Yeah the HPV SIMMs are extremely close to the CPU. Thanks for this information. Will add one of these on my next order.Since then I've fitted an HPV card to either a 6100 or a Pioneer MPC-GX1 (same thing, basically) and it just barely clears the hard drive with all of the VRAM sticks installed. However the VRAM SIMMs are extremely close to the processor's heat sink so they'll get hot, and you can't really use a fancy heat sink/fan combo on the processor, but maybe it would be a good idea to switch to one of the types used in the 9150 or 7200, available new (without the Peltier junction attached) as found by jessenator in another thread:
Can I request a photo or the part number of you SIMMs and HPV ? I'm having trouble getting memory chips, even NOS. More references should help.