective CPU's but whichever way you cut the cake, BD was a complete disaster. It has been a massive let down for a massive majority of the IT community. 8 CORES DUDE!!! 8. And it still failed against the 4 core editions from intel, they weren't even the best intel has to offer.

Look, I know you're hoping, but it's just not going to happen.

Comps
http://en.wikipedia.org/wiki/Troll_(Internet)
post #7 of 32
DDR3-1600 vs 1866 is not a big deal performance. Also, DDR3-1866 offers worse performance per dollar, and would make BD even less appealing if it was needed for optimum performance..

Bulldozer is more accurately an eight core chip than a quad core. Regardless, the number of cores in and of itself is irrelevant. You still have chip that costs x amount that provides n performance for y power. Whether it takes one core or a million to get there doesn't mean a damn thing.
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post #8 of 32
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post #9 of 32
Quote:
Originally Posted by Blameless View Post
DDR3-1600 vs 1866 is not a big deal performance. Also, DDR3-1866 offers worse performance per dollar, and would make BD even less appealing if it was needed for optimum performance..

Bulldozer is more accurately an eight core chip than a quad core. Regardless, the number of cores in and of itself is irrelevant. You still have chip that costs x amount that provides n performance for y power. Whether it takes one core or a million to get there doesn't mean a damn thing.
+1 This is what most people don't seem to realize.

I'm waiting while saving my money to see what happens with BD maybe they fix the problems with software, maybe they don't. It could be a cache bug that could take another revision to work out, who knows. Fact of that matter is BD as of right now is a let down, but at the same time it's brand new architecture that's never been done before CPU wise and will take some time for them to get it right.
Edited by Blackops_2 - 10/17/11 at 7:34am
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post #10 of 32
Holding you to it.






however i suppose i do respect the op enough to still attempt to discuss ram for this processor. Bummer it didnt EXACTLY meet up to ANY expectations.
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