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1600mhz vs 1866mhz vs 2133mhz (and timings) for Folding.

post #1 of 10
Thread Starter 
Hey Guys,

Im looking to upgrade my 8gb of 1333mhz 9-9-9 to something better for 24/7 folding. Not to sure which one is better but I figured if I am going to spend over $40, why not look into the whole spectrum and get the best.. I am also considering (4x2gb) but I dont know if it addes anything over the (2x4gb)

Figured I would stay to G.Skill Ripjaw X Series for the price and quality.
Color doesnt matter all that much to me.. But my mobo is blue and the blue ones offer a better stock timing for an extra couple bucks (expect at 1600 its $30 difference)

1600mhz

1600mhz @ 9-9-9-24 = $46.99
http://www.newegg.com/Product/Product.aspx?Item=N82E16820231428

1600mhz @ 8-8-8-24 = $74.99
http://www.newegg.com/Product/Product.aspx?Item=N82E16820231445

1866mhz

1866mhz @ 9-10-9-28 = $59.99
http://www.newegg.com/Product/Product.aspx?Item=N82E16820231455

1866mhz @ 8-9-8-24 = $64.99
http://www.newegg.com/Product/Product.aspx?Item=N82E16820231447

2133mhz

2133mhz @ 11-11-11-30 = $69.99
http://www.newegg.com/Product/Product.aspx?Item=N82E16820231468

2133mhz @ 9-11-10-28 = $79.99
http://www.newegg.com/Product/Product.aspx?Item=N82E16820231476

I know in most real world applications the mhz and timing wouldnt make a difference. However this is for folding and it would make a bit of a difference. That and I dont want to buy RAM again for awhile..

Thanks for any and all help!
post #2 of 10
my suggestion is these mushkin http://www.newegg.com/Product/Product.aspx?Item=N82E16820226189 9-11-9 -27@2133
    
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post #3 of 10
Thread Starter 
I was looking at muskins because I heard they were great chips but they were all like $100 and had only ok timings.

These chips say there 2000mhz.. Did you overclock yours?

Whats better a higher mhz or a lower timing?
Edited by JMattes - 1/29/12 at 5:03pm
post #4 of 10
I'm not sure why you think the frequency and latency will make a tangible system performance difference in folding when it doesn't in anything else?

Personally I feel it's a total waste to upgrade your current RAM but it's your choice. I expect you're going to be deeply disappointed in the end results. redface.gif

Actual benchmark testing shows less than 1% system gain going from 1333 MHz. to 1600 MHz. with a Phenom II 965. There seems to be even less gain when going from 1600 MHz. to 1866 MHz. and on to 2133 MHz.

CAS latency shows even LESS than the 1% shown by going from 1333 Mhz. to 1600 MHz. because as frequency increases, 1 clock cycle = less real time. Since DDR3 RAM is not a system bottleneck, it's obvious why it doesn't show any tangible system gains.

As far as how many DIMMs to use, 2 DIMMs are always preferred over four DIMMs for the same total RAM when using a dual channel mobo. Four DIMMs is more work for the Integrate Memory Controller (IMC), in the CPU to access.

If money isn't an issue and you want some future-proofing then the 1866 or 2133 rated RAM will accommodate FX or Vishera CPUs. Otherwise any of the 2x 4 GB. RAM kits from 1333 MHz. on up will be just fine.

ANY of the name brand RAM approved for your CPU will offer viturally identical performance if similar in frequency. Be aware of top mounted heatsink clearance issues on some HSFs also.

For the record most Deneb CPUs will only allow RAM to run OC'ed at 1600-1800 MHz. Thuban CPUs typically will allow 1800-2000 MHz. RAM. FX CPUs can go as high as 2400 MHz. in some instances.

Unfortunately there is no tangible system performance gain with these RAM OCs for any applications other than Llano APUs where the CPU and GPU both get to both use the OC.

OC'ing your CPU is however very advantageous even if you need to Lower the RAM frequency to allow higher CPU OC'ing.
Edited by AMD4ME - 1/29/12 at 5:14pm
post #5 of 10
Faster ram will make a real difference for folding. I saw a gain of a few minutes per frame when upgrading from 1600 to 2133 with higher timings.

So I'd suggest higher speed, then tighter timings in that order.
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post #6 of 10
Thread Starter 
I was told that when folding bigadv (which I hope to fold) that having better ram would make a difference. As far as smp folding goes, you would be correct and ram woudlnt matter. As this is second hand information I dont know honestly. But i heard I could see a 1-3k gain per day with better ram and over the course of a month would be an extra day or folding and over a year of folding could be well a decent gain in points..

However I can not prove this.. So you may simply be right. Id just like to buy RAM chips regardless and looking for thoughts on whats best I guess. Hoping I would see a gain..

So recommendations?

gsa700: Thanks for the confirmation. Whats your recommendation?
Edited by JMattes - 1/29/12 at 5:13pm
post #7 of 10
yes since my mobo doesn't give the option of 2000mhz I set them to 2133 and they have been perfect ever since. They are cheaper than the gskills and have better timings.
    
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post #8 of 10
Quote:
Originally Posted by JMattes View Post

gsa700: Thanks for the confirmation. Whats your recommendation?

I've got G.Skill 2x4 GB 2133 9-11-12 kit that are excellent. I've also got a set of 2x2 GB Corsair Dominator GT at 2000 8-9-8. (Runs at 1866 due to sandy bridge multiplier)

I saw a drop on both systems of between 1 and 2 minutes per frame. That is substantial on a 6903/6904 WU. Maybe less so on a regular SMP but I'd say faster is better than tighter timings. If you can get both, even better. But I wouldn't spend a lot extra to get better timings if I were you.
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post #9 of 10
Thread Starter 
Well the G.skill 2133mhz chips are $69 for the worst stock timings.. So an extra $5-$10 for tighter timings is just an extra investment or 2 cups of coffee if you think about it.. Lol..

Im thinking about those 200mhz mushkins, but overclocking overclocking them to 2133mhz and then running my blck at 102.. hmm wondering if they would be stable or if i would be better off with the 2133mhz g.skill for $5 and 1 point difference in timing.. I dont know what a point or 2 difference means. hmm.. #geekproblems
post #10 of 10
Quote:
Originally Posted by AMD4ME View Post

I'm not sure why you think the frequency and latency will make a tangible system performance difference in folding when it doesn't in anything else?
Personally I feel it's a total waste to upgrade your current RAM but it's your choice. I expect you're going to be deeply disappointed in the end results. redface.gif
Actual benchmark testing shows less than 1% system gain going from 1333 MHz. to 1600 MHz. with a Phenom II 965. There seems to be even less gain when going from 1600 MHz. to 1866 MHz. and on to 2133 MHz.
CAS latency shows even LESS than the 1% shown by going from 1333 Mhz. to 1600 MHz. because as frequency increases, 1 clock cycle = less real time. Since DDR3 RAM is not a system bottleneck, it's obvious why it doesn't show any tangible system gains.
As far as how many DIMMs to use, 2 DIMMs are always preferred over four DIMMs for the same total RAM when using a dual channel mobo. Four DIMMs is more work for the Integrate Memory Controller (IMC), in the CPU to access.
If money isn't an issue and you want some future-proofing then the 1866 or 2133 rated RAM will accommodate FX or Vishera CPUs. Otherwise any of the 2x 4 GB. RAM kits from 1333 MHz. on up will be just fine.
ANY of the name brand RAM approved for your CPU will offer viturally identical performance if similar in frequency. Be aware of top mounted heatsink clearance issues on some HSFs also.
For the record most Deneb CPUs will only allow RAM to run OC'ed at 1600-1800 MHz. Thuban CPUs typically will allow 1800-2000 MHz. RAM. FX CPUs can go as high as 2400 MHz. in some instances.
Unfortunately there is no tangible system performance gain with these RAM OCs for any applications other than Llano APUs where the CPU and GPU both get to both use the OC.
OC'ing your CPU is however very advantageous even if you need to Lower the RAM frequency to allow higher CPU OC'ing.

This guys on Sandy Bridge.

Phenom 2's IMC is very old and inefficient compared to SB which happily enjoys the extra bandwidth........ wink.gif
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