I just had a run-in with a 4790T, so since there is a serious lack of information on T-series CPUs on the internet I thought I'd leave some info for anyone interested. And any googlers trying to find information on it... 
The 4790T is basically your run-of-the-mill Haswell 4C/8T/GT2, essentially identical to other Haswell i7's, so there is not much to say there. Except the 45W TDP and it seems to be slightly better binned. You can't overclock it, so I have no way of confirming that. It has every extension other i7 have, including TSX and is VT-d compatible. With a compatible mainboard of course, the one I had access to didn't support it.
Maximum rated frequency is 2700MHz, with turbo on all cores at 3300MHz. Three cores have a 3600MHz turbo ceiling. Two cores can boost to 3800MHz, and single core turbo is 3900MHz. This particular sample had zero issues staying at maximum turbo, if you didn't load up the graphics core simultaneously. (Rated at 2700MHz/4CT 3300MHz/3CT 3600MHz/2CT 3800MHz/1CT 3900MHz)
Idle core voltage is 0.678V with load at 0.990V (1.045V for AVX2 load). Quite impressive.
Now I didn't have too much time at hand, so I had to settle for a quick run through Aida64's benchmark section:
CPU Queen: 42161. Compare with the built-in 2600non-K's 43907 3770K's 46747 and 4770non-K's 47291
CPU PhotoWorxx: 17556 MPixel/s (2600: 11115 MPixels/s 3770K: 14178MPixels/s 4770: 14001 MPixel/s)
CPU Zlib: 285.5MB/s (2600: 289.2MB/s 3770K: 317.2MB/s 4770: 320MB/s)
CPU AES: 14987MB/s (2600: 13681MB/s 3770K: 14455MB/s 4770: 16800MB/s)
CPU Hash: 3376MB/s (2600: 2544MB/s 3770K: 2995MB/s 4770: 3786MB/s)
FPU VP8: 5464 (2600: 5279 3770K: 6307 4770: 6391)
FPU Julia: 26171 (2600: 18457 3770K: 19516 4770: 26953)
FPU Mandel: 14005 (2600: 9777 3770K: 10344 4770: 14429)
FPU Sin Julia: 4205 (2600: 4679 3770K: 4617 4770: 4984)
Now I don't know weather or not the reference CPUs use turbo to their full potential. But those are interesting results, especially when you keep in mind that this is a 45W rated CPU. All the others are rated at 77W or 95W.
I'll hold of any conclusions here, but I'd love to get that thing into a proper enthusiast mainboard to test. Unfortunately this is an OEM box, so I can't really justify picking it apart to satisfy my curiosity...
Closing remark on the Included HD4600, it has the same 1200MHz clock as a regular 4790, so I'd expect it to perform identically. Unless its thermally limited, which I haven't been able to test.
The 4790T is basically your run-of-the-mill Haswell 4C/8T/GT2, essentially identical to other Haswell i7's, so there is not much to say there. Except the 45W TDP and it seems to be slightly better binned. You can't overclock it, so I have no way of confirming that. It has every extension other i7 have, including TSX and is VT-d compatible. With a compatible mainboard of course, the one I had access to didn't support it.
Maximum rated frequency is 2700MHz, with turbo on all cores at 3300MHz. Three cores have a 3600MHz turbo ceiling. Two cores can boost to 3800MHz, and single core turbo is 3900MHz. This particular sample had zero issues staying at maximum turbo, if you didn't load up the graphics core simultaneously. (Rated at 2700MHz/4CT 3300MHz/3CT 3600MHz/2CT 3800MHz/1CT 3900MHz)
Idle core voltage is 0.678V with load at 0.990V (1.045V for AVX2 load). Quite impressive.
Now I didn't have too much time at hand, so I had to settle for a quick run through Aida64's benchmark section:
CPU Queen: 42161. Compare with the built-in 2600non-K's 43907 3770K's 46747 and 4770non-K's 47291
CPU PhotoWorxx: 17556 MPixel/s (2600: 11115 MPixels/s 3770K: 14178MPixels/s 4770: 14001 MPixel/s)
CPU Zlib: 285.5MB/s (2600: 289.2MB/s 3770K: 317.2MB/s 4770: 320MB/s)
CPU AES: 14987MB/s (2600: 13681MB/s 3770K: 14455MB/s 4770: 16800MB/s)
CPU Hash: 3376MB/s (2600: 2544MB/s 3770K: 2995MB/s 4770: 3786MB/s)
FPU VP8: 5464 (2600: 5279 3770K: 6307 4770: 6391)
FPU Julia: 26171 (2600: 18457 3770K: 19516 4770: 26953)
FPU Mandel: 14005 (2600: 9777 3770K: 10344 4770: 14429)
FPU Sin Julia: 4205 (2600: 4679 3770K: 4617 4770: 4984)
Now I don't know weather or not the reference CPUs use turbo to their full potential. But those are interesting results, especially when you keep in mind that this is a 45W rated CPU. All the others are rated at 77W or 95W.
I'll hold of any conclusions here, but I'd love to get that thing into a proper enthusiast mainboard to test. Unfortunately this is an OEM box, so I can't really justify picking it apart to satisfy my curiosity...
Closing remark on the Included HD4600, it has the same 1200MHz clock as a regular 4790, so I'd expect it to perform identically. Unless its thermally limited, which I haven't been able to test.
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