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NEW Winfast 7800 GT problems

post #1 of 10
Thread Starter 
Hi all I just got a new grx card and new system parts from overclockers.co.uk. a Winfast 7800 GT 265. I am getting a lot of artefacts on the screen. I had problems when I built my new system at the post tests I was getting the same thing on the Asus screen. I flash the m-board bois and it seemed to be ok. Could also run BF2 full pelt no problems but when I ran 3dmark 05 this morning it stated can run the 1st test 1st 2nd test ok then it starts. Screen goes pink or green with lots of artefacts on screen. My psu is new to. Any ideas
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post #2 of 10
This is likely to be the Geometric Delta Clock. Use nvflash to backup your GFX's bios, then edit the bios with nibitor. Check what the Geometric Delta clock is set to. It's probably 30 or 40, if so, change to 0 and save. Then flash the bios back to your card and hopefully it should be okay.
Clevo P170HM
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Clevo P170HM
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post #3 of 10
Quote:
Originally Posted by Ste
This is likely to be the Geometric Delta Clock. Use nvflash to backup your GFX's bios, then edit the bios with nibitor. Check what the Geometric Delta clock is set to. It's probably 30 or 40, if so, change to 0 and save. Then flash the bios back to your card and hopefully it should be okay.
Sounds like its a common problem the way you put it lol
post #4 of 10
Thread Starter 
ahh ok i will try that i phoned the company i got it from and they want me to rma it back to them. have you all head of this problem a lot
The Wee System
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I7 2600 K ASUS P8P67 Pro CF MSI R6950/70 Flashed 2GB 16 GB Mushkin Silverline 1333 4*4GB 
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OCZ Solid 3 60GB SSD, 1TB Samsung F1 WIN 7 ULT x64/ MInt Samsung 24" lcd Razor Blackwidow 
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The Wee System
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OCZ Solid 3 60GB SSD, 1TB Samsung F1 WIN 7 ULT x64/ MInt Samsung 24" lcd Razor Blackwidow 
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post #5 of 10
Quote:
Originally Posted by scotishhaggis
ahh ok i will try that i phoned the company i got it from and they want me to rma it back to them. have you all head of this problem a lot
Yeah, it's a common problem with the 7800GT range. Of course, it could be a faulty card, but a lot of them have similar problems that are fixed this way.
Clevo P170HM
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Clevo P170HM
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post #6 of 10
Thread Starter 
cheers that worked great i used winfox insted of nvflash and it worked ok . what is Geometric Delta Clock rate and what you do . tried to google it no luck?
The Wee System
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CPUMotherboardGraphicsRAM
I7 2600 K ASUS P8P67 Pro CF MSI R6950/70 Flashed 2GB 16 GB Mushkin Silverline 1333 4*4GB 
Hard DriveOSMonitorKeyboard
OCZ Solid 3 60GB SSD, 1TB Samsung F1 WIN 7 ULT x64/ MInt Samsung 24" lcd Razor Blackwidow 
PowerCaseMouse
1kw BFG Coolermaster HAF 932 Logitec G9 
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The Wee System
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OCZ Solid 3 60GB SSD, 1TB Samsung F1 WIN 7 ULT x64/ MInt Samsung 24" lcd Razor Blackwidow 
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post #7 of 10
Quote:
Originally Posted by scotishhaggis
cheers that worked great i used winfox insted of nvflash and it worked ok . what is Geometric Delta Clock rate and what you do . tried to google it no luck?
Essentially, it speeds up the core by the setting. Eg. Core speed of 430Mhz and a Delta Clock of 40 would give an effective speed of 470Mhz on the core.
Quite a few of the GT cores struggle with this setting and cause the problems you were experiencing.
Clevo P170HM
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Clevo P170HM
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post #8 of 10
Thread Starter 
so am i screwed to overclock this then
The Wee System
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OCZ Solid 3 60GB SSD, 1TB Samsung F1 WIN 7 ULT x64/ MInt Samsung 24" lcd Razor Blackwidow 
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The Wee System
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CPUMotherboardGraphicsRAM
I7 2600 K ASUS P8P67 Pro CF MSI R6950/70 Flashed 2GB 16 GB Mushkin Silverline 1333 4*4GB 
Hard DriveOSMonitorKeyboard
OCZ Solid 3 60GB SSD, 1TB Samsung F1 WIN 7 ULT x64/ MInt Samsung 24" lcd Razor Blackwidow 
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post #9 of 10
Quote:
Originally Posted by scotishhaggis
so am i screwed to overclock this then
No, not necessarily. It is probably the Delta Clock speed that is causing the artifacts and not the overall core speed of the GFX. You might well be able to reach higher speeds on the core after overclocking than with the original core and Delta Clock speeds, without getting any artifacts.
Clevo P170HM
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Clevo P170HM
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post #10 of 10
http://www.overclock.net/faqs/70852-...g-strange.html
here i did a FAQ on it
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My System
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