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View Full Version : How much oc'ing is worthwhile with a GTS


XDanger
08-12-07, 03:21 PM
My current oc is 660/950 but is there much point in gaming with clocks that high on a GTS or is it a case of the more the merrier?

Shocky
08-12-07, 04:02 PM
Drop to 648/945, clockspeeds work in steppings but yes the more the merrier.

SlieTheSecond
08-12-07, 06:58 PM
It depends on the game too. Some games will yield a .5 fps improvement while other may get you 10 fps.

jcrox
08-12-07, 07:13 PM
I usually do this: (it was really noticeable when I 1st got my 8800GTS and still had a 4000+)

Run 3DMark05 @ stock card speeds (I like 05 as 06 seems to be more CPU dependent, I could be wrong on that idea though)

I over clock the card to 550/850 and check the score

Over clock some more, I use 600/900 for my second run, and check the score again

From this point I up the clocks by 20/10 and continually check the score.

If your score keeps going up by a decent amount your oc is relevant, if your cpu limited you'll see your score level out and only go up minimally with the over clocks

XDanger
08-13-07, 02:52 PM
Yeah thats what I would have done but I seem to spend most of my time running benchmarks so I thought Id be lazy and just ask.
I see you settled for 600/900 jcrox

jcrox
08-13-07, 03:25 PM
Yeah, 600/900 works fine. It will run @ 660/1050 but I don't have any games that really need that high of an OC yet. Bioshock might change that though :D

SlieTheSecond
08-13-07, 06:34 PM
I wouldn't even touch 3d mark 05. Or any benchmarking software (only to see how well your computer is running compared to how it should be).

I would use games. There is only one or two games I overclock with. Oblivion being one. The reason being, it will get choppy at parts and I get a nice boost in fps with overclocking which smooths out gameplay.

Almost every other game I have, there is absolutely no difference between playing with it overclocked or not overclocked. Gaining an extra 5-20 fps in a game that never drops below 100 fps is a huge waste if you ask me.

But it also gets pretty damn hot in my room. In the winter I may leave the overclock on, but for the summer. I only use it when I need.

john19055
08-13-07, 10:24 PM
I seen a increase in my game performance with overclocking ,so I just flashed both of my Evga 8800GTS 640mb to 621/1458/900,but they would do 660/950 but i down clocked them to 621/900 because there was'nt that much difference from 660 to 621,besides the temperperture going up.

ATOJAR
08-14-07, 12:57 AM
I took the bios of a EVGA 8800GTS (KO.ACS³) 640MB and edited it to 612\1458\900 and flashed my stock GTS 640MB with that, i noticed a big difference in performance, also with my processor at 3.4GHz i got 10956 on 3DMark06!

conroejoe
08-14-07, 09:04 AM
Yeah, 600/900 works fine. It will run @ 660/1050 but I don't have any games that really need that high of an OC yet. Bioshock might change that though :D

The 8800GTS overclocks in steps. 621, 648, 675...

If you are selecting 660 you are at 648, if you select 663 it jumps to 675 mhz. Do some research on the steps, you are actually able to select 660 mhz, it drops to 648 core. The memory does go to the mhz selected however. Most GTS's wont do 675 without a voltage mod, mine wont' nor will 3 buddies of mine.

I'd like to note that my GTS is water cooled and has been flashed to 648/1000 and is faster than a stock GTX in most cases. It has crushed the 2900XT in comparisons that I've done (I own both). Unbelievably the GTS is much much much faster overclocked. Per clock cycle it's definitely worth overclocking. The 2900XT however, is not. With my OC I gained 2000 points in 3dmark and 20 - 30 FPS depending on the app, some like Lost Planet only gain 1-2fps. For the most part, anything other than dx10 games shows a very nice gain with the eye candy maxed. The 2900XT however from 743 to 860 core and memory up to 1020 only gains about 5 FPS. The 8800 architecture benefits alot from the overclock.

andy_nv
08-14-07, 09:36 AM
Scroll down a bit on this page (http://www.madshrimps.be/?action=gethowto&number=3&howtopage=190&howtoID=72) and you'll find the ROP/Shader clock table.
(note: memory clocks are independent of core clocks, you don't need to have a certain core clock to achieve a certain memory clock, but I guess you already know that)

Performance wise, I gained around 800 points in 3DM 06 by going from 600/1000 to 648/1053. As for games, it depends, Doom 3 seems to benefit more from the memory increase than core.
(I don't have default benchmarks for my GTS since I put it at 600/1000 from the day I got it :D)

conroejoe
08-14-07, 10:11 AM
Scroll down a bit on this page (http://www.madshrimps.be/?action=gethowto&number=3&howtopage=190&howtoID=72) and you'll find the ROP/Shader clock table.
(note: memory clocks are independent of core clocks, you don't need to have a certain core clock to achieve a certain memory clock, but I guess you already know that)

Performance wise, I gained around 800 points in 3DM 06 by going from 600/1000 to 648/1053. As for games, it depends, Doom 3 seems to benefit more from the memory increase than core.
(I don't have default benchmarks for my GTS since I put it at 600/1000 from the day I got it :D)


There ya go, so basically, yes it's worth OC'ing the GTS.

XDanger
08-15-07, 05:26 PM
Most GTS's wont do 675 without a voltage mod, mine wont' nor will 3 buddies of mine.

What happens bsods or artifacts? Ive not had any yet so I might TRY 675

SLippe
08-15-07, 07:25 PM
Rainbow Six Vegas is a good game to test your overclocks on. If it's too much, you'll notice flashing black boxes or flashing black starbursts. Mine did this even though I passed 3dmark06 with no problems. Games can be better to test overclocks out on.

andy_nv
08-15-07, 10:08 PM
What happens bsods or artifacts? Ive not had any yet so I might TRY 675
Personally I got a BSOD.

hoop
08-17-07, 07:47 PM
what tool we using to o'c your cards?

XDanger
08-17-07, 08:05 PM
Ati Tool because of the handy stress test.

ATOJAR
08-18-07, 06:42 AM
I used rivatuner v2.02, a mixture of 3dmark06 & ATi tool(stress tester) to find the max stable overclock for my card then i just done a bios flash ... been this way for months with not one problem! :D

SLippe
08-18-07, 08:30 AM
When you all use ATITool, do you all stop it after a certain time? I tried it once on my 7900GT and the damn thing went crazy...never stopped itself and the card reached 90' C or so. I got scared and stopped it. I've never used it since. I guess I really don't fully understand how to use it.

ATOJAR
08-18-07, 08:50 AM
When i ran atitool i started the stress tester and at the same time start the timer on my G15 keyboard, if the time on atitool reset at any time i can tell by my keyboard timer and then you know it has errored and the overclock is not stable! ... i ran for about 1 hour with no errors but i know alot of people say 20-30mins with no errors will do it! ....

SLippe
08-18-07, 08:54 AM
When i ran atitool i started the stress tester and at the same time start the timer on my G15 keyboard, if the time on atitool reset at any time i can tell by my keyboard timer and then you know it has errored and the overclock is not stable! ... i ran for about 1 hour with no errors but i know alot of people say 20-30mins with no errors will do it! ....
Alright, thanks.

Blacklash
08-18-07, 04:47 PM
IMO yes it's worth it. Most folks should be able to do 580-660 on the core. 675 or greater may be possible if you score one with the latest core revision.

XDanger
08-20-07, 01:32 PM
raising my pci-e voltage on the mobo wont make any difference will it.

ATOJAR
08-20-07, 02:25 PM
As fas as im aware upping the pci-e voltage "could" allow for a higher graphics card overclock, although ive never actually tried this!