# pre-transform vertex cache line size on SGX?

**URL:** <https://forums.imgtec.com/t/pre-transform-vertex-cache-line-size-on-sgx/668>\
**Category:** PowerVR Insider\
**Created:** [April 16, 2010, 11:45pm UTC](https://forums.imgtec.com/t/pre-transform-vertex-cache-line-size-on-sgx/668 "2010-04-16T23:45:54Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![boodoowaa](https://avatars.discourse-cdn.com/v4/letter/b/e5b9ba/32.png) [@boodoowaa](https://forums.imgtec.com/u/boodoowaa)\
**Post date:** [April 16, 2010, 11:45pm UTC](https://forums.imgtec.com/t/pre-transform-vertex-cache-line-size-on-sgx/668/1 "2010-04-16T23:45:54Z")

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does anybody know what it is? 32 bytes? 64 bytes to match armv7? just wondering, so to try and match my vertex layout size.

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**Author:** ![GordonMaclachlan](https://avatars.discourse-cdn.com/v4/letter/g/c68b51/32.png) [@GordonMaclachlan](https://forums.imgtec.com/u/GordonMaclachlan)\
**Post date:** [April 22, 2010, 8:41am UTC](https://forums.imgtec.com/t/pre-transform-vertex-cache-line-size-on-sgx/668/2 "2010-04-22T08:41:22Z")

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That’s not public information, I’m afraid and varies between platforms.  
  
  
  
  
  
Try to ensure your vertex size is a multiple of 4 and as small as possible - greater powers of two _may_ be better, but it depends on the platform i.e. 32 may be better than 28, but 24 may be better than 32 etc.