8800 Shader Overclocking

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Solinari
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8800 Shader Overclocking

Post by Solinari »

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.
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Zertz
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Re: 8800 Shader Overclocking

Post by Zertz »

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.
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Re: 8800 Shader Overclocking

Post by Solinari »

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?
AMD Athlon 64 x2 3800 @ 2.7Ghz
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Re: 8800 Shader Overclocking

Post by Zertz »

Yep, check for artifacts.

Overclock one at a time though so when it artifacts you know what's the cause.
Solinari
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Re: 8800 Shader Overclocking

Post by Solinari »

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?
AMD Athlon 64 x2 3800 @ 2.7Ghz
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Re: 8800 Shader Overclocking

Post by kenc51 »

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!
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Re: 8800 Shader Overclocking

Post by Solinari »

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.
AMD Athlon 64 x2 3800 @ 2.7Ghz
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Re: 8800 Shader Overclocking

Post by Solinari »

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.

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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).
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Re: 8800 Shader Overclocking

Post by Bio-Hazard »

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............ :mrgreen:

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Re: 8800 Shader Overclocking

Post by Apoptosis »

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...
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Re: 8800 Shader Overclocking

Post by Bio-Hazard »

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 ............... :mrgreen:
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Re: 8800 Shader Overclocking

Post by Apoptosis »

http://www.newegg.com

Same place I got mine :)
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Re: 8800 Shader Overclocking

Post by kenc51 »

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

Same place I got mine :)
http://www.utorrent.com/

Same place I got mine :finga: :lol:
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Re: 8800 Shader Overclocking

Post by DMB2000uk »

kenc51 wrote:
Apoptosis wrote:http://www.newegg.com

Same place I got mine :)
http://www.utorrent.com/

Same place I got mine :finga: :lol:
Lol.


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

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Re: 8800 Shader Overclocking

Post by Bio-Hazard »

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.......... :shock: Just need a install to trouble shoot junk............... :mrgreen:

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............. :shock: . But then you're stuck at that speed until you reflash the card again............ :supz:
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skier
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Re: 8800 Shader Overclocking

Post by skier »

Bio-Hazard wrote: then mod the cards bios and reflash to that speed............. :shock: . But then you're stuck at that speed until you reflash the card again............ :supz:
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)
-Austin
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775 System (Overclocking Platform): Q8400/Q8300/E8400/E7400/E7500 - GA-EP45-UD3R v1.1 - 4GB (2x2) OCZ Reaper HPC DDR2 1066 CL5 2.1v Corsair TX-750w
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Re: 8800 Shader Overclocking

Post by Bio-Hazard »

I've done every card I've owned from my old Radeon 8500 up until this current 8800GT.............. 8) 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.............. :mrgreen:
Attachments
Card flash to SSC specs and OC'd to 801 / 1834 / 1000
Card flash to SSC specs and OC'd to 801 / 1834 / 1000
GPUzSSC.OC.JPG (29.88 KiB) Viewed 12166 times
Card flashed to the EVGA 8800GT SSC specs. 700 / 1750 / 1000.
Card flashed to the EVGA 8800GT SSC specs. 700 / 1750 / 1000.
GPUzSSC.JPG (48.27 KiB) Viewed 12172 times
Card default bios and the card OC'd to 702 / 1758 / 1003.
Card default bios and the card OC'd to 702 / 1758 / 1003.
GPUzOC.OC.jpg (46.37 KiB) Viewed 12154 times
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skier
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Re: 8800 Shader Overclocking

Post by skier »

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

i could practice on my POS mx200 :P(if it can)
-Austin
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Screamin' BCLK: Image
775 System (Overclocking Platform): Q8400/Q8300/E8400/E7400/E7500 - GA-EP45-UD3R v1.1 - 4GB (2x2) OCZ Reaper HPC DDR2 1066 CL5 2.1v Corsair TX-750w
Gamer: Asrock Z77 Extreme4, i7 3770K @4.6GHz, ThermalTake Armor A90 modded, 2x4GB GSKILL RipjawsX DDR3 2133 CL9, Corsair HX-750w, MSI GTX660 Twin Frozr
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Re: 8800 Shader Overclocking

Post by Bio-Hazard »

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.............. :mrgreen:

http://www.mvktech.net/component/option ... Itemid,34/
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skier
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Re: 8800 Shader Overclocking

Post by skier »

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?
-Austin
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Screamin' BCLK: Image
775 System (Overclocking Platform): Q8400/Q8300/E8400/E7400/E7500 - GA-EP45-UD3R v1.1 - 4GB (2x2) OCZ Reaper HPC DDR2 1066 CL5 2.1v Corsair TX-750w
Gamer: Asrock Z77 Extreme4, i7 3770K @4.6GHz, ThermalTake Armor A90 modded, 2x4GB GSKILL RipjawsX DDR3 2133 CL9, Corsair HX-750w, MSI GTX660 Twin Frozr
Server2012: Q9300 - 8GB DDR2 - Asus P5QL Pro - Corsair CX430 - Mirrored 2TB Seagate's with 2TB WD cav for fileshare backups, 1TB WD for OS backups
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