# Sgx530 z buffer precision....

**URL:** <https://forums.imgtec.com/t/sgx530-z-buffer-precision/955>\
**Category:** PowerVR Insider\
**Created:** [December 25, 2010, 11:34pm UTC](https://forums.imgtec.com/t/sgx530-z-buffer-precision/955 "2010-12-25T23:34:55Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![tiggersgi](https://avatars.discourse-cdn.com/v4/letter/t/9fc348/32.png) [@tiggersgi](https://forums.imgtec.com/u/tiggersgi)\
**Post date:** [December 25, 2010, 11:34pm UTC](https://forums.imgtec.com/t/sgx530-z-buffer-precision/955/1 "2010-12-25T23:34:55Z")

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Hi All,  
  
I’ve a problem with my shadow mapping shader on sgx530 chips ( working fine on 535,540 ). The problem seems to be the zbuffer precision&nbsp; compared to the 535,540.  
  
Is the 530 quite different to the 535,540? I’ve attached a image that shows the problem, on the 535/540 it’s clean but here on the 530 its a bit of a mess…  
  
Cheers  
  
 ![](https://sites.google.com/site/devatskus/_/rsrc/1293323056275/home/device.png)

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**Author:** ![aaron](https://avatars.discourse-cdn.com/v4/letter/a/e19adc/32.png) [@aaron](https://forums.imgtec.com/u/aaron)\
**Post date:** [January 4, 2011, 9:26am UTC](https://forums.imgtec.com/t/sgx530-z-buffer-precision/955/2 "2011-01-04T09:26:03Z")

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Could you attach a ‘correct’ image that matches the ‘problem’ image?