GPU core vs. mem

Telecaster

Telecaster

Telecaster

Soldato
Joined
17 Jun 2012
Posts
5,951
So I'm quite new to overclocking and was just wondering about the relationship between GPU core clock and mem clock, are they linked in any way or is simply just a case of finding the stable limit of one and then doing the same for the other? Or can one have an effect on the other?
 
You can clock one and not the other. If you really want to push **** you might find that there's a "golden" ratio between core and RAM. But for normal overclocking you shouldnt really encounter anything like that.
 
Thanks, what I was trying to get at is whether one will effect the other's overclocking performance? So if I find the limit of the core clock will that stay stable no matter what I do with the mem clock?
 
Telecaster said:
Thanks, what I was trying to get at is whether one will effect the other's overclocking performance? So if I find the limit of the core clock will that stay stable no matter what I do with the mem clock?
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Not necessarily, it might, depends on card, architecture, RAM. But PROBABLY core will stay stable no matter what. Just try it out man you wont hurt anything as long as it stays cool.
 
Will give it a go. Are the signs the same when either are unstable, or do they fail in different ways? I'm just wondering how you tell which is causing instability.
 
I found quite the opposite on my cards, must depend on the card i guess. On my best card if i overclock the core first i ended up with roughly 1320/1800mhz, but if i overclocked the mem first i ended up with 1280/2000mhz. In the end i settled with about 1310/1950 i believe, cause it gave me the highest heaven score.

I founds increasing the core to almost its max, then overclocking the mem after worked best for me as it gave higher scores, but i remember reading a post a week or two ago from 8pack saying he got better marks out of his card running at a lower speed, cause he tweaked the mem timings. That involves changing the card bios though, ive always just left my bios as stock.

Like Ranger says just give it a go, you might find things are completely different on your card.
 
Telecaster said:
Will give it a go. Are the signs the same when either are unstable, or do they fail in different ways? I'm just wondering how you tell which is causing instability.
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Unstable cores will cause artifacts that look like colored stars or flowers, RAM can have horizontal lines or black bars or just lock up with a black screen.
 
To test for instability just test one at a time, but generally when i was testing mine i found that core to high cause the driver to crash, but mem to high caused a hang. If you increase the slowely enough you should see artifacting that lets you know you have hit the limit anyway.
 
BluD said:
I found quite the opposite on my cards, must depend on the card i guess. On my best card if i overclock the core first i ended up with roughly 1320/1800mhz, but if i overclocked the mem first i ended up with 1280/2000mhz. In the end i settled with about 1310/1950 i believe, cause it gave me the highest heaven score.

I founds increasing the core to almost its max, then overclocking the mem after worked best for me as it gave higher scores, but i remember reading a post a week or two ago from 8pack saying he got better marks out of his card running at a lower speed, cause he tweaked the mem timings. That involves changing the card bios though, ive always just left my bios as stock.

Like Ranger says just give it a go, you might find things are completely different on your card.
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Yep, here you can see core affects RAM and vice versa, but this is not the average overclock keep that in mind. And its only when you start pushing things that you might encounter this.
 
yeah idd, its when your hitting the limits, a small overclock of either wont effect the other
 
Rangerjr1 said:
Telecaster, which card are you ocing?
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It's only a 750ti, nothing beefy. So far it's gone from 1080mhz boost to 1380 and from 5700mhz on the mem to 6600. It ran Firestrike and Heaven a couple of times with no problems but last night the display driver crashed at random times, I'm guessing it was the memory.
 
Telecaster said:
It's only a 750ti, nothing beefy. So far it's gone from 1080mhz boost to 1380 and from 5700mhz on the mem to 6600. It ran Firestrike and Heaven a couple of times with no problems but last night the display driver crashed at random times, I'm guessing it was the memory.
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Im not experienced with Nvidia cards and ocing them, but from what i know what usually causes driver crashes are unstable cores, even though its not artifacting.
 
Coincidently I've got a 750Ti right here going into my HTPC, I'll see what it can do this week and let you know. Maxwell tends to be a lot more firm in terms of error correction. Kepler used to allow for a large scale disco in terms of artefacts where as Maxwell is a lot more - "STOP."
 
I hope its passive and active cooling, if it was just passive i might not overclock it to heavily my self :)
 
Completely passive, idles @ 24 degrees, left it running Heaven fully overclocked whilst I went and did some stuff, came back and it was at 52 degrees.

That is in a tiny MITX case as well, impressive stuff.
 
Telecaster said:
Cool thanks, I'll keep an eye out. Great card BTW, for the money I can't fault it, passive as well which is great.
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Built it up the other night but not had much chance to test it. My son played Sonic Racer on it though last night and 1080p 60fps no problem with high quality :p.

Some might be thinking er, so? But my experience recently with mid tier GPU is some what limited, colour me a little impressed though for £100 ;)
 
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