Nah I mean chipset iGPUs added just $5-7. The CPU iGPUs add $30 plus the cost of the faster chip. So $30 if you were going to buy the CPU anyway, but the real cost might be $50-100. On mobile it might be even higher since you often need to buy an i7 to get the top of the line iGPU.
When Iris devices with eDRAM were being made, it was a $200-300 adder on top of the maxed out i7 config!
And $30 is a HUGE amount in terms of production cost. If it adds $30 to the MSRP of the CPU sure, but $30 is likely the cost of the entire chip.
You don't want a backup display GPU that expensive.
There was a reason why It was so cheap.
Both chipset with IGP and CPU were dirt cheap to produce at that time.
Last chipset with IGP from AMD was 890GX with HD 4290 for AM3 socket. Die size was 73 mm2 using 55 nm process.
The cost difference is:
I will use wafer prices from
this: 65nm($1937) vs 5nm($16988), let's say 55nm and 4nm have similar price. I will use for Phenom II the price of 40nm $2274.
890GX 73mm2 55nm: good dies(all dies) -> 749(806) = $2.4-2.6
Phenom II X6 1055T 346mm2 45nm: 110(154) = $14.8-20.7
For comparison:
73mm2 chip using 4nm: good dies(all dies) -> 749(806) = $21.1-22.7
346mm2 chip using 4nm: good dies(all dies) -> 110(154) = $110-154.4
Just because of increased price per wafer the $/mm2 is already ~7.45-8.8x higher.
Now back to Phoenix:
Phoenix 178mm2 4nm: good dies(all dies) -> 266(317) = $53.6-63.9
Packaging + other associated costs with production will be $20.
This is from Locuza and IGP size was calculated based on this. IC is L3 size at 4nm, also from Locuza.
The whole 12CU Phoenix IGP is ~63mm2 and I will remove It.
115mm2 4nm: good dies(all dies) -> 449(503) = $33.8-37.8
Of course, this is kinda pointless because you would need a dGPU then.
If I use just a 2CU IGP It would be ~45mm2, so I will add It back.
160mm2 4nm: good dies(all dies) -> 303(355) = $47.9-56.1
Now I will add a 24CU Phoenix IGP with ~88mm2 + 24mm2 IC or 67mm2 more than the 2CU IGP.
227mm2 4nm: good dies(all dies) -> 195(244) = $69.6-87.1
Phoenix with 24CU IGP would cost $22-31 more, depending on how much dies can be salvaged from a wafer compared to a Phoenix with a 2CU IGP.
Now I will compare margins and profit.
Let's say AMD sells R9 7940HS for $299 to manufacturers.
Product margin= (selling price – cost of product) / selling price.
Product margin: [$299-($54 or $64)-$20]/$299 = 72-75%
Profit: [$299-($54 or $64) -$20] = $215-225
If AMD sold this hypothetical Phoenix without an IGP for $219 to manufacturers.
Product margin: [$219-($34 or $538-$20]/$219 = 74-75%
Profit: [$219-($34 or $38) -$20] = $161-165
If AMD sold this hypothetical Phoenix with 2CU IGP for $269 to manufacturers.
Product margin: [$269-($48 or $56)-$20]/$269 = 72-75%
Profit: [$269-($48 or $56) -$20] = $193-201
If AMD sold this hypothetical Phoenix with 24CU IGP+IC for $369 to manufacturers.
Product margin: [$369-($70 or $87)-$20]/$369 = 71-76%
Profit: [$369-($70 or $87) -$20] = $262-279
Difference in selling price could be $50 between no IGP and 2CU IGP for comparable margins, but profit would be $32-36 higher on the one with an IGP.
Difference in selling price could be $100 between 2CU and 24CU IGP for comparable margins, but profit would be $69-78 higher on the big one.
I don't think It makes a sense to have a CPU without any IGP.
You will have to pay $100 more for a 24CU IGP.
I think that's a fantastic price for that performance.
The problem would be OEM. Manufacturers would newer put this 24CU Phoenix in a cheap laptop, so It would probably end up like Rembrandt where a laptop with faster dGPU would cost the same or less.
edit: I forgot to add 32MB IC. Facepalm.
I will recalculate It.