Legit Reviews

Hello, i haven't been around for a while, but in the mean time i have got myself an 8800GTS about 6 weeks ago (i know i should have held out for an 8800GT but i didn't know it would be out so soon, it's an EVGA by the way so i will Step Up to the G92 8800GTS) , anyway i was wondering about overclocking the Shader clocks. I know i can overclock the Shader clocks using Riva Tuner and i know how to enable the slider in XP.

What i want to know is how far can i go with the Shader overclock, what is considered 'safe'? I have played with it a bit and got it as high as 1600Mhz (from 1350 stock) but i am really unsure if that's too much and since there doesn't seem to be a way to monitor temperatures (even if it applies), i don't know what to set them at.

So for anyone with an 8800 (GT/GTS/GTX/Ultra) i was wondering what your Shader clocks are set too and what you would consider safe.

As long as it's stable, it's safe.

You can monitor temperatures with RivaTuner, do you have the latest (2.06) version? You should also be able to adjust fan speed.

Yea i know i can use Riva Tuner to monitor the temperatures, i use the OSD to keep any eye on everything but i'm not sure what reading would be relevant to the Shader clocks, which one is it?

I know i can use ATi Tool to check for artifacts but i am still unsure about how to test for stability when overclocking the Shader clocks. Is it basically the same as the Core and Memory, just check for artifacts?

Yep, check for artifacts.

Overclock one at a time though so when it artifacts you know what's the cause.

Well i set the Shader to 1500 and let it scan for an hour, then i set the Core to 650, the RAM to 950 and kept the Shader at 1500 and ran it for an hour with no errors. Would you say that's stable enough?

Solinari wrote:Well i set the Shader to 1500 and let it scan for an hour, then i set the Core to 650, the RAM to 950 and kept the Shader at 1500 and ran it for an hour with no errors. Would you say that's stable enough?

Play a few hours of Call of Duty 4 and see!

I don't have Call of Duty 4, i do have Medal of Honour - Airborne as well as Crysis. so i suppose i could use those games. I have played Crysis for a few hours with no problems so hopefully it's stable.

Thanks for the replies.

Regards.

I have been running ATi Tool for nearly an hour at 650/1700/950 with no errors, Everest actually reports the Shader at 1674, if i go higher than 1700 it will report it as 1728, there is no in between for some reason.




Would you say its stable and safe at those clocks now? (ATi Tool is still running, past the 60 min mark, i am going to abort now).

The shader seems to go in steps, I'm not exactly how big or small the steps are, but I'd stress test each setting for a few hours at least. I've run my shaders as high as 1944 during 3D Mark 06 artifact free (checked by ATi Tool............

Anyone know how to correctly use Rivatuner on Vista 64-bit? When I open it says my drivers are not signed and it can't launch...

Apoptosis wrote:Anyone know how to correctly use Rivatuner on Vista 64-bit? When I open it says my drivers are not signed and it can't launch...

Give me a full copy of Vista 64 and I'll mess around with it and I'll let you know ...............

http://www.newegg.com

Same place I got mine

Apoptosis wrote:http://www.newegg.com

Same place I got mine

http://www.utorrent.com/

Same place I got mine

kenc51 wrote:

Apoptosis wrote:http://www.newegg.com

Same place I got mine

http://www.utorrent.com/

Same place I got mine

Lol.


LR PSA: Legit Reviews does not endorse the illegal use of bittorrent clients.

Dan

Apoptosis wrote:http://www.newegg.com

Same place I got mine

I don't want to own the silly OS, or really use it for that matter.......... Just need a install to trouble shoot junk...............

Actually the best thing to d for OC'ing with silly non compatible OS's would be to find the best OC that you plan on running in say a stable OS like XP, then mod the cards bios and reflash to that speed............. . But then you're stuck at that speed until you reflash the card again............

Bio-Hazard wrote: then mod the cards bios and reflash to that speed............. . But then you're stuck at that speed until you reflash the card again............

you can make a card change its default speed? can you oc that speed after that? and on what cards can you do it on?(what series', ie x1K,x2K,x3K,7K, 8k, or every card ever made)

I've done every card I've owned from my old Radeon 8500 up until this current 8800GT.............. SO ATi and Nvidias are both no problem.

A good example is my current card, it's a BFG 8800GT OC with befault clocks of 625 core / 1566 shader / 900 memory. All the pics below are the same card flashed to different speeds and differenr default voltages within the bios.

So the answer to your question is yes, you can change the rated speeds within the bios and still OC the card. Don't know of to many cards that can't be done. But flashing a video cards bios is dangerous, more so than flashing your motherboards bios, so its not for the faint of heart and should be done with extreme care and caution..............

is there a walkthrough anywhere of it? thats awesome that could aleviate me of my video OCing woes

i could practice on my POS mx200 (if it can)

Check these guys out, they have a ton of different bios along with all the different bios tools for editing and reflashing your bios. The forums are a great place for help if you're having any special issue..............

http://www.mvktech.net/component/option ... Itemid,34/

so do you need a new BIOS file with the clocks you want, or just edit a copy of the backup one or edit the one its using?