AMD X2 7750 Kuma 1800MHz hypertransport

[GeezerMan]

I have not studied up on AMD CPUs in awhile, and I'm looking at the Kuma 7750 with a 1800 MHz hypertransport for use in a motherboard with a 1000MHz hypertransport. What kind of performance hit am I looking at when comparing boards that have 1000MHz and 2600MHz hypertransports? I don't care about overclocking on this build, so just at stock speeds.
Thanks

 

[lopri]

There wouldn't be any performance loss since all K8/K10 talk directly to memory. HT 3.0 is for communication between CPU-CPU and CPU-IO (including PCI Express, south bridge stuff). Since current GPUs can't even fully utilize PCIe 2.0 x8 lanes, HT 1.0 is more than enough to cover any single-socket K10 system.

The problem will be, however, power/heat if your board supports Kuma or whether the board supports it at all. If it does, make sure to have a good cooling for CPU and the socket area. While 7750 is a dual-core, it's designed as a quad first so the power delivery requirement is likely more demanding than K8.

 

[GeezerMan]

Both boards support the Kuma. So why do they put so much FSB in these boards if it's not needed?
Thanks

 

[heyheybooboo]

The integrated memory controller of the K10 Kuma at stock is 1066MHz. Your memory speed should not exceed your HT speed.

If you use DDR2 1066 you will most likely have to downclock - no biggie - but it will marginally effect performance. If you use DDR2 800 it is not an issue (unless moving to 1066MHz memory in the future is an option).

I believe the issue is how it may impact any future cpu upgrade. Since the mobo will most likely support original Phenom quads and the newer PhIIs what has a marginal impact on the Kuma may have a greater impact on performance with a cpu upgrade.

I imagine you are looking at something like a Gigabyte 740g with your Kuma for a budget build. It's a great combination (and will even upgrade to an AM3 Deneb or Heka) but will not max-out the performance of the newer processors.

 

[GeezerMan]

The build is not for me. I offered to donate my ECS Geforce6100PM-M2, and the other board is the MSI K9N2GM-FD ( Geforce 8200) , which is a newer design and chipset. It's a budget build, not much gaming, more general use and HT use. I have a ATI HD 3450 to donate as the video card, so the newer chipset that the MSI has is not a factor, as far as video performance. I suspect the MSI is a better quality board, though I have had no problems with the ECS as a HT machine. Thanks

 

[Flipped Gazelle]

Originally posted by: GeezerMan
Both boards support the Kuma. So why do they put so much FSB in these boards if it's not needed?
Thanks

FSB is no longer used with AMD CPUs.

 

[skillyho]

I have used both the 7750 Kuma and said ECS Geforce6100PM-M2 mobo.....perf difference was neglible from different AM2 mobo's with the proper HTT. No worries!

 

[Sylvanas]

Originally posted by: Flipped Gazelle

Originally posted by: GeezerMan
Both boards support the Kuma. So why do they put so much FSB in these boards if it's not needed?
Thanks

FSB is no longer used with AMD CPUs.

They never did have a Front Side Bus- it's just a name that gets mixed up with HTT frequenctly.

 

[bupkus]

I'm thinking of getting a 7750 Kuma for an upgrade for a BIOSTAR MCP6P-M2 AM2 NVIDIA GeForce 6150 / nForce 430 motherboard.
Does anyone have experience with this combination?

 

[GeezerMan]

I'm surprised our Kuma arrived with AMD's cheapest HSF they have. Their basic small aluminum heatsink. No copper heatpipes at all.