Yeah, that sounds reasonable. I don't know much about RX 5500 vs RX 580. Wouldn't the RX 5700 be a bit of a downgrade compared to what it had previously? But, maybe going top-of-the-line wouldn't gain that much but add too much cost?
One thing to watch on prices, is how much RAM. I noticed with the Mac Pro add option, people were quoting $400'ish for the price and complaining about Apple's markup, but I think Apple's card has 2x the RAM as the ones most people are buying.
But, bottom line for me, I'd love to see Blackmagic maintain a 'regular' and 'pro' model of eGPU with this design, keeping whatever is the reasonable 'normal' and 'high-end' GPUs in each model. I hope that is what is going on here... though one would think it would be best to have the replacement when you announce you're dropping the current.
The RDNA GPUs will be better value in the future as support ought to be better; AMD drivers aren't in a good place generally at the moment.
Speed of RAM is also a major factor. GDDR6 is faster than GDDR5, HBM is even faster still but costs escalate as AMD use the faster RAM to help them get performance. There's even talk of the Sony PS5 skipping traditional DDR4 RAM and going straight to high performance GDDR6 ram to eliminate bottlenecks in the system - they are already using high performance NAND and not the cheap stuff. It's all about loading times for these games consoles.
The issue with Blackmagic's eGPU is the fact it's non replaceable within the enclosure - within 3 years it'll be old news and you're left with something that will be effectively an expensive doorstop with an increasingly poor performance per watt.
This wouldn't be as much of an issue if the unit itself did something unique - for instance if there was a cooling solution that made it properly silent for a long time if being caned - either by video rendering or games playing. I can't imagine that Blackmagic will have sold many of these either - which would also have contributed to the high unit cost.
With so few users then, there's probably not too much clamour to fix things when (like the AMD driver) things go a bit shaky.
The sad fact is there's nothing in the Mac arena to encourage developers to sit up and look for games development - even with the presence of Metal on the scene which I'd imagine is more for iPad developers than Mac developers.
And the most cost effective solution for Mac users wanting a headless Mac with better graphics would actually be to get one with a discrete GPU already onboard - something which the Mini isn't built to cater for.
Try and do a comparison with an entry level MacBook Pro 16", and then price up a Mac mini with comparable storage - adding an enclosure bought from Amazon UK.
Off the shelf Macbook Pro 16" with 512Gb SSD and 5300M graphics: £2399
Mac mini i5 16Gb RAM, 512Gb SSD (matching the MBP16): £1299.
Razer Core Chroma Enclosure with Thunderbolt Cable: £400 (I know cheaper ones exist but Amazon UK just bumped the price of the Core X up quite high)
Radeon 5500XT: £200
Mini system: £1899 vs MBP for an extra 500 quid - and then ask yourself how much a retina screen is and the ability to carry the MBP away or the ability to survive a power cut due to the built in battery. I use my MBP in clamshell mode - I have rarely used the built in screen so far so in effect I already have my Mac mini with a built in GPU.
Yes there will be performance variances between GPU and CPUs between the systems but shockingly the CPU benchmarks don't seem to be far apart. Yes, I'd accept the GPU difference is far greater between a 5500XT and a 5300m. And the MBP can't have memory upgraded after purchase, whereas the Mini can. And the 5500XT can be upgraded again too.
But I'm happy to leave the gaming to the consoles or PC and go with decent built-in GPU performance on an external monitor. And there's nothing to stop me in the future from purchasing an eGPU and suitable graphics card - the MBP has 4 Thunderbolt 3 ports as well. And I can pick the MBP up and go somewhere else and do some work if I wanted to.
Bear in mind this is before you find a variety of deals on the MBP. Shortly after the 16" MBP was introduced you could purchase it at a substantial discount as an off the shelf system and MacRumors is always listing deals for stock MBP16".
It's a just a bit harder to justify the cost of building up a Mac mini to compete. And there's possibly a major reason why Apple are showing no interest in beefing the Mini up with a permanent discrete GPU.
which seems to indicate that the 5500 works fine - he even got a damn login screen! (which is apparently something others have had issues with).
Totally agree with the guy's line that Sapphire cards appear to be better for Macs. They generally seem to get decent reviews.