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  Question about IMC for 16GB DDR3-1866 or 8GB DDR3-1866? 
 
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SuPeR Xp Nov 02, 2011, 09:42pm EDT Reply - Quote - Report Abuse
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I was told that 16GB (4GB x 4) of DDR3-1866 would put a lot of pressure on a Dual-Channel Integrated Memory Controller via an AMD FX CPU and either 4GB (2GB x 2) or 8GB (4GB x 2) is recommended.

Anybody have information about this? Will 16GB of DDR3-1866 overwork the IMC? I think not, these things are created to take a dump load of memory. Correct me if I am wrong.

Reason why I am asking, I have parts for a AMD FX build.
GSkill RipJaw 16GB (4GB x 2) DDR3-1866
ASUS Crosshair V Formula
Corsair H100
Everything else will be used from my current setup...

Thanks :)


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john albrich Nov 02, 2011, 10:01pm EDT Reply - Quote - Report Abuse
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Edited: Nov 02, 2011, 11:08pm EDT

 
>> Re: Question about IMC for 16GB DDR3-1866 or 8GB DDR3-1866?
.
I think the question is not will 16GB "overwork" the IMC, but even if it does "overwork" the IMC, will that cause additional problems or degrade the performance vs. 8GB?

Even if 16GB does "overwork" the IMC, if you still get better real-world performance over an 8GB configuration and there are no newly created hardware problems, then is there any real practical issue with which to be concerned?

Since you seem to have the hardware, I'd be interested if you did an evaluation on both configurations and let us know how it goes re your specific hardware and software environment. I think a number of us HWA'ers are also looking at trying an AMD-FX.

(BTW, I think in your hardware list you meant "4GBx4" instead of "4GBx2"...unless you meant "8GB" instead of "16GB".)

SuPeR Xp Nov 03, 2011, 04:52pm EDT Reply - Quote - Report Abuse
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>> Re: Question about IMC for 16GB DDR3-1866 or 8GB DDR3-1866?
Thanks for your reply. Yes I did mean 4GB x 2 for 8GB and before I posted that I said 4GB x 4 for 16GB.

O.K. once I get a AMD FX CPU I will do tests with 8GB and in 16GB. I too am curious about this. I mean, maybe the IMC will get worked hard with 16GB, that is what it was meant to do, but if it does gain you better performance, than it's worth the upgrade. Also DDR3 memory are super cheap now. :)

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mothow Nov 03, 2011, 06:51pm EDT Reply - Quote - Report Abuse
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Edited: Nov 03, 2011, 06:56pm EDT

 
>> Re: Question about IMC for 16GB DDR3-1866 or 8GB DDR3-1866?
I'm using 16gb's (4x4) with no problems.I'm not sure which has a better memory controller(AMD or Intel)but my 2600k doesnt seem to mind so I'm sure the new bulldozers imc wont have any problems with 16gb's

ASRock Z97 Extreme 4 / i7 4790K / Corsair H80i / 4x4GB Crucial Ballistix Smart Tracer DDR3 1600 / 1TB Western Digital Caviar Black / 240GB Mushkin Chronos Deluxe SSD / 2x Evga GTX 670 FTW 2GB in SLI / Sound Blaster Recon3D Fatal1ty / Corsair HX1000w
SuPeR Xp Nov 03, 2011, 07:33pm EDT Reply - Quote - Report Abuse
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>> Re: Question about IMC for 16GB DDR3-1866 or 8GB DDR3-1866?
I think AMD used to have a better memory controller up until Intel released it's Tri-Core IMC. Bulldozer's is much better than the older Phenom II's by far. Dam Bulldozer just needs to get tweaked better.

Thanks guys,

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Dublin_Gunner Nov 03, 2011, 08:13pm EDT Reply - Quote - Report Abuse
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>> Re: Question about IMC for 16GB DDR3-1866 or 8GB DDR3-1866?
I think the more prudent question would be, WTF do you want 16GB for? 8GB is probably twice as much as you need for pretty much anything apart from rendering huge video's or a server.

Lancool PC K62
Phenom II x3 @ 3.5Ghz
4GB DDR2-800
ASUS GTX570 DirectCU II
G. G. Nov 04, 2011, 10:58am EDT Reply - Quote - Report Abuse
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>> Re: Question about IMC for 16GB DDR3-1866 or 8GB DDR3-1866?
Dublin_Gunner said:
I think the more prudent question would be, WTF do you want 16GB for? ................



Just for the fact that you can :P

My next build I am planning to stuff 16GB in her.

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mothow Nov 04, 2011, 04:22pm EDT Reply - Quote - Report Abuse
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>> Re: Question about IMC for 16GB DDR3-1866 or 8GB DDR3-1866?
G. G. said:
Dublin_Gunner said:
I think the more prudent question would be, WTF do you want 16GB for? ................



Just for the fact that you can :P

My next build I am planning to stuff 16GB in her.

Dam skippy i want 32gbs..lol

ASRock Z97 Extreme 4 / i7 4790K / Corsair H80i / 4x4GB Crucial Ballistix Smart Tracer DDR3 1600 / 1TB Western Digital Caviar Black / 240GB Mushkin Chronos Deluxe SSD / 2x Evga GTX 670 FTW 2GB in SLI / Sound Blaster Recon3D Fatal1ty / Corsair HX1000w
SuPeR Xp Nov 04, 2011, 07:35pm EDT Reply - Quote - Report Abuse
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>> Re: Question about IMC for 16GB DDR3-1866 or 8GB DDR3-1866?
Dublin_Gunner said:
I think the more prudent question would be, WTF do you want 16GB for? 8GB is probably twice as much as you need for pretty much anything apart from rendering huge video's or a server.

I would have to agree with G.G, ram nowadays is super cheap so why not go for a nice 16GB Dual-Channel setup at DDR3-1866MHz 8). Though I use my Gaming Rig for other things too which will benefit from more ram ;)

If I could get 32GB for a good price I would, but currently Corsair's 32GB kit (8GB x 4) runs for over $1000 :X

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G. G. Nov 04, 2011, 09:06pm EDT Reply - Quote - Report Abuse
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>> Re: Question about IMC for 16GB DDR3-1866 or 8GB DDR3-1866?
I have one of those CPU/Memory Usage gadgets thingie on my Vista side bar. Currently, sitting at desktop, it normally runs about 1.5GB of usage out of 4GB total. When I finish a round of BF3 and exit back to desktop, I notice this gadget shows all 4 cores going from north of 90% down to 0 and the memory does the same thing (100% then down to nominal 1.5GB).... So BF3 is really sucking up the resources.. I would think that if I had 8GB or more, that application like BF3 will hopefully run better.


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SuPeR Xp Nov 11, 2011, 07:44am EST Reply - Quote - Report Abuse
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>> Re: Question about IMC for 16GB DDR3-1866 or 8GB DDR3-1866?
Yes, the same applies to Metro 2033 and other games like Elder Scrolls IV Oblivion if my memory serves me well. With 16GB of Dual-Channel, You wouldn't need a super large page file, though disabling the page file is not a good idea, Windows 7 requires this from what I've read.

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john albrich Nov 11, 2011, 10:23am EST Reply - Quote - Report Abuse
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>> Re: Question about IMC for 16GB DDR3-1866 or 8GB DDR3-1866?
G. G. said:
I have one of those CPU/Memory Usage gadgets thingie on my Vista side bar. Currently, sitting at desktop, it normally runs about 1.5GB of usage out of 4GB total. When I finish a round of BF3 and exit back to desktop, I notice this gadget shows all 4 cores going from north of 90% down to 0 and the memory does the same thing (100% then down to nominal 1.5GB).... So BF3 is really sucking up the resources.. I would think that if I had 8GB or more, that application like BF3 will hopefully run better.


Just in case anyone reading this in the future doesn't yet know...installing more than 4GB of memory only helps here if you're using Windows 64bit. Otherwise it's a total waste of money. For more info specific to BF3 and 32 v 64bit performance, see http://www.reddit.com/r/battlefield3/comments/krt0p/bf3_32_vs_64_bit_os/

BF3 "Recommended" OS is Win7 64bit, with 4GB memory and quad core CPU.
The minimum is "Vista/Win7 SP2 32bit, 2GB memory, and >2GHz dual-core CPU.

<a class= Nov 11, 2011, 03:12pm EST Reply - Quote - Report Abuse
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>> Re: Question about IMC for 16GB DDR3-1866 or 8GB DDR3-1866?
Dam Bulldozer just needs to get tweaked better.


Dozer isn't much better than phenom II, I dunno what you've been smoking. Check the benches and etc...

_______________________________________________________
3930K @ 5.00Ghz | GA-X79-UD3P | 16Gb DDR3 | GTX770 | W7 x64
SuPeR Xp Nov 11, 2011, 10:25pm EST Reply - Quote - Report Abuse
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Edited: Nov 11, 2011, 10:26pm EST

 
>> Re: Question about IMC for 16GB DDR3-1866 or 8GB DDR3-1866?
Thanks for the info, I believe most of us are using Windows x64 bit editions.

Bulldozer is not a bad CPU, just needs some tweaking. Somebody explained it quite well in regards to it's design, the reason for the high clock speeds and the new 32nm HKMG process that is currently problematic.

Other Thoughts: What NEXT?
With the fact that Piledriver (Bulldozer II / AMD FX2 within Q1 2012 based on Socket AM3+) is being released so soon I believe that AMD knew about Bulldozer's minor design issues (Branch Prediction, Pipeline Flushing, Cache Trashing, Decode unit not wide enough etc. which all need to be TWEAKED.) but instead counted on higher frequencies to make up until Piledriver (Bulldozer II - AMD FX2)should be released via Socket AM3+.

Anandtech's review also shows that cache latency is worse than Phenom II.

Both problems can be blamed on Global Foundry's poor 32nm process yields.

Cache latency can be increased and clock speeds lowered to get higher yields.

I think that AMD saw the problems that needed re-working but decided that clock speed would be enough to counter them for the time being but then a few months later they find that yields were too poor and had no choice but to launch as is.


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SuPeR Xp Nov 23, 2011, 10:02am EST Reply - Quote - Report Abuse
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>> Re: Question about IMC for 16GB DDR3-1866 or 8GB DDR3-1866?
sovietdoc said:
Dam Bulldozer just needs to get tweaked better.


Dozer isn't much better than phenom II, I dunno what you've been smoking. Check the benches and etc...

I'm smoking the good stuff. Bulldozer's IMC is better than PII's. This is a fact. I am talking about Memory Benchmarks.

Anyhow there's an issue with the OS throttling down Bulldozer cores when it's not suppose to. Until a fix gets released, I believe you can disable core throttling via Bios and/or AMD OD.

Also, just found out Skyrim is currently capped at 2GB of memory which is stupid because I patched it to accept more than 2GB and it rendered high quality textures no problem with MAX PQ. The game was sucking back over 3.5GB of memory while in game. Now with the latest patch, the company disabled my update and once again capped the bloody game at 2GB and to run on 32-bit mode. Now I am back wwith the game only using less than 1.5GB of ram.

Now I am once again forced to drop PQ for playable frame rates.

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<a class= Nov 23, 2011, 05:11pm EST Reply - Quote - Report Abuse
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>> Re: Question about IMC for 16GB DDR3-1866 or 8GB DDR3-1866?
wtf is the point of capping a game with 2gigs of ram, especially how ppl usually have 4-8 as a standrard now.

_______________________________________________________
3930K @ 5.00Ghz | GA-X79-UD3P | 16Gb DDR3 | GTX770 | W7 x64
Michael C Nov 24, 2011, 09:50am EST Reply - Quote - Report Abuse
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>> Re: Question about IMC for 16GB DDR3-1866 or 8GB DDR3-1866?
I used the Skyrim HD 2k texture pack and it make no difference in performance. I honestly don't think it looks that much better though.

SuPeR Xp Nov 26, 2011, 08:50am EST Reply - Quote - Report Abuse
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Edited: Nov 27, 2011, 10:53am EST

 
>> Re: Question about IMC for 16GB DDR3-1866 or 8GB DDR3-1866?
That's the problem when you get a simple console game port onto PC. They made a big mistake creating Skyrim based on the XBOX 360, a age old console. This is why they have the 2GB limit.
Ask yourseft why people need to modify the game for better PQ :P

Have you guys seen some modded texture around the internet for Skyrim? Dam wonderfully looking, it makes Skyrim's graphics AMAZING. The only thing it requires is PC's with 4GB of Ram or more which means you will have to patch the game to use more than it's 2GB limit.

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Dublin_Gunner Nov 29, 2011, 06:21am EST Reply - Quote - Report Abuse
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>> Re: Question about IMC for 16GB DDR3-1866 or 8GB DDR3-1866?
sovietdoc said:
wtf is the point of capping a game with 2gigs of ram, especially how ppl usually have 4-8 as a standrard now.



32bit system support. Simple.

Lancool PC K62
Phenom II x3 @ 3.5Ghz
4GB DDR2-800
ASUS GTX570 DirectCU II
SuPeR Xp Dec 01, 2011, 08:51pm EST Reply - Quote - Report Abuse
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Edited: Dec 01, 2011, 08:54pm EST

 
>> Re: Question about IMC for 16GB DDR3-1866 or 8GB DDR3-1866?
Dublin_Gunner said:
sovietdoc said:
wtf is the point of capping a game with 2gigs of ram, especially how ppl usually have 4-8 as a standrard now.



32bit system support. Simple.

The recommended system spec calls for 4GB of RAM ;)

Anyhow, you mean a completely gutted out Skyrim Console Port onto the PC is what killed this game. Without MODS, the game looks average. And now they disabled us from modding the bloody game. Anyhow somebody is working on a patch to help push at least 8GB of ram through that game 8)

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SuPeR Xp Dec 01, 2011, 08:52pm EST Reply - Quote - Report Abuse
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Edited: Dec 01, 2011, 08:54pm EST

 
>> Re: Question about IMC for 16GB DDR3-1866 or 8GB DDR3-1866?
Double Post - Delete Please...

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