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Athlon 7750 BE (Kuma) - Worth buying ?

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December 26, 2008 10:55:41 PM

Hi all.

I'm thinking to upgrade for this CPU for various reasons. One of course is performance. Or better yet price/performance vs my 4800+ X2. My board for now has a beta bios for it, in time, it will be supported. My 4800+ X2 is already lacking behind and trapping my 4850. I figured it out because of some overclocks i did up to 3.3Ghz on it. The bugger is that my ram is 533Mhz. So, although the CPU itself remained cool and below 1.4v, Prime95 ran hours endlessly flawlessly, games would just bork up because 533 Rams were just running too much above spec. Any attempt to play with Hypertransport failed, and same errors appeared.

So i need a unlocked version. My specs.

Corsair TX750
NXZT Lexa Classic
Asus Triton 70
Asus M2A-VM
4Gb DDR2 533mhz kingston.
Ati Radeon 4850.

Another reason why im looking very well at this cpu it is because in a year or so, ill turn this pc (mobo+cpu+ram) into a HTPC. And underclocking will lower its TDP tremenduosly. Of course the main reason im doing this is because gaming wise, it si just letting me down (or the 4850 down i mean).

I've seen some interesting reviews on it, showing it can easly be pushed up to 3.3 ghz, thus gaining some decent performance.

Below 100€ anybody have any suggestions ? For now that is my upper limit.

Thank you in a advance for feedback.

PS: My little brother has a Sempron 3000+, hes screaming for my 4800 X2.

More about : athlon 7750 kuma worth buying

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December 26, 2008 11:10:19 PM

Yeah, the 7750 BE is a pretty good bargin CPU. Many reviewers seem to be able to easily get past 3.0GHz, which is great for a Phenom, but of course your millage will vary. You may be able to get around 3.2-3.3Ghz with the stock cooler and at that speed it would certainly beat out an overclocked Windsor or Brisbane core.
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December 26, 2008 11:24:03 PM

Perhaps check reviews and see wether it suits you?

Why bother upgrading to another dual core when you can get cheap quads? Id say stick with dual and the next upgrade goto the quad.
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December 26, 2008 11:48:55 PM

Yes it's worth it and it's inexpensive.The highest OC that I've seen on the 7750 was 3.7 Ghz so far (most likely liquid cooling).
December 27, 2008 1:47:41 AM

either that or wait a month for deneb to come out and maybe you can go with a Quad-Core Phenom II X4 940 or a cheap Phenom 9950.
December 27, 2008 2:59:20 AM

For the cost, I think it's a great upgrade. It might not be as fast as a 6000+ or a 6400+, but once OC'd is likely to kill them both, as it has some decent headroom, and the 6400+ has about nil.

About your ram problem, somewhere there should be listed a memory divider. Memory with Athlon X2's is calculated as a fraction of its speed, so raising CPU speed will raise memory speed, but somewhere it should have the divider, on default it's likely an 8. I've only had DDR2 800, though, so I'm not really an expert on the memory/OC thing.

But if you're looking for a cheap upgrade, I think the 7750 is a great idea. When I get the cash, if no Deneb-based chips are out near its price, I might jump up from my 4000+ Brisbane.
December 27, 2008 9:36:21 AM

Dekasav said:

About your ram problem, somewhere there should be listed a memory divider. Memory with Athlon X2's is calculated as a fraction of its speed, so raising CPU speed will raise memory speed, but somewhere it should have the divider, on default it's likely an 8. I've only had DDR2 800, though, so I'm not really an expert on the memory/OC thing.

But if you're looking for a cheap upgrade, I think the 7750 is a great idea. When I get the cash, if no Deneb-based chips are out near its price, I might jump up from my 4000+ Brisbane.


Yes, memory has a multiplier somewhere but it is tied to Hyper transport. You need to lower the mul of HT (it is 5x in my case) so you underclock the ram. In this case i blame my board because even with HT underclocked, it never changed values on CPU-Z.

On the 7750 should be only Mult and Volt up, so it won't mess there methinks.

@blackpanther

no 9950 for me. Mobo gives up on living if i spat that cpu. And too expensive for that matter.
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December 27, 2008 1:02:43 PM

The ram multiplier should be based off of the CPU clock, not the hypertransport (the CPU has a direct link to the ram). That is why DDR2 800 runs at 720MHz if you have a CPU wih a half multiplier (13.5, 14.5, etc. resulting in 2.7GHz, 2.5GHz, etc.) I think my motherboard had a setting where it said DDR2 800, 667, etc. and those are the dividers.

I do agree though that BE is much easier and probably is the way to go.
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December 28, 2008 9:22:08 AM

The Kuma is excellent if you don't mind the thermals. Its about an E5200...

The triple core ones are about E7200...

Personally I would get an Athlon 5050e but it won't be much faster, just a 45 W TDP...

Might wanna save up for Phenom II or Core 2/Core i7.
December 28, 2008 11:41:09 AM

blackpanther26 said:
I ment after the release of Deneb. Do you think that is going to be the price of the 9950 or the 9750 when deneb's out? It won't be. Or you can go with a triple-core. http://www.newegg.com/Product/Product.aspx?Item=N82E16819103253

black edition just a tad under $120
http://www.newegg.com/Product/Product.aspx?Item=N82E16819103295


My board doesn't support 9950 or the 9850 BE. I guess it wont support cpus above 125W.

Non-OCed Review
http://www.xbitlabs.com/articles/cpu/display/athlon-x2-...

OCed Review
http://www.guru3d.com/article/amd-athlon-x2-7750-be-rev...

I think it is a very good CPU, if i can overclock it for 3.2Ghz, or something like that.
December 28, 2008 12:10:46 PM

amdfangirl said:

Might wanna save up for Phenom II or Core 2/Core i7.


There will be a diference.

I'm already paying a house. Ikea seems like my second morgadge (lolz).
Rebuilding a classic (my good old lancia)
Got taxes, insurances and wife by that matter.

Although i have no financial problems to splat it all on a i7 (any of them) + mobo + ram, i sens it will be silly (and reckless) to do it now.

a 70€ CPU upgrade is wife and bank account aproved :)  The first one is the harder to get :) 
December 28, 2008 6:37:44 PM

I was not meaning of getting a 9950 or 9850 but what about a Triple core or even a low end quad-core at 95watts? You can get the Phenom X4 9750 2.4GHz at 95 watts.
December 28, 2008 8:12:56 PM

blackpanther26 said:
I was not meaning of getting a 9950 or 9850 but what about a Triple core or even a low end quad-core at 95watts? You can get the Phenom X4 9750 2.4GHz at 95 watts.


It would be great. But here in Europe, that triple is aiming for 120€, a hair more what i want to spend.. Ill have to think while the 7750 is out yet.

Ill compare prices then. I'm not looking at tri or quaddies just because games don't sem to use them. Even GTA4 that was advertised as using, seems to only use 3 or 2 or 4. I've seen diferent printscreens of it. Thus aiming for the fast dual.

When it's out ill take a look at the tri-core prices. I would prefer a CPU above 2.5ghz at least. It is primarly for gaming. And BE would a nice feature. Thanks once mroe for the feedback.
December 28, 2008 9:56:54 PM

well if deneb is not out sence it's out in Greece.then I'd wait till then to decied you have all the time in the world to do so.
December 29, 2008 7:26:57 PM

blackpanther26 said:
well if deneb is not out sence it's out in Greece.then I'd wait till then to decied you have all the time in the world to do so.


Spain takes its time on new stuff aswell. I finally got my Ageia PhysX. 17€ imported from Korea. Nobody would sell me one, and most shops would ask "wuts dat".

Whatever the cpu ill get, i think im going to sweat over it also.
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December 29, 2008 8:52:57 PM

In Hong Kong, when I was trying to get myself an Athlon X2 BE-2400, all the shops were like "What? you mean the Athlon 2400+?"
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