Quote:
Originally Posted by The Stilt
"There are no such things" can you elaborate a bit on that?
I have both, the 7960X and 1950X.
Even if I had only the 7900X, I'd still use it for HEVC encoding rather than the 1950X due to speed and higher efficiency.
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Annand tech bench is simply stupid and ridiculous test:
- 4K HEVC source at very high bitrate (~140 fps at 100% CPU charge just for stream decoding on i9-7900X and 1950X ... and Intel is really better than AMD for that)
- Really high speed setting (40 fps and more for 4K x265 encoding ... !!!?).
Certainely that Handbrake use high CPU charge just for 4K HEVC decoding source.
I make more serious bench here with 4K source and x265 encoding with preset "medium":
https://forum.doom9.org/showthread.php?t=174393
Code:
|----------------|---------|---------|---------|---------|---------|---------|---------|---------|---------|---------|---------|--------|
| CPU | x264 | x265 | LAVC | auto | MMX2 | SSE | SSE2 | SSE3 | SSE4 | AVX | AVX2 | All |
|----------------|---------|---------|---------|---------|---------|---------|---------|---------|---------|---------|---------|--------|
| 1950X | 37.59 | 6.50 | 136 | 4.65 | 2.02 | 2.00 | 2.95 | 3.10 | 3.89 | 4.10 | 4.26 | N/A |
| Core i9-7900X | 29.37 | 5.47 | 145 | 4.38 | 1.35 | 1.35 | 2.14 | 2.32 | 3.49 | 3.50 | 4.30 | N/A |
For real x265 encoding (less than 5% on CPU charge for source decoding):
- 1950x@stock 16C/32T is faster than i9-7900x@stock 10C/20T for x265 4K encoding.
- SSE4 at same speed and same core number is on par for Intel and AMD for x265 encoding.
- AVX2 produce 15-20% speed improuvement for Intel vs AMD in x265 encoding (on all modern CPU)
- AVX2 is not really efficient for x264: at same speed and same core number Intel and AMD are on par for speed encoding.