Ok just done some digging and from what I can tell the problem is the bios is legacy and not UEFI so no nvidia card later than a GTX 600 series will work and there is no bios available to fix this.
Your options are to either get a gtx 600 series Gpu or swap out the motherboard in which you will probably need to change the case and psu aswell since it is probably a custom HP design so with the 2nd option your probably best just replacing the lot but obviously this depends on your budget.
Your options are to either get a gtx 600 series Gpu or swap out the motherboard in which you will probably need to change the case and psu aswell since it is probably a custom HP design so with the 2nd option your probably best just replacing the lot but obviously this depends on your budget.
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