Did I go too high on the memory ?

[tweakboy]

Soo I heard these guys saying how if I OC too much this cards memory.., sigrig that it will actually perform slower. What is that about my mem is 2600 x 2 5200Mhz effective.. What should I do . Thanks in advance I love you all!


BTW video card shuts off comp when I go to high. Im playing a game and my computer shuts off. I was like wtf this used to be fine. Soo I know for fact CPU doesn't freeze ,, no shut down then I go maybe video card is culprit and I was right. once I put it on stock , no more system shutdowns



thx

 

[tweakboy]

Be aware of this shutdown video card issue guys...future OCers lol

 

[Arkadrel]

Only way to be sure is lower it say 200mhz test it, up it 100mhz test it, ect.

I cant remember off the top of my head why the GDDR do that when pushed to far, but theres a explaination for it.

Anyways... the fact that you can overclock ram to far, push them to far, and lose performance doing it... means you have to go test it to find the sweetspot.

 

[happy medium]

I run the crysis or far cry2 loop benchmark and when I start to lose fps, I cut back on the memory speed a tad.

The memory should be error correction memory thats why you lose performance sometimes before it artifacts.

Amd cards do the same thing , they also have error correction memory.

Tweakster, every time look at you card in your signiture I get jealous and want to buy a gtx560. Thats a great overclock my man.

 

[Cerb]

GDDR5 implement a CRC check for data, so instead of starting off with artifacts, when you push it too far, you will instead leave the memory controller resending a ton. In general, you're best to leave the RAM on a current nVidia card within 5-10% of stock, unless the RAM is rated higher...and even then, the controller itself might limit the RAM OC.

The good news is that there are very few cases where the RAM bandwidth on a 256-bit 400/500 Geforce is worth worrying about.

The memory should be error correction memory thats why you lose performance sometimes before it artifacts.

Not quite. It's only error-checking, which is what we need most, anyway. Bits flipping while the data is idle inside of RAM chips is rare enough to not matter for us poor consumers.

 

[LiuKangBakinPie]

It will hit thermal throttle slowing the card down when it gets too hot. That's the gpu core btw. You ram runs much hotter and will fry easier as there is nothing monitoring its temp. You don't want faster vram you want faster shaders to get performance

 

[happy medium]

The good news is that there are very few cases where the RAM bandwidth on a 256-bit 400/500 Geforce is worth worrying about.

The gtx560 is one of the few Nvidia cards that you will see good gains by pushing the memory,especially at 1000 core. The gtx560 SOC reviews show this to be true.

 

[Cerb]

The gtx560 is one of the few Nvidia cards that you will see good gains by pushing the memory,especially at 1000 core. The gtx560 SOC reviews show this to be true.

Which GTX 560 review? All the ones I know of couldn't get it even to +5%, and I haven't seen even one isolate GPU and RAM speeds when testing performance.

 

[OILFIELDTRASH]

How about a 580? I haven't touched the memory because I fear screwing it up. Would a slight overclock of the memory give me anything when core is at 902mhz?

 

[notty22]

I agree with most of the performance gains stem from the core o/c . On Nvidia cards this pushes the shader clocks X2.

On my cards the memory clocks are limited by heat, heat that must build up faster when clocked higher. I tested this one time by directing a high speed fan at the memory chips and I got them quite a bit faster than I usually could. On my card their are no ram sinks.

On the gtx 580 you could maybe push the memory clocks 9-10% and would probably result in (i'm guessing) another 1-2% in fps.

 

[happy medium]

Which GTX 560 review? All the ones I know of couldn't get it even to +5%, and I haven't seen even one isolate GPU and RAM speeds when testing performance.

I believe it was guru 3d. :thumbsup:

Edit: oh I see what your saying now.
Well some sites didn't overclock the memory and some did. The sites where the memory had a higher overclock showed the gtx560 SOC to be a good deal faster. I believe the memory speed on the SOC version is allready higher then a stock card also.

edit 2: yea here it is , the memory on a stock gtx560 is running at 4000, they got the card up to 4950.

http://www.guru3d.com/article/gigabyte-gtx-560-ti-soc-review/20

 

[OILFIELDTRASH]

I'm also making a mental note to never buy a card secondhand from Tweak. I'd be surprised if his videocard wasn't smoking after a gaming session. J/K

 

[Cerb]

On one hand, that is definitely over 5% on the RAM.
On the other, it does not isolate GPU/RAM speeds. The gains are at most 4% (3.4%, 3%, 4%, and 3%), with a 4.4% faster GPU clock. How much of it is GPU clock, and how much is RAM clock?

I'm also making a mental note to never buy a card secondhand from Tweak. I'd be surprised if his videocard wasn't smoking after a gaming session. J/K

LOL (really did).

 

[Diogenes2]

Did I go too high on the memory ?

If it caused problems, yes..

Otherwise, no ..

 

[Termie]

It's next to impossible that your memory overclock is stable at 1300: http://www.overclockersclub.com/reviews/nvidia_asus_gtx560ti/4.htm. The 1000 core is possible, however. Use Happy's method (looping benchmark) to check for reduced memory overclock performance. I'd start around 1100.