[QUOTE="xboxiphoneps3"]
PS4 GPU has 50% more shader performance with volitalie bit cacher to improve simulatenious shader and compute performance
has 6 more CU's and 16 more ROPS
ronvalencia
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7870's 32 ROPs wouldn't be fully utilized i.e. my 7970's 32 ROPS says hi and it can run games at higher resolution/higher details than 7870.
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"Volitalie bit" is for L2 cache i.e. it makes better use of the existing L2 cache (SRAM type) for compute instead of textures i.e. recycling L2 cache for compute would reduce the L2 cache for textures.
X1 could have 32 MB ESRAM for compute i.e. it's like gluing massive L3 SRAM cache on server CPUs. Recycling ESRAM for compute would reduce the amount for textures.
PS4's GCN has compute SRAM space that covers L1 + LDS + L2 cache.
PS4's 18 CU's SRAM pool = 4608 KB register file, 288 KB L1 cache, 1152 KB LDS, 512 KB L2 cache (128KB x four memory channels). PS4 has 176 GB/s GDDR5 memory.
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X1's 12 CU's SRAM pool = 3072 KB register file, 192 KB L1 cache, 768 KB LDS and 32 MB ESRAM. X1 has 68 GB/s DDR3 memory (LZ compression not factored in).
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7970's 32 CU's SRAM pool = 8192 KB register file, 512 KB L1 cache, 2048 KB LDS. For additonal overspill, 7970 has 264 GB/s to 288 GB/s (for 7970 GE) memory bandwidth from 384bit GDDR5 i.e. this brute force memory would be faster than X1's 32 MB ESRAM.
The approach is similar to Intel Xeon Phi's 512 bit GDDR5 (352 GB/s) i.e. instead of gluing large L3 caches; Intel equiped Xeon Phi with 512 bit GDDR5 memory.
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Memory speed ranking
1. Register file
2. L1 cache
3. Local Data Store
4. L2 cache
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5. 7970's 384 bit GDDR5
6. X1's ESRAM
7. PS4's 256 bit GDDR5
8. X1's 256bit DDR3
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Not including 7990, 7970 Ghz Edition is still the fastest in the GCN in the family.
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So the xbox one has a 7970.? because that is the only way your post will actually refute what he say,he was comparing it to the xbox one not your over priced PC.
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