@pc_rocks said:@michaelmikado said: The
@pc_rocks said: @gamecubepad said: 4k gaming on the PS4 Pro has 150W total system power consumption. Same game is 150W on PS4. Both systems were $399 competing against $500 systems from MS.
So not only does the total system need to consume only around 150W, it also needs to fit within a ~$380 BoM. Next gen systems will have something like 8-core 3rd-gen Ryzen CPU, 16GB GDDR6, 2GB sideport DDR4, 2TB HDD, and UHD Blu-Ray. Whatever is leftover from that power consumption and cost will determine what GPU they can include.
These are rumors of course, same rumors that said no 7nm Vega for gamers, so that was wrong, but they give a decent idea of where a PS5 GPU could slot. P.S.-Given the 7nm Radeon VII, these power consumption and price points seem very hopeful.
RX 3080Navi 108GB GDDR6150WRTX 2070/ GTX 1080$249RX 3070Navi 128GB GDDR6120WGTX 2060/GTX 1070$199Polaris 10 was also "supposed" to be a 150W part, and they had to downclock it 25% to get it into the PS4 Pro, and on the X1X, they had to use Hovis method and vapor chamber cooler with 384-bit memory bus to get stock performance. I don't think $399 gets you Hovis and vapor chamber cooler. Also, RTX 2060 is a $350 card, so they won't be hitting that performance with a $199 card now that we've seen their 7nm Vega pricing.
One thing to keep in mind here is that Radeon VII and other AMD cards have been using HBM2 to decrease their power draw. If the go with GDDR6 on conoles their TDP would be higher and if they go with HBM2, price would be higher.
Why not just go with 4-8GB of HBM2 on die and 12-16GB GDDDR5 to keep costs down? I think I read GDDR5 is half the price of GDDR6 and with a bank of 8GB HBM2 you’re good on bandwidth.
8GB HBM is still expensive and so is GDDR6 but it's cheaper than GDDR5. In short both are expensive for $400 consoles. Then going with GDDR5 brings you the problem of low bandwidth.
In terms of bandwidth HBM2 > GDDR6 >>> GDDR5
Price HBM2 >> GDDR6 >> GDDR5
Power draw GDDR5 > GDDR6 > HBM2
Not to mention HBM2 also eats the silicon budget for that substrate.
But your scenario only holds true if they fully commit to one type of Vram. A small stack of HBM2 can easily be put on die which further reduces TDP, heat, etc. obviously going full HBM2 would be cost prohibitive but no ones suggesting that. Further to reduce costs and power draw were more like to see a small bank of flash mem, likely 32-64GB of eMM than to see a Blu-ray drive. If even bet they would make the HDD completely optional if they had onboard emm. Consoles since the X360 have had smaller banks of high bandwidth ram. The PS4 having completely unified high bandwidth RAM was the exception, not the rule.
I only suggested GDDR5 for cost reasons with HBM2 offsetting the bandwidth constraints, but pairing a small HBM2 stack on die with a healthy amount of GDDR6 was always the way I assumed they go as it’s gives the best all around cost/performance/TDP ratios.
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