try to flash this timings:
777000000000000022C39C00AC595A3D90550F12B84C8408004006007E0514206A8900A00200312 0100F292F94273116
or this
999000000000000022C39C00AC595A3D90550F123CCF530C004006007E0514206A8900A00200312 0100F292F94273116
I think these timings are for Hynix 4GB, not the 8GB ones.
I suggest to use the SRBPolaris's PimpMyStraps or One-click straps from PolarisBiosEditor. It's safe and improve performance. Oh PM me if you wanna more performance.
If you already have a biosmoded GPU, maybe you need to deal with the intensity.
Any difference between PimpMyStraps or One-click straps or is it just a name?
Not sure if this a re 4Gb versions, but ill give it a try, from 1750?