Sapphire HD7750 Low Profile reviews thread

[CAT-THE-FIFTH]

Two reviews so far:

http://www.kitguru.net/components/gr...xfx-and-his/2/

http://www.hitechlegion.com/reviews/...50-low-profile

It does not need a PCI-E power connector and the card could be overclocked a decent amount too from 800MHZ to 1GHZ.

[scaryjim]

It'd be nice to see a proper review of one of these. The kitguru review was doing OK until they started whinging about how the 7750/70 have less shaders than the 6750/70 so they're never going to be as good as they should be - missing the point that this they also have a completely different architecture! And the HiTech Legion review has no comparison cards, and uses an E6600 as the basis for the test bed

Come on Hexus, we know you're chummy with Sapphire - get one of these little beauties into the labs

[holy god of nil]

I want one of these! Hope they come out soon.

[isabella]

Might be worth getting a pair and get 7000+ in 3d mark 11. Cool and quiet.

[CAT-THE-FIFTH]

Here is a review of the Club 3D HD7750 low profile:

http://www.techpowerup.com/reviews/C...0_Low_Profile/

[scaryjim]

Hmmm - 7850 is twice as fast at all resolutions as a 7750? AMD need to plug that gap, IMNSHO. 7830 anyone?

[CAT-THE-FIFTH]

Hmmm - 7850 is twice as fast at all resolutions as a 7750? AMD need to plug that gap, IMNSHO. 7830 anyone?

Well,the GTX660 non-TI might use the GK106. It could be quite efficient??

[scaryjim]

I'll be interested to see what comes out of that. I'd never have backed nvidia to have the best bus-powered low-profile card previously, but Kepler is damn efficient. Problem is we've not yet seen how it scales with shader reductions, and since we've only really seen 2 variants (670 and 660Ti being virtually core-idential) it could be that performance drops off dramatically with the smaller die.

I'll have to go looking for Kepler GT640 reviews ... I'm assuming there are few of them and it's uninspiring though...


Hmm, Tom's have a reasonable GT640 review. Unsurprisingly, as a DDR3 entry level card it gets buried by the 7750, whilst swapping places with the 6670 depending on game. The worrying thing for nvidia is that the 7750 only pulls 20W more than the GT640 at load, so they don't have a lot of thermal & power draw headroom to play with in improving the card. If the GK106 is an 1100+ shader card, I doubt they could keep even a cut down version under 75W. The 7750 may remain the best-performing bus-powered card for some time...

[CAT-THE-FIFTH]

The GTX650,probably will not be bus powered I suspect and is using the GK107 with GDDR5.

The GTX660 non-TI against the HD7850 would be interesting, At least for that class of card a 192 bit memory controller would be fine.

TBH,I would rather a card like the HD7870 was around £150 or its Nvidia equivalent,as plenty of HD5850 1GB owners like me want a decent upgrade(without needing to overclock).

[CAT-THE-FIFTH]

It seems the GK106 will use 960 shaders.

[scaryjim]

I'd be interesting to see how much difference DDR5 memory makes to the GT640 (if the GT650 does indeed turn out to be a 640 with DDR5). I'm a little surprised as to how close the 640 runs the 6670, tbh, although it's very variable - sometimes a long way behind the 6670, sometimes a reasonable distance ahead. Nonetheless, it's the best contender nvidia's had in that segment for a long time - I can't remember the last time I recommended an nvidia card below £100 (probably the 9800GT Eco version, tbh).

That said, it's *always* well behind the 7750, which also falls into the same < £100 bracket.

Ebuyer have a number of GT640s in stock for between £75 and £80. Problem is you can get a roughly equivalent 6670 for < £65, or a much better 7750 for around £90. They also have the Powercolor Low Profile 7750 in stock for £98. Hmmm, that's really tempting to add to my low power Phenom II X4 and the 785G mobo I just took out of my old HTPC ... that'd be a brilliant low-power gaming box

[CAT-THE-FIFTH]

The GTX660 non-TI looks like it might be around HD7850 level,or slightly better. I wonder how big the die size is?? The GK107 is around the same as Pitcairn found in the HD7750 and HD7770.

[scaryjim]

Techreport have a typically good review of the GT640 against the 7750 too: http://techreport.com/articles.x/23179/1

It says pretty much what I thought - a DDR5 version should be a lot more competitive and nvidia need to release it soon, at the same price as the current GT640.

If it's a 960 shader die it's likely to be up to 3x the size of the GK107 die (which is 384 shaders). Although I read something recently which said 960 makes no sense from an NV point of view, as that would be 5 SMX, and that full GK106 might be 1152 shaders (for GTX660), with GTX650Ti being a cut down die with 960 shaders (i.e. 1 SMX removed).