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GPU Core Or GPU memory?

post #1 of 8
Thread Starter 
Hi Folks,
I'm trying to pin down which is the one that would give me the most bang per MHz on my ATI Radeon HD 5770. I'm using MSI and I have 5 profiles saved in it that I have been trying out.

The GPU's maximums are 960MHz core and 1445MHz memory. I have had it as high as 960/1440 but that got me about 10 minutes before the stability gave out. I'm presently running it at 955/1330 but I really haven't given that a fair test yet.

So far, I seem to hold up pretty good most of the time at around 935/1380. I go by how long I can stay in FSX as to whether or not to increase or decrease the 2. 935/1380 is OK but I still have to back off my scenery adjustments when I get into some complex conditions.

But my question is, which of the 2 numbers would give me the biggest punch per MHz increase? I'm guessing that if I can increase my core to 950, (with intent on keeping it there), and start bringing my memory speed up 3 MHz at a time, from say 1310MHz, that I would get better results in the FPS and stability than if I did it the other way around.

As I said, that is a guess and is pretty much based on nothing I know or read. So I'd like to hear what some of you think is best when it comes to OCing the GPU. Hold the memory and raise the core and then chase after the core a little at a time with memory increases? Or raising them both equal amounts? Any takers?

BTW, I already know that FSX needs more CPU than GPU but I pretty much have taken the CPU as far as I can. The GPU temps aren't that bad at the numbers I mentioned, (I've seen nothing higher than 67C), but I think if I pick up the GPU a little more I may get just a little better results... I don't know.
post #2 of 8
The core is more significant. Get that up as high as desired and then move on to the memory.
post #3 of 8
Like with the PC itself higher CPU clock make more fun than a high RAM frequency can deliver biggrin.gif
BTW: if you o.c. your card please have a look@your temps.
You don`t want to game 5hrs and have a fried card, do you?!
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/* Redemption*/
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SyncMaster P2770HD and SyncMaster 940NW Roccat Isku Corsair Gold AX750 NZXT 810 Switch 
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post #4 of 8
Thread Starter 
Thank you all! That is what I suspected. As for the temps on the GPU, I have read over and over that the ATI cards can handle as much as 85C or even more. I still don't know how true that is but the highest temp I saw so far, (GPUZ), was about 67C.

My CPU recently got to 51C for a short time but since I added that H-50 Liquid cool by Corsair, I pretty much don't run any hotter than 48C.
Thanks again.

PS I have Plans for building one, (computer), from the ground up with an i7 and Asus motherboard. This mobo that came in the HP is locked tight and I can't get to all I need.
post #5 of 8
GPU's can handle ~125C. My old 3870 ran at over 110C for months and I still have it lol.

Of course you don't want it getting that high since it will heat up your case.
i7k
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i7k
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post #6 of 8
Thread Starter 
Thank you for the confirm Yvese! Yes, that's what I read but I didn't mention that temp because it was so high. However, more and more I run into folks like yourself that assure me these GPU's have no problem with 80, 90 and 100C.

So I have to beleive that if my gpu isn't making it to 70C that I'm fine as far as temps go.
Thanks again.
post #7 of 8
Quote:
Originally Posted by Yvese;13614025 
GPU's can handle ~125C. My old 3870 ran at over 110C for months and I still have it lol.

Of course you don't want it getting that high since it will heat up your case.

You mean 105c; 125 is a bit out of the thermal threshold. wink.gif
    
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LG/SAMSUNG IBM MODEL M CORSAIR THERMALTAKE 
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MS INTELLIMOUSE EXPLORER 3.0 REGULAR LARGE PAD ONBOARD but it USED TO BE A XONAR DG  
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post #8 of 8
Thread Starter 
Thank You GanjaSMK, (I like the name),
I must admit that 125C sounded a little extreme but I certainly have seen 100's in and around assorted websites that cover this kind of thing. Then again, as Yevse pointed out, the case heat would become a bigger issue and then the CPU and so on.

Fortunately, my GPU rarely sees 63C since I recently added another fan that slides into one of my 3.5" hard drive bays and pulls additional hat air out and away from the case. (I need to update my comp specs section)

This is the name and the link is to the eBay site where I found it for only $3.00. I actually found some places selling this fan for as much as $30.00!:
Just Cooler ST-900 Case Exhaust Fan w/4-Pin Connector

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&rd=1&item=110580117247&ssPageName=STRK:MERFB:IID
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