Everyone knows the PS3 Cell processor. I bet you didn't know...
LaurieWired@lauriewired
43 views
Jan 06, 2026
~1 min read
1
Everyone knows the PS3 Cell processor.
I bet you didn't know Toshiba had a strange, cut-down Cell as a PCI-E card…for video processing.
Essentially an early form of AI upscaling, the card also implemented face detection!
Emulation nerds also got *very* excited:
I bet you didn't know Toshiba had a strange, cut-down Cell as a PCI-E card…for video processing.
Essentially an early form of AI upscaling, the card also implemented face detection!
Emulation nerds also got *very* excited:
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PS3’s Cell is notoriously difficult to emulate.
For a brief moment, Toshiba looked like the shortcut. Why emulate tricky Synergistic Processing Elements (SPEs), when you can buy them?
The card may have been intended for video encoding...but it had a free SDK.
For a brief moment, Toshiba looked like the shortcut. Why emulate tricky Synergistic Processing Elements (SPEs), when you can buy them?
The card may have been intended for video encoding...but it had a free SDK.
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As promising as it sounded, the issue was the bus.
The PS3 had a “PPE”; a small PowerPC cpu that commanded the SPEs.
The Toshiba card was only SPEs, coordination had to happen on the x86 side.
Every single synchronization event has to cross the PCI-E link.
The PS3 had a “PPE”; a small PowerPC cpu that commanded the SPEs.
The Toshiba card was only SPEs, coordination had to happen on the x86 side.
Every single synchronization event has to cross the PCI-E link.
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The x86 to “real” SPE chatter is roughly…100x to 1000x slower than the PS3’s internal bus.
The idea was quickly abandoned. Current emulators implement “software SPEs”, which map very well to x86 AVX-512 instructions and are at this point…better than the real hardware.
Still, it’s a fun thought experiment, and the Toshiba card can still occasionally be found on ebay if you want to play around with some real Cell SPEs!
The idea was quickly abandoned. Current emulators implement “software SPEs”, which map very well to x86 AVX-512 instructions and are at this point…better than the real hardware.
Still, it’s a fun thought experiment, and the Toshiba card can still occasionally be found on ebay if you want to play around with some real Cell SPEs!